You may owe federal income tax on your Social Security benefits, depending on your other income

Social Security payments themselves are not taxed by the federal government. However, if your total income exceeds a certain threshold, the IRS requires you to include a portion of your benefits as taxable income on your federal tax return. This means you could owe taxes even if Social Security is your only source of income, depending on how much you receive and whether you have other earnings, pensions, or investment income.

The amount of your benefits that becomes taxable depends on your "combined income"—a calculation that includes your adjusted gross income, nontaxable interest, and half of your Social Security benefits. If this combined income falls below the IRS threshold for your filing status, you owe no federal tax on your benefits. If it exceeds the threshold, up to 50 percent or 85 percent of your benefits may be taxable, depending on how far over you go.

Key Takeaways

  • Social Security benefits are taxable only if your combined income (adjusted gross income plus nontaxable interest plus half your benefits) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • If you exceed the threshold, either 50 percent or 85 percent of your benefits become taxable income, depending on how much your combined income exceeds the limit.
  • You will receive a Form SSA-1099 each January showing the total benefits you received in the previous year, which you use to calculate your taxable amount.
  • Some states do not tax Social Security benefits at all, while others tax them under their own rules even if the federal government does not.

How the IRS calculates taxable Social Security income

The IRS uses a two-tier system to determine how much of your benefits are taxable. The first tier applies if your combined income is between the base threshold and a higher threshold. The second tier applies if your combined income exceeds the higher threshold.

For 2024, the thresholds are $25,000 for single filers, $32,000 for married couples filing jointly, and $0 for married couples filing separately (with rare exceptions). If your combined income is $25,500 as a single filer, for example, you are $500 over the first threshold. In this case, up to 50 percent of your benefits—but no more than half of the amount over the threshold—becomes taxable. If your combined income is $34,500, you have exceeded both thresholds, and up to 85 percent of your benefits may be taxable.

The calculation is complex because it involves multiple steps and depends on your specific income sources. The IRS provides a worksheet in the instructions for Form 1040 to help you work through it, or you can use tax software that performs the calculation automatically.

What counts as income for this calculation

Combined income includes your adjusted gross income (wages, self-employment income, taxable pensions, taxable interest, and taxable dividends), plus nontaxable interest (such as interest from municipal bonds), plus half of your Social Security benefits. It does not include certain types of income, such as Supplemental Security Income (SSI), which is a separate need-based program.

If you are still working while receiving Social Security, your wages count toward combined income. If you have a pension from a job where you did not pay Social Security taxes (such as some government jobs), that pension is included in the calculation. If you have investment income, capital gains, or rental income, those are included as well. The broader your income picture, the more likely your benefits will be taxable.

State taxes on Social Security benefits

Thirteen states tax Social Security benefits under their own rules: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The rules vary by state—some tax benefits the same way the federal government does, while others use different thresholds or percentages. A few states exempt benefits for residents over a certain age or with income below a certain level.

If you live in one of these states and your benefits are taxable at the federal level, check your state's tax instructions or contact your state tax authority to determine whether you owe state tax as well. If you live in a state with no income tax or a state that does not tax Social Security, you will not owe state tax on your benefits regardless of your federal situation.

How to report taxable Social Security on your tax return

In January of each year, the Social Security Administration sends you a Form SSA-1099 showing the total benefits you received in the previous year. You use this form to calculate how much of your benefits are taxable and report it on your federal tax return. The taxable portion goes on line 5b of Form 1040 (or the equivalent line on your state return if your state taxes benefits).

If you received benefits for only part of the year—for example, if you turned 62 and started receiving benefits in June—your Form SSA-1099 will show only the benefits you actually received. You will use that amount in your combined income calculation. If you did not receive a Form SSA-1099 by early February, contact the Social Security Administration to request a replacement.

What happens if you do not report taxable benefits

If your combined income exceeds the threshold and you owe tax on your benefits but do not report it, the IRS may assess penalties and interest on the unpaid tax. The Social Security Administration shares information with the IRS, so underreporting is likely to be detected. If you realize you missed reporting taxable benefits in a previous year, you can file an amended return (Form 1040-X) for that year to correct the error and reduce the penalties owed.

If you are unsure whether your benefits are taxable, it is safer to calculate the amount and report it than to skip it. A tax professional or the IRS can help you work through the calculation if you are uncertain.

Frequently Asked Questions

Can I reduce the amount of my Social Security that is taxable?

You cannot change how much of your benefits are taxable, but you can reduce your combined income by minimizing other income sources. For example, if you have the option to defer taking a pension or delaying investment income, doing so could lower your combined income and reduce the taxable portion of your benefits. Consult a tax professional about strategies specific to your situation.

What if I receive both Social Security and SSI?

SSI (Supplemental Security Income) is a separate, need-based program and does not count toward combined income for the purpose of determining whether your Social Security benefits are taxable. Only your Social Security benefits are included in the calculation. However, SSI itself is not taxable income.

Do I have to file a tax return if my only income is Social Security?

If your combined income is below the threshold for your filing status, you do not have to file a federal tax return. However, if your combined income exceeds the threshold, you must file to report the taxable portion of your benefits. Some people file even when not required to claim a refund of taxes withheld.

Will my tax refund be reduced if I owe back taxes on Social Security?

If you owe back taxes on Social Security benefits from a previous year, the IRS may offset your current-year refund to pay down that debt. This is called "offset" or "levy." You will receive notice before this happens. If you disagree with the offset, you can request a hearing with the IRS.

Does working part-time while on Social Security affect my taxes?

Yes. Wages from part-time work count as income in your combined income calculation, which may push your benefits into the taxable range. Additionally, if you are under full retirement age and earn above a certain limit, Social Security may reduce your monthly benefit amount—a separate rule from taxation. Check the Social Security Administration's website for current earnings limits.