Whether you pay taxes on Social Security depends on your other income

You may owe federal income tax on your Social Security benefits if your total income exceeds a certain threshold. The IRS uses a formula called "combined income" to determine this — it adds your adjusted gross income, nontaxable interest, and half of your Social Security benefits. If that total crosses the line for your filing status, a portion of your benefits becomes taxable.

The thresholds have not changed since 1984. For single filers, the first threshold is $25,000; for married filing jointly, it is $32,000. A second threshold exists at $34,000 for single filers and $44,000 for married filing jointly — crossing this higher line means up to 85 percent of your benefits may be taxable. Most people who work part-time in retirement or have pension income will cross at least the first threshold.

State and local taxes are separate. Some states do not tax Social Security at all, while others tax it the same way the federal government does. Check your state's rules directly, as they vary widely.

Key Takeaways

  • You owe federal tax on Social Security only if your combined income (wages, pensions, interest, plus half your benefits) exceeds $25,000 for single filers or $32,000 for married filing jointly.
  • The IRS uses a two-tier system: crossing the first threshold makes up to 50 percent of benefits taxable; crossing the second makes up to 85 percent taxable.
  • Part-time work, pensions, and investment income all count toward the combined income threshold, not just Social Security itself.
  • State tax treatment of Social Security varies by state — some exempt it entirely, while others follow federal rules or have their own thresholds.
  • You can request that the Social Security Administration withhold taxes from your monthly payment to avoid a surprise bill at tax time.

How the IRS calculates combined income

Combined income is the number the IRS actually looks at, not your Social Security benefit alone. Start with your adjusted gross income (AGI) — this is your wages, self-employment income, pensions, and taxable interest minus certain deductions. Then add back any nontaxable interest (usually from municipal bonds) and half of your Social Security benefits for the year.

Example: You are single and receive $20,000 in Social Security. You also have $15,000 in pension income and $3,000 in taxable interest. Your combined income is $15,000 + $3,000 + ($20,000 × 0.5) = $23,000. You are below the $25,000 threshold, so none of your benefits are taxable.

Change the numbers slightly: same situation but your pension is $18,000 instead. Now combined income is $18,000 + $3,000 + $10,000 = $31,000. You crossed the first threshold of $25,000 by $6,000. The IRS taxes the lesser of (1) half your benefits or (2) half the amount over the threshold. Half your benefits is $10,000; half the overage is $3,000. You pay tax on $3,000 of your $20,000 benefit.

The two-tier tax system and how much becomes taxable

The first tier applies when combined income exceeds $25,000 (single) or $32,000 (married filing jointly). At this level, up to 50 percent of your benefits can be taxed. The second tier kicks in at $34,000 (single) or $44,000 (married filing jointly), and up to 85 percent of your benefits can be taxed.

The math for the second tier is more complex. If you cross the second threshold, the IRS calculates tax in two steps: first, any amount between the first and second threshold is taxed at the 50 percent rate; then, any amount above the second threshold is taxed at the 85 percent rate. The result is that high-income retirees can have most of their Social Security taxed, though never more than 85 percent.

Example: You are married filing jointly with $50,000 in combined income. Your first $12,000 over the first threshold ($32,000) is taxed at 50 percent, meaning $6,000 of benefits are taxable. Your remaining $6,000 over the second threshold ($44,000) is taxed at 85 percent, meaning $5,100 of benefits are taxable. Total taxable: $11,100 of your Social Security.

Types of income that count toward the threshold

The threshold is based on combined income, which includes far more than just Social Security. Wages from part-time work, self-employment income, pensions (including military pensions), taxable interest, dividends, capital gains, and rental income all count. Distributions from traditional IRAs and 401(k)s count too, whether you needed the money or not.

Some income does not count. Supplemental Security Income (SSI), veterans benefits, workers' compensation, and certain other needs-based programs are excluded. Roth IRA withdrawals do not count either, which is one reason some retirees convert traditional IRAs to Roth accounts before claiming Social Security.

If you are still working when you claim Social Security, your wages push you over the threshold almost immediately. This is a major reason many people delay claiming until after they stop working — it reduces the chance that their benefits will be taxed.

State tax treatment varies widely

Thirteen states do not tax Social Security at all: Alaska, Florida, Illinois, Iowa, Kansas, Louisiana, Maine, Mississippi, Missouri, Nevada, South Dakota, Tennessee, and Wyoming. If you live in one of these states, you owe no state income tax on your benefits regardless of your income level.

Most other states follow the federal system closely — they tax Social Security the same way the IRS does. A handful of states have their own rules: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont all have different thresholds or percentages than the federal government. Some offer exemptions for people over a certain age or with income below a certain level.

Check your state's tax authority website or ask a tax professional familiar with your state's rules. The rules change occasionally, and a few states have phased out Social Security taxation over time.

Withholding taxes from your Social Security payment

You can ask the Social Security Administration to withhold federal income tax from your monthly benefit payment. This is done using Form W-4V, which you submit to your local Social Security office or mail to the address on the form. You choose the withholding rate: 7, 10, 15, or 25 percent.

Withholding does not change how much tax you owe — it just spreads the payment across the year instead of leaving you with a bill in April. Many people find this easier than making quarterly estimated tax payments or facing a large balance due. You can change your withholding rate at any time by submitting a new W-4V.

If you do not withhold and you owe tax, you may face a penalty for underpayment of estimated tax. The penalty is small for most people, but it adds to your bill. Withholding is the simplest way to avoid it.

Planning ahead if you are close to the threshold

If your combined income is near the first threshold, small changes can make a difference. Delaying Social Security by even one year reduces the amount you receive annually, which lowers combined income. Roth conversions in years before you claim Social Security do not count toward the threshold (though the conversion itself is taxable that year). Charitable donations, if you itemize, reduce AGI and combined income.

Some people coordinate the timing of large income events — like selling a rental property or taking an IRA distribution — to avoid crossing the threshold in a single year. A tax professional can model different scenarios and show you the long-term cost of each choice.

If you are still working, the decision to claim Social Security early versus late is partly a tax question. Claiming at 62 means lower monthly benefits but also lower combined income in those early years. Waiting until 70 means higher benefits but higher combined income while you work. The break-even point depends on your specific situation.

Frequently Asked Questions

If I have not worked in years and only receive Social Security, do I owe tax?

Probably not. If Social Security is your only income, your combined income is half your benefit amount. You would need to receive more than $50,000 in Social Security annually (as a single filer) to cross the first threshold. Most people receive less, so they owe no federal tax. Check your state's rules separately.

Does my spouse's income count toward my threshold?

No. Each person's combined income is calculated separately, even if you file jointly. However, married couples filing jointly have a higher threshold ($32,000 instead of $25,000), which helps when both spouses receive Social Security. If only one spouse works, that spouse's income does not affect the other's threshold.

What if I owe tax but cannot pay it all at once?

The IRS offers payment plans for tax owed on Social Security. You can request an installment agreement online, by phone, or on your tax return. The IRS will also accept an offer in compromise if you truly cannot pay, though this is harder to obtain. Start by contacting the IRS or working with a tax professional.

Can I reduce my combined income by donating to charity?

Only if you itemize deductions instead of taking the standard deduction. Charitable donations reduce your AGI, which lowers combined income. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married filing jointly. If your deductions do not exceed these amounts, charity donations will not help your tax situation.

If I delay claiming Social Security, does that help with taxes?

Yes, in two ways. First, you receive a smaller annual benefit, which lowers combined income. Second, if you are still working, delaying until you stop work means your wages do not push you over the threshold. The tax savings can be significant, though you receive fewer total benefits over your lifetime if you live an average lifespan.