Whether you pay state tax on capital gains depends entirely on where you live and, sometimes, where the asset sits. About 40 states fold capital gains into ordinary income and tax them at rates between roughly 2.5% and 13.3%. Nine states charge nothing. Two states, Washington and Massachusetts, use their own specialized structures. And every state layer stacks on top of federal capital gains tax, which is where the real bill usually starts.
The Default Rule in Most States
Roughly 40 states treat a capital gain the same as a paycheck. They start with your federal adjusted gross income or federal taxable income, then run it through their own brackets. Sell stock, a rental, or a business interest at a profit, and the gain gets added to your salary and taxed at whatever rate your combined income lands in.
Top marginal rates in 2026 run from 2.5% in Arizona and North Dakota up to 13.3% in California. Some states use one flat rate for all income; others use graduated brackets. That structure matters when a gain is large: the extra income can push your last dollars of ordinary earnings into a higher bracket too, not just the gain itself.
A handful of states offer small deductions or credits against investment income, but these are usually capped and phase out at higher incomes. For most taxpayers in most states, the calculation is straightforward: add the net gain to the rest of your income, apply the state’s rate, and pay that on top of what you owe the IRS.
States That Don’t Tax Capital Gains
Nine states impose no individual income tax, so capital gains skip state taxation entirely: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. New Hampshire is the newest on the list. Its interest and dividends tax, phased down from 5% over several years, was fully repealed effective January 1, 2025.1New Hampshire Department of Revenue Administration. Repeal of NH Interest and Dividends Tax Now in Effect
Washington belongs on the list with a caveat. It has no broad income tax on wages, but it does apply a capital gains excise tax to certain high-value investment sales. For most residents with ordinary portfolios, Washington still functions as a no-tax state; large stock sales are the exception.
Living in one of these states cuts state filing out of the picture for investment income. You still owe federal capital gains tax on any profitable sale. If you recently moved to a no-tax state, keep thorough residency documentation. Maintaining ties to a former state, or selling property located there, can still create a state tax claim on the gain.
States With Their Own Capital Gains Rules
Two states step outside the ordinary-income model and apply structures that need their own explanation.
Washington’s Capital Gains Excise Tax
Washington levies a 7% excise tax on long-term capital gains from the sale of stocks, bonds, and similar financial assets. It only applies above a standard deduction that started at $250,000 in the statute and adjusts for inflation each year; the 2025 deduction was $278,000. Starting January 1, 2025, an additional 2.9% surcharge applies to the portion of an individual’s gains above $1,000,000, bringing the combined rate on that slice to 9.9%.2Washington State Legislature. Washington Code 82.87.040 – Tax Imposed – Long-Term Capital Assets
Real estate sales are exempt, as are gains from retirement accounts and certain interests in privately held businesses. In practice, a Washington resident selling $400,000 of stock only owes the 7% rate on the amount above the standard deduction, and a smaller portfolio may generate no bill at all.
Massachusetts Short-Term, Long-Term, and Surtax
Massachusetts splits capital gains into buckets. Long-term gains on most assets held longer than a year are taxed at the standard 5% income tax rate. Short-term gains on assets held one year or less are taxed at 8.5%, nearly double. Long-term gains on collectibles face a 12% rate, though a 50% deduction reduces the effective bite.3Mass.gov. Massachusetts Tax Rates
On top of those rates, Massachusetts adds a 4% surtax on taxable income above an annually adjusted threshold. For 2025 that threshold was $1,083,150.4Mass.gov. Massachusetts 4% Surtax on Taxable Income A taxpayer whose wages plus capital gains cross that line pays the extra 4% on every dollar above it. On a large stock sale, the effective state rate on the gain can climb well above 9%.
Selling Property in a State Where You Don’t Live
Moving to a no-tax state doesn’t necessarily protect a gain on property you own elsewhere. When you sell real estate or a business interest located in another state, that state generally has the right to tax the gain as source income. Live in Florida, sell a rental in California, and California taxes the profit at its rates regardless of where you file your primary return.
Many states enforce this with mandatory withholding at closing. The buyer or closing agent pulls a percentage of either the sale price or the estimated gain and sends it to the state’s revenue department. Rates vary, but they commonly land between 3% and 7% of the gross sale price. The withheld amount counts as an estimated payment; when you file a non-resident return, you reconcile it against your actual liability and either owe more or get a refund.
This setup can create a double-tax risk. If your home state also taxes capital gains, both states may claim the same gain. Most states offer a credit for taxes paid to another jurisdiction, but the credit doesn’t always make you whole. For investors with property in more than one state, this is where planning matters.
The Federal Tax That Stacks On Top
State capital gains tax never runs alone. Federal tax hits the same gain, and the combined bill is what determines your actual net proceeds.
For 2026, federal long-term capital gains rates are 0%, 15%, or 20%, based on taxable income. A single filer pays 0% on gains up to $49,450 in taxable income, 15% between $49,451 and $545,500, and 20% above that. Married couples filing jointly hit the 20% bracket above $613,700. Short-term gains on assets held a year or less are taxed at ordinary federal rates, which reach 37%.
Higher earners also pay the 3.8% net investment income tax on the lesser of their net investment income or the amount by which modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers. Those thresholds aren’t indexed for inflation, so more taxpayers cross them each year.5Internal Revenue Service. Questions and Answers on the Net Investment Income Tax
Stacked together, the numbers get steep. A high-income California resident selling long-term stock can face a combined rate above 37%: 20% federal, 3.8% net investment income tax, and 13.3% state. A Texas resident on the same gain owes only the federal portion. That gap is why residency planning gets serious attention before a large asset sale.
Estimated Payments on a Large Gain
A big capital gain mid-year can trigger estimated tax obligations at both the federal and state level. Federally, estimated payments are generally required if you expect to owe at least $1,000 after withholding and refundable credits, and your withholding and credits will cover less than 90% of the current year’s tax or 100% of the prior year’s tax (110% if your prior-year AGI exceeded $150,000).6Internal Revenue Service. Large Gains, Lump Sum Distributions, Etc.
Most states with an income tax mirror those requirements with similar thresholds. Sell a highly appreciated asset in the second quarter, and you generally need to make an estimated payment for that quarter rather than waiting until you file. Missing the deadline draws interest and underpayment penalties from both the IRS and the state. On a six-figure gain, those add up fast.
The IRS lets you annualize income, concentrating your estimated payment in the quarter the gain actually happened instead of spreading it evenly across four quarters.6Internal Revenue Service. Large Gains, Lump Sum Distributions, Etc. Many states allow the same. For a one-time windfall, annualizing can cut penalty exposure substantially compared with equal installments.
How to Figure Out What You Owe Your State
Start with the cost basis of the asset. Basis is what you originally paid, adjusted for things like capital improvements to real estate, reinvested dividends on stock, or broker commissions. Subtract basis from sale price and the difference is your gain. If you inherited the asset, basis is generally the fair market value on the date of the previous owner’s death, not what they paid, which can shrink the taxable amount considerably.
Then check the holding period. Owned more than a year, the gain is long-term. A year or less, it’s short-term. That distinction matters federally and in states like Massachusetts that split their rates by holding period.
Most states that tax capital gains use federal adjusted gross income as the starting point. You carry AGI or federal taxable income from Form 1040 to the state form, then apply state-specific adjustments. Some states don’t recognize certain federal deductions or depreciation methods, which can produce a different state gain than federal gain. Reading your state’s instructions before filing prevents surprises.
Most states also conform to the federal home-sale exclusion: up to $250,000 of gain ($500,000 for married couples filing jointly) on a primary residence you owned and lived in for at least two of the five years before sale. Because state calculations usually start from federal AGI, the excluded gain never appears on the state return. A few states add their own wrinkles, so confirm with your state’s revenue department if you’re selling a home with a large gain.
State tax forms are available on each state’s revenue department or tax commission website. Most ask you to transcribe information from federal Schedule D into state fields. Filing accurately and on time avoids the interest and penalty charges states assess on late or underpaid returns.