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Washington

Washington Capital Gains Tax Calculator

Calculate your 2026 capital gains tax in Washington. Washington taxes capital gains at rates up to 9.9%, plus federal taxes.

Sale Details

Original purchase price

Renovations, additions — added to your basis

Agent commissions, closing costs, title & transfer fees

Washington Tax Estimate

Total Tax

$33,800

16.9% effective rate

Capital Gain

$200,000

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Tax Breakdown

Sale Price$500,000
Cost Basis-$300,000
Capital Gain$200,000
Federal Tax-$33,800
↳ Includes NIIT (3.8%)$3,800
Washington State Tax$0
Net Cash to You$466,200

Sale price minus selling costs and all taxes (before any mortgage payoff).

Federal

$33,800

WA State

$0

Effective Rate

16.9%

Washington Capital Gains Tax

Washington has no income tax but levies a capital gains excise tax on long-term gains: 7% on gains above the standard deduction and 9.9% on taxable gains above $1 million (the 2.9% tier started in tax year 2025). The calculator uses the $278,000 standard deduction for 2025; Washington publishes the inflation-adjusted 2026 amount by October 31, 2026. Short-term gains are not taxed.

Long-term: 7% above the $278,000 standard deduction (2025 amount); 9.9% on taxable gains above $1 million

Short-term: Not taxed

NIIT Applied

The 3.8% Net Investment Income Tax applies because your income exceeds $200,000.

Washington Capital Gains Tax Details

Tax Treatment

  • Tax Type

    Separate capital gains rate

  • Maximum Rate

    9.9%

Available Exemptions

  • Standard deduction of $278,000 (2025 amount, adjusted for inflation each year); spouses share one deduction
  • Real estate is exempt
  • Assets held in retirement accounts are exempt
  • Short-term gains are not taxed

Washington Capital Gains Tax FAQ

Official References

This calculator provides estimates. Consult a tax professional for advice specific to your situation in Washington.

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Jupid AI Accountant helps Washington residents track investment income and calculate capital gains taxes automatically.