If you sell stock, real estate, or a business, the federal capital gains tax is only part of the picture. Depending on where you live, your state may tax those gains as ordinary income, apply a preferential rate, impose a standalone excise tax, or charge nothing at all. The differences can add up to tens of thousands of dollars on a single transaction.
Federal Capital Gains: The Baseline
Before layering on state taxes, here's where federal rates stand for 2026:
Long-term capital gains (assets held over one year):
| Taxable Income (Single) | Rate |
|---|
| Up to $48,350 | 0% |
| $48,351 – $533,400 | 15% |
| Over $533,400 | 20% |
Short-term capital gains (assets held one year or less) are taxed at ordinary income rates — up to 37% federally.
The Net Investment Income Tax (NIIT) adds an additional 3.8% on investment income for individuals with modified AGI above $200,000 (single) or $250,000 (MFJ). This applies regardless of which state you live in.
How States Treat Capital Gains
State approaches fall into four broad categories.
Category 1: Taxed as Ordinary Income (The Majority)
Most states with an income tax treat capital gains exactly like wages, salaries, and other ordinary income. There's no preferential rate — gains are simply added to your taxable income and taxed at whatever bracket they fall into.
This includes many of the highest-tax states:
| State | Top Marginal Rate (applied to cap gains) |
|---|
| California | 13.3% |
| New York | 10.9% (+ NYC surcharge up to 3.876%) |
| New Jersey | 10.75% |
| Oregon | 9.9% |
| Minnesota | 9.85% |
| Connecticut | 6.99% |
| Hawaii | 11.0% |
| Vermont | 8.75% |
For a high-income investor in California, the combined federal + state + NIIT rate on long-term gains can reach 37.1% (20% + 13.3% + 3.8%). In New York City, it's even higher at roughly 34.7% before the city surcharge pushes it above 38.5%.
Category 2: Preferential Rates or Partial Exclusions
A smaller number of states offer some relief for capital gains, either through reduced rates or partial exclusions:
- Arkansas: Excludes 50% of net capital gains from taxable income
- Montana: Offers a capital gains credit of up to 2% for certain qualifying gains
- Wisconsin: Excludes 30% of net capital gains on assets held more than one year (for farm assets, 60%)
- South Carolina: Deducts 44% of net capital gains
- Colorado: Offers exclusions for gains on qualifying Colorado small business stock
These preferential treatments don't make state capital gains tax disappear, but they can meaningfully reduce the effective rate. A South Carolina investor in the top bracket effectively pays about 3.9% instead of the nominal 6.5% top rate on long-term gains.
Category 3: No Capital Gains Tax
The nine states with no individual income tax automatically have no capital gains tax either: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, and Wyoming.
Washington is a special case — covered below.
For investors, these states offer the simplest path to minimizing state-level capital gains tax. The combined rate on long-term gains is just the federal 20% (at the top bracket) plus 3.8% NIIT — a total of 23.8% with no state layer.
Category 4: Washington's Standalone Capital Gains Tax
Washington doesn't have a broad income tax, but it does impose a 7% excise tax on the sale of stocks, bonds, and other capital assets when gains exceed approximately $262,000 in a year (indexed for inflation). The tax was upheld by the Washington Supreme Court in 2023, which classified it as an excise tax rather than an income tax.
Key details:
- Applies only to gains above the ~$262K threshold
- Excludes real estate, retirement accounts, livestock, and certain small business sales
- No deduction for capital losses below the threshold
- Married couples filing jointly share a single threshold (not doubled)
For a Washington resident selling $500,000 in stock gains, the state tax is roughly $16,660 (7% × $238,000 above the threshold). Combined with the federal 20% + 3.8% NIIT, the total rate on the amount above the threshold is 30.8%.
Combined Federal + State Rates: A Comparison
Here's the maximum combined long-term capital gains rate for selected states (assuming top federal bracket + NIIT):
| State | State Rate | Combined Rate (Fed + State + NIIT) |
|---|
| California | 13.3% | 37.1% |
| New York (+ NYC) | 14.8% | 38.6% |
| New Jersey | 10.75% | 34.55% |
| Oregon | 9.9% | 33.7% |
| Minnesota | 9.85% | 33.65% |
| Hawaii | 11.0% | 34.8% |
| Massachusetts | 9.0% (5% + 4% surtax) | 32.8% |
| Washington | 7.0% (above threshold) | 30.8% |
| Texas / Florida | 0% | 23.8% |
The spread between California and Texas is 13.3 percentage points — on a $1 million long-term gain, that's a $133,000 difference in state tax alone.
Massachusetts: The Millionaire Surtax on Capital Gains
Massachusetts deserves special mention. In November 2022, voters approved a 4% surtax on income exceeding $1 million, including capital gains. This pushed the effective top rate on high capital gains from 5% to 9%. A business owner selling a company for $5 million in Massachusetts faces a state tax bill that's $160,000 higher than it would have been before the surtax.
The surtax threshold is indexed for inflation, but the structure means a single large capital gains event — selling a business, a large stock position, or investment property — can trigger the surtax even for taxpayers who don't earn $1 million in a typical year.
Planning Considerations
Timing of Gains
If you're planning a significant asset sale, the year you close matters. This is particularly relevant if you're near the Massachusetts $1M threshold, Washington's ~$262K threshold, or if you're considering a state residency change.
State Residency Changes
Moving from a high-tax state to a no-income-tax state before realizing a large gain is a well-known strategy — and one that states actively scrutinize. California, New York, and others have aggressive residency audit programs. Simply changing your driver's license isn't enough. You typically need to establish genuine domicile: selling or leasing your former home, moving your personal and professional life, and spending the majority of your time in the new state.
Opportunity Zones
Federal Opportunity Zone deferrals and exclusions remain available and can reduce capital gains tax regardless of state. Investing gains into a Qualified Opportunity Fund defers the original gain and, if held for 10 years, eliminates tax on the appreciation of the Opportunity Zone investment itself. State treatment of Opportunity Zones varies — some conform to the federal rules, others don't.
Installment Sales
Spreading a gain over multiple tax years through an installment sale can keep you in lower federal brackets and potentially below state surtax thresholds (like Massachusetts's $1M threshold or Washington's ~$262K threshold).
The Bottom Line
The state you live in can add anywhere from 0% to over 14% to your capital gains tax rate. For anyone with significant investment income, business sale proceeds, or real estate gains, the state layer isn't an afterthought — it's a major variable. Use the TaxMath calculator to model your specific scenario across states before making decisions.
This article is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional for guidance specific to your situation.