Estimate your self-employment tax in Seattle for 2026: the 15.3% SE tax, the deductible half, federal income tax, and quarterly payments.
Last updated: May 2026 · Data: MIT Living Wage Calculator, C2ER, U.S. Census, BLS, IRS, state and city sources
Seattle self-employed workers pay federal SE tax and federal income tax, but no Washington state income tax. Washington has no state income tax on wages or salaries. However, the state enacted a 7% tax on long-term capital gains exceeding $270,000 in 2022 (upheld by the state Supreme Court). Washington has one of the highest sales tax rates in the nation.
| Net Profit | SE Tax | Half-SE Deduction | Total Est. Tax | Per Quarter |
|---|---|---|---|---|
| $30,000 | $4,239 | $2,119 | $5,546 | $1,387 |
| $50,000 | $7,065 | $3,532 | $10,602 | $2,651 |
| $75,000 | $10,597 | $5,299 | $17,545 | $4,386 |
| $100,000 | $14,130 | $7,065 | $26,189 | $6,547 |
| $150,000 | $21,194 | $10,597 | $43,898 | $10,975 |
Single filer, standard deduction. Total tax = SE tax + federal income tax. Estimates only.
Seattle is the largest city in the Pacific Northwest, home to Amazon and Microsoft (nearby), a major cloud-computing and technology cluster, aerospace ties to Boeing, the Port of Seattle, global health philanthropy, and a strong coffee and retail heritage.
| Local Metric | Seattle (2026 estimate) |
|---|---|
| Metro population | 750,000 |
| County / jurisdiction | King County |
| Cost of living index (US avg = 100) | 151 |
| MIT living wage, single adult | $27.00/hour |
| MIT living wage, one earner supporting a family of four | $52.00/hour |
| Applicable minimum wage | $20.29/hour |
| Average rent, 1-bedroom | $2,200/month |
| Average rent, 2-bedroom | $2,900/month |
| Median home price | $850,000 |
| Median household income | $116,000/year |
| Combined sales tax rate | 10.35% |
| Effective property tax rate | 0.92% of value/year |
Local figures are 2026 estimates compiled from the MIT Living Wage Calculator, the C2ER Cost of Living Index, U.S. Census and Zillow housing data, and city and county sources. Verify current figures before relying on them.
The federal SE tax rate is 15.3% (12.4% Social Security plus 2.9% Medicare), the same in Seattle as everywhere. It applies to 92.35% of net profit; Social Security stops at $176,100 of net earnings.
Washington has no state income tax, so self-employment income earned in Seattle is not subject to state tax, only federal SE and income tax.
On $60,000 of net profit in Seattle, estimated total tax (SE plus federal) is about $13,131, or roughly $3,283 per quarter.
Seattle does not levy a local self-employment or income tax. Washington has no corporate income tax but levies a Business & Occupation (B&O) tax on gross receipts, and Seattle adds its own city B&O tax and business license. Budget for the state and city B&O taxes and the Washington LLC fees on top of the state filing fee.
Business expenses that lower net profit (equipment, software, home office, mileage) reduce both SE tax and income tax. The deductible half of SE tax, self-employed health insurance, and retirement contributions reduce income tax.