Washington Self-Employment Tax Calculator Tax Year 2026
Calculate your federal self-employment tax, income tax, and Washington state tax on freelance income.
Washington has no state income tax, so self-employed Washington residents only need to worry about federal self-employment tax (15.3%) and federal income tax. Washington has no state income tax on earned income, making it ideal for freelancers. Note that a 7% capital gains tax applies to long-term gains exceeding $278,000. The state has a relatively high sales tax.
Use the calculator below to estimate your total tax burden as a self-employed Washington resident for the 2026 tax year.
New to the 2026 tax changes? Read our OBBBA guide →
SALT (state income tax + property tax) is capped at $40,400 for 2026 under OBBBA — up from
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This calculator estimates your federal self-employment tax, federal income tax, and state tax.
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Tax Breakdown
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Federal Income Tax Brackets
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Washington Freelancer Tax Guide for 2026
No Washington State Income Tax for Freelancers
Washington has no personal state income tax on wages or self-employment income. Combined with no corporate income tax, this makes WA one of the most tax-friendly states for high-earning freelancers — particularly tech consultants, developers, and Seattle-area knowledge workers earning $200K+ where comparable California or Oregon residents pay 9–13% in state tax.
Washington Business & Occupation (B&O) Tax
Washington imposes a B&O tax on gross receipts of businesses, which does apply to most freelancers. Rates vary by activity classification: 1.75% for "Service & Other Activities" with under $5 million in income (the bucket most consultants and freelancers fall into); 2.1% for service businesses over $5 million in income (effective October 1, 2025); 0.484% for retailing; 0.471% for wholesaling. Beginning January 1, 2026, businesses with more than $250 million in annual taxable income owe an additional 0.5% surcharge on top of regular B&O. The state's annual B&O filing threshold is $125,000 in gross receipts — under that, you generally don't need to register or file. The Small Business B&O Credit further reduces tax for service-classified filers up to $160/month (phasing out as tax due exceeds $160 and zeroing at $320). Seattle separately raised its city B&O exemption from $100,000 to $2 million effective January 1, 2026, removing most freelancers from city B&O entirely. Even if your credit zeros out your state liability, you must still file.
Washington Capital Gains Tax
WA's 7% capital gains tax (enacted 2021, upheld by the WA Supreme Court in 2023) was restructured for 2026 into a tiered rate: 7% on the first $1 million of long-term gains above the standard deduction, and 9.9% on amounts above $1 million. The standard deduction is approximately $285,000 for 2026 (up from $278,000 in 2025), indexed annually. The tax affects freelancers selling appreciated stock, real estate, or business assets — but does not apply to ordinary self-employment income. Real estate transactions, retirement accounts, and certain qualified small business stock are excluded.
Quarterly Federal Estimated Payments
WA freelancers make no state income tax estimates (no income tax) but must pay federal quarterly estimates on the standard schedule (April 15, June 15, September 15, January 15) using Form 1040-ES. Seattle imposes a "JumpStart" payroll expense tax on businesses with payroll above $7M and high-comp employees, but this rarely applies to solo freelancers.
Frequently Asked Questions: Washington Freelancer Taxes
How is self-employment tax calculated in Washington for 2026?
Self-employment tax is a federal 15.3% tax on 92.35% of your net self-employment earnings (12.4% Social Security up to $184,500 for 2026 + 2.9% Medicare with no cap). It is the same in every state. Washington freelancers pay this on top of federal income tax (no state income tax in Washington).
What state taxes do freelancers pay in Washington?
Washington has no state income tax on freelance or self-employment income. You only owe federal taxes — self-employment tax (15.3%) and federal income tax — on your net earnings.
Do I need to make quarterly estimated tax payments in Washington?
Yes, if you expect to owe $1,000 or more in federal taxes for 2026, you must make quarterly estimated payments to the IRS. The 2026 federal due dates are April 15, June 15, September 15, and January 15, 2027.
What deductions can Washington freelancers claim in 2026?
Federal deductions for self-employed include the QBI deduction (up to 20% of qualified business income, made permanent under OBBBA), the deductible half of self-employment tax, self-employed health insurance premiums, retirement plan contributions (SEP IRA, Solo 401(k)), home office deduction, and ordinary business expenses.
How This Calculator Works
- Self-employment tax: Net income × 92.35% × 15.3% (12.4% Social Security + 2.9% Medicare). Social Security capped at $184,500 for 2026.
- Half-SE deduction: 50% of SE tax deducted before income tax.
- QBI deduction: Up to 20% of qualified business income (OBBBA permanent).
- Federal income tax: 2026 progressive brackets after standard deduction and above-the-line deductions.
- State tax (Washington): Applied to total income using Washington’s 2026 rates.
- Quarterly payments: Total tax ÷ 4. Due: April 15, June 15, September 15, January 15.