Should I harvest capital gains now, or wait?
Long-term capital gains (on investments held over a year) are taxed at 0%, 15%, or 20% depending on your total taxable income — brackets that are separate and generally more favorable than ordinary income tax rates. For retirees whose taxable income has dropped after leaving the workforce, this creates real planning opportunity.
The 0% bracket is wider than most people think
Many retirees assume any capital gain gets taxed — but if your total taxable income (including the gain itself) falls under the 0% long-term capital gains threshold for your filing status, that portion of the gain is taxed at 0%. This "stacks" on top of your ordinary income: your ordinary income fills the bottom of the bracket structure first, and capital gains stack on top of that.
A retired couple with modest Social Security and pension income, and no other income, can often realize a substantial capital gain at 0% federal tax — a strategy sometimes called "gain harvesting," the mirror image of tax-loss harvesting.
Two strategies worth knowing
Gain harvesting
Deliberately selling appreciated investments in a low-income year to "reset" your cost basis at 0% tax — then, if you want, immediately buying back in (unlike tax-loss harvesting, there's no wash-sale rule blocking this for gains).
Loss harvesting
Selling losing positions to offset gains elsewhere, or up to a limited amount against ordinary income each year, with excess losses carrying forward to future years.
Watch the IRMAA and Social Security taxability interactions. A large realized gain increases your AGI for the year, which can push you into a higher Medicare IRMAA bracket two years later and increase how much of your Social Security benefit is taxable — the federal capital gains tax rate isn't the only cost to model.
Timing considerations that matter
Spread large gains across multiple years
Rather than selling a large position all at once, realizing gains gradually across several years can keep you in a lower bracket each year instead of spiking into a higher one in a single year.
Coordinate with RMDs and Roth conversions
All three — RMDs, Roth conversions, and realized capital gains — compete for the same limited "room" in your lower tax brackets each year. Plan them together, not separately.
Consider state taxes separately
Not every state follows federal capital gains treatment — some tax capital gains as ordinary income at the state level regardless of your federal bracket.
Get help coordinating gains, RMDs, and conversions
A fiduciary financial advisor can model exactly how much room you have in the 0% bracket and coordinate it with your other retirement income sources.
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Common questions
Do capital gains count toward the income that makes Social Security taxable?
Yes — capital gains are included in the combined income calculation the IRS uses to determine how much of your Social Security benefit is taxable.
What's the difference between short-term and long-term capital gains?
Assets held one year or less are short-term gains, taxed at your ordinary income rate. Assets held longer than a year qualify for the lower long-term rates (0%, 15%, or 20%) discussed here.
Can I harvest gains and immediately rebuy the same investment?
Yes — the wash-sale rule only restricts repurchasing after selling at a loss, not after selling at a gain, so gain harvesting doesn't have the same 30-day rebuy restriction.