Capital gains are taxed based on a "holding period" rather than a strict expiration date. Assets held for one year or less are short-term (taxed as ordinary income), while those held for over a year are long-term (taxed at 0%, 15%, or 20% rates). Specific tax-deferral exceptions like 1031 exchanges (45-180 days) exist for reinvestment.
short-term capital gains tax is the length of time you held the investment before selling it. Investments held for over a year are considered long-term, with a maximum 20% tax rate on the gains. Those held for 1 year or less are considered short-term, with federal tax rates ranging from 10% to 37%.
The "5-year rule" for capital gains tax primarily refers to the IRS's 2-out-of-5-year test for excluding gain on the sale of a primary residence, requiring you to have owned and lived in the home for at least two of the five years before selling it to exclude up to $250k (single) or $500k (married filing jointly) of profit. There are also rules for investment properties, like 1031 exchanges, which involve holding periods, and state-level exceptions, but the main federal rule is for your primary home.
If you have owned your home and used it as your main residence for at least two of the five years prior to selling it, then you can usually exclude up to $250,000 of capital gains on this type of real estate if you file as Single or Married Filing Separately, and up to $500,000 if you file as Married Filing Jointly.
The "12-month rule" for capital gains tax in the U.S. distinguishes between short-term and long-term gains: assets held for one year or less result in short-term gains, taxed at your higher ordinary income tax rates, while assets held for more than one year (over 12 months) generate long-term gains, taxed at lower, preferential rates (0%, 15%, or 20%). This rule determines if your profit gets taxed as regular income or at a reduced rate, making holding assets longer generally more tax-advantageous.
On a $100,000 capital gain, you'll likely pay 15% for long-term gains, resulting in about $15,000 in federal tax (plus potential state tax), but it could be 0% or 20% depending on your total taxable income and filing status, while short-term gains are taxed as ordinary income (potentially 22-24%).
There isn't a single "one-time" capital gains exemption, but the most common exemption allows you to exclude up to $250,000 (single) or $500,000 (married filing jointly) of profit from the sale of your primary residence, which can be used multiple times as long as you meet ownership and use tests (lived in it 2 of the last 5 years) and haven't used the exclusion in the past two years. Other options exist, like 1031 exchanges for investment properties or Charitable Remainder Trusts, but they have different rules.
When you sell your primary residence, $250,000 of capital gains (or $500,000 for a couple) are exempted from capital gains taxation. This is generally true only if you have owned and used your home as your main residence for at least two out of the five years prior to the sale.
To qualify for 0% capital gains tax, you must have long-term capital gains (assets held over a year) and your taxable income (after deductions) must fall below specific IRS thresholds, which change annually but are roughly <$48,350 for single filers and <$96,700 for married filing jointly for the 2025 tax year, allowing for higher total income when combined with deductions like the standard deduction. The key is keeping your adjusted gross income (AGI) low enough so that after subtracting deductions, your taxable income remains within these limits.
One of the simplest yet most expensive mistakes is misunderstanding the difference between short-term and long-term capital gains taxes. Short-term gains — profits from assets held less than a year — are subject to typical income tax rates, which can reach 37% for high earners.
Does reinvesting reduce capital gains? Real estate investors can employ certain tax strategies to potentially defer gains on the sale of a property. But with stocks, reinvesting your gains does not reduce the federal income taxes you may owe.
The 20% rule for capital gains refers to the highest federal tax rate for long-term capital gains, applying to higher income brackets when you sell investments (stocks, real estate) held for over a year, with lower rates of 0% and 15% for lower incomes, and even higher rates for special assets like collectibles. This rate kicks in for single filers earning over approximately $492,300 (2024) or $533,401 (2025), and higher for joint filers, making holding assets over a year a key tax strategy.
The "36-month rule" for capital gains tax (CGT) primarily refers to the UK's Principal Private Residence (PPR) Relief, where the final 36 months (or 9 months for most) of a property's ownership period are tax-exempt, even if not lived in, provided it was a main home at some point. In the US, the relevant rule for home sales is the "2-out-of-5-year rule" for the Section 121 exclusion, allowing up to $250k/$500k profit tax-free if owned and used as a main home for 2 of the 5 years before sale, with exceptions for unforeseen circumstances.
Capital gains tax rates
A capital gains rate of 0% applies if your taxable income is less than or equal to: $48,350 for single and married filing separately; $96,700 for married filing jointly and qualifying surviving spouse; and. $64,750 for head of household.
On a $100,000 capital gain, you'll likely pay 15% for long-term gains, resulting in about $15,000 in federal tax (plus potential state tax), but it could be 0% or 20% depending on your total taxable income and filing status, while short-term gains are taxed as ordinary income (potentially 22-24%).
As already mentioned, some assets are specifically exempt from CGT. Some of the most common examples are: private motor cars, including vintage cars. gifts to UK registered charities.
Second, capital gains taxes on accrued capital gains are forgiven if the asset holder dies—the so-called “Angel of Death” loophole. The basis of an asset left to an heir is “stepped up” to the asset's current value.
The 2025 tax legislation signed into law by President Trump, commonly referred to as the One Big Beautiful Bill Act, largely preserves the existing capital gains tax framework. Long-term capital gains rates remain set at 0%, 15% and 20%, with no changes to the underlying brackets.
If you sell your house and don't buy another, you'll have cash proceeds (after paying off the mortgage and selling costs) and need to decide on new housing, often renting or moving in with family; financially, you might benefit from the IRS capital gains exclusion (up to $250k/$500k profit if you've lived there two of the last five years), but you'll pay tax on gains beyond that, while also managing the new costs of renting or storage.
Who qualifies for 0% capital gains in 2025. Starting in 2025, single filers can qualify for the 0% long-term capital gains rate with taxable income of $48,350 or less, and married couples filing jointly are eligible with $96,700 or less. However, taxable income is significantly lower than your gross earnings.
Billionaires often employ the “buy, borrow, die” strategy to avoid income and capital gains taxes. First, they acquire appreciating assets like stocks or real estate. Instead of selling these assets when they need cash (which would trigger capital gains tax), they borrow against them at favorable interest rates.