Quick Answer
Washington's 7% capital gains tax applies to investment gains over $250,000 per year. If you sold stocks for a $300,000 gain in 2026, you'd owe $3,500 Washington tax (7% on the $50,000 above the threshold). The tax doesn't apply to retirement accounts or primary home sales.
Best Answer
Sarah Chen, Payroll Tax Analyst
W-2 employees with investment accounts, stock compensation, or significant asset sales
How Washington's 7% capital gains tax works
Washington's capital gains tax is 7% on long-term capital gains above $250,000 per year. This threshold applies per individual, not per household, so married couples filing separately can each claim the $250,000 exemption.
The tax only applies to gains from selling assets you've held for more than one year — stocks, bonds, business interests, and other investments. It doesn't apply to your primary residence, retirement accounts (401k, IRA, Roth IRA), or short-term gains (assets held less than one year).
Example: $75,000 salary employee with stock gains
Let's say you work at Microsoft, earn $75,000 annually, and sold company stock in 2026:
You'd also owe federal capital gains tax (likely 15% for most middle-income earners), but Washington has no state income tax on your W-2 wages.
What counts as capital gains for Washington tax
Subject to Washington capital gains tax:
Exempt from Washington capital gains tax:
Key factors affecting your Washington capital gains tax
Comparison: Washington vs. other state capital gains taxes
What you should do
1. Track your cost basis: Keep detailed records of purchase prices and dates for all investments
2. Plan your sales timing: Consider spreading large gains across multiple tax years to stay under the $250,000 threshold
3. Use tax-loss harvesting: Realize capital losses to offset gains in the same year
4. Consider the total tax picture: Factor in both federal capital gains tax (0-20%) and Washington's 7% when making investment decisions
Use our paycheck calculator to see how capital gains affect your overall tax situation when combined with your W-2 income.
Key takeaway: Washington's 7% capital gains tax only applies to investment gains above $250,000 per year. Most employees with modest investment portfolios won't owe this tax, but those with significant stock compensation or large asset sales should plan carefully.
*Sources: [Washington Department of Revenue - Capital Gains Tax](https://dor.wa.gov/taxes-rates/other-taxes/capital-gains-tax), [IRS Publication 544](https://www.irs.gov/pub/irs-pdf/p544.pdf)*
Key Takeaway: Washington's 7% capital gains tax only affects investment gains above $250,000 per year, with the first $250,000 completely exempt from state tax.
Comparison of Washington capital gains tax with other states
| State | Capital Gains Tax Rate | Annual Threshold | Notes |
|---|---|---|---|
| Washington | 7% | $250,000+ gains | First $250k exempt |
| California | Up to 13.3% | $0 | No threshold, highest rate |
| New York | Up to 8.82% | $0 | No threshold |
| Texas | 0% | N/A | No state income tax |
| Federal | 0%, 15%, or 20% | Based on income | Separate from state |
More Perspectives
Sarah Chen, Payroll Tax Analyst
New Washington residents or people considering a move to Washington for tax planning
Washington residency and capital gains tax timing
If you moved to Washington recently, the capital gains tax applies based on your Washington residency status when you sell the asset, not when you bought it. This creates both opportunities and complications for tax planning.
Example: Moving to Washington for tax benefits
Say you lived in California (13.3% capital gains tax) and moved to Washington in 2025:
This is significantly better than California's potential tax of ~$40,000 on the same gain.
Residency requirements and timing
Washington considers you a resident for capital gains tax purposes if you're domiciled in Washington when the sale occurs. Key factors:
What new Washington residents should know
Moving to Washington purely for tax avoidance requires genuine residency establishment — not just a mailing address.
Key takeaway: New Washington residents can benefit from the state's favorable capital gains treatment, but must establish genuine residency and understand that only gains above $250,000 face the 7% state tax.
Key Takeaway: New Washington residents can benefit from the state's favorable capital gains treatment compared to high-tax states like California, potentially saving tens of thousands on large investment sales.
Sarah Chen, Payroll Tax Analyst
Employees with significant RSU grants, stock options, or executive compensation packages
Managing stock compensation under Washington's capital gains tax
For employees with substantial stock compensation — RSUs, stock options, ESPP shares — Washington's capital gains tax requires strategic planning around vesting schedules and sale timing.
RSU considerations
Remember that RSU vesting is taxed as ordinary income (subject to federal and Social Security taxes, but not Washington state tax since WA has no income tax). Only the additional gain after vesting is subject to capital gains treatment.
Example: Tech employee with large RSU grant
Stock option timing strategies
With stock options, you have more control over timing. Consider:
ESPP planning
Employee Stock Purchase Plan shares have complex tax treatment. The discount portion is taxed as ordinary income, while post-purchase appreciation gets capital gains treatment. Plan ESPP sales carefully to optimize the Washington capital gains impact.
Key takeaway: Employees with significant stock compensation should coordinate vesting schedules, exercise timing, and sale planning to minimize Washington's 7% capital gains tax on amounts above $250,000 annually.
Key Takeaway: Stock compensation requires careful timing strategies to manage Washington's capital gains tax, especially when RSU vestings or option exercises could push annual gains above the $250,000 threshold.
Sources
- Washington Department of Revenue - Capital Gains Tax — Official Washington State capital gains tax guidance
- IRS Publication 544 — Sales and Other Dispositions of Assets
Reviewed by Sarah Chen, Payroll Tax Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.