If you sold a stock, a rental property, or even some crypto this year, there's a decent chance you owe the IRS something — and the amount depends on how long you held onto it.
The difference between a short-term and long-term hold can be thousands of dollars for the average household.
Assets you've owned for one year or less fall under short-term capital gains, and those are taxed at your ordinary income rate — the same rate you pay on your paycheck.
That can reach 37% for top earners, which stings.
Hold the same asset for more than a year and it qualifies for long-term rates, which are far friendlier: 0%, 15%, or 20% depending on your taxable income.
For 2025, the 0% long-term rate applies to single filers with taxable income up to about $48,350, and married couples filing jointly up to roughly $96,700.
That means a lot of middle-income households who sell investments may owe nothing on the gain at all.
Above those thresholds, most people land in the 15% bracket, while the 20% rate only kicks in for single filers above about $533,400 and couples above roughly $600,050.
There's an extra wrinkle most people miss.
High earners — generally those with modified adjusted gross income above $200,000 single or $250,000 joint — also owe a 3.8% net investment income tax on top of the capital gains rate.
So that "15%" can quietly become 18.8% once you add it up.
Where people get burned is timing and paperwork.
Sell a stock you bought 11 months ago instead of 13, and you can jump from 15% to 30%-plus on the gain.
Reinvested dividends, employee stock purchase plans, and inherited property each follow their own rules.
And if you sold a home, the first $250,000 of profit (or $500,000 for couples) is typically excluded — but only if you lived there two of the last five years.
One more thing worth checking: your state.
Most states tax capital gains as regular income, and a handful — including California and New Jersey — hit high earners hard.
There's no state capital gains break in those places, so the federal rate is only half the story.
Before you file, grab your 1099-B forms and your cost basis records.
If a broker doesn't have your original purchase price, the IRS may assume a $0 basis and tax the entire sale.
That's an expensive assumption to correct after the fact. **The bottom line:** Capital gains taxes aren't one number — they're a formula, and the holding period does most of the heavy lifting.
Final Thoughts
If you're sitting on a winner you've held for just under a year, doing the math before you sell could easily save you more than any coupon or cash-back card ever will.