Washington Quarterly Tax Calculator 2026
Rates reviewed · Washington Department of Revenue
Washington has no personal income tax. However, the B&O tax on gross receipts applies to service businesses earning over $12,000/year.
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Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.
Washington quarterly tax questions
How much is the quarterly tax for freelancers in Washington?
Freelancers in Washington pay federal self-employment tax (15.3% of net self-employment income) and federal income tax at their bracket. Washington has no state income tax, so there is no state quarterly payment.
When are quarterly estimated taxes due in Washington for 2026?
Washington follows the federal estimated tax schedule for 2026 — Q1: April 15, 2026, Q2: June 16, 2026, Q3: September 15, 2026, Q4: January 15, 2027. The Q3 payment is due September 15, 2026.
What happens if I underpay estimated taxes in Washington?
The IRS charges an underpayment penalty based on the amount underpaid and the number of days late. Paying at least 90% of this year's tax or 100% of last year's (110% if your AGI exceeded $150,000) meets the federal safe harbour.
Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.