There is no single flat federal capital-gains-tax rate that applies to every transaction. Short-term gains are generally taxed under ordinary income-tax rates, while qualifying net long-term capital gains can receive preferential rates.
Key Takeaways
- Gain starts with basis: A taxable gain generally equals amount realized minus adjusted basis.
- Holding period matters: One year or less is generally short-term; more than one year is generally long-term.
- Losses are netted against gains: Short- and long-term categories are calculated under federal netting rules.
- Special rates can apply: Collectibles, certain real-estate gains, and other categories can receive different treatment.
How Capital Gains Tax Starts With the Gain Calculation
A taxpayer first determines whether the sale produced a capital gain or capital loss. The basic comparison is the amount realized from the disposition against adjusted basis.
Short-Term vs. Long-Term Capital Gains
A gain is generally long-term when the asset was held for more than one year and short-term when held for one year or less, subject to special rules for certain property.
| Holding period | General federal treatment |
|---|---|
| One year or less | Net short-term gain generally taxed at ordinary income-tax rates |
| More than one year | Net long-term gain can qualify for preferential capital-gain rates |
The applicable long-term rate depends on taxable income and filing status, so thresholds should be checked for the specific tax year.
How Capital Losses Reduce Taxable Gains
Federal rules first net short-term gains against short-term losses and long-term gains against long-term losses. The resulting net amounts are then combined under the capital-loss netting rules.
If capital losses exceed capital gains, individuals can generally deduct a limited amount of net capital loss against other income and carry excess losses forward, subject to current federal rules.
Special Capital-Gain Rates
Most net long-term capital gain uses the standard preferential rate structure, but some categories have different maximum rates. Special rate rules apply to collectibles, certain qualified small business stock, and unrecaptured Section 1250 gain from depreciable real property.
The Net Investment Income Tax can also apply to certain taxpayers with significant investment income, creating an additional layer beyond the regular capital-gain rate.
Capital Gains Tax on a Home
A qualifying sale of a principal residence can exclude part of the gain from federal taxable income when ownership, use, and other requirements are met. The exclusion is not automatic for every real-estate sale.
Capital improvements can increase basis, while depreciation or other adjustments can affect the taxable calculation in certain circumstances.
Where Capital Gains Are Reported
Many investment sales are reported on Form 8949 and summarized on Schedule D. Brokerage Form 1099-B can provide sale proceeds and, for covered securities, basis and holding-period information.
Broker records are helpful but taxpayers remain responsible for correcting incomplete or inaccurate basis data and reporting transactions properly.
Realized vs. Unrealized Gains
Ordinary federal capital-gains tax generally arises when a gain is realized through a taxable sale or disposition. A stock that rises in value but is still held usually has an unrealized gain rather than a currently taxable sale gain.
Planning Around Capital Gains
Large realized gains can affect estimated-tax requirements, MAGI-based phaseouts, investment-income taxes, and other income-sensitive tax provisions.
Tax-loss harvesting, charitable giving, timing of sales, and account location can affect the result, but each strategy has separate eligibility and anti-abuse rules that should be evaluated before acting.