Washington State Department of Revenue
03/25/2026 | Press release | Distributed by Public on 03/25/2026 09:07
Capital Gains Excise Tax returns due date moved to May 1, 2026
OLYMPIA, Wash. - March 25, 2026 - Tax Year 2025 Capital Gains tax returns and payments are due May 1, 2026.
The Internal Revenue Service (IRS) has extended tax filing and payment deadlines to May 1, 2026 for Washington state residents and businesses affected by severe storms and flooding that began Dec. 9, 2025. For convenience, the April 15, 2026 due date for all Washington Capital Gains tax returns and payments has been extended to May 1, 2026 for the 2025 filing year only.
Filing extensions
Individuals must request an extension for their state capital gains return by May 1, 2026, and receive a filing extension for their federal income tax return to be entitled to a filing extension. The extended filing deadline is Oct. 15, 2026.
A filing extension does not extend the due date for paying the capital gains tax due. Payments are due May 1, 2026.
Washington State Department of Revenue published this content on March 25, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on March 25, 2026 at 15:07 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 If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]