Sell a stock at a profit and the IRS wants its cut.
But how big that cut is depends on how long you held the asset, and a lot of Americans get this wrong every April.
Hold an investment for 12 months or less and your profit counts as a short-term gain, taxed at your ordinary income rate — which can climb past 35% for top earners.
Hold it longer than a year and it becomes a long-term gain, taxed at friendlier brackets of 0%, 15%, or 20%.
For the 2024 tax year, single filers with taxable income up to $47,025 owe nothing on long-term gains.
Married couples filing jointly get up to $94,050.
The catch: this is taxable income, not your salary.
A raise, a side hustle, or a big Roth conversion can quietly push you into the 15% tier.
The 15% rate is where most middle- and upper-middle-income households land.
The 20% rate only kicks in above roughly $518,900 for singles and $583,750 for joint filers in 2024.
On top of the base rate, higher earners may owe an extra 3.8% net investment income tax.
There's a wrinkle people miss: capital gains stack on top of ordinary income.
If you earn $60,000 and sell stock for a $30,000 long-term gain, you don't get the 0% rate on that gain just because your salary alone sits below the threshold.
The gain fills up the brackets above your regular income.
The IRS lets single filers exclude up to $250,000 of profit on a primary residence, and joint filers up to $500,000 — provided you lived there two of the last five years.
That's a separate break from the investment brackets, and it's saved sellers a fortune in hot housing markets.
Retirement accounts sidestep all of this.
Gains inside a 401(k) or traditional IRA aren't taxed year by year; you pay ordinary income tax when you withdraw.
Roth accounts can come out tax-free if you follow the rules.
That's a big reason advisors push maxing these out before taxable brokerage accounts.
If you're sitting on a winner, timing matters.
Waiting a few extra weeks to cross the one-year mark can cut your rate dramatically.
Some investors also harvest losses — selling a loser to offset gains — which can trim the bill.
Just watch the wash-sale rule, which blocks you from rebuying the same security within 30 days if you want the loss to count.
Most states tax capital gains as ordinary income, and a handful — including California and New Jersey — hit high earners hard.
No-tax states like Florida, Texas, and Nevada look appealing for exactly this reason, though moving has its own costs.
Nine states, including Washington and New Hampshire, have no tax on individual income at all.
The brackets adjust for inflation each year, so the thresholds creep upward.
The IRS publishes updated figures every fall.
If your income is close to a cutoff, a small shift in the numbers can change your rate.
None of this is personalized advice — your situation depends on your bracket, your state, and what you're selling.
A tax pro or a quick run through IRS Publication 550 can clarify what you actually owe before you cash out. **Our take:** The one-year holding rule is the single most valuable lever most investors ignore.
Final Thoughts
Waiting a few weeks to sell can be worth thousands of dollars, and it costs you nothing but patience.