Washington state has no income tax -- making it one of the most tax-friendly states for tech employees with equity compensation. But Washington is no longer a pure zero-tax state. Since 2022, a 7% capital gains tax applies to gains exceeding $270,000, and the Washington Supreme Court upheld this tax in 2023.
For the tens of thousands of Amazon, Microsoft, Meta, and Google employees in the Seattle area, this capital gains tax creates a new planning dimension that didn't exist a few years ago. RSU vesting income remains untaxed, but large stock sales can trigger a significant state-level bill.
Washington Has No State Income Tax
Like Texas, Washington imposes zero state income tax on wages, salaries, and ordinary income. This is straightforward and well-established:
- RSU vesting income: $0 state tax
- ISO exercises: $0 state tax (and no state AMT)
- Stock option exercises: $0 state tax
- Bonuses: $0 state tax
- Salary: $0 state tax
There is no supplemental withholding rate, no state brackets, and no state income tax return to file.
Washington Capital Gains Tax: 7% on Gains Over $270,000
The major exception to Washington's no-tax status is the capital gains tax, which took effect in 2022 and was upheld by the Washington Supreme Court in Quinn v. State of Washington (2023).
Key details:
| Feature | Detail |
|---|---|
| Tax rate | 7% |
| Standard deduction | $270,000 per individual |
| Applies to | Sales of stocks, bonds, and other capital assets |
| Does NOT apply to | Real estate, retirement accounts, small business sales (certain conditions) |
| Filing threshold | Only if you have capital gains exceeding $270,000 |
| First effective year | 2022 |
The $270,000 deduction is per individual, not per transaction. If you make multiple stock sales throughout the year totaling more than $270,000 in net gains, the 7% tax applies to the amount exceeding $270,000. Married couples filing jointly each get their own $270,000 deduction only if they each individually realize gains.
What Counts as "Capital Gains" for This Tax?
The Washington capital gains tax applies specifically to gains from the sale or exchange of capital assets. This is a critical distinction for equity compensation:
Subject to the 7% tax (if above $270K threshold):
- Selling stock that has appreciated above your cost basis
- Selling RSU shares at a price above the vesting price (post-vesting appreciation)
- ISO qualifying disposition gains (long-term capital gains portion)
- Selling any stocks, bonds, or other financial assets at a gain
NOT subject to the 7% tax:
- RSU vesting income (this is ordinary income, not a capital gain)
- ISO exercise spread (this is an AMT preference item or ordinary income, not a capital gain)
- NSO exercise spread (ordinary income)
- Salary, bonuses, and other W-2 income
RSU vesting is not a capital gains event. When your RSUs vest, the income is classified as ordinary W-2 income -- not capital gains. Washington's capital gains tax does not apply. The tax only becomes relevant if you hold the shares after vesting and later sell them at a higher price. The gain from vesting price to sale price is a capital gain.
Filing the Washington Capital Gains Tax
If your capital gains exceed $270,000 in a calendar year, you must file a Washington Capital Gains Tax Return.
Filing requirements:
| Detail | Information |
|---|---|
| Who must file | Anyone with WA-sourced capital gains exceeding $270,000 |
| Filing deadline | April 15 (same as federal return) |
| Where to file | Washington Department of Revenue (online or paper) |
| Payment due | April 15 with the return |
| Extension | 6-month automatic extension for filing (not payment) |
| Form | Washington Capital Gains Excise Tax Return |
Key compliance notes:
- This is separate from your federal return -- you file it with the Washington Department of Revenue, not the IRS
- If you're below $270,000 in total capital gains, you do not need to file anything with Washington
- Gains from selling your primary residence are exempt (same as the federal $250K/$500K exclusion)
- Gains from retirement accounts (401k, IRA) are exempt
- Short-term and long-term capital gains are both counted toward the $270,000 threshold
Washington calls this an "excise tax" rather than an income tax. This classification was central to the state Supreme Court ruling that upheld the tax, since Washington's constitution prohibits a graduated income tax. Regardless of the label, the practical effect is a 7% tax on capital gains above $270,000.
How the Capital Gains Tax Affects Tech Employees
Let's walk through the scenarios most relevant to Washington tech employees:
Scenario 1: RSU Vesting with Immediate Sale (Sell-to-Cover)
Most employees sell RSU shares immediately at vesting (or have shares sold automatically to cover taxes). In this case:
- The vesting income is ordinary income: no WA capital gains tax
- The sale price equals the vesting price: no capital gain, no WA tax
Result: $0 Washington tax. This is the most common scenario, and it's completely tax-free at the state level.
Scenario 2: Holding RSU Shares After Vesting
Suppose you hold 1,000 RSU shares that vested at $180/share. Two years later, you sell at $220/share.
| Amount | |
|---|---|
| Vesting price (cost basis) | $180/share |
| Sale price | $220/share |
| Capital gain per share | $40/share |
| Total capital gain | $40,000 |
| WA capital gains deduction | $270,000 |
| WA capital gains tax | $0 (gain below threshold) |
With $40,000 in gains, you're well under the $270,000 threshold. No Washington tax applies.
Scenario 3: Large Stock Sale Exceeding $270K Threshold
Now suppose you're a long-tenured Amazon or Microsoft employee with a large accumulated stock position. You sell $800,000 worth of stock with a $200,000 cost basis.
| Amount | |
|---|---|
| Sale proceeds | $800,000 |
| Cost basis | $200,000 |
| Total capital gain | $600,000 |
| WA capital gains deduction | $270,000 |
| Taxable gain for WA | $330,000 |
| WA capital gains tax (7%) | $23,100 |
$23,100 in Washington state tax on a single stock sale. For employees who have accumulated large positions over many years, this tax can be significant. The key planning strategy is spreading sales across multiple years to stay below or minimize exposure above the $270,000 threshold.
Scenario 4: ISO Qualifying Disposition
If you exercised ISOs, held the shares for the required period (2 years from grant, 1 year from exercise), and sell at a gain, the gain above the exercise price is a long-term capital gain. If this gain exceeds $270,000, Washington's 7% tax applies to the excess.
Cost Basis Tracking for RSU Shares
If you hold RSU shares from multiple vesting events, each vest creates a separate tax lot with a different cost basis. Choosing which lots to sell can significantly affect your Washington capital gains tax.
Example: 4 quarterly vests at different prices
| Vest Date | Shares | FMV (Cost Basis) |
|---|---|---|
| Q1 2024 | 500 | $150/share |
| Q2 2024 | 500 | $160/share |
| Q3 2024 | 500 | $170/share |
| Q4 2024 | 500 | $180/share |
Total position: 2,000 shares. Current price: $220/share. You want to sell 1,000 shares.
FIFO (First In, First Out) -- default method:
- Sells Q1 + Q2 lots: basis = $150 + $160 = avg $155
- Capital gain = (1,000 x $220) - (500 x $150 + 500 x $160) = $220,000 - $155,000 = $65,000
- Below $270K threshold: $0 WA tax
Specific identification -- highest basis first:
- Sells Q4 + Q3 lots: basis = $180 + $170 = avg $175
- Capital gain = (1,000 x $220) - (500 x $180 + 500 x $170) = $220,000 - $175,000 = $45,000
- Below $270K threshold: $0 WA tax
In this example, both methods stay under the $270K threshold. But for larger positions, the difference matters enormously. If you're selling 5,000 shares at $220 with a $150 average basis, FIFO produces $350K in gains (triggering $5,600 in WA tax) while specific identification using highest-basis lots could reduce gains below $270K.
You must designate specific shares at the time of sale. To use specific identification, instruct your broker which lots to sell before the trade executes. After the fact, your broker defaults to FIFO. Most major brokerages (Schwab, Fidelity, E-Trade) let you select lots online when placing the order.
Holding RSU Shares: WA Tax Implications
The Washington capital gains tax creates a trade-off that didn't exist before 2022: sell at vesting or hold for potential appreciation?
Strategy A: Sell immediately at vesting
- Washington capital gains tax: $0 (no gain above vesting price)
- Federal tax: ordinary income at vesting (withheld by employer)
- Risk: none (no stock concentration)
Strategy B: Hold for 2+ years, stock appreciates 50%
Suppose 2,000 shares vest at $180/share ($360K total). Two years later, stock is at $270/share.
| Amount | |
|---|---|
| Sale proceeds | $540,000 |
| Cost basis (vesting price) | $360,000 |
| Capital gain | $180,000 |
| WA deduction | $270,000 |
| WA taxable gain | $0 |
| WA capital gains tax | $0 |
With $180K in gains, you're still under the $270K threshold. But the gain would be taxed federally at long-term capital gains rates (0/15/20%) instead of ordinary income rates -- a potential federal savings of 12-17% on the appreciation.
Strategy C: Hold for 2+ years, stock doubles
Same 2,000 shares vest at $180, stock reaches $360/share.
| Amount | |
|---|---|
| Sale proceeds | $720,000 |
| Cost basis | $360,000 |
| Capital gain | $360,000 |
| WA deduction | $270,000 |
| WA taxable gain | $90,000 |
| WA capital gains tax (7%) | $6,300 |
Now you owe $6,300 to Washington. But the federal benefit of long-term capital gains rates on $360K of appreciation (15% vs. say 35% ordinary) saves roughly $72,000. The $6,300 WA tax is a small price for the federal savings -- if you're confident in the stock.
Washington's unique structure: Unlike California and New York (which tax capital gains as ordinary income at rates up to 13.3% and 10.9%), Washington only taxes gains above $270K at a flat 7%. For most RSU holders who sell-to-cover at vesting, Washington is effectively a zero-tax state. The 7% tax only becomes relevant for large concentrated stock positions.
Major Washington Tech Employers
Washington is home to some of the largest tech employers in the world, all of which grant significant equity compensation:
- Amazon (Seattle/Bellevue) -- RSUs are the primary equity vehicle
- Microsoft (Redmond) -- RSUs and ESPP
- Meta (Seattle/Bellevue) -- RSUs
- Google (Seattle/Kirkland) -- RSUs
- Boeing (Everett/Renton) -- RSUs and stock options
- Expedia (Seattle) -- RSUs
- Zillow (Seattle) -- RSUs
- Stripe (Seattle) -- RSUs and options at various stages
For employees at these companies, the no-income-tax advantage on RSU vesting is substantial. The capital gains tax only becomes relevant for those holding large appreciated positions.
Washington vs. California vs. New York for Equity Compensation
| Feature | Washington | California | New York |
|---|---|---|---|
| Income tax on RSU vesting | 0% | Up to 13.3% | Up to 10.9% (+ 3.876% NYC) |
| Income tax on ISO exercise | 0% | Ordinary income rates | 0% (federal conformity) |
| State AMT | No | Yes (7%) | No |
| Capital gains tax | 7% over $270K | Up to 13.3% (ordinary rates) | Up to 10.9% (ordinary rates) |
| Supplemental withholding rate | N/A | 10.23% | 11.70% |
Example: $200K salary + $150K RSU vesting, single filer
| Tax Component | Washington | California | New York |
|---|---|---|---|
| Federal income tax | $86,128 | $86,128 | $86,128 |
| State income tax | $0 | ~$14,250 | ~$10,275 |
| FICA | $13,083 | $13,083 | $13,083 |
| Total tax | $99,211 | $113,461 | $109,486 |
| Savings vs. WA | -- | ~$14,250 | ~$10,275 |
The savings are identical to Texas because both states have zero income tax on RSU vesting. The difference appears when you sell appreciated stock above the $270K threshold.
Planning Tips for Washington Tech Employees
1. Sell-to-cover is tax-efficient in WA. If you don't have a strong conviction to hold your employer's stock, selling at vesting avoids the capital gains tax entirely (no gain above vesting price) and eliminates concentration risk.
2. Spread large sales across years. If you need to liquidate a large stock position, selling $270K or less in gains per year keeps you under the WA capital gains threshold. A $600K total gain spread across 3 years means $200K/year in gains -- all below the $270K deduction.
3. Track your cost basis carefully. RSU shares have a cost basis equal to the FMV on the vesting date. If you hold shares from multiple vesting events, you have multiple cost basis lots. Choosing which lots to sell (specific identification method) can help minimize gains in any given year.
4. ISO exercise timing doesn't affect WA taxes. Since Washington has no income tax and no state AMT, ISO exercises carry zero state tax consequence. Focus your exercise planning entirely on federal AMT optimization using our ISO AMT Calculator.
5. Plan federal estimated taxes. Just like Texas, the federal withholding shortfall is your primary tax challenge. Your employer withholds 22% on RSU vesting, but your actual rate may be 32-37%. Use our RSU Calculator to see your exact shortfall, and make quarterly estimated payments to avoid penalties. See our estimated taxes on RSU income guide and our quarterly estimated tax guide for all equity types.
6. Watch the $270K threshold if you're selling appreciated stock. This is the one area where Washington differs from Texas. If you're planning a large stock sale, model the 7% tax and consider whether splitting the sale across years makes sense.
For a comparison across all states, see our State Income Tax Guide. For federal planning, see the 2026 Federal Tax Brackets guide and our RSU tax rate guide. For details on federal withholding gaps, see our RSU tax withholding guide and our guide on how RSUs are taxed.
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Try Calculator →Frequently Asked Questions
Does Washington have state income tax? No. Washington has no state income tax on wages, salaries, bonuses, RSU vesting income, or stock option exercises. Your employer withholds zero for Washington state income tax. However, since 2022, Washington imposes a 7% capital gains tax on the sale of stocks, bonds, and other capital assets when gains exceed $270,000 in a calendar year.
What is the Washington capital gains tax? Washington's capital gains tax is a 7% tax on net capital gains exceeding $270,000 per year (the standard deduction). It was enacted in 2021, took effect in 2022, and was upheld by the Washington Supreme Court in 2023. It applies to gains from selling stocks, bonds, and financial assets but does not apply to real estate sales, retirement account distributions, or small business sales (under certain conditions).
Do RSUs trigger the Washington capital gains tax? RSU vesting itself does not trigger the capital gains tax because vesting income is classified as ordinary W-2 income, not a capital gain. However, if you hold RSU shares after vesting and later sell them at a price higher than the vesting price, the gain from vesting price to sale price is a capital gain. If your total capital gains for the year exceed $270,000, the 7% tax applies to the excess.
How do I track cost basis for RSU shares in Washington? Each RSU vesting event creates a separate tax lot with a cost basis equal to the fair market value on the vesting date. If you hold shares from multiple vests, you have multiple lots with different cost bases. When selling, you can choose which lots to sell using specific identification (selecting higher-basis lots to minimize gains) or default to FIFO (first in, first out). You must designate specific lots at the time of sale through your broker.
Is the WA capital gains tax constitutional? Yes, as of the 2023 Washington Supreme Court ruling in Quinn v. State of Washington. The court classified it as an excise tax on the privilege of selling capital assets rather than a tax on income. Washington's constitution prohibits a graduated income tax, but the court ruled the capital gains tax is not an income tax. The ruling is final at the state level, though some legal commentators still debate the classification.
When do I owe the WA capital gains tax on stock sales? The tax is due April 15 of the following year, the same deadline as your federal tax return. You file a separate Washington Capital Gains Tax Return with the Washington Department of Revenue (not the IRS). If your total capital gains for the year are below $270,000, you do not need to file anything with Washington. A 6-month extension is available for filing but not for payment.
Tax Disclaimer: This content is for educational purposes only. Always consult with a licensed tax professional or certified public accountant before making financial decisions related to equity compensation, tax planning, or investment strategies.