Tax & Payroll
Washington State Capital Gains Tax Calculator
Estimate Washington's excise tax on long-term capital gains: 7%, plus 2.9% above $1 million.
Preparing your result…
What this calculator does
Estimates WA capital gains excise tax.
What your result means
Tax at 7% and 9.9% tiers.
Formula
Taxable = max(0, gains − standard deduction − other deductions); tax = 7% × min(taxable, $1M) + 9.9% × max(0, taxable − $1M)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- G
- WA long-term gains
- • User enters the year's inflation-adjusted standard deduction.
Sources and review
Reviewed 2026-09-23 · Next review 2027-01-15
- • Allocation rules not checked.
- • Rules change annually.
- • Educational estimate, not tax advice.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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