Washington Personal Tax Extension 2026: 2025 Tax-Year Filing Guide
Federal Individual Income Tax · IRS Form 1040
This guide explains the Washington personal tax extension for the 2025 tax year. Washington has no individual income tax or state extension requirement. Federal filing and payment rules still apply. For federal filing details, see our federal tax extension resources.
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Washington has no individual income tax. Use IRS Form 4868 for a federal extension; federal tax remains due April 15, 2026.
Washington Personal Tax Extension: Filing Details
Washington has no individual income tax, so there is no Washington return deadline or state extension period.
The federal extension applies to filing time only. Pay any balance due by April 15 to limit penalties and interest.
Quick Reference: Deadlines and Forms
Use this summary to confirm Washington residents’ federal filing deadlines and payment requirements.
| Item | Washington personal return | Deadline or method |
|---|---|---|
| Original deadline | Federal Form 1040 | April 15, 2026 |
| Extended deadline | Federal extension with Form 4868 | October 15, 2026 |
| Return forms | Federal Form 1040, Federal Form 1040, Federal Form 1040 | Use IRS Form 1040 for your federal return |
| Payment form | IRS Form 4868 | No Washington state payment due |
Frequently Asked Questions
Answers about Washington personal tax extensions. Confirm current rules with the Internal Revenue Service.
Visit IRS.gov →Most individuals receive an automatic Washington extension and do not need to submit a separate extension form. The extension moves the filing deadline to October 15, 2026, but payment remains due April 15, 2026. For business filings, see our Washington business tax extension page.
Use Federal Form 1040, Federal Form 1040, or Federal Form 1040 based on your filing status and residency. The Internal Revenue Service instructions for each form explain who should use it.
No. Federal tax is due by April 15, 2026. Pay through IRS Direct Pay or use the applicable payment method to limit penalties and interest.
For most 2025 calendar-year individual returns, the Washington extended filing deadline is October 15, 2026. Check the current IRS.gov individual filing guidance if your circumstances differ.