Capital gains tax due April 15, 2024
The capital gains tax return and payment are due April 15, 2024. Individuals can file using certain tax preparation software or Department of Revenue’s online filing system, MyDOR.
Filing extensions
Individuals must request an extension for their state capital gains return by the due date and receive a filing extension for their federal income tax return to be entitled to the same filing extension for their Washington capital gains tax return.
A filing extension does not extend the due date for paying the capital gains tax due. Payments are due April 15, 2024.
Late returns and payments
Penalties will apply to late returns. Additional penalties and interest will apply to late payments.
How-to videos and additional resources
Check out these capital gains tax resources available on our website:
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