What's Happening?
The Washington Department of Revenue has added a new special notice, "Prepayment of capital gains tax," to its Special Notices listing, with an issue date of 08/03/2026. This notice appears under the Capital gains subject category on the DOR's Special Notices page.
This is a newly published notice — it was not previously listed — so businesses and individuals subject to Washington's capital gains tax should review it directly to understand any prepayment procedures, deadlines, or requirements it establishes.
Key Highlights
- Notice title: Prepayment of capital gains tax
- Subject category: Capital gains
- Issue date: 08/03/2026
- Source: DOR Special Notices — Prepayment of capital gains tax
Context
This notice joins a growing body of DOR guidance on Washington's capital gains tax, including an earlier notice from 12/03/2025 on new documentation requirements for sales or exchanges of long-term capital assets. Taxpayers making estimated or advance payments toward capital gains tax liability should confirm whether this new notice changes existing prepayment mechanics, timing, or documentation standards.
Because the full text of the notice was not available in our monitoring data, we recommend verifying the specific prepayment rules, applicable deadlines, and any thresholds directly on the DOR page before making filing or payment decisions.
Next Steps
If your business makes capital gains tax payments in Washington or advises clients who do, now is the time to review this notice closely and confirm how it affects your current filing and payment practices. Contact Washington Tax Desk at info@washingtontaxdesk.com for help interpreting this update and applying it to your specific situation.