Two retirees. Same portfolio size. Same lifestyle spending. Wildly different tax bills.
If that sounds like an exaggeration, it is not. One of the least-discussed realities of retirement taxation is that identical income levels can produce vastly different tax outcomes depending on where that income comes from—and whether it is taxed as ordinary income or as a capital gain.
Understanding the difference is not just an academic exercise. For retirees with taxable investment accounts, this distinction shapes real decisions about when to sell, which assets to draw from, and how to structure income to stay in the most favorable tax position possible.
Ordinary Income vs. Capital Gains: The Core Distinction
Ordinary income is taxed at your marginal income tax rate—the same rate applied to wages, IRA withdrawals, pension payments, and most forms of income. For 2025, federal brackets range from 10% to 37%, and the rate applied depends on your total taxable income.
Long-term capital gains—profits from the sale of assets held longer than one year—are taxed at separate, preferential rates: 0%, 15%, or 20% at the federal level, depending on your income. For most middle-income retirees, the applicable rate is 15%. For those with lower retirement income, the 0% rate may apply to a meaningful portion of their gains.
That difference—between paying 22% or 24% on ordinary income versus 15% or even 0% on long-term gains—is not trivial. On a $50,000 withdrawal, the difference between a 22% ordinary income rate and a 0% capital gains rate is $11,000 in a single year.
Why This Matters More in Retirement Than During Your Working Years
During your working years, income is largely fixed—your paycheck, perhaps some investment income. There is limited flexibility to change the character of your income for tax purposes.
In retirement, that changes. With multiple account types and flexibility in timing, you often have genuine ability to influence whether your income is characterized as ordinary income or capital gains—by choosing which accounts to draw from, when to sell taxable assets, and how to sequence withdrawals across your portfolio.
That flexibility, used thoughtfully, is a meaningful tax advantage that most retirement investors do not fully capture.
The 0% Capital Gains Rate: Retirement’s Hidden Opportunity
For 2025, the 0% long-term capital gains rate applies to taxable income up to approximately $47,025 for single filers and $94,050 for married couples filing jointly. If your total taxable income—after deductions—falls below those thresholds, you can realize long-term capital gains from your taxable account and owe no federal tax on those gains.
For many retirees in the early years of retirement, before Social Security and RMDs have fully kicked in, this threshold is achievable. A couple with modest Social Security income and careful withdrawal management might find that they can harvest $20,000, $30,000, or more in long-term gains each year at a zero federal rate.
This is not a loophole—it is a deliberately designed feature of the tax code, intended to reduce the tax burden on investment income for middle-income earners. Capturing it requires planning and intentionality, but it is entirely legitimate and surprisingly underutilized.
How Capital Gains Interact With the Rest of Your Tax Picture
Capital gains do not exist in isolation. They interact with the rest of your retirement income in ways that can either help or hurt your overall tax position.
Capital Gains and Social Security Taxation
Capital gains count toward the “combined income” calculation that determines what percentage of your Social Security benefits are subject to federal tax. A year with elevated capital gains—say, from a large asset sale—can push you above the thresholds that trigger 50% or 85% taxation of benefits. This is an important consideration when timing major asset sales or realizing gains.
Capital Gains and IRMAA
Similarly, capital gains count toward the Modified Adjusted Gross Income used to calculate IRMAA surcharges on Medicare premiums. A large gain in one year can trigger higher Medicare costs two years later, even if your spending and lifestyle have not changed at all. Awareness of IRMAA thresholds should be part of any significant asset sale decision.
Tax-Loss Harvesting in Retirement
Tax-loss harvesting—selling investments that have declined in value to realize a capital loss—can be a useful tool in a taxable account, even in retirement. Capital losses can offset capital gains dollar-for-dollar. If losses exceed gains in a given year, up to $3,000 of excess losses can be used to offset ordinary income, with any remaining loss carried forward to future years.
In practice, this means that a thoughtfully managed taxable portfolio can generate tax-loss harvesting opportunities during market downturns, reducing the tax cost of future gains or income. It is not a strategy that eliminates tax entirely, but it can meaningfully reduce the annual drag of investing in taxable accounts.
Asset Location: Putting the Right Investments in the Right Accounts
One additional consideration for retirees managing multiple account types is asset location—the practice of holding certain investments in accounts that provide the most favorable tax treatment for that asset’s income characteristics.
Broadly, the principle works like this:
- Tax-inefficient assets (bonds, REITs, actively managed funds with high turnover) are often better held in traditional IRA accounts, where interest income is sheltered until withdrawal.
- Tax-efficient assets (broad index funds, individual stocks held for the long term, municipal bonds) are often better held in taxable accounts, where long-term gains receive preferential treatment.
- High-growth assets with the longest time horizon may be well-suited for Roth accounts, where all growth and withdrawals are tax-free.
Asset location does not change what you own. It changes where you own it—and that can make a meaningful difference in after-tax returns over a long retirement.
Bringing the Pieces Together
The four posts in this April series—on tax risk, withdrawal sequencing, Roth conversions, and now the tax treatment of different income types—are all addressing the same underlying challenge: how do you design a retirement income strategy that is not just sustainable, but tax-efficient?
None of these strategies works in isolation. The optimal approach coordinates all of them:
- Drawing from accounts in a sequence that manages brackets year to year
- Converting pre-tax money during lower-income windows before RMDs begin
- Harvesting gains at favorable rates when the 0% window is available
- Managing IRMAA exposure by timing large income events carefully
- Locating assets in accounts that match their tax characteristics
The result is a retirement income plan that does not just protect against running out of money—it protects against leaving unnecessary tax dollars on the table along the way.
FAQ: What Is the Capital Gains Tax Rate for Retirees?
Long-term capital gains for retirees are taxed at 0%, 15%, or 20% at the federal level, depending on total taxable income. For 2025, the 0% rate applies to married couples with taxable income below approximately $94,050. The 15% rate applies above that threshold up to higher income levels. For most retirees with moderate income, the 15% rate applies to the majority of long-term gains, which is significantly lower than the ordinary income rates applied to IRA or 401(k) withdrawals. State taxes vary and may apply separately.
If you would like help understanding how your specific mix of income sources—IRA withdrawals, Social Security, taxable account gains—interact and how to structure them for maximum tax efficiency, this is one area where personalized planning pays for itself.
Schedule a complimentary retirement tax strategy consultation with our office. We will review your accounts, model your projected tax picture across retirement, and identify opportunities to reduce what you owe—year by year and over your lifetime.
