United States · Reviewed 2026-08-20
U.S. capital gains tax on stocks
When U.S. individuals sell shares for more than their cost basis, the gain is generally a capital gain. Holding period often decides whether the gain is short-term or long-term.
What investors usually mean
A capital gain (or loss) appears when you dispose of a capital asset - such as publicly traded stock - for proceeds different from your adjusted basis. Buying and holding does not, by itself, create taxable gain; realization on sale (or certain other events) typically does. StockWatch shows market prices for research; your broker cost-basis lots determine the tax math.
Short-term vs long-term
For many individual taxpayers, shares held one year or less produce short-term capital gains taxed like ordinary income. Shares held more than one year can qualify for long-term capital gains rates, which are often lower than ordinary rates. Wash-sale rules can disallow or defer a loss if you repurchase substantially identical securities within a defined window around the sale.
What to track
Keep trade confirms, dividend reinvestment details, corporate actions, and year-end 1099-B / consolidated statements. Basis adjustments matter after splits, spin-offs, and return-of-capital distributions. If you trade across multiple brokers, you still need a consolidated view before filing.
Simple example
Educational numbers only - not your return.
Example (illustrative only): you buy 10 shares at $100 and sell after 18 months at $130. The $300 gain may be long-term if holding-period tests are met. Exact tax depends on your bracket, other gains/losses, and current IRS rates.
Common mistakes
- Assuming every green day on a quote page is a taxable event - unrealized gains are not the same as realized gains.
- Ignoring wash-sale windows when harvesting losses near a repurchase.
- Forgetting that short-term gains can stack on top of wage income in ordinary brackets.
Sources & further reading
Capital gains FAQ
Short answers for discovery.
What is u.s. capital gains tax on stocks?
When U.S. individuals sell shares for more than their cost basis, the gain is generally a capital gain. Holding period often decides whether the gain is short-term or long-term.
What is a common mistake on United States u.s. capital gains tax on stocks?
Assuming every green day on a quote page is a taxable event - unrealized gains are not the same as realized gains.
What is a common mistake on United States u.s. capital gains tax on stocks?
Ignoring wash-sale windows when harvesting losses near a repurchase.
Is there a simple example for United States?
Example (illustrative only): you buy 10 shares at $100 and sell after 18 months at $130. The $300 gain may be long-term if holding-period tests are met. Exact tax depends on your bracket, other gains/losses, and current IRS rates.
Investor tax guides
Featured explainers that pair with the United States desk and this topic - then open All guides for the full library.
- Tax Loss Harvesting Explained for Stock InvestorsTax loss harvesting means selling investments at a loss in a taxable account to offset capital gains (and sometimes a slice of ordinary income), then staying invested without triggering wash-sale or anti-avoidance rules. It helps most when you already have gains to offset - not as a reason to wreck a long-term plan.
- Capital Gains Tax on Stocks: Investor OverviewCapital gains tax (CGT) generally applies when you sell shares or ETFs for more than your cost basis. Rates, allowances, and holding-period rules vary by country - start here for the shared math, then open a StockWatch country CGT desk or country guide before you file.
- Crypto Tax Basics for InvestorsMost tax systems treat crypto like property for investors: selling, swapping, or spending can realize a gain or loss, and staking or airdrop rewards may look like income. Rules differ sharply by country - use this guide to frame the events, then open a capital-gains desk for your residency.
- Tax-Advantaged Accounts for Investors (IRA, 401k, ISA & More)Tax-advantaged accounts change when and how investment income is taxed: deferral inside pensions, tax-free growth in some wrappers, or employer plans with contribution limits. Names differ (401(k), IRA, ISA, TFSA, SIPP) - the design pattern is similar, and taxable brokerages still matter for overflow capital.
- Tax Loss Harvesting in the United StatesIn the U.S., tax loss harvesting usually means selling losers in a taxable account to offset capital gains - and sometimes up to $3,000 of ordinary income - while watching the wash-sale rule. This guide frames the pattern; confirm current IRS rules and your broker reports before filing.
- Capital Gains Tax on Stocks in the United StatesIn a U.S. taxable account, selling shares above your basis typically creates a capital gain taxed as short-term or long-term depending on holding period. Rates, netting, and forms change - use this as a map, then open the U.S. desk and IRS materials for the year you file.
- Wash-Sale Rule Explained for Stock InvestorsA wash sale generally means you sold at a loss and bought the same or a substantially identical security too close to that sale - so the loss may be disallowed or deferred. The textbook story is U.S.-centric; other markets use different rules. Use this guide before year-end harvesting.
- Roth vs Traditional IRA Basics for InvestorsTraditional IRA contributions may be deductible now with taxable withdrawals later; Roth contributions are after-tax with qualified withdrawals potentially tax-free. Eligibility, limits, and conversions are year-specific. Use this vocabulary guide, then the U.S. accounts desk.