If you're worried the IRS will tax your Social Security, the honest answer is maybe, but never all of it. At most, 85 percent of your benefits can be counted as taxable income, and plenty of retirees owe nothing at all. Whether your benefits are taxed comes down to one number, your combined income.

There's also a 2025 tax break for people 65 and older that's easy to misread, and it's worth understanding what it really does before you count on it.

In This Guide

Is Social Security Taxable? The Short Answer

For a lot of people, some of it is. Social Security benefits can be subject to federal income tax, but only above a certain income, and the law caps how much of your benefit can ever be taxed at 85 percent. That cap is worth holding onto: no matter how high your income, at least 15 percent of your Social Security is always tax-free.

If Social Security is most or all of your income, you likely owe no federal tax on it at all. The tax kicks in when you have meaningful income on top of your benefits, from a pension, a job, retirement account withdrawals, or investments.

There is one filing status where that comfort doesn't apply. If you're married filing separately and you lived with your spouse at any time during the year, your base amount is $0, so there is no income floor below which your benefits go untaxed. That branch is spelled out below, and it's the one most likely to catch a separated spouse off guard.

What "Combined Income" Means

The whole question turns on a figure the IRS calls combined income. It's simpler than it sounds: take half of your Social Security benefits for the year and add your other income. That other income includes pensions, wages, and withdrawals from a traditional IRA or 401(k), plus any tax-exempt interest.

How Much of Your Social Security Is Taxable

Once you have your combined income, two thresholds decide how much of your benefit is taxed. Below the first, none of it is. Between the two, up to half. Above the second, up to the 85 percent maximum.

Your filing status Up to 50% taxable when combined income is over Up to 85% taxable when combined income is over
Single, head of household, or qualifying surviving spouse $25,000 $34,000
Married filing jointly $32,000 $44,000

So a filer who is single, head of household, or a qualifying surviving spouse owes no tax on their benefits when combined income is $25,000 or less; above $25,000 and up to $34,000, up to half of the benefits can be taxed; above $34,000, up to 85 percent. A couple filing jointly runs the same three tiers at $32,000 and $44,000. The comparison is to exceeding the threshold, so landing exactly on $25,000 leaves you in the tier below, not above it.

One thing that quietly matters: these thresholds are set in statute and are not indexed for inflation, so they do not rise over time.

The New 2025 Break for Seniors

A 2025 law, the One Big Beautiful Bill Act, created an extra deduction for older taxpayers. For tax years 2025 through 2028, if you're 65 or older, you can claim an additional deduction of $6,000, or $12,000 for a married couple who both qualify. You can take it whether or not you itemize, and it's on top of the standard deduction seniors already get.

The important distinction to get right: this is a deduction, not a repeal. It lowers the income your tax is figured on, which for many lower- and middle-income seniors reduces or wipes out the tax they'd owe on their benefits. But Social Security itself is still taxable under the same rules. The deduction also phases out for higher earners, starting at $75,000 of modified adjusted gross income, or $150,000 for a couple filing jointly. Because it's new and set to expire after 2028, confirm the current details with the IRS before you count on it.

What About State Taxes?

This guide is about federal tax. Whether your state also taxes Social Security is a separate question, and the answer depends on where you live. Our guide on retirement income tax by state walks through how each state treats retirement income.

How to Figure Your Own Number

You don't have to guess. The IRS publishes a worksheet, Worksheet A in Publication 915, that walks you line by line from your combined income to the exact taxable amount. If your situation is simple, it takes a few minutes. If you have a pension, investment income, or you're weighing the senior deduction, a tax preparer can run the numbers and tell you what to expect, so a tax bill in April doesn't catch you off guard.

Frequently Asked Questions

How much of my Social Security is taxable?

Between zero and 85 percent, depending on your combined income (one-half of your benefits plus your other income) and your filing status. Below the first threshold none is taxed; above the second, up to 85 percent is, and never more. That first threshold is $25,000 for a single, head-of-household, or qualifying-surviving-spouse filer and $32,000 on a joint return, but it is $0 for someone married filing separately who lived with their spouse at any time during the year, which makes their benefits taxable from the first dollar.

Did the 2025 law make Social Security tax-free?

No. It added a deduction of $6,000 per qualifying person age 65 or older for tax years 2025 through 2028, which is $12,000 for a married couple where both spouses qualify. The deduction lowers taxable income and can reduce or wipe out the tax on your benefits, but Social Security is still taxed under the same rules.

At what income do I start owing tax on Social Security?

It depends on your filing status. For a single, head-of-household, or qualifying-surviving-spouse filer, when combined income (half your benefits plus your other income) tops $25,000; for a married couple filing jointly, $32,000; for someone married filing separately who lived apart from their spouse for the entire year, $25,000. If you're married filing separately and lived with your spouse at any time during the year, there is no threshold to clear at all: your base amount is $0, and your benefits are taxable from the first dollar.

Learn More

FinancialWhen to Claim Social SecurityWhen to claim Social Security: the 62 vs. 67 vs. 70 math, how claiming more can affect your Medicaid, a spouse's benefits, and the survivor switch. FinancialSocial Security Spousal BenefitsA Social Security spousal benefit pays up to half your spouse's at full retirement age. How much you get, whether you can also take your own, and the key rule. FinancialRetirement Income Tax by StateRetirement income tax varies enormously by state. Learn how states treat Social Security, pensions, and IRA or 401(k) money, and find your state's rules. FinancialHow to Pay for Senior CareHow to pay for senior care: what it costs nationally and how Medicaid, Medicare, VA benefits, and private pay each fit. Who qualifies, what's covered, in 2026.

Find personalized help understanding the taxes on your Social Security at brevy.com.

The information on Brevy.com is for educational purposes only and is not a substitute for professional legal, financial, or medical advice. Rules vary by state and program and change frequently. Always verify with the relevant agency or a qualified professional. Brevy is not a law firm, financial advisor, or healthcare provider.

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Brevy Care Team

Expert eldercare guidance from Brevy's team of healthcare professionals and researchers.