Long-Term Capital Gains Tax Rates: The 0% Bracket Most Investors Don't Know They Qualify For

The IRS taxes long-term investment gains at a lower rate than wages. Most people know this. What most people don't know is that the lowest rate is zero, and a significant number of self-employed people qualify for it in most years.

The 0% long-term capital gains rate applies to single filers with taxable income up to $48,350 in 2025. Married filing jointly, it's $96,700. That's not income before deductions. It's taxable income after your standard or itemized deduction, after business expenses, after retirement contributions.

How the stacking math works

Long-term gains don't get their own separate tax calculation. They stack on top of your ordinary income, and your rate is determined by where the total lands in the LTCG brackets.

A freelancer with $42,000 in ordinary income has $6,350 of space left before the $48,350 threshold. If they realize $10,000 in long-term gains, the first $6,350 lands at 0% and the remaining $3,650 gets taxed at 15%. Total LTCG tax: $547. That's a 5.5% effective rate on $10,000 in gains.

That same $10,000 in short-term gains would be taxed as ordinary income. At 22% federal, that's $2,200.

The math on holding investments for at least a year is almost never this clean. But the principle holds. The rate difference between short-term and long-term can be the difference between 22% and 0%.

The self-employed advantage

W-2 employees can't easily manipulate their ordinary income. Their salary is their salary.

Self-employed workers can. A $25,000 Solo 401k contribution reduces ordinary income by $25,000. A home office deduction, a health insurance premium deduction, business expenses, all of these reduce ordinary income directly. The lower your ordinary income, the more room you have for long-term gains at the 0% rate.

Someone with $70,000 in gross self-employment income who contributes $25,000 to a Solo 401k and claims $8,000 in other deductions ends up with $37,000 in ordinary income. Every dollar of long-term gain up to $11,350 lands at 0%.

This is gain harvesting. The strategy is to realize long-term gains in years when your ordinary income is low, on purpose. It works for variable-income freelancers with a slow year, people ramping up a new business, and anyone making large retirement contributions.

The 15% and 20% brackets

Most investors who owe capital gains tax pay at 15%. The 20% rate only applies above $533,400 (single) or $600,050 (married filing jointly) in total income including gains.

Unless you're selling a concentrated position in a very high-income year, 20% rarely applies. The NIIT is the more common surprise for people in the $200K-$400K range.

NIIT: the surtax most people miss

The 3.8% Net Investment Income Tax applies to investment income, including capital gains, when your modified AGI exceeds $200,000 (single) or $250,000 (married). It's applied to the lesser of your net investment income or the amount by which your income exceeds the threshold.

A single filer with $215,000 in income and $20,000 in gains pays 3.8% on $15,000, not the full $20,000. That's $570 in additional tax.

Combined with the 15% LTCG rate, the effective rate becomes 18.8% on gains above the threshold. Not devastating. But not 15% either.

The one-year rule in practice

Assets held one year or less are short-term gains. Ordinary income rates apply, no exceptions.

For investments you're holding anyway, this is easy to manage: don't sell within the first year. For concentrated equity comp (RSUs, options), it requires attention to grant and vest dates.

The one-year line also matters for tax-loss harvesting. If you have unrealized gains in one position and unrealized losses in another, selling both in the same year offsets the gain dollar-for-dollar. Losses above that offset up to $3,000 of ordinary income per year, with the rest carrying forward.

Rental property is different

Selling rental property with accumulated depreciation doesn't work like selling stock. The portion of the gain equal to your total accumulated depreciation is taxed at a maximum 25% federal rate, called Section 1250 depreciation recapture. Regular long-term capital gains rates don't apply to that piece.

Use the rental property depreciation calculator to see your accumulated depreciation, then run your expected sale price through the capital gains calculator to see the full tax picture before you list.

What actually matters for planning

The 0% bracket is real. Most self-employed people don't know they're in range or could get there with one or two decisions. Run your numbers in a low-income year before you assume your gains will cost you anything.