CALCMONEY // CAPITAL GAINS // WA
Washington adds 9.9% state tax on top of the 23.8% federal rate. On a $1M gain, total tax: $337,000.
Calculate Your Gain9.9%
33.7%
$168,500
$337,000
| Tax Component | Rate | On $500K Gain | On $1M Gain |
|---|---|---|---|
| Federal Long-Term Rate | 20.0% | $100,000 | $200,000 |
| Net Investment Income Tax (NIIT) | 3.8% | $19,000 | $38,000 |
| Washington State Tax | 9.9% | $49,500 | $99,000 |
| Total Tax Owed | 33.7% | $168,500 | $337,000 |
| Net Proceeds (after tax) | $331,500 | $663,000 |
Federal rate assumes income in the 20% long-term bracket. NIIT applies to investors with MAGI above $200K (single) or $250K (married). State rate shown is the top applicable rate.
| Gain Amount | WA Total Tax | Zero-Tax State | WA Premium |
|---|---|---|---|
| $250,000 | $84,250 | $59,500 | +$24,750 |
| $500,000 | $168,500 | $119,000 | +$49,500 |
| $1,000,000 | $337,000 | $238,000 | +$99,000 |
| $2,500,000 | $842,500 | $595,000 | +$247,500 |
| $5,000,000 | $1,685,000 | $1,190,000 | +$495,000 |
Washington taxes long-term capital gains at up to 9.9%. Combined with the 20% federal rate and 3.8% NIIT, a high-income WA investor faces 33.7% on a large capital event. On a $1M gain, that is $337,000 in total tax, leaving $663,000 after tax.
Washington's 7% capital gains tax applies only to long-term gains above $278,000 (2025 threshold, adjusted annually for inflation). Gains from real estate, retirement accounts, and certain farms are exempt.
The difference between realizing a gain in Washington versus a zero-tax state like Texas or Florida is $99,000 per $1M in gains. For a $5M exit, the gap is $495,000. Domicile planning is a key lever for HNW investors ahead of a major liquidity event.
The NIIT adds 3.8% on top of the federal rate for investors with Modified Adjusted Gross Income above $200,000 (single) or $250,000 (married filing jointly). This threshold is not indexed to inflation, so it captures most HNW capital gain transactions regardless of state.
| Alaska | None |
| Florida | None |
| Nevada | None |
| New Hampshire | None |
| South Dakota | None |
| California | 13.3% |
| Hawaii | 11.0% |
| New York | 10.9% |
| New Jersey | 10.8% |
| District of Columbia | 10.8% |
New Hampshire
No state tax
CACalifornia
13.3% state rate
HIHawaii
11.0% state rate
COColorado
4.4% state rate