The 0% Capital Gains Rate in Retirement
The 0% long-term capital gains rate applies to taxable income up to $48,350 (single) or $96,700 (married jointly) in 2025. For retirees drawing from Social Security, pensions, and limited distributions, managing income to stay within these thresholds can produce years of entirely tax-free capital gain realization. This is particularly powerful in early retirement before Required Minimum Distributions begin at age 73.
Example: 0% rate capital gains harvesting in retirement — married couple
| Retirement Income Source | Amount | Taxable Portion |
|---|---|---|
| Social Security (married filing jointly) | $36,000 | $30,600 (85% taxable — income too high for lower inclusion) |
| 401(k) withdrawal | $30,000 | $30,000 (fully taxable) |
| Total ordinary income | — | $60,600 |
| Long-term capital gains (0% bracket remaining) | Up to $36,100 | $0 — in 0% bracket (below $96,700 MFJ threshold) |
Strategic Tax-Gain Harvesting in Retirement
Tax-gain harvesting is the inverse of tax-loss harvesting: in low-income years when you are in the 0% long-term capital gains bracket, intentionally realize gains on appreciated investments. This resets the cost basis to a higher level — future gains will be smaller. The key: you pay 0% tax now versus 15-20% later when income is higher (when RMDs begin, for example).
- Identify the 0% bracket space available based on expected total income for the year
- Sell appreciated long-term investments up to the 0% bracket threshold
- Immediately repurchase the same investments — no wash sale issue (you are realizing a gain, not a loss)
- Your new cost basis is the repurchase price — future gains are smaller
- This works best in early retirement before RMDs and Social Security maximization
- Model carefully: each dollar of gain may also impact Social Security taxability thresholds
- Roth conversions compete for the same income space — coordinate both strategies together
A married couple who harvests $30,000 in long-term gains at 0% in each of 10 low-income retirement years eliminates $300,000 in gains from future higher-bracket taxation. If they later sell those positions at a 15% rate, they save $45,000 in federal taxes. Combined with state tax savings, lifetime tax savings can exceed $50,000 from this systematic approach.
IRMAA: How Capital Gains Affect Medicare Premiums
Realize too much in capital gains and you cross the IRMAA threshold, increasing Medicare Part B and D premiums for two years. In 2025, the IRMAA surcharge begins at $106,000 MAGI (single) or $212,000 (MFJ). A large gain harvest that pushes MAGI above these thresholds can trigger $1,000-$10,000+ in additional annual Medicare premiums starting two years later. Always model IRMAA impact before harvesting significant gains in retirement.
Model Your Retirement Capital Gains Tax
Enter your expected retirement income and capital gain amounts to see how much falls in the 0% bracket.