Most people do not owe federal income tax on Social Security, but some do

Whether you pay federal income tax on Social Security depends on your total income for the year. If Social Security is your only income, you will not owe federal tax. If you have other income — from a job, a pension, investments, or other sources — you may owe tax on part of your Social Security benefits.

The IRS uses a formula called "combined income" to decide how much of your benefit is taxable. Combined income means your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. If your combined income exceeds a certain threshold, you will report some of your benefits as taxable income on your federal return.

The thresholds are the same whether you file as single, married filing jointly, or another status — they do not change with inflation. For 2024, the first threshold is $25,000 for single filers and $32,000 for married couples filing jointly. The second threshold is $34,000 for single filers and $44,000 for married couples filing jointly.

Key Takeaways

  • If your combined income stays below $25,000 (single) or $32,000 (married filing jointly), you owe no federal tax on your Social Security benefits.
  • Combined income includes your adjusted gross income, nontaxable interest, and half your Social Security benefits — not just your benefits alone.
  • Between the first and second threshold, up to 50 percent of your benefits may be taxable; above the second threshold, up to 85 percent may be taxable.
  • You must file a federal tax return to report taxable benefits, even if you normally would not have to file.
  • Some states also tax Social Security benefits, but most do not; check your state's rules separately.

How the IRS calculates taxable benefits

The calculation happens in two steps. First, add your adjusted gross income (wages, pensions, interest, dividends, rental income, and other sources) plus any nontaxable interest (usually from municipal bonds) plus half your Social Security benefits. That sum is your combined income.

Next, compare your combined income to the thresholds. If you are single and your combined income is between $25,000 and $34,000, you may have to report up to 50 percent of your benefits as taxable income. If your combined income exceeds $34,000, you may have to report up to 85 percent of your benefits as taxable income.

The exact amount depends on how far above the threshold you are. The IRS publishes a worksheet in the instructions to Form 1040 that walks through the calculation. You can also use the Social Security Administration's online calculator or ask a tax preparer to work through it with you.

When you must file a federal tax return

You must file a federal tax return if your combined income exceeds the threshold for your filing status, even if you would not normally have to file. For example, if you are single, have no other income, and receive $26,000 in Social Security benefits, your combined income is $26,000 plus half of $26,000 ($13,000), which equals $39,000 — well above the $25,000 threshold. You must file a return.

If you do not file when you are required to, you may face penalties and interest. The IRS does not automatically calculate your tax on Social Security benefits; you or your tax preparer must report it on your return.

You can file electronically for free through IRS Free File if your income is below a certain level, or you can use tax software, hire a preparer, or file by mail with Form 1040 and Schedule 1.

State income tax on Social Security benefits

Most states do not tax Social Security benefits at all. However, a small number of states do tax some or all of your benefits, and the rules vary widely. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont all tax Social Security benefits under certain conditions.

Each state has its own income thresholds and rules about which benefits are taxable. Some states exempt benefits entirely for people over a certain age or with income below a threshold. You will need to check your state's tax agency website or ask a tax preparer familiar with your state's rules.

If you live in a state that taxes Social Security, you will report the taxable portion on your state tax return, separate from your federal return. The amount you owe to the state may differ from what you owe to the IRS.

Withholding and estimated tax payments

If you know you will owe federal tax on your Social Security benefits, you can ask the Social Security Administration to withhold taxes from your benefit payments. You do this by completing Form W-4V and submitting it to Social Security. You can choose to have 7, 10, 12, or 22 percent of your benefit withheld each month.

Withholding is optional, but it can help you avoid owing a large amount when you file your return. If you have other income and expect to owe tax, withholding from your Social Security benefits may be simpler than making quarterly estimated tax payments.

You can change your withholding at any time by submitting a new Form W-4V to Social Security. If you want to stop withholding, you can do that too.

What happens if you do not report taxable benefits

The Social Security Administration reports the total amount of benefits you received to the IRS on Form SSA-1099. The IRS uses this information to cross-check tax returns. If you do not report taxable benefits on your return when you should have, the IRS will likely catch the discrepancy and send you a notice.

You may owe back taxes, plus interest and penalties. The penalty for not filing a required return is usually 5 percent of the unpaid tax for each month the return is late, up to 25 percent. Interest accrues daily on any unpaid tax.

If you made an honest mistake, you can file an amended return (Form 1040-X) to correct it. The sooner you file the amended return, the less interest will accrue.

Frequently Asked Questions

Can I reduce my taxable Social Security benefits by earning less?

Yes, but only if you can actually reduce your other income. Since combined income includes half your benefits, lowering your wages, pension, or investment income will lower your combined income and may reduce the amount of benefits subject to tax. However, you cannot reduce your Social Security benefits themselves to avoid taxation — that would defeat the purpose.

Do I have to pay tax on my spouse's Social Security benefits?

No. You report only your own benefits on your tax return. Your spouse reports theirs on their return. However, if you file jointly, your combined income includes both your benefits and your spouse's benefits, which may push you over the threshold and make some of each person's benefits taxable.

What if I worked and paid Social Security taxes — why do I have to pay income tax on my benefits too?

Social Security taxes (the 6.2 percent withheld from your paycheck) fund the Social Security program itself; they are separate from federal income tax. Federal income tax is a separate tax on your total income. The IRS taxes benefits because they are considered income in the year you receive them, just like a pension or other retirement income would be.

Does the tax on Social Security benefits count toward my Medicare premiums?

No. Your Medicare Part B and Part D premiums are based on your modified adjusted gross income (MAGI) from two years prior, not on the amount of tax you owe. However, MAGI does include your Social Security benefits, so having taxable benefits can affect your Medicare costs.

Can I deduct my Social Security taxes on my federal return?

No. Social Security taxes are not deductible. However, if you are self-employed, you can deduct half of your self-employment tax (which includes the employer and employee portions of Social Security tax) as an adjustment to income on your tax return.