PiggySelf-Employment Tax in Washington (2026)
Washington has no tax on wage or self-employment income, so your freelance profit escapes state income tax entirely. Two things still reach you: the federal 15.3% self-employment tax, which no state can waive, and Washington's 7% tax on long-term capital gains above an annual threshold, which catches people who sell investments rather than people who invoice.
The federal part is the same everywhere
Self-employment tax replaces the payroll taxes an employer would otherwise split with you. As a freelancer you pay both halves: 12.4% for Social Security, on earnings up to the $184,500 wage base, and 2.9% for Medicare with no cap. Together that is 15.3%, charged on 92.35% of your net profit rather than all of it.
At $100,000 of net profit that comes to $14,129.55 in Washington — exactly as it would in any other state. Moving does not change this number.
What Washington adds
Washington does not tax wage or self-employment income, so your invoicing income is not touched at the state level. The state does tax long-term capital gains above an annual threshold at 7%, which matters if you sell stock or a business rather than if you send invoices. Businesses may also fall under the state's Business & Occupation tax, which is charged on gross receipts rather than profit — worth checking against your own situation.
What the two look like together
| Net profit | Federal SE tax | Washington income tax* | SE tax as % of profit | Combined |
|---|---|---|---|---|
| $40,000 | $5,651.82 | $0.00 | 14.1% | $5,651.82 |
| $75,000 | $10,597.16 | $0.00 | 14.1% | $10,597.16 |
| $120,000 | $16,955.46 | $0.00 | 14.1% | $16,955.46 |
* No state income tax applies to freelance profit.
Quarterly payments
If you expect to owe $1,000 or more in federal tax for the year, the IRS expects estimated payments four times a year rather than one bill in April. Missing them triggers an underpayment penalty even if you settle in full at filing. The safe harbor rule is the way out: pay 90% of this year's liability or 100% of last year's, and the penalty does not apply.
Frequently asked questions
Do I pay self-employment tax if I live in Washington?
Yes. Self-employment tax is federal. Washington not having a state income tax makes no difference to it — you still owe 15.3% on 92.35% of your net profit once that profit reaches $400 for the year.
So what do I actually owe as a freelancer in Washington?
Federal self-employment tax plus federal income tax. There is no state income tax line. That usually means a lower total bill than in most states, but the self-employment portion is unchanged.
Do I still need to make quarterly payments in Washington?
Yes, to the IRS. If you expect to owe $1,000 or more in federal tax for the year, quarterly estimated payments apply the same as anywhere else. You just have no state estimated payment to make alongside them.
Work out your own numbers
- Self-Employment Tax Calculator — the federal 15.3%, exactly.
- Quarterly Tax Calculator — enter your state rate for a combined figure.
- Safe Harbor Calculator — the minimum to pay to avoid a penalty.
- Home Office Deduction — every deduction cuts SE tax too.
- All states compared — the full table.