The 0% Capital Gains Bracket Is One of the Most Overlooked Tax Breaks in Retirement
A single line in the tax code can eliminate federal tax on tens of thousands in investment gains, and most retirees never think to look for it. Knowing when the window opens and what quietly closes it makes the difference.
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Picture two spouses, each 63, who retired last year and are living on savings while they put off claiming Social Security. In 2026 they can sell more than $81,000 of appreciated stock and owe $0 in federal tax on the gain. A single line in the tax code does the work.
That line is the 0% long-term capital gains rate in Section 1(h) of the Internal Revenue Code. For tax year 2026, it covers long-term gains and qualified dividends as long as taxable income remains at or below $49,450 for single filers and $98,900 for married couples filing jointly, according to Revenue Procedure 2025-32.
How Section 1(h) Lets Capital Gains Pay Nothing
Think of the 0% bracket as a glass. Ordinary income goes in first: pensions, IRA withdrawals, interest, wages. Long-term gains fill whatever room is left. The law applies 0% to the part of your adjusted net capital gain that fits below the line, under 26 U.S.C. § 1(h)(1)(B).
The threshold applies to taxable income, which is income after deductions. For 2026, the standard deduction is $32,200 for married couples filing jointly and $16,100 for single filers. That means a couple’s gross income can run well past $98,900 and still qualify.
A $131,100 Income That Owes $0 on Its Gains
Here are the assumptions: married filing jointly, both spouses 63, tax year 2026, $50,000 of ordinary income from IRA withdrawals and interest, the standard deduction, and index-fund shares held more than a year in a taxable brokerage account.
| Line | Amount |
|---|---|
| Ordinary income | $50,000 |
| Standard deduction | $32,200 |
| Taxable ordinary income | $17,800 |
| 0% limit (joint) | $98,900 |
| Room for 0% gains | $81,100 |
| Total gross income | $131,100 |
| Federal tax on the gains | $0 |
| Federal tax on ordinary income | $1,780 |
The whole $17,800 of ordinary income is taxed at 10%, a rate that runs up to $24,800 for joint filers in 2026. If the same $81,100 of gains landed in a year with higher income, the 15% rate would cost them $12,165.
Going over the line costs only part of the break. Suppose this couple realized $100,000 of gains instead. The first $81,100 still gets the 0% rate. The 15% rate applies only to the extra $18,900, for a tax bill of $2,835.
Why Early Retirees Get a 0% Window That Workers Miss
While you’re working, your paycheck fills the glass. Later, required minimum distributions and Social Security fill it. The years in between can have unusually low taxable income, and that’s when this break pays the most. It’s the same quiet stretch we sized up for Roth conversions in a free guide to the Roth window, and the two strategies compete for the same room.
The 2026 limit of $98,900 sits just below the start of the 22% bracket, which begins at $100,800 for joint filers. If your taxable income falls in the 10% or 12% bracket, you’re close to the zone.
You can use the room even if you don’t need the cash. With tax-gain harvesting, you sell the winners and buy them right back. The wash-sale rule blocks only losses, so buying back increases your cost basis and reduces the taxable gain on any later sale.
Four Traps That Shrink the 0% Zone After 65
- Social Security tax. Capital gains count toward the income test that determines how much of your benefit is taxable, up to 85% under 26 U.S.C. § 86(a)(2). Each newly taxable benefit dollar takes up 0% room and can push gains into the 15% rate.
- Deduction for seniors. Filers 65 and older can claim an extra $6,000 per qualifying person for tax years beginning before January 1, 2029. It reduces by 6% of modified AGI above $75,000 ($150,000 joint), and gains count toward that figure.
- IRMAA. Medicare sets Part B and Part D premiums from your income two years earlier, and gains count. The surcharge levels are drops, so going $1 over a levels increases your premiums for the entire year.
- State tax. The 0% rate applies only on your federal return. Many states tax capital gains as ordinary income.
Three Moves to Make Before December 31
- Estimate your 2026 taxable income now. Add up your ordinary income through year-end, subtract your deductions and compare the result with the 0% limit for your filing status.
- Consider harvesting gains up to the line, and leaving a margin. Mutual funds often pay capital gains distributions in December, and an unexpected one can push you over.
- Determines which strategy gets the room. Roth conversions count as ordinary income and fill the same space. Use the room for either gains or a conversion, depending on which saves more over your lifetime. If you plan to leave appreciated shares to heirs, the step-up in basis at death may make harvesting unnecessary.
Running these numbers alongside Social Security, IRMAA and conversion decisions is worth doing with a fiduciary advisor or CPA before the year ends.
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Vilma Rios is a tax professional and tax content contributor with more than 15 years of experience in tax and accounting. She specializes in federal tax research, tax education, and translating complex tax rules into clear, practical information for individuals, families, and small-business owners.
Vilma is a Content Tax Contributor II with the National Association of Tax Professionals (NATP), where she contributes to tax education and professional content. She has also presented tax information through webinars, including Spanish-language tax education, and has appeared on Telemundo 47 discussing tax topics and helping viewers understand important tax-filing requirements.
Her experience also includes tax and accounting work, tax research, IRS-related matters, and public tax education. While in college, Vilma volunteered in an IRS-sponsored tax assistance program and was recognized for her community service by local and state officials.
Known as “Your Tax Geek,” Vilma is passionate about making taxes easier to understand and helping people navigate an increasingly complex tax system.
