Sources: IRS, SEC, Federal Reserve, U.S. Bureau of Labor Statistics & U.S. Census Bureau. See our editorial standards.
Calculate how much of your 2026 Social Security benefits are taxable based on income. Free calculator with provisional income thresholds and tax tips.
Up to 85% of your Social Security benefits can be taxed, but most retirees pay tax on far less — and roughly 40% of beneficiaries pay nothing at all. The exact share depends on your "combined income," a specific IRS formula that adds half your benefits to your other income. Below 25,000 (single) or 32,000 (married filing jointly), your benefits are 100% tax-free. Above those thresholds, either 50% or 85% of your benefits become taxable — never more than 85%.
Use the calculator below to estimate your taxable amount, then read on to understand the thresholds, see worked examples, and learn the strategies that legally shrink the bill.
The entire calculation hinges on one number the IRS calls combined income (also called provisional income). The formula is simple:
Combined income = Adjusted Gross Income (excluding Social Security) + Tax-exempt interest + 50% of your Social Security benefits
Notice that even tax-exempt municipal bond interest counts here — a detail that surprises many retirees who buy munis specifically to lower taxes. Your combined income is then measured against two threshold tiers that have not been adjusted for inflation since 1984, which is why more retirees cross them every year.
These base amounts are set by statute and remain unchanged for the 2026 tax year:
| Filing status | 0% of benefits taxed | Up to 50% taxed | Up to 85% taxed |
|---|---|---|---|
| Single / Head of Household | Below $25,000 | $25,000 – $34,000 | Above $34,000 |
| Married Filing Jointly | Below $32,000 | $32,000 – $44,000 | Above $44,000 |
| Married Filing Separately* | $0 | — | Above $0 |
*If you're married filing separately and lived with your spouse at any point during the year, up to 85% of your benefits are taxable from the first dollar — there is no protected zone.
Critically, the percentages describe how much of your benefit enters your taxable income, not a tax rate. If you're in the 22% federal bracket and 85% of a $30,000 benefit ($25,500) is taxable, your actual extra tax is roughly $25,500 × 22% = $5,610 — not 85% of your benefit.
Margaret is single, collects $22,000 in Social Security, and withdraws $8,000 from a Roth IRA (Roth withdrawals don't count toward combined income). Her combined income is $8,000 + $11,000 (half her benefit) = $19,000 — below the $25,000 threshold. None of her benefits are taxable.
James and Linda file jointly. They receive $36,000 in combined benefits and take $14,000 from a traditional IRA. Combined income = $14,000 + $18,000 = $32,000, which is exactly at the lower married threshold. Just above it, only the 50% tier applies, so a small slice of their benefits becomes taxable. Their effective tax on benefits is minimal.
David is single with $30,000 in benefits, a $40,000 pension, and $10,000 in IRA withdrawals. Combined income = $50,000 + $15,000 = $65,000 — well above $34,000. The calculator returns roughly $25,500 taxable, the maximum 85%. This is the most common situation for retirees with pensions or substantial required minimum distributions.
There's a brutal quirk in this formula. In the income range where benefits transition from 50% to 85% taxable, every additional $1,000 you withdraw can make up to $850 of previously untaxed Social Security newly taxable. The result: a retiree nominally in the 12% bracket can face a marginal rate of 22% or higher on ordinary withdrawals. Financial planners call this the "tax torpedo." It's why the timing and sequencing of withdrawals matters enormously — see our take-home pay calculator for how marginal rates compound across income sources.
The good news: as of 2026, the large majority of states do not tax Social Security benefits. A shrinking handful still do, often with generous income-based exemptions. West Virginia is phasing out its tax entirely, and several states eliminated theirs in recent years. If you live in a state that taxes benefits, check whether your income falls under the exemption ceiling before assuming you owe. Even in taxing states, low- and middle-income retirees frequently qualify for a full exemption.
Social Security won't withhold tax automatically. You can file Form W-4V to have 7%, 10%, 12%, or 22% withheld from each check, or make quarterly estimated payments to the IRS. Retirees who skip both often face an underpayment penalty in April. If a meaningful portion of your benefit is taxable, electing voluntary withholding is the simplest way to avoid a surprise bill.
No. If Social Security is your sole source of income, your combined income equals just half your benefits — far below the $25,000 (single) or $32,000 (married) threshold. None of it is taxable, and in most cases you won't even need to file a federal return.
85%. No matter how high your income, the IRS never taxes more than 85% of your Social Security benefits. The remaining 15% is always tax-free. Remember this is the share added to taxable income, not the tax rate applied.
No. Qualified Roth IRA and Roth 401(k) withdrawals are excluded from the combined-income formula entirely. This makes Roth accounts one of the most powerful tools for keeping your benefits tax-free, which is why pre-retirement Roth conversions are so valuable.
Not directly. Despite headlines, the underlying combined-income formula and the 50%/85% thresholds remain in place for 2026. Some retirees benefit from an enhanced standard deduction for seniors, which can reduce or erase the tax owed, but the taxability calculation itself is unchanged. Always run your own numbers with the calculator above.
No — and this surprises many investors. Tax-exempt interest is explicitly added back into your combined income for this calculation. Municipal bonds avoid income tax on the interest itself, but they can still push more of your Social Security into the taxable column.
Whether your Social Security is taxed comes down to one number — combined income — and two fixed thresholds that haven't moved in 40 years. Run your figures through the calculator above, then use Roth conversions, QCDs, and smart withdrawal sequencing to keep more of your benefit. Even modest planning in your 60s can shift you from the 85% tier to the tax-free zone for decades. For the full retirement-income picture, pair this with our RMD calculator and capital gains tax calculator.
This content is for educational purposes only and does not constitute financial advice. Tax rules are complex and individual situations vary. Consult a qualified financial advisor or tax professional before making decisions.
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