The 2026 investor’s guide to capital gains tax: Federal rates and state-by-state rules.

Capital gains tax in 2026: How US investors could be affected by federal and state taxes

Capital against tax in 2026 remains a major consideration for US investors because federal long-term capital gains rates can reach 20%, while state taxes can substantially increase the effective burden, particularly in California, New York, New Jersey and Massachusetts.

The federal tax treatment of investment gains remains structured around 0%, 15% and 20% long-term capital gains rates, with the applicable rate determined by taxable income and filing status. Investors may also face the 3.8% net investment income tax when modified adjusted gross income exceeds statutory thresholds.

State treatment varies considerably, with California generally taxing capital gains as ordinary income and New York and New Jersey applying their individual income-tax systems to investment gains. Massachusetts has a distinctive system that includes a 5% rate on long-term capital gains and an additional 4% surtax once taxable income exceeds its 2026 threshold.

This guide explains how federal and state capital gains taxes work in 2026 and why investors in high-tax states need to consider both systems before selling appreciated assets.

Key Takeaways

Federal long-term capital gains rates for 2026 are generally 0%, 15% and 20%.
Short-term gains are generally taxed at ordinary federal income-tax rates.
The 3.8% Net Investment Income Tax can increase the federal burden for higher-income investors.
California, New York, New Jersey and Massachusetts can impose significant additional state taxes.
Tax-loss harvesting and careful timing can materially affect an investor’s after-tax return.

How capital gains tax works in 2026

Capital gains tax applies when an investor disposes of a capital asset for more than its adjusted tax basis. Stocks, bonds, mutual funds, exchange-traded funds, investment property and other assets can generate capital gains when sold at a profit. The taxable gain is generally calculated by subtracting the asset’s adjusted basis and qualifying selling expenses from the amount realised.

The distinction between short-term and long-term gains remains fundamental in 2026. A capital asset generally produces a short-term gain when it is held for one year or less, while an asset held for more than one year generally produces a long-term gain. The federal government provides preferential rates for qualifying long-term gains, whereas short-term gains are generally taxed using ordinary federal income-tax rates.

This distinction can have a substantial effect on the amount an investor ultimately keeps. An investor who sells shares after several months may have a gain taxed at an ordinary marginal federal rate as high as 37%. An investor who holds the same shares for more than one year may qualify for the lower long-term capital gains rates.

The Internal Revenue Service confirms that long-term net capital gains can be taxed at 0%, 15% or 20%, depending on taxable income and filing status.

What are the federal capital gains tax rates in 2026?

For 2026, the federal long-term capital gains system continues to use three principal rates. The 0% rate applies to taxpayers whose taxable income falls within the lowest applicable capital gains bracket. The 15% rate applies through the middle capital gains bracket, while the 20% rate applies to taxable income above the relevant upper threshold.

For unmarried taxpayers, the 2026 long-term capital gains thresholds are particularly important. The 0% rate applies up to taxable income of US$49,450, the 15% rate applies above that amount until taxable income reaches US$545,500, and the 20% rate applies above US$545,500. For married couples filing jointly, the corresponding thresholds are US$98,900 and US$613,700. Heads of household have thresholds of US$66,200 and US$579,600.

These figures are based on taxable income rather than simply the amount of investment profit. Consequently, an investor’s wages, business income, pension income, deductions and other taxable income can influence the rate applied to a capital gain.

This is particularly important for investors who assume that a large gain automatically receives the 20% rate. The federal system is progressive, meaning portions of a taxpayer’s net long-term capital gain can potentially fall into different capital-gains brackets.

The 2026 federal ordinary income-tax system also matters because short-term capital gains are generally taxed at ordinary rates. The top federal ordinary income-tax rate remains 37% in 2026, applying above US$640,600 for single taxpayers and US$768,700 for married couples filing jointly.

H&R Block Deluxe + State Tax Software 2025 Windows/Mac Download

Designed for people who want to be in control of their tax preparation experience and feel empowered by completing their own return. They want to get the biggest refund possible and are often homeowners, investors, or both.

The 3.8% net investment income tax can raise the federal burden

Higher-income investors need to consider a second federal tax that can apply to investment income. The net investment income tax, commonly called NIIT, is imposed at a rate of 3.8% on the lesser of net investment income or the amount by which modified adjusted gross income exceeds the applicable threshold.

The statutory thresholds are US$200,000 for single taxpayers and heads of household, US$250,000 for married couples filing jointly and qualifying surviving spouses, and US$125,000 for married taxpayers filing separately. Capital gains are among the forms of investment income that can be subject to the NIIT.

This means a high-income investor could face a federal capital gains rate of up to 23.8% on qualifying long-term gains before considering state taxation. That figure combines the 20% maximum long-term capital gains rate with the 3.8% NIIT when both taxes apply.

For investors in California, New York, New Jersey and Massachusetts, the potential combined burden can therefore be considerably higher once state income taxes are included.

California capital gains tax in 2026

California is one of the most important states for investors to examine when considering capital gains tax in 2026 because California does not provide a special lower state tax rate for capital gains.

Instead, California generally taxes capital gains as ordinary income. The state’s personal income-tax rates range from 1% to 12.3%, with an additional 1% tax applying to taxable income above US$1 million. That produces a potential top personal income-tax rate of 13.3%.

For a California investor, the federal long-term capital gains preference therefore does not translate into an equivalent state-level preference. A large investment gain can push taxable income into higher California brackets, increasing the state tax associated with the transaction.

This creates an important planning issue for residents selling highly appreciated shares, businesses or investment property. The federal government distinguishes long-term gains from ordinary income, while California’s treatment is substantially less favourable from a rate perspective.

California investors also need to consider residency. California generally taxes residents on worldwide income, while non-residents can still be subject to California tax on California-source income. The state’s rules governing residency and sourcing can therefore become particularly significant when an investor moves before selling an appreciated asset.

Subscribe for PRO

Your next best investment starts here.

Gain an investing advantage with exclusive access to benefits like CNBC’s industry-leading expert research and analysis, essential investing tools, premium editorial & video content, and global daytime coverage of CNBC TV live, accessible on desktop and mobile devices.

New York capital gains tax in 2026

New York also requires investors to consider state income tax when calculating the true cost of selling appreciated assets. New York does not operate a separate preferential long-term capital gains rate comparable to the federal 0%, 15% and 20% system. Instead, capital gains are incorporated into New York taxable income and generally subject to the state’s individual income-tax rates.

For high-income New York residents, this can produce a significant state tax liability on top of federal capital gains tax. Investors living in New York City also need to consider the city’s separate personal income tax, which can further increase the effective tax burden.

The issue extends beyond residents. New York’s rules for non-residents distinguish between income connected with New York sources and income that is not New York-source income. The state instructs non-residents to calculate New York capital gains and losses for transactions that constitute New York sources.

For investors considering relocation from New York before selling an appreciated portfolio, residency must therefore be analysed carefully. Moving from one state to another does not automatically eliminate a state’s taxing authority over every asset or transaction.

New Jersey capital gains tax in 2026

New Jersey takes another approach that can be costly for investors with substantial gains. Most investment income, including capital gains, is taxable under New Jersey’s individual income-tax system. The state uses graduated income-tax rates, with a top marginal rate of 10.75%.

Unlike the federal system, New Jersey does not provide a separate preferential rate structure that broadly mirrors the federal long-term capital gains rates. Consequently, an investor’s total taxable income can determine how much of a realised gain is subject to New Jersey income tax.

This is especially relevant to affluent households in northern New Jersey, where residents may already face substantial federal and state tax exposure. When a large stock portfolio, business interest or investment property is sold, the state component can materially reduce the net proceeds.

New Jersey residents should also distinguish between capital gains taxation and estate taxation. New Jersey no longer imposes a state estate tax on individuals who died on or after January 1, 2018, although its inheritance tax remains relevant in certain circumstances.

Massachusetts capital gains tax in 2026

Massachusetts presents a particularly distinctive situation. The state lists a 5% rate for long-term capital gains and other taxable income categories, while a 4% surtax applies to taxable income exceeding US$1,107,750 in tax year 2026.

The additional surtax means Massachusetts investors with sufficiently high taxable income can face a combined state rate of 9% on income affected by the surtax. Long-term gains from collectibles are treated differently and can be subject to a 12% rate, with the state’s rules providing a 50% deduction for those gains.

The Massachusetts system therefore deserves particular attention when an investor is planning a major liquidity event. A large gain from the sale of shares, a business or another investment can push taxable income beyond the state’s surtax threshold, potentially increasing the marginal state tax cost.

For Massachusetts households in high-income areas around Boston and the technology and financial sectors, the difference between federal and state treatment can have a meaningful effect on investment decisions.

How federal and state taxes can combine

The most important point for investors is that federal and state capital gains taxes generally operate simultaneously. A taxpayer does not normally choose between federal and state taxation. The same economic gain can form part of the federal tax calculation and the applicable state tax calculation.

Consider an investor who realises a substantial long-term gain while already earning a high income. The federal government may impose the 20% long-term capital gains rate, while the 3.8% NIIT may also apply. The investor’s state can then impose its own tax according to state-specific rules.

A high-income California investor, for example, can face a materially higher combined marginal burden than an investor in a state with no individual income tax. California’s maximum personal income-tax rate reaches 13.3%, while its capital gains are generally taxed as ordinary income.

New York and New Jersey investors likewise need to account for their state income-tax systems, while Massachusetts investors need to consider the state’s 4% surtax once the 2026 income threshold is exceeded.

The result is that the headline federal rate alone is not a sufficient measure of an investor’s actual tax exposure.

Tax-loss harvesting becomes more important

Capital losses can be valuable because they can offset capital gains. Under federal rules, if total capital losses exceed capital gains, an individual generally can deduct up to $3,000 of the net loss against ordinary income in a year, or US$1,500 for a married taxpayer filing separately. Unused losses generally can be carried forward to future years.

Tax-loss harvesting involves selling an investment that has declined in value to realise a tax loss that can offset realised gains elsewhere in the portfolio. The strategy needs to be implemented within the applicable tax rules, including the federal wash-sale rules governing substantially identical securities.

For investors in high-tax states, tax-loss harvesting can have an additional dimension because state tax liabilities may also be affected. The precise treatment varies by jurisdiction, so investors should calculate both federal and state consequences rather than assuming that a strategy producing a federal benefit will have an identical state effect.

The home sale exclusion can change the calculation

Capital gains from selling a primary residence can receive different treatment from gains on stocks and investment property. Federal law generally permits qualifying homeowners to exclude up to US$250,000 of gain for single taxpayers and up to US$500,000 for married couples filing jointly, subject to eligibility requirements.

The exclusion can substantially change the tax consequences of selling a home, particularly in expensive markets such as California, New York, New Jersey and Massachusetts where property appreciation can be considerable.

However, homeowners should not assume that every dollar of appreciation qualifies. Ownership, use and other statutory requirements apply, and special rules can affect taxpayers who previously used a property for business or investment purposes.

Capital gains tax in 2026: How US investors could be affected by federal and state taxes 8

File Taxes Online Yourself | Max Refund Guaranteed

Confidently file your own taxes online with trusted tools and step-by-step guidance. Max refund guaranteed with TaxAct DIY filing.

Investment property, businesses and other assets require more planning

Capital gains tax becomes more complicated when the asset being sold is investment real estate, a privately held business, cryptocurrency, collectibles or another specialised investment.

Real estate transactions can involve depreciation recapture and different federal tax categories, while the sale of a business can involve multiple classes of assets receiving different tax treatment. Cryptocurrency transactions can also create taxable gains or losses when digital assets are sold or exchanged.

The tax basis of an asset is equally important. Poor records can make it difficult to establish the correct gain, particularly for securities acquired through multiple purchases, inherited property, gifted assets or long-held investments.

Investors should therefore maintain detailed records of acquisition costs, reinvested dividends, capital improvements, transaction expenses and other basis adjustments. The larger the potential gain, the greater the financial consequence of an inaccurate basis calculation.

Does moving to another state eliminate capital gains tax?

Moving to a lower-tax state before selling an appreciated asset can sometimes change the state-tax outcome, but residency planning is more complicated than changing an address.

States examine residency, domicile, days spent in the jurisdiction and connections such as housing, family, employment and financial activity. They can also apply source rules to certain types of income.

California, New York, New Jersey and Massachusetts all have rules governing residents and non-residents, meaning an investor contemplating relocation before a major asset sale should obtain professional advice before assuming that a move will eliminate state taxation.

California’s official guidance, for example, specifically addresses the treatment of California and non-California capital gains and losses for residents and non-residents.

Save on expert tax prep and filing

We recommend Taxfyle for expert tax prep, filing, and advice. Claim an exclusive discount by booking with your Rocket Lawyer account.

What investors should watch during 2026

The most important development for investors in 2026 is that the federal long-term capital gains framework remains centred on the 0%, 15% and 20% rates, while broader federal tax legislation has changed numerous other elements of the tax code. The IRS’s 2026 inflation adjustments also affect ordinary income brackets, deductions and other calculations that can indirectly influence the tax rate applied to investment gains.

Investors should therefore evaluate a proposed sale as part of their entire tax picture rather than calculating capital gains tax in isolation. The timing of a sale, the holding period, other income, available losses, filing status, residency and state tax rules can all change the final liability.

For investors in California, New York, New Jersey and Massachusetts, the state component deserves particular attention because these jurisdictions can impose meaningful taxes on gains in addition to federal liabilities.

The bottom line on capital gains tax in 2026

Capital Gains Tax in 2026 is not determined by a single nationwide percentage. Federal long-term gains generally fall into the 0%, 15% or 20% brackets, while short-term gains are generally taxed at ordinary federal income-tax rates. Higher-income investors may also face the 3.8% Net Investment Income Tax, increasing the federal burden on qualifying investment income.

State taxation can produce an even larger difference between investors in different parts of the United States. California taxes capital gains as ordinary income and has a potential top personal income-tax rate of 13.3%. New York and New Jersey incorporate capital gains into their individual income-tax systems, while Massachusetts combines a 5% rate on long-term capital gains with a 4% surtax above its 2026 high-income threshold.

For investors, the practical lesson is that the tax consequences of selling an appreciated asset should be calculated before the transaction occurs. A strategy involving holding periods, tax-loss harvesting, asset location, charitable giving, residency planning or staged sales can potentially affect the amount ultimately retained after tax. Because federal and state rules interact and individual circumstances differ, substantial transactions should be reviewed with a qualified tax professional or financial adviser before execution.

324465828 506060108184794 4926160049931162859 n

With Rocket Tax, taxes aren’t taxing

Fast & easy Sign and upload documents in minutes on your phone, and get your taxes done fast — 7 days, on average. Attorney expertise Does your tax situation require legal guidance? Our network attorneys can share all the ins and outs. Saves you money Experts agree — using a pro reduces your risk of errors and audits. Plus, you get all the credits you deserve. Half off! Did we mention Rocket Legal+ members get HALF OFF? Upgrade now or join today and start saving!

A simpler way to prepare for capital gains tax

Investors facing capital gains tax in 2026 may benefit from professional tax preparation, particularly when investment transactions involve multiple accounts, realised gains and losses, or significant changes in income. Empower can connect you with tax filing providers who can help prepare, file and manage your tax return, giving investors access to professional support throughout the filing process.

For investors in California, New York, New Jersey and Massachusetts, where state tax rules can add complexity to federal capital gains calculations, professional tax assistance can be particularly valuable. A qualified tax filing provider can help ensure that investment income, capital gains, deductions and applicable state requirements are properly reflected in the return.

Consider Empower for your 2026 tax filing

Empower helps connect you with tax filing providers who can assist with preparing and filing your tax return from start to finish. Its platform can provide a central dashboard for organising your financial information while connecting you with professional tax support.

Set up your free Empower dashboard today and file your taxes now, with competitively priced tax filing services starting from US$175.

The cost of professional tax preparation should also be considered alongside the potential consequences of filing errors or overlooking applicable deductions, losses or tax obligations. For investors with substantial capital gains, professional preparation can provide an additional layer of support when navigating the interaction between federal and state taxation.

Explore Empower and set up your free dashboard

This article provides general educational information about US taxation and is not individual tax, legal or investment advice. Tax rules can change, and the appropriate treatment depends on the taxpayer’s specific circumstances.