Selling a stock, a rental property, or a slice of the family business has quietly become more complicated this year, and the difference between keeping thousands of dollars and handing them to the IRS often comes down to one number: how long you held the asset.
The capital gains tax isn't a single flat rate.
For assets held longer than a year, most American investors land in one of three long-term brackets — 0%, 15%, or 20% — depending on taxable income.
Short-term gains, meaning anything held a year or less, get taxed as ordinary income, which can push a high earner into the 37% bracket.
A married couple filing jointly can keep some long-term gains entirely tax-free.
For 2025, the 0% bracket runs up to roughly $96,700 in taxable income for couples and about $48,350 for single filers.
Above those lines, the 15% rate kicks in, and the top 20% rate applies to income over about $600,050 for couples.
There's a wrinkle that catches people by surprise: those thresholds are based on taxable income, not the size of the gain itself.
A retiree living mostly on savings can realize a substantial gain and still owe nothing, while a dual-income household selling a second home could owe 15% or more on every dollar above the line.
President Trump's 2025 tax law kept the long-term rate structure intact but layered in new deductions and adjustments that shift where some filers land.
The practical effect is that bracket math now matters more, not less.
Landlords selling rental properties face depreciation recapture taxed at up to 25%, plus the standard gains rate on the rest.
Homeowners who sell above the $250,000 single or $500,000 joint exclusion — a real possibility in many coastal markets — owe tax on the overage.
And anyone sitting on appreciated stock has to weigh whether to sell now, donate the shares, or hold until death for the step-up in basis.
For everyday investors, the strategy advice hasn't changed much.
And if you're near a bracket line, consider spreading sales across two calendar years instead of one.
Nine states charge no income tax at all, while others tax capital gains as ordinary income, which can add several percentage points to the federal bill.
That's why two neighbors with identical portfolios can owe wildly different amounts.
One more thing worth knowing: the Net Investment Income Tax tacks an extra 3.8% onto investment income for single filers above $200,000 and couples above $250,000.
It's separate from the capital gains rate and easy to overlook until April. **Our take:** The capital gains rules reward patience more than cleverness, and that's unlikely to change.
Final Thoughts
If you're planning a big sale, run the numbers before you sign anything — the difference between a 15% and 20% rate is real money.