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Tax dates

The federal dates most individuals and small businesses need for the coming year. When a date falls on a weekend or holiday, it moves to the next working day.

Federal tax dates

Q4 2026

  1. Fourth-quarter estimated tax for corporationsC corporations

Q1 2027

  1. Fourth-quarter estimated tax payment for 2026Individuals and the self-employed
  2. W-2s and 1099-NEC to workers and the IRS; fourth-quarter Form 941Employers and anyone who paid contractors
  3. Partnership and S corporation returns, or their extensionPartnerships and S corporations

Q2 2027

  1. Personal and C corporation returns, or their extension; first-quarter estimated taxIndividuals and C corporations
  2. Second-quarter estimated taxIndividuals, the self-employed and corporations

Q3 2027

  1. Extended partnership and S corporation returns; third-quarter estimated taxPartnerships, S corporations and anyone paying estimates

Q4 2027

  1. Extended personal returnsIndividuals who filed an extension

General dates; yours may differ with a fiscal year, a disaster extension or a special situation.

Washington's own filings

Washington has no personal income tax, so there is no state return for most individuals. Businesses file the combined excise tax return for B&O and sales tax monthly, quarterly or yearly, as the Department of Revenue assigns, usually by the 25th of the month after the period. Employers also file quarterly reports for unemployment insurance, Paid Family and Medical Leave and workers' compensation.

Missed a date?

File and pay as soon as you can: penalties and interest grow each month. If you cannot pay in full, the IRS offers payment plans, and we can set one up with you.

This page is general information about US and Washington taxes, not tax advice for your situation. Tax rules change every year; a meeting is where we look at yours.

Tax forms, a calculator and a calendar laid out on a desk

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