Washington state income tax calculator

Washington does not levy a state income tax. This confirms your state tax is $0.

How this calculator works

Step 1 starts with the Washington taxable income you already calculated on your return. If you are a part-year resident or nonresident, the tool applies the Washington income percentage you provide to focus on Washington-source income.

Step 2 confirms Washington has no state income tax, so the estimated tax remains $0.

Step 3 summarizes the effective and marginal rates so you can see how additional income would be taxed and whether your current estimate matches your expectations.

Frequently asked questions

What income should I enter?

Use Washington taxable income from your return. If you only know total income, estimate deductions first or use the standard deduction tool.

Do part-year residents prorate income?

Yes. Use the Washington income allocation percentage from your return to prorate taxable income, but the state tax remains $0 because Washington does not levy income tax.

Does Washington have income tax brackets?

No. Washington does not have a personal income tax, so there are no brackets by filing status.

Is this tax advice?

No. This tool provides estimates based on the inputs you provide and is not legal or tax advice.

Washington does not levy a personal income tax. This tool is informational, not legal or tax advice.