The 0% Capital Gains Bracket: How Retirees Can Realize $94,000 in Tax-Free Gains

A retired couple in their mid-60s, sitting on a large brokerage account with decades of embedded gains, has one of the most underused tax breaks in the entire code working in their favor: the 0% long-term capital gains bracket. Used correctly, it lets them turn taxable paper profits into realized cash, reset their cost basis, and rebalance away from concentrated positions, all while writing a federal tax check that rounds to near zero.

The Scenario: Newly Retired, Cash-Light, Gain-Heavy

Here is the setup that triggers the strategy, as a 64-year-old married couple retired this year and claimed Social Security early, pulling in $50,000 in benefits. They have no W-2 income, so their taxable brokerage account holds $600,000, of which $250,000 is their cost basis and $350,000 is unrealized long-term gain, much of it concentrated in a handful of positions that have run for years.

Versions of this question show up constantly on the Bogleheads forum and r/financialindependence: retirees ask how to peel off appreciated stock without lighting up their tax return, and most answers underuse the 0% bracket because the math feels too good to be real.

The compact picture:

• Ages: Both 64, married filing jointly, retired in 2026.
• Income: $50,000 Social Security, no wages, no pension.
• Brokerage: $600,000 market value, $250,000 basis.
• Goal: Trim concentrated positions and rebalance without triggering a tax bill.

The Mechanic That Drives Everything: How the 0% Bracket Stacks

Long-term capital gains stack right on top of ordinary income when you file your return. That means the sweet 0% capital gains rate applies only to profits that remain below the 2026 taxable income ceiling, which is exactly $96,700 for couples filing jointly.

Since their joint standard deduction is $32,200, the baseline math is straightforward. Up to 85% of Social Security benefits can be taxable, meaning a $50,000 benefit adds roughly $42,500 to ordinary income. Once you subtract their standard deduction, they are left with just $10,300 in taxable ordinary income before touching their brokerage portfolio.

That leaves a massive $86,400 window wide open inside the 0% capital gains bracket. So here is the play: they cash out $250,000 from the brokerage, where roughly $94,000 represents long-term growth, and the remaining block is simply a return of basis.

The first $86,400 of that growth falls squarely into the 0% tax bracket. The tiny leftover sliver, about $7,600, bumps into the 15% tier and triggers a minor $1,140 federal tax bill. Think about that for a quarter-million-dollar cash out.

For context, realizing the same $94,000 as ordinary income would have climbed straight into the 22% federal bracket and triggered roughly $5,000 in tax. Shifting the income type to long-term gains, with ordinary income sitting below, drives this powerful wealth-building outcome.

Three Realistic Paths Through the Bracket

1. Harvest and buy back the same positions. The wash-sale rule applies only to losses, not gains. Selling and immediately repurchasing resets the cost basis to the current market price, locking in the tax-free gain and reducing the future taxable gain on the same shares. This is the cleanest move when the couple still likes what they own but wants the basis reset.
2. Harvest and rebalance into a diversified portfolio. Use the sale to trim concentrated single stocks and redeploy into broad index funds, a Treasury ladder, or a mix. With the 5-Year Treasury near 4% and the 10-Year around 4.5%, locking in fixed income at meaningful yields pairs well with shrinking equity concentration risk.
3. Layer in partial Roth conversions. Possible, but dangerous here. Roth conversions add ordinary income that stacks below capital gains, pushing LTCG out of the 0% bracket dollar for dollar. For a couple optimizing the 0% bracket, conversions are usually better delayed until after age 70 when Social Security is fully claimed, and the brackets are already filled.

What To Do Before December 31

The decision that matters most is precisely sizing the sale. Recalculate the 0% LTCG ceiling using the current year’s IRS figures, then back into the maximum gain you can realize without spilling into the 15% bracket. Run the projection in November, not late December, so dividend distributions and any year-end ordinary income are already on the books.

One common, costly mistake: forgetting state tax. California taxes long-term gains as ordinary income, with a top rate of 13.3%, and Oregon (9.9%) and Minnesota (9.85%) are not far behind. A federal $0 tax bill can still produce a five-figure state tax bill, so model the net amount before pulling the trigger. Document the basis return cleanly on Schedule D and Form 8949, since misreported basis is among the most frequent audit triggers on brokerage sales.

Run annually until Social Security is fully claimed at 70, when rising benefit income narrows the bracket. Over six years, that is potentially $400,000 to $500,000 in realized gains at near-zero federal tax. The math isn’t even close.