Benchmark 2021-B31 Mortgage Trust

07/01/2026 | Press release | Distributed by Public on 07/01/2026 14:26

Asset-Backed Issuer Distribution Report (Form 10-D)


Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STATEMENT TO NOTEHOLDERS
June 17, 2026
TRANSACTION PARTIES
Depositor: Citigroup Commercial Mortgage Securities Inc.
Master Servicer: Midland Loan Services, a Division of PNC Bank N.A.
Special Servicer: Rialto Capital Advisors, LLC
Asset Representations Reviewer /
Pentalpha Surveillance LLC.
Operating Advisor:
Trustee: Wilmington Trust, National Association
Certificate Administrator: Citibank, N.A.
Danny Lee Citibank, Agency and Trust
(212) 816-4936 388 Greenwich Street Trading, 4th Floor
[email protected] New York, NY 10013
TABLE OF CONTENTS
1 . Distribution Summary 2
1.1 . Summary 2
1.2 . Factors 3
2 . Distribution Detail 4
2.1 . Interest Detail 4
2.2 . Interest Shortfall Detail 5
2.3 . Principal Detail 6
3 . Reconciliation Detail 7
4 . Other Information 8
5 . Stratification Detail 9
6 . Mortgage Loan Detail 14
7 . NOI Detail 16
8 . Delinquency Loan Detail 18
9 . Collateral Performance Delinquency and Loan Status Detail 19
10 . Appraisal Reduction Detail 20
11 . Historical Appraisal Reduction Detail 21
12 . Loan Modification Detail 22
13 . Historical Loan Modification Detail 23
14 . Specially Serviced Loan Detail 24
15 . Historical Specially Serviced Loan Detail 25
16 . Unscheduled Principal Detail 27
17 . Historical Unscheduled Principal Detail 28
18 . Liquidated Loan Detail 29
19 . Historical Liquidated Loan Detail 30
20 . CREFC Investor Reporting Package Legends 31
21 . Notes 32
Reports Available at sf.citidirect.com v. 21.09.28 Page 1 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION SUMMARY
June 17, 2026
Accretion
&
Non-Cash
Accrual Other Balance
Original Prior Pass-Through Day Interest (As Interest) Principal Total Realized Loss Increase/ Current
Class Balance Balance Rate Count Distributed Distributed Distributed Distributed /(Recovery) (Decrease) Balance
A-1 19,800,000.00 2,336,288.04 1.357000 % 30/360 2,641.95 - 379,780.21 382,422.16 - - 1,956,507.83
A-2 138,050,000.00 138,050,000.00 2.588000 % 30/360 297,727.83 - - 297,727.83 - - 138,050,000.00
A-3 23,220,000.00 23,220,000.00 2.703000 % 30/360 52,303.05 - - 52,303.05 - - 23,220,000.00
A-4 215,000,000.00 215,000,000.00 2.420000 % 30/360 433,583.33 - - 433,583.33 - - 215,000,000.00
A-5 575,676,000.00 575,676,000.00 2.669000 % 30/360 1,280,399.37 - - 1,280,399.37 - - 575,676,000.00
A-AB 23,526,000.00 23,526,000.00 2.615000 % 30/360 51,267.07 - - 51,267.07 - - 23,526,000.00
A-S 142,182,000.00 142,182,000.00 2.892000 % 30/360 342,658.62 - - 342,658.62 - - 142,182,000.00
B 63,981,000.00 63,981,000.00 2.748000 % 30/360 146,516.49 - - 146,516.49 - - 63,981,000.00
C 60,428,000.00 60,428,000.00 3.195000 % 30/360 160,889.55 - - 160,889.55 - - 60,428,000.00
D 37,322,000.00 37,322,000.00 2.250000 % 30/360 69,978.75 - - 69,978.75 - - 37,322,000.00
E 26,659,000.00 26,659,000.00 2.250000 % 30/360 49,985.62 - - 49,985.62 - - 26,659,000.00
F 26,660,000.00 26,660,000.00 2.250000 % 30/360 49,987.50 - - 49,987.50 - - 26,660,000.00
G 14,218,000.00 14,218,000.00 2.250000 % 30/360 26,658.75 - - 26,658.75 - - 14,218,000.00
H 55,095,655.00 55,095,655.00 2.250000 % 30/360 68,392.65 - - 68,392.65 - - 55,095,655.00
R - - 0.000000 % 30/360 - - - - - - -
S - - 0.000000 % 30/360 - - - - - - -
VRR Interest 74,832,509.00 73,913,366.22 0.000000 % 30/360 214,148.36 - 19,988.43 234,136.79 - - 73,893,377.79
Total 1,496,650,164 1,478,267,309 3,247,138.89 - 399,768.64 3,646,907.53 - - 1,477,867,541
Notional
X-A 1,137,454,000 1,119,990,288 0.870218 % 30/360 812,196.57 - - 812,196.57 - (379,780.21 ) 1,119,610,508
X-B 124,409,000.00 124,409,000.00 0.541461 % 30/360 56,135.51 - - 56,135.51 - - 124,409,000.00
X-D 63,981,000.00 63,981,000.00 1.256578 % 30/360 66,997.60 - - 66,997.60 - - 63,981,000.00
X-F 26,660,000.00 26,660,000.00 1.256578 % 30/360 27,916.98 - - 27,916.98 - - 26,660,000.00
X-G 14,218,000.00 14,218,000.00 1.256578 % 30/360 14,888.36 - - 14,888.36 - - 14,218,000.00
X-H 55,095,655.00 55,095,655.00 1.256578 % 30/360 57,693.33 - - 57,693.33 - - 55,095,655.00
Total 1,421,817,655 1,404,353,943 1,035,828.35 - - 1,035,828.35 - (379,780.21 ) 1,403,974,163
Grand Total 2,918,467,819 2,882,621,252 4,282,967.24 - 399,768.64 4,682,735.88 - (379,780.21 ) 2,881,841,703
Reports Available at sf.citidirect.com v. 21.09.28 Page 2 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION SUMMARY - FACTORS
June 17, 2026
Accretion
&
Non-Cash
Other Balance
Record Interest (As Interest) Principal Total Realized Loss Increase/ Current
Class CUSIP Date Distributed Distributed Distributed Distributed /(Recovery) (Decrease) Balance
A-1 08163 MAA5 05/29/2026 0.13343182 - 19.18081869 19.31425051 - - 98.81352677
A-2 08163 MAB3 05/29/2026 2.15666664 - - 2.15666664 - - 1,000.00000000
A-3 08163 MAC1 05/29/2026 2.25250000 - - 2.25250000 - - 1,000.00000000
A-4 08163 MAD9 05/29/2026 2.01666665 - - 2.01666665 - - 1,000.00000000
A-5 08163 MAE7 05/29/2026 2.22416667 - - 2.22416667 - - 1,000.00000000
A-AB 08163 MAF4 05/29/2026 2.17916645 - - 2.17916645 - - 1,000.00000000
A-S 08163 MAH0 05/29/2026 2.41000000 - - 2.41000000 - - 1,000.00000000
B 08163 MAJ6 05/29/2026 2.29000000 - - 2.29000000 - - 1,000.00000000
C 08163 MAK3 05/29/2026 2.66250000 - - 2.66250000 - - 1,000.00000000
D 08163MAW7 U0744XAF2 05/29/2026 1.87500000 - - 1.87500000 - - 1,000.00000000
E 08163MAY3 U0744XAG0 05/29/2026 1.87499981 - - 1.87499981 - - 1,000.00000000
F 08163MBA4 U0744XAH8 05/29/2026 1.87500000 - - 1.87500000 - - 1,000.00000000
G 08163MBC0 U0744XAJ4 05/29/2026 1.87500000 - - 1.87500000 - - 1,000.00000000
H 08163MBE6 U0744XAK1 05/29/2026 1.24134380 - - 1.24134380 - - 1,000.00000000
R 08163 MBJ5 05/29/2026 - - - - - - -
S 00163 MBH9 05/29/2026 - - - - - - -
VRR Interest 08163 MBM8 05/29/2026 2.86170226 - 0.26710891 3.12881117 - - 987.45022421
X-A 08163 MAG2 05/29/2026 0.71404784 - - 0.71404784 - - 984.31277909
X-B 08163MAL1 U0744XAA3 05/29/2026 0.45121744 - - 0.45121744 - - 1,000.00000000
X-D 08163MAN7 U0744XAB1 05/29/2026 1.04714837 - - 1.04714837 - - 1,000.00000000
X-F 08163MAQ0 U0744XAC9 05/29/2026 1.04714854 - - 1.04714854 - - 1,000.00000000
X-G 08163MAS6 U0744XAD7 05/29/2026 1.04714868 - - 1.04714868 - - 1,000.00000000
X-H 08163MAU1 U0744XAE5 05/29/2026 1.04714845 - - 1.04714845 - - 1,000.00000000
Reports Available at sf.citidirect.com v. 21.09.28 Page 3 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - INTEREST DETAIL
June 17, 2026
Rate Interest Shortfall Paid
Cap
Accrual Net Accreted Non Carry Cap Carryover Carryover
Class Uncapped Capped Next Dates Accrued /Deferred Recovered Forward /Basis Risk Accrued Carry Forward /Basis Risk Total
A-1 1.35700 % 1.35700 % 1.35700 % 05/01-05/31 2,641.95 - - - - 2,641.95 - - 2,641.95
A-2 2.58800 % 2.58800 % 2.58800 % 05/01-05/31 297,727.83 - - - - 297,727.83 - - 297,727.83
A-3 2.70300 % 2.70300 % 2.70300 % 05/01-05/31 52,303.05 - - - - 52,303.05 - - 52,303.05
A-4 2.42000 % 2.42000 % 2.42000 % 05/01-05/31 433,583.33 - - - - 433,583.33 - - 433,583.33
A-5 2.66900 % 2.66900 % 2.66900 % 05/01-05/31 1,280,399.37 - - - - 1,280,399.37 - - 1,280,399.37
A-AB 2.61500 % 2.61500 % 2.61500 % 05/01-05/31 51,267.07 - - - - 51,267.07 - - 51,267.07
A-S 2.89200 % 2.89200 % 2.89200 % 05/01-05/31 342,658.62 - - - - 342,658.62 - - 342,658.62
B 2.74800 % 2.74800 % 2.74800 % 05/01-05/31 146,516.49 - - - - 146,516.49 - - 146,516.49
C 3.19500 % 3.19500 % 3.19500 % 05/01-05/31 160,889.55 - - - - 160,889.55 - - 160,889.55
D 2.25000 % 2.25000 % 2.25000 % 05/01-05/31 69,978.75 - - - - 69,978.75 - - 69,978.75
E 2.25000 % 2.25000 % 2.25000 % 05/01-05/31 49,985.62 - - - - 49,985.62 - - 49,985.62
F 2.25000 % 2.25000 % 2.25000 % 05/01-05/31 49,987.50 - - - - 49,987.50 - - 49,987.50
G 2.25000 % 2.25000 % 2.25000 % 05/01-05/31 26,658.75 - - - - 26,658.75 - - 26,658.75
H 2.25000 % 2.25000 % 2.25000 % 05/01-05/31 103,304.35 - - 36,267.15 - 68,392.65 - - 68,392.65
R 0.00000 % 0.00000 % 0.00000 % 05/01-05/31 - - - - - - - - -
S 0.00000 % 0.00000 % 0.00000 % 05/01-05/31 - - - - - - - - -
VRR Interest 0.00000 % 0.00000 % 0.00000 % 05/01-05/31 214,148.36 - - - - 214,148.36 - - 214,148.36
Total 3,282,050.59 - - 36,267.15 - 3,247,138.89 - - 3,247,138.89
Notional
X-A 0.77577 % 0.87022 % 0.87022 % 05/01-05/31 812,196.57 - - - - 812,196.57 - - 812,196.57
X-B 0.42737 % 0.54146 % 0.54146 % 05/01-05/31 56,135.51 - - - - 56,135.51 - - 56,135.51
X-D 1.14249 % 1.25658 % 1.25658 % 05/01-05/31 66,997.60 - - - - 66,997.60 - - 66,997.60
X-F 1.14249 % 1.25658 % 1.25658 % 05/01-05/31 27,916.98 - - - - 27,916.98 - - 27,916.98
X-G 1.14249 % 1.25658 % 1.25658 % 05/01-05/31 14,888.36 - - - - 14,888.36 - - 14,888.36
X-H 1.14249 % 1.25658 % 1.25658 % 05/01-05/31 57,693.33 - - - - 57,693.33 - - 57,693.33
Total 1,035,828.35 - - - - 1,035,828.35 - - 1,035,828.35
Grand Total 4,317,878.94 - - 36,267.15 - 4,282,967.24 - - 4,282,967.24
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL
June 17, 2026
Cap Carryover /
Non-Recov Shortfall Carry Forward Interest Basis Risk Shortfall
Other
Class PPIS SSRA Shortfall Prior Int. on Prior New Paid Outstanding Prior Int. on Prior New Paid Outstanding
A-1 - - - - - - - - - - - - -
A-2 - - - - - - - - - - - - -
A-3 - - - - - - - - - - - - -
A-4 - - - - - - - - - - - - -
A-5 - - - - - - - - - - - - -
A-AB - - - - - - - - - - - - -
A-S - - - - - - - - - - - - -
B - - - - - - - - - - - - -
C - - - - - - - - - - - - -
D - - - - - - - - - - - - -
E - - - - - - - - - - - - -
F - - - - - - - - - - - - -
G - - - - - - - - - - - - -
H - - - 722,904.81 1,355.45 34,911.70 - 759,171.96 - - - - -
R - - - - - - - - - - - - -
S - - - - - - - - - - - - -
VRR Interest - - - - - - - - - - - - -
Total - - - 722,904.81 1,355.45 34,911.70 - 759,171.96 - - - - -
Notional
X-A - - - - - - - - - - - - -
X-B - - - - - - - - - - - - -
X-D - - - - - - - - - - - - -
X-F - - - - - - - - - - - - -
X-G - - - - - - - - - - - - -
X-H - - - - - - - - - - - - -
Total - - - - - - - - - - - - -
Grand Total - - - 722,904.81 1,355.45 34,911.70 - 759,171.96 - - - - -
Reports Available at sf.citidirect.com v. 21.09.28 Page 5 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DISTRIBUTION INFORMATION - PRINCIPAL DETAIL
June 17, 2026
Accretion
&
Non-Cash
Balance Cumulative
Prior Principal Accreted Realized Loss Increase/ Current Realized Class % Class % Sub % Sub %
Class Balance Distributed Principal /(Recovery) (Decrease) Balance Loss Original Current Original Current
A-1 2,336,288.04 379,780.21 - - - 1,956,507.83 - 1.32 % 0.13 % 30.00 % 30.38 %
A-2 138,050,000.00 - - - - 138,050,000.00 - 9.22 % 9.34 % 30.00 % 30.38 %
A-3 23,220,000.00 - - - - 23,220,000.00 - 1.55 % 1.57 % 30.00 % 30.38 %
A-4 215,000,000.00 - - - - 215,000,000.00 - 14.37 % 14.55 % 30.00 % 30.38 %
A-5 575,676,000.00 - - - - 575,676,000.00 - 38.46 % 38.95 % 30.00 % 30.38 %
A-AB 23,526,000.00 - - - - 23,526,000.00 - 1.57 % 1.59 % 30.00 % 30.38 %
A-S 142,182,000.00 - - - - 142,182,000.00 - 9.50 % 9.62 % 20.00 % 20.25 %
B 63,981,000.00 - - - - 63,981,000.00 - 4.27 % 4.33 % 15.50 % 15.70 %
C 60,428,000.00 - - - - 60,428,000.00 - 4.04 % 4.09 % 11.25 % 11.39 %
D 37,322,000.00 - - - - 37,322,000.00 - 2.49 % 2.53 % 8.63 % 8.73 %
E 26,659,000.00 - - - - 26,659,000.00 - 1.78 % 1.80 % 6.75 % 6.84 %
F 26,660,000.00 - - - - 26,660,000.00 - 1.78 % 1.80 % 4.88 % 4.94 %
G 14,218,000.00 - - - - 14,218,000.00 - 0.95 % 0.96 % 3.88 % 3.92 %
H 55,095,655.00 - - - - 55,095,655.00 - 3.68 % 3.73 % 0.00 % 0.00 %
R - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
S - - - - - - - 0.00 % 0.00 % 0.00 % 0.00 %
VRR Interest 73,913,366.22 19,988.43 - - - 73,893,377.79 - 5.00 % 5.00 % 0.00 % 0.00 %
Total 1,478,267,309.26 399,768.64 - - - 1,477,867,540.62 - 99.98 % 100.00 %
Reports Available at sf.citidirect.com v. 21.09.28 Page 6 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
RECONCILIATION DETAIL
June 17, 2026
SOURCE OF FUNDS ALLOCATION OF FUNDS
Interest Funds Available Scheduled Fees
Scheduled Interest 4,335,703.13 Servicing Fee 6,465.03
Prepayment Interest Shortfall - Trustee/Certificate Administrator Fee 7,510.40
Interest Adjustments - Operating Advisor Fee 1,056.56
ASER Amount - Asset Representations Reviewer Ongoing Fee 318.24
Realized Loss in Excess of Principal Balance - CREFC Intellectual Property Royalty License Fee 636.50
Total Interest Funds Available 4,335,703.13 Total Scheduled Fees 15,986.73
Principal Funds Available Additional Fees, Expenses, etc.
Scheduled Principal 399,768.64 Additional Servicing Fee -
Unscheduled Principal Collections - Special Servicing Fee 14,149.31
Net Liquidation Proceeds - Work-out Fee 2,702.55
Repurchased Principal - Liquidation Fee -
Substitution Principal - Trust Fund Expenses -
Other Principal - Trust Advisor Expenses -
Reimbursement of Interest on Advances to the Servicer 19,897.30
Total Principal Funds Available 399,768.64
Borrower Reimbursable Trust Fund Expenses -
Other Funds Available
Other Expenses -
Yield Maintenance Charges -
Withdrawal of Withheld Amounts from the Interest Reserve Total Additional Fees, Expenses, etc. 36,749.16
Account -
Distributions
Deposit of Withheld Amounts to the Interest Reserve Account -
Interest Distribution 4,282,967.24
Total Other Funds Available - Principal Distribution 399,768.64
Yield Maintenance Charge Distribution -
Total Distributions 4,682,735.88
Total Funds Available 4,735,471.77
Total Funds Allocated 4,735,471.77
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
OTHER INFORMATION
Interest Reserve Account Information
June 17, 2026
Beginning Interest Reserve Account Balance 0.00
Deposit of Withheld Amounts to the Interest Reserve Account 0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account 0.00
Ending Interest Reserve Account Balance 0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding 98.745022 %
Controlling Class Information
Controlling Class is Class H.
The Controlling Class Representative is RREF IV Debt AIV, LP.
There Are No Disclosable Special Servicer Fees.
Reports Available at sf.citidirect.com v. 21.09.28 Page 8 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
June 17, 2026
Anticipated Remaining Term
Anticipated Remaining Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
60 Months or Less 5 170,630,219.64 11.55 3.3814 8 2.809381
61 to 90 Months 57 1,307,237,320.98 88.45 3.4093 65 2.655012
91 Months or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Debt Service Coverage Ratio
Debt Service Coverage Asset Ending Scheduled % of Wtd Avg
Ratio Range Count Balance Agg.Bal. WAC WAM DSCR
1.250 or Less 2 38,749,421.53 2.62 2.7696 65 0.693962
1.251 to 1.500 2 26,245,931.05 1.78 3.9262 50 1.460619
1.501 to 1.750 2 98,656,711.24 6.68 3.8878 66 1.535378
1.751 to 2.000 10 172,257,184.71 11.66 3.3579 51 1.833598
2.001 to 2.250 10 172,720,537.78 11.69 3.3929 65 2.188772
2.251 to 2.500 7 148,050,000.00 10.02 3.6921 65 2.401391
2.501 to 2.750 11 269,504,647.42 18.24 3.6243 56 2.581510
2.751 to 3.000 1 17,600,000.00 1.19 3.7600 65 2.770000
3.001 to 3.250 3 69,511,711.00 4.70 3.6229 65 3.117826
3.251 to 3.500 7 290,646,395.89 19.67 2.9577 65 3.421761
3.501 to 3.750 2 82,000,000.00 5.55 2.9073 10 3.653415
3.751 to 4.000 1 30,000,000.00 2.03 2.9900 64 3.800000
4.001 or Greater 4 61,925,000.00 4.19 3.9751 65 5.081361
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Reports Available at sf.citidirect.com v. 21.09.28 Page 9 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
June 17, 2026
Ending Schedule Balance
Ending Schedule Balance Asset Ending Scheduled % of Wtd Avg
Range Count Balance Agg.Bal. WAC WAM DSCR
1 to 5,000,000 5 15,761,224.43 1.07 3.6440 65 2.538346
10,000,001 to 15,000,000 4 50,909,647.42 3.44 3.5107 64 3.370869
15,000,001 to 20,000,000 12 212,673,266.87 14.39 3.9455 62 2.658648
20,000,001 to 25,000,000 5 112,279,591.86 7.60 3.2379 65 2.904483
25,000,001 to 30,000,000 3 87,155,579.60 5.90 2.7209 64 3.162923
30,000,001 to 35,000,000 3 98,234,010.93 6.65 3.1889 46 1.785397
35,000,001 to 40,000,000 4 157,600,000.00 10.66 3.6212 66 2.527005
40,000,001 to 45,000,000 3 125,810,844.46 8.51 3.1541 46 2.023222
45,000,001 to 50,000,000 3 143,600,000.00 9.72 3.5662 65 2.543092
5,000,001 to 10,000,000 14 105,886,663.81 7.16 3.7476 62 2.389481
50,000,001 to 55,000,000 2 108,056,711.24 7.31 3.5766 64 2.522355
55,000,001 to 60,000,000 2 114,900,000.00 7.77 3.2483 66 2.921488
60,000,001 to 65,000,000 0 0.00 0.00 0.0000 0 0.000000
65,000,001 to 70,000,000 1 70,000,000.00 4.74 2.7920 65 3.470000
70,000,001 to 75,000,000 1 75,000,000.00 5.07 2.8380 5 3.650000
75,000,001 to 80,000,000 0 0.00 0.00 0.0000 0 0.000000
80,000,001 to 85,000,000 0 0.00 0.00 0.0000 0 0.000000
85,000,000+ 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
June 17, 2026
Loan Rate
Asset Ending Scheduled % of Wtd Avg
Loan Rate Range Count Balance Agg.Bal. WAC WAM DSCR
4.00 or Less 57 1,414,473,165.44 95.71 3.3420 60 2.637504
4.01 to 4.25 1 2,400,000.00 0.16 4.1000 65 2.180000
4.26 to 4.50 3 41,019,375.18 2.78 4.3651 12 2.275438
4.51 to 4.75 0 0.00 0.00 0.0000 0 0.000000
4.76 to 5.00 0 0.00 0.00 0.0000 0 0.000000
5.01 to 5.25 0 0.00 0.00 0.0000 0 0.000000
5.26 to 5.50 0 0.00 0.00 0.0000 0 0.000000
5.51 to 5.75 0 0.00 0.00 0.0000 0 0.000000
5.76 to 6.00 1 19,975,000.00 1.35 5.8870 65 6.050000
6.01 to 6.25 0 0.00 0.00 0.0000 0 0.000000
6.26 to 6.50 0 0.00 0.00 0.0000 0 0.000000
6.51 to 6.75 0 0.00 0.00 0.0000 0 0.000000
6.76 to 7.00 0 0.00 0.00 0.0000 0 0.000000
7.01 or Greater 0 0.00 0.00 0.0000 0 0.000000
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Property Type
Asset Ending Scheduled % of Wtd Avg
Property Type Range Count Balance Agg.Bal. WAC WAM DSCR
Industrial 7 130,700,537.78 8.84 3.7216 65 2.348551
Lodging 0 0.00 0.00 0.0000 0 0.000000
Mixed Use 7 231,940,816.29 15.69 3.2162 65 2.895366
Multifamily 13 266,308,965.71 18.02 3.3389 64 2.229931
Office 14 406,412,120.74 27.50 3.2481 48 2.748986
Other 7 184,057,555.46 12.45 3.4733 52 2.474040
Retail 12 233,287,544.64 15.79 3.6793 64 3.204906
Self Storage 1 6,660,000.00 0.45 3.5100 66 2.520000
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Reports Available at sf.citidirect.com v. 21.09.28 Page 11 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
June 17, 2026
Remaining Amortization Term
Remaining Amortization Asset Ending Scheduled % of Wtd Avg
Term Range Count Balance Agg.Bal. WAC WAM DSCR
240 Months or Less 50 1,211,772,527.29 81.99 3.4482 59 2.870337
241 to 270 Months 0 0.00 0.00 0.0000 0 0.000000
271 to 300 Months 0 0.00 0.00 0.0000 0 0.000000
301 Months or Greater 12 266,095,013.33 18.01 3.2142 55 1.773427
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Seasoning
Asset Ending Scheduled % of Wtd Avg
Seasoning Range Count Balance Agg.Bal. WAC WAM DSCR
12 Months or Less 0 0.00 0.00 0.0000 0 0.000000
13 to 24 Months 0 0.00 0.00 0.0000 0 0.000000
25 to 36 Months 0 0.00 0.00 0.0000 0 0.000000
37 to 48 Months 0 0.00 0.00 0.0000 0 0.000000
49 Months or Greater 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Reports Available at sf.citidirect.com v. 21.09.28 Page 12 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
STRATIFICATION DETAIL
June 17, 2026
State
Asset Ending Scheduled % of Wtd Avg
State Range Count Balance Agg.Bal. WAC WAM DSCR
Arizona 1 55,000,000.00 3.72 3.3610 64 3.470000
California 8 145,450,000.00 9.84 3.2677 64 3.258360
Connecticut 2 94,000,000.00 6.36 3.2570 66 2.560000
Florida 3 59,150,000.00 4.00 3.8915 65 2.544658
Georgia 2 21,575,000.00 1.46 5.7789 65 5.749652
Illinois 1 42,500,000.00 2.88 3.7800 66 2.500000
Indiana 1 8,200,000.00 0.55 3.3090 66 4.810000
Kansas 1 9,830,000.00 0.67 3.8900 65 1.950000
Massachusetts 6 211,290,816.29 14.30 2.7623 64 3.105370
Michigan 2 12,700,000.00 0.86 3.6859 66 3.066142
Mississippi 1 9,019,375.18 0.61 4.3200 29 1.500000
N/A 6 191,057,555.46 12.93 3.4989 52 2.492054
New Jersey 5 175,060,566.80 11.85 2.8247 39 2.335449
New York 9 174,096,117.38 11.78 3.6114 65 2.188761
North Carolina 1 12,894,647.42 0.87 3.8080 66 2.570000
Ohio 3 32,080,000.00 2.17 3.8937 47 2.575704
Oregon 1 40,000,000.00 2.71 3.6410 66 3.110000
Rhode Island 2 58,250,000.00 3.94 3.7908 66 2.321202
Tennessee 1 6,660,000.00 0.45 3.5100 66 2.520000
Texas 3 69,473,051.49 4.70 3.8148 66 1.619937
Utah 1 30,400,000.00 2.06 4.3750 5 2.520000
Vermont 1 5,915,410.60 0.40 3.6000 65 1.160000
Virginia 1 13,265,000.00 0.90 3.1800 62 3.200000
Total 62 1,477,867,540.62 100.00 3.4060 58 2.672835
Reports Available at sf.citidirect.com v. 21.09.28 Page 13 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
MORTGAGE LOAN DETAIL
June 17, 2026
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
30508068 10 N/A 06/06/2026 3.24000 % 112,680.40 76,395.69 40,387,240.15 40,310,844.46 11/06/2026 0 0 0
30508200 11 A1 MF Harrison NJ 06/01/2026 2.45500 % 90,903.19 - 43,000,000.00 43,000,000.00 12/01/2031 0 0 0
30508148 12 MF IL 04/06/2026 3.78000 % 138,337.50 - 42,500,000.00 42,500,000.00 12/06/2031 1 98 0
30507887 13 A1 IN Town of Burrillville RI 05/06/2026 3.71000 % 127,788.89 - 40,000,000.00 40,000,000.00 12/06/2031 B 0 0
30508193 14 A1 RT Tualatin OR 06/05/2026 3.64100 % 125,412.22 - 40,000,000.00 40,000,000.00 12/05/2031 0 0 0
30320459 15 A1 IN 06/06/2026 3.85500 % 132,783.33 - 40,000,000.00 40,000,000.00 12/06/2031 0 0 0
30508186 16 MF Fort Lee NJ 06/06/2026 2.62000 % 74,176.63 44,080.37 32,878,091.30 32,834,010.93 12/06/2031 0 0 0
30508108 17 MF Kew Garden Hills NY 06/06/2026 2.47000 % 61,833.82 66,088.71 29,071,668.31 29,005,579.60 11/06/2031 0 0 0
30507803 18 OF Lehi UT 06/01/2026 4.37500 % 114,527.78 - 30,400,000.00 30,400,000.00 11/01/2026 0 0 0
30507941 19 A2 RT Concord CA 06/05/2026 2.99000 % 77,241.67 - 30,000,000.00 30,000,000.00 10/05/2031 0 0 0
30508000 20 N/A 06/06/2026 3.94000 % 55,121.48 - 16,246,711.00 16,246,711.00 11/06/2031 0 0 0
30507995 21 IN Oregon OH 06/06/2026 3.97000 % 28,647.96 - 8,380,000.00 8,380,000.00 11/06/2031 0 0 0
30508009 22 OF Beverly Hills CA 06/06/2026 2.90100 % 57,955.53 - 23,200,000.00 23,200,000.00 11/06/2031 0 0 0
30508065 23 MU New York NY 06/06/2026 3.91000 % 77,776.42 - 23,100,000.00 23,100,000.00 11/06/2031 0 0 0
30508219 24 OF Sunnyvale CA 06/06/2026 2.94800 % 53,309.67 - 21,000,000.00 21,000,000.00 12/06/2031 0 0 0
30508187 25 N/A New York NY 06/06/2026 3.67000 % 66,365.83 - 21,000,000.00 21,000,000.00 12/06/2031 0 0 0
30508028 26 A3 RT Los Angeles CA 06/06/2026 3.49000 % 60,105.56 - 20,000,000.00 20,000,000.00 10/06/2031 0 0 0
30508006 27 RT Morrow GA 06/06/2026 5.88700 % 101,260.49 - 19,975,000.00 19,975,000.00 11/06/2031 0 0 0
30508080 28 A2 RT Audubon NJ 06/06/2026 3.72000 % 55,286.13 32,382.71 17,258,938.58 17,226,555.87 08/06/2031 0 0 0
30508197 29 MH El Cajon CA 06/06/2026 3.84000 % 61,173.33 - 18,500,000.00 18,500,000.00 12/06/2031 0 0 0
30320453 2 A1 OF Greenwich CT 06/06/2026 3.25700 % 158,181.63 - 56,400,000.00 56,400,000.00 12/06/2031 0 0 0
30320454 2 A2 OF Greenwich CT 06/06/2026 3.25700 % 105,454.42 - 37,600,000.00 37,600,000.00 12/06/2031 0 0 0
30508145 30 MF North Providence RI 06/01/2026 3.96800 % 62,358.22 - 18,250,000.00 18,250,000.00 12/01/2031 0 0 0
30508188 31 N/A 06/06/2026 3.32000 % 51,460.00 - 18,000,000.00 18,000,000.00 12/06/2031 0 0 0
30508047 32 N/A 06/06/2026 3.91000 % 60,605.00 - 18,000,000.00 18,000,000.00 11/06/2031 0 0 0
30508070 33 IN Haverstraw NY 06/06/2026 3.48000 % 53,565.42 - 17,875,000.00 17,875,000.00 12/06/2031 0 0 0
30320461 34 MF Los Angeles CA 06/06/2026 3.76000 % 56,984.89 - 17,600,000.00 17,600,000.00 11/06/2031 0 0 0
30507953 35 OF Blue Ash OH 06/01/2026 3.87100 % 53,000.44 - 15,900,000.00 15,900,000.00 11/01/2028 0 0 0
30508142 36 MU Jackson Heights NY 06/06/2026 3.98000 % 51,751.06 - 15,100,000.00 15,100,000.00 12/06/2031 0 0 0
30530175 37 RT Vinton VA 06/06/2026 3.18000 % 36,323.99 - 13,265,000.00 13,265,000.00 08/06/2031 0 0 0
30508066 38 RT Gastonia NC 06/06/2026 3.80800 % 42,346.77 19,452.94 12,914,100.36 12,894,647.42 12/06/2031 0 0 0
30508049 39 OF Pomona CA 06/06/2026 3.10000 % 34,035.42 - 12,750,000.00 12,750,000.00 11/06/2031 0 0 0
Reports Available at sf.citidirect.com v. 21.09.28 Page 14 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
MORTGAGE LOAN DETAIL
June 17, 2026
Prop Paid Beginning Ending Payment Workout Mod
Type Through Gross Interest Principal Scheduled Scheduled Maturity Status Strategy Code
Loan ID OMCR (1) City State Date Coupon Payment Payment Balance Balance Date (2 ) (3 ) (4 )
30320455 3 A1 OF Plainsboro NJ 06/06/2026 2.83800 % 183,287.50 - 75,000,000.00 75,000,000.00 04/06/2031 0 0 0
30508195 40 N/A Nanuet NY 06/01/2026 3.99300 % 41,261.00 - 12,000,000.00 12,000,000.00 12/01/2031 0 0 0
30508069 41 RT Austin TX 06/06/2026 3.83900 % 31,829.16 17,329.77 9,628,260.52 9,610,930.75 12/06/2031 0 0 0
30508046 42 IN Topeka KS 06/06/2026 3.89000 % 32,927.77 - 9,830,000.00 9,830,000.00 11/06/2031 0 0 0
30508052 43 MF Jackson MS 05/06/2026 4.32000 % 33,607.89 15,004.67 9,034,379.85 9,019,375.18 11/06/2028 B 98 0
30530176 44 IN Indianapolis IN 06/06/2026 3.30900 % 23,365.22 - 8,200,000.00 8,200,000.00 12/06/2031 0 0 0
30530172 45 RT Mason OH 06/06/2026 3.85800 % 25,912.90 - 7,800,000.00 7,800,000.00 11/06/2031 0 0 8
30508007 46 OF West Palm Beach FL 06/06/2026 3.35000 % 21,779.65 - 7,550,000.00 7,550,000.00 11/06/2031 0 0 0
30530177 47 OF Houston TX 06/06/2026 3.89600 % 22,869.65 11,403.97 6,816,813.47 6,805,409.50 12/06/2031 0 0 0
30508144 48 MF Ann Arbor MI 06/01/2026 3.65000 % 22,001.39 - 7,000,000.00 7,000,000.00 12/01/2031 0 0 0
30508051 49 MF Orange NJ 06/06/2026 3.71000 % 22,363.06 - 7,000,000.00 7,000,000.00 11/06/2031 0 0 0
30507836 4 A5 OF Cambridge MA 06/05/2026 2.69250 % 81,148.96 - 35,000,000.00 35,000,000.00 10/05/2031 0 0 0
30507837 4 A6 OF Cambridge MA 06/05/2026 2.69250 % 65,266.95 - 28,150,000.00 28,150,000.00 10/05/2031 0 0 0
30508185 5 N/A 06/06/2026 3.24000 % 163,215.00 - 58,500,000.00 58,500,000.00 12/06/2031 0 0 0
30508158 50 SS TN 06/06/2026 3.51000 % 20,129.85 - 6,660,000.00 6,660,000.00 12/06/2031 0 0 0
30508073 51 IN Yonkers NY 06/06/2026 3.58000 % 19,808.89 10,123.58 6,425,661.36 6,415,537.78 12/06/2031 0 0 0
30508106 52 RT Springfield VT 06/06/2026 3.60000 % 18,372.43 11,179.52 5,926,590.12 5,915,410.60 11/06/2031 0 0 0
30508192 53 MF Southfield MI 06/06/2026 3.73000 % 18,308.08 - 5,700,000.00 5,700,000.00 12/06/2031 0 0 0
30508218 54 MF Brooklyn NY 06/06/2026 3.64000 % 12,537.78 - 4,000,000.00 4,000,000.00 12/06/2031 0 0 0
30508010 55 OF Melbourne FL 06/06/2026 3.98000 % 12,338.00 - 3,600,000.00 3,600,000.00 11/06/2031 0 0 0
30320462 56 MF Los Angeles CA 06/06/2026 4.10000 % 8,473.33 - 2,400,000.00 2,400,000.00 11/06/2031 0 0 0
30508110 57 RT Newnan GA 06/06/2026 4.43000 % 6,103.56 - 1,600,000.00 1,600,000.00 11/06/2031 0 0 0
30508191 6 OF TX 06/06/2026 3.80000 % 173,928.55 96,326.71 53,153,037.95 53,056,711.24 12/06/2031 0 8 0
30530169 7 A1 RT Tucson AZ 06/06/2026 3.36100 % 159,180.69 - 55,000,000.00 55,000,000.00 10/06/2031 0 0 0
30508159 8 A1 MF FL 06/06/2026 3.97000 % 164,093.33 - 48,000,000.00 48,000,000.00 12/06/2031 0 0 0
30508147 9 MU New York NY 06/01/2026 3.99000 % 156,674.00 - 45,600,000.00 45,600,000.00 12/01/2031 0 0 0
30320449 A-1-2 MU Cambridge MA 06/06/2026 2.79200 % 168,295.56 - 70,000,000.00 70,000,000.00 11/06/2036 0 0 0
30320450 A-1-4 MU Cambridge MA 06/06/2026 2.79200 % 120,211.11 - 50,000,000.00 50,000,000.00 11/06/2036 0 0 0
30320451 A-1-9 MU Cambridge MA 06/06/2026 2.79200 % 10,004.51 - 4,161,224.43 4,161,224.43 11/06/2036 0 0 0
30320452 A-3-3 MU Cambridge MA 06/06/2026 2.79200 % 57,652.27 - 23,979,591.86 23,979,591.86 11/06/2036 0 0 0
Total Count = 62 4,335,703.13 399,768.64 1,478,267,309.26 1,477,867,540.62
Reports Available at sf.citidirect.com v. 21.09.28 Page 15 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOI DETAIL
June 17, 2026
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
30508068 10 N/A 40,310,844.46 4,658,646.13 4,658,646.13 Not Available Not Available
30508200 11 A1 MF Harrison NJ 43,000,000.00 4,770,210.31 4,770,210.31 Not Available Not Available
30508148 12 MF IL 42,500,000.00 4,126,004.78 4,195,051.69 Not Available Not Available
30507887 13 A1 IN Town of Burrillville RI 40,000,000.00 5,785,858.14 5,785,858.14 Not Available Not Available
30508193 14 A1 RT Tualatin OR 40,000,000.00 7,416,156.66 7,416,156.66 Not Available Not Available
30320459 15 A1 IN 40,000,000.00 5,700,064.38 5,700,064.38 Not Available Not Available
30508186 16 MF Fort Lee NJ 32,834,010.93 1,005,085.12 1,005,085.12 Not Available Not Available
30508108 17 MF Kew Garden Hills NY 29,005,579.60 5,394,031.27 5,394,031.27 Not Available Not Available
30507803 18 OF Lehi UT 30,400,000.00 3,570,559.37 3,570,559.37 Not Available Not Available
30507941 19 A2 RT Concord CA 30,000,000.00 11,769,631.41 11,769,631.41 Not Available Not Available
30508000 20 N/A 16,246,711.00 2,138,052.93 2,093,940.30 Not Available Not Available
30507995 21 IN Oregon OH 8,380,000.00 752,262.37 752,262.37 Not Available Not Available
30508009 22 OF Beverly Hills CA 23,200,000.00 2,258,640.90 486,383.47 01/01/2026 03/31/2026
30508065 23 MU New York NY 23,100,000.00 2,426,593.91 2,426,593.91 Not Available Not Available
30508219 24 OF Sunnyvale CA 21,000,000.00 2,806,037.43 2,806,037.43 Not Available Not Available
30508187 25 N/A New York NY 21,000,000.00 1,229,525.59 347,710.34 01/01/2026 03/31/2026
30508028 26 A3 RT Los Angeles CA 20,000,000.00 7,279,517.15 2,022,604.84 Not Available Not Available
30508006 27 RT Morrow GA 19,975,000.00 7,845,922.88 7,845,922.88 Not Available Not Available
30508080 28 A2 RT Audubon NJ 17,226,555.87 4,063,580.32 4,063,580.32 Not Available Not Available
30508197 29 MH El Cajon CA 18,500,000.00 1,594,621.53 1,594,621.53 Not Available Not Available
30320453 2 A1 OF Greenwich CT 56,400,000.00 8,321,578.79 8,678,482.35 Not Available Not Available
30320454 2 A2 OF Greenwich CT 37,600,000.00 8,321,578.79 8,678,482.35 Not Available Not Available
30508145 30 MF North Providence RI 18,250,000.00 1,712,723.99 1,712,723.99 Not Available Not Available
30508188 31 N/A 18,000,000.00 1,630,987.62 1,630,987.62 Not Available Not Available
30508047 32 N/A 18,000,000.00 306,170.68 306,170.68 Not Available Not Available
30508070 33 IN Haverstraw NY 17,875,000.00 1,817,184.54 362,470.77 01/01/2026 03/31/2026
30320461 34 MF Los Angeles CA 17,600,000.00 1,872,278.06 1,872,278.06 Not Available Not Available
30507953 35 OF Blue Ash OH 15,900,000.00 1,858,203.18 1,858,203.18 Not Available Not Available
30508142 36 MU Jackson Heights NY 15,100,000.00 1,238,086.81 1,238,086.81 Not Available Not Available
30530175 37 RT Vinton VA 13,265,000.00 1,448,065.18 1,430,141.05 Not Available Not Available
30508066 38 RT Gastonia NC 12,894,647.42 1,854,536.66 2,029,447.31 Not Available Not Available
30508049 39 OF Pomona CA 12,750,000.00 2,035,039.11 2,211,390.67 Not Available Not Available
Reports Available at sf.citidirect.com v. 21.09.28 Page 16 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOI DETAIL
June 17, 2026
Property Ending Preceding Most Most Recent Most Recent
Type Scheduled Fiscal Recent Financial As of Financial Asof
Loan ID OMCR (1) City State Balance Year NOI NOI Start Date End Date
30320455 3 A1 OF Plainsboro NJ 75,000,000.00 25,326,230.00 22,292,078.96 04/01/2025 03/31/2026
30508195 40 N/A Nanuet NY 12,000,000.00 908,702.27 1,112,518.95 Not Available Not Available
30508069 41 RT Austin TX 9,610,930.75 1,169,937.61 1,169,937.61 Not Available Not Available
30508046 42 IN Topeka KS 9,830,000.00 757,412.40 757,412.40 Not Available Not Available
30508052 43 MF Jackson MS 9,019,375.18 901,428.41 901,428.41 Not Available Not Available
30530176 44 IN Indianapolis IN 8,200,000.00 1,484,392.18 1,484,392.18 Not Available Not Available
30530172 45 RT Mason OH 7,800,000.00 847,412.41 864,853.27 Not Available Not Available
30508007 46 OF West Palm Beach FL 7,550,000.00 833,315.83 753,767.64 Not Available Not Available
30530177 47 OF Houston TX 6,805,409.50 838,952.99 838,952.99 Not Available Not Available
30508144 48 MF Ann Arbor MI 7,000,000.00 971,152.10 971,152.10 Not Available Not Available
30508051 49 MF Orange NJ 7,000,000.00 545,119.31 535,155.34 Not Available Not Available
30507836 4 A5 OF Cambridge MA 35,000,000.00 19,252,682.36 19,252,682.36 Not Available Not Available
30507837 4 A6 OF Cambridge MA 28,150,000.00 19,252,682.36 19,252,682.36 Not Available Not Available
30508185 5 N/A 58,500,000.00 7,115,631.12 7,115,631.12 Not Available Not Available
30508158 50 SS TN 6,660,000.00 590,089.24 607,819.60 Not Available Not Available
30508073 51 IN Yonkers NY 6,415,537.78 496,163.83 579,836.89 Not Available Not Available
30508106 52 RT Springfield VT 5,915,410.60 548,648.46 548,648.46 Not Available Not Available
30508192 53 MF Southfield MI 5,700,000.00 522,672.19 522,672.19 Not Available Not Available
30508218 54 MF Brooklyn NY 4,000,000.00 333,901.05 333,901.05 Not Available Not Available
30508010 55 OF Melbourne FL 3,600,000.00 328,724.82 328,724.82 Not Available Not Available
30320462 56 MF Los Angeles CA 2,400,000.00 219,471.62 219,471.62 Not Available Not Available
30508110 57 RT Newnan GA 1,600,000.00 149,593.92 149,593.92 Not Available Not Available
30508191 6 OF TX 53,056,711.24 5,363,544.09 5,511,536.47 Not Available Not Available
30530169 7 A1 RT Tucson AZ 55,000,000.00 11,668,671.16 3,024,253.61 01/01/2026 03/31/2026
30508159 8 A1 MF FL 48,000,000.00 7,747,786.61 2,610,617.81 04/01/2025 03/31/2026
30508147 9 MU New York NY 45,600,000.00 3,026,575.59 721,857.13 01/01/2026 03/31/2026
30320449 A-1-2 MU Cambridge MA 70,000,000.00 80,093,684.00 80,093,684.00 Not Available Not Available
30320450 A-1-4 MU Cambridge MA 50,000,000.00 80,093,684.00 80,093,684.00 Not Available Not Available
30320451 A-1-9 MU Cambridge MA 4,161,224.43 80,093,684.00 80,093,684.00 Not Available Not Available
30320452 A-3-3 MU Cambridge MA 23,979,591.86 80,093,684.00 80,093,684.00 Not Available Not Available
Total Count = 62 1,477,867,540.62 550,583,065.92 523,550,131.97
Reports Available at sf.citidirect.com v. 21.09.28 Page 17 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
DELINQUENCY LOAN DETAIL
June 17, 2026
Actual Paid Current P&I Total P&I Cumulative Other Expense Payment Workout Most Recent
Principal Through Advances Advances Accrued Unpaid Advances Status Strategy Special Serv Foreclosure Bankruptcy REO
Loan ID OMCR Balance Date (Net of ASER) Outstanding Interest Advances Outstanding (2 ) (3 ) Transfer Date Date Date Date
30508148 12 42,500,000.00 04/06/2026 138,246.01 138,246.01 6.76 3,324.05 1 98 03/15/2024
30507887 13 A1 40,000,000.00 05/06/2026 127,702.78 127,702.78 - - B 0
30508052 43 9,034,379.85 05/06/2026 48,593.11 48,593.11 9.71 2,500.00 B 98 12/10/2025
Total Count = 3 91,534,379.85 314,541.90 314,541.90 16.47 5,824.05
Reports Available at sf.citidirect.com v. 21.09.28 Page 18 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL
–
June 17, 2026
Delinquent
(Does not include loans in Bankruptcy, Foreclosure, or REO)
30 Day 60 Day 90 Day 120 + Day Bankruptcy Foreclosure REO
Distribution
Date Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance Count Balance
1 42,500,000 0 0 0 0 0 0 0 0 0 0 0 0
06/17/2026
1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
05/15/2026
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 9,050,411 0 0 0 0 0 0 0 0 0 0 0 0
04/17/2026
1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 1 9,065,301 0 0 0 0 0 0 0 0 0 0
03/17/2026
0.0 % 0.0 % 1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 9,083,393 0 0 0 0 0 0 0 0 0 0 0 0
02/18/2026
1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 1 9,098,160 0 0 0 0 0 0 0 0 0 0
01/16/2026
0.0 % 0.0 % 1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 75,000,000 1 9,112,873 0 0 0 0 0 0 0 0 0 0
12/17/2025
1.6 % 0.0 % 1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
2 84,128,623 0 0 0 0 0 0 0 0 0 0 0 0
11/18/2025
3.2 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 75,000,000 0 0 0 0 0 0 0 0 0 0 0 0
10/20/2025
1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
1 75,000,000 0 0 0 0 0 0 0 0 0 0 0 0
09/17/2025
1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 0 0 0 0 0 0 0 0 0 0
08/15/2025
0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
0 0 0 0 1 75,000,000 0 0 0 0 0 0 0 0
07/17/2025
0.0 % 0.0 % 0.0 % 0.0 % 1.6 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 % 0.0 %
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
APPRAISAL REDUCTION DETAIL
June 17, 2026
Beginning Ending Appraisal Appraisal Most Recent Cumulative
Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
No Loans with Appraisal Reduction Activity.
Reports Available at sf.citidirect.com v. 21.09.28 Page 20 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL APPRAISAL REDUCTION DETAIL
June 17, 2026
Distribution Beginning Ending Appraisal Appraisal Most Recent Cumulative
Date Loan ID OMCR Property Name Scheduled Balance Scheduled Balance Reduction Amount Reduction Date ASER Amount ASER Amount
No Loans with Appraisal Reduction Activity.
Reports Available at sf.citidirect.com v. 21.09.28 Page 21 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
LOAN MODIFICATION DETAIL
June 17, 2026
Modification Modification
Loan ID OMCR Property Name Date Code (4)
30530172 45 Shoppes of Mason 04/09/2025 8
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL LOAN MODIFICATION DETAIL
June 17, 2026
Distribution Modification Modification
Date Loan ID OMCR Property Name Date Code (4)
06/17/2026 30530172 45 Shoppes of Mason 04/09/2025 8
05/15/2026 30530172 45 Shoppes of Mason 04/09/2025 8
04/17/2026 30530172 45 Shoppes of Mason 04/09/2025 8
03/17/2026 30530172 45 Shoppes of Mason 04/09/2025 8
02/18/2026 30530172 45 Shoppes of Mason 04/09/2025 8
01/16/2026 30530172 45 Shoppes of Mason 04/09/2025 8
12/17/2025 30530172 45 Shoppes of Mason 04/09/2025 8
11/18/2025 30530172 45 Shoppes of Mason 04/09/2025 8
10/20/2025 30530172 45 Shoppes of Mason 04/09/2025 8
09/17/2025 30530172 45 Shoppes of Mason 04/09/2025 8
08/15/2025 30530172 45 Shoppes of Mason 04/09/2025 8
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
SPECIALLY SERVICED LOAN DETAIL
June 17, 2026
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
30508052 43 98 5,000.00 9,019,375.18 9,034,379.85 15,300,000.00 08/27/2021 12/10/2025
30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
Total Count = 2 14,149.31 51,519,375.18 51,534,379.85 79,100,000.00
Reports Available at sf.citidirect.com v. 21.09.28 Page 24 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL SPECIALLY SERVICED LOANS
June 17, 2026
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
06/17/2026 30508052 43 98 5,000.00 9,019,375.18 9,034,379.85 15,300,000.00 08/27/2021 12/10/2025
05/15/2026 30508052 43 98 5,000.00 9,034,379.85 9,034,379.85 15,300,000.00 08/27/2021 12/10/2025
04/17/2026 30508052 43 98 5,000.00 9,050,410.93 9,083,392.93 15,300,000.00 08/27/2021 12/10/2025
03/17/2026 30508052 43 98 5,000.00 9,065,300.57 9,112,873.00 15,300,000.00 08/27/2021 12/10/2025
02/18/2026 30508052 43 98 5,000.00 9,083,392.93 9,112,873.00 15,300,000.00 08/27/2021 12/10/2025
01/16/2026 30508052 43 98 5,000.00 9,098,160.33 9,143,222.29 15,300,000.00 08/27/2021 12/10/2025
06/17/2026 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
05/15/2026 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
04/17/2026 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
03/17/2026 30508148 12 98 8,263.89 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
02/18/2026 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
01/16/2026 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
12/17/2025 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
11/18/2025 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
10/20/2025 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
09/17/2025 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
08/15/2025 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
07/17/2025 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
06/17/2025 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
05/16/2025 30508148 12 9 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
04/17/2025 30508148 12 9 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
03/17/2025 30508148 12 9 8,263.89 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
02/18/2025 30508148 12 9 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
01/17/2025 30508148 12 9 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
12/17/2024 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
11/18/2024 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
10/18/2024 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
09/17/2024 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
08/16/2024 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
07/17/2024 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
06/17/2024 30508148 12 98 9,149.31 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
05/17/2024 30508148 12 98 8,854.17 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
Reports Available at sf.citidirect.com v. 21.09.28 Page 25 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL SPECIALLY SERVICED LOANS
June 17, 2026
Special Servicing Ending Ending Most Most Recent Most Recent Most Recent
Distribution Workout Fee Amount Scheduled Actual Recent Valuation Special Servicer Master Servicer
Date Loan ID OMCR Strategy (3) Plus Adjustments Balance Balance Value Date Transfer Date Return Date
04/17/2024 30508148 12 98 6,493.06 42,500,000.00 42,500,000.00 63,800,000.00 10/14/2021 03/15/2024
11/18/2024 30508191 6 8 11,838.31 54,900,532.35 54,900,532.35 85,670,000.00 06/23/2023 11/06/2024
10/18/2024 30508191 6 98 11,476.39 54,990,845.34 54,990,845.34 85,670,000.00 06/23/2023
09/17/2024 30508191 6 98 11,878.25 55,086,659.51 55,086,659.51 85,670,000.00 06/23/2023
08/16/2024 30508191 6 98 11,897.49 55,176,365.44 55,176,365.44 85,670,000.00 06/23/2023
07/17/2024 30508191 6 98 11,533.48 55,265,778.79 55,265,778.79 85,670,000.00 06/23/2023
06/17/2024 30508191 6 98 11,937.05 55,360,725.09 55,360,725.09 85,670,000.00 06/23/2023
05/17/2024 30508191 6 98 11,571.65 55,449,537.14 55,449,537.14 85,670,000.00 06/23/2023
04/17/2024 30508191 6 98 11,976.36 55,543,903.37 55,543,903.37 85,670,000.00 06/23/2023
03/15/2024 30508191 6 98 11,223.76 55,632,117.98 55,632,117.98 85,670,000.00 06/23/2023
02/16/2024 30508191 6 98 12,016.67 55,731,772.09 55,819,373.95 85,670,000.00 06/23/2023
01/18/2024 30508191 6 98 12,035.47 55,819,373.95 55,819,373.95 85,670,000.00 06/23/2023
12/15/2023 30508191 6 98 11,666.59 55,906,690.10 55,906,690.10 85,670,000.00 06/23/2023
11/17/2023 30508191 6 98 12,074.14 55,999,613.25 55,999,613.25 85,670,000.00 06/23/2023
10/17/2023 30508191 6 98 11,703.90 56,086,341.54 56,086,341.54 85,670,000.00 06/23/2023
09/15/2023 30508191 6 98 12,112.57 56,178,697.59 56,178,697.59 85,670,000.00 06/23/2023
08/17/2023 30508191 6 98 12,131.05 56,264,841.78 56,350,705.01 85,670,000.00 06/23/2023
07/17/2023 30508191 6 98 5,095.48 56,350,705.01 56,442,226.55 85,670,000.00 06/23/2023
Reports Available at sf.citidirect.com v. 21.09.28 Page 26 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
UNSCHEDULED PRINCIPAL DETAIL
June 17, 2026
Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL UNSCHEDULED PRINCIPAL DETAIL
June 17, 2026
Distribution Liquidation / Liquid / Prepay Principal Principal Prepayment Interest Prepayment Yield Maintenance
Date Loan ID OMCR Prepayment Date Code (5) Collections Adjustments Excess / (Shortfall) Penalties (PPP) Penalties (YM)
No Loans with Unscheduled Principal Activity to Report.
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
LIQUIDATED LOAN DETAIL
June 17, 2026
Beginning Most Liquidation Net Net Realized Date of Loss with
Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 29 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
HISTORICAL LIQUIDATED LOAN
June 17, 2026
Beginning Most Liquidation Net Net Realized Date of Loss with
Distribution Scheduled Recent Sales Proceeds Liquidation Proceeds Loss to Current Current Cumulative Cumulative
Date Loan ID OMCR Balance Value Price Received Expense Available Trust Adj. to Loan Adj. to Loan Adj. to Loan Adj. to Trust
No Loans liquidated to Report.
Reports Available at sf.citidirect.com v. 21.09.28 Page 30 of 32 © Copyright 2026 Citigroup

Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
CREFC® INVESTOR REPORTING PACKAGE LEGENDS
June 17, 2026
1|CREFC Investor Reporting Package Legends
Property Type (1) Workout Strategy (3) Liquidation/Prepayment Code (5)
MF Multifamily 1 Modification 1 Partial Liquidation (Curtailment)
RT Retail 2 Foreclosure 2 Payoff Prior To Maturity
HC HealthCare 3 Bankruptcy 3 Disposition / Liquidation
IN Industrial 4 Extension 4 Repurchase / Substitution
MH Mobile Home Park 5 Note Sale 5 Full Payoff At Maturity
OF Office 6 DPO 6 DPO
MU Mixed Use 7 REO 7 Liquidation prior to 7/1/2006
LO Lodging 8 Resolved 8 Payoff With Penalty
SS Self Storage 9 Pending Return to Master Servicer 9 Payoff With Yield Maintenance
SE Securities 10 Deed In Lieu of Foreclosure 10 Curtailment With Penalty
CH Cooperative Housing 11 Full Payoff 11 Curtailment With Yield Maintenance
ZZ Missing Information 12 Reps and Warranties
SF SF 13 TBD
WH Warehouse 98 Other
OT Other
Modification Code (4)
Payment Status of Loan (2)
1 Maturity Date Extension
A In Grace Period 2 Amortization Change
B Late, but less than 30 Days 3 Principal Write-Off
0 Current 4 Blank (formerly Combination)
1 30-59 Days Delinquent 5 Temporary Rate Reduction
2 60-89 Days Delinquent 6 Capitalization of Interest
3 90-120 Days Delinquent 7 Capitalization of Taxes
4 Performing Matured Balloon 8 Other
5 Non Performing Matured Balloon 9 Combination
6 121+ Days Delinquent 10 Forbearance
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Benchmark 2021-B31 Mortgage Trust
Commercial Mortgage Pass Through Certificates, Series 2021-B31
NOTES
June 17, 2026
No Notes available for this deal at this time.
Reports Available at sf.citidirect.com v. 21.09.28 Page 32 of 32 © Copyright 2026 Citigroup
Benchmark 2021-B31 Mortgage Trust published this content on July 01, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on July 01, 2026 at 20:26 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]