Social Security is income, but not always taxable income
Whether you owe federal income tax on your Social Security depends on your combined income — that is, your Social Security plus other money you earned or received that year. If your combined income stays below a certain threshold, you pay no federal tax on your benefits. If it goes above that threshold, you may owe tax on part of your benefits, but never on all of them.
The thresholds are the same whether you're single or married filing jointly: $25,000 for single filers and $32,000 for married couples filing jointly. These numbers have not changed since 1984, so they catch more people now than they did then. If your combined income exceeds the threshold, you'll owe tax on up to 85 percent of your benefits — not the full amount.
Combined income means your adjusted gross income plus nontaxable interest plus half your Social Security benefits. This is the number the IRS uses to decide whether you cross the threshold, not your gross earnings alone.
Key Takeaways
- Combined income above $25,000 (single) or $32,000 (married filing jointly) may trigger federal tax on part of your Social Security benefits.
- Combined income includes your adjusted gross income, nontaxable interest, and half your Social Security benefits — not just your wages.
- Even if you owe tax on your benefits, you never pay tax on more than 85 percent of what you received.
- State income tax on Social Security varies by state; 13 states tax Social Security benefits under certain conditions.
- Social Security counts as income for other programs like Supplemental Security Income (SSI) and Medicaid, which have their own income limits.
How to calculate your combined income
Start with your adjusted gross income (AGI) — the number on line 11 of your 1040 tax form. Add any nontaxable interest you earned, such as interest from municipal bonds. Then add half of your Social Security benefits for the year.
For example: if your AGI is $18,000, you have $500 in nontaxable interest, and you received $12,000 in Social Security, your combined income is $18,000 + $500 + $6,000 = $24,500. You're below the $25,000 threshold, so you owe no federal tax on your benefits.
If that same person earned an extra $2,000 in part-time work, the combined income becomes $26,500. Now they're $1,500 over the threshold. The IRS would tax up to 50 percent of the excess ($750) or 85 percent of the benefits ($10,200), whichever is less — in this case, $750.
State taxes on Social Security
Thirteen states tax Social Security benefits under certain conditions: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The rules vary widely — some states use the same federal thresholds, others use different income limits, and some exempt benefits for people over a certain age.
Colorado, Kansas, and Nebraska have phased out their taxes on Social Security, meaning fewer people pay state tax on benefits each year. If you live in one of these states, check your state revenue department's website or call to learn the current rules for your situation.
The remaining 37 states do not tax Social Security benefits at all, regardless of your income.
Social Security as income for other programs
Social Security counts as income for Supplemental Security Income (SSI), which is a needs-based program for people over 65, blind, or disabled with limited resources. SSI has a monthly income limit of $943 for individuals and $1,415 for couples (2024 figures, which change yearly). If your Social Security alone exceeds this limit, you won't receive SSI, though you may still be able to receive Medicaid.
Social Security also counts toward income limits for Medicaid in most states. The limit varies by state and by whether you're explore for regular Medicaid or a special program like Medicaid for the Elderly and Disabled. Some states have higher limits than others, and some programs count only part of your Social Security.
If you're receiving SSI or explore for Medicaid, report your Social Security amount when you explore. The program will tell you whether it affects your benefits.
Working while receiving Social Security
If you're under your full retirement age and still working, Social Security counts your wages as income and may reduce your monthly benefit. For every $2 you earn above the annual limit ($23,400 in 2024), Social Security withholds $1 from your benefits. The limit changes yearly.
Once you reach your full retirement age, you can earn as much as you want without losing benefits. Wages don't affect your monthly payment, though they do count toward your combined income for tax purposes.
Self-employment income counts the same way as wages. If you own a business, report your net profit on your tax return, and Social Security will count that toward the earnings limit.
Other income that affects your Social Security taxes
Pensions, interest, dividends, rental income, and capital gains all count toward your combined income for the purpose of determining whether you owe tax on your benefits. Distributions from traditional IRAs and 401(k)s count as well. Distributions from Roth IRAs do not count, because they're not taxable income.
Gifts and inheritances do not count as income for Social Security tax purposes. Neither do returns of your own principal from savings accounts or investments — only the earnings count.
If you're married and file jointly, your spouse's income counts toward the combined income threshold, even if your spouse doesn't receive Social Security. This can push a couple over the threshold when either person alone would stay below it.
How to report Social Security on your tax return
The Social Security Administration sends you a Form SSA-1099 by January 31 each year showing how much you received. Use this form to fill out your 1040 tax return. If you owe tax on your benefits, you'll report it on lines 5a and 5b of the 1040.
If you're unsure whether you owe tax, use the IRS worksheet in Publication 915, "Social Security and Equivalent Railroad Retirement Benefits." The worksheet walks you through the calculation step by step. You can read it from the IRS website or request a paper copy by phone.
If you expect to owe tax on your benefits, you can ask Social Security to withhold federal income tax from your monthly payment. Complete Form W-4V and send it to your local Social Security office. This way you won't owe a large amount when you file your return.
Frequently Asked Questions
Do I have to pay federal income tax on all my Social Security?
No. You pay tax on up to 85 percent of your benefits, and only if your combined income exceeds the threshold ($25,000 for single filers, $32,000 for married couples filing jointly). Many people pay no federal tax on their benefits at all.
What if I'm married but file separately?
If you're married and file a separate return, the threshold drops to $0 — meaning you'll owe tax on your benefits if you have any combined income at all. The IRS strongly discourages filing separately for this reason. Talk to a tax professional about your situation.
Can I reduce my combined income to avoid taxes on Social Security?
You can lower your combined income by reducing other income sources — for example, by withdrawing less from your IRA or selling fewer investments. However, Roth conversions and charitable contributions don't reduce combined income the way they reduce regular taxable income. A tax professional can help you plan withdrawals and other moves to minimize taxes.
Does Social Security count as income for Medicare premiums?
Yes. Social Security is counted as income when determining your Medicare Part B and Part D premiums. Higher income can result in higher premiums through a process called Income-Related Monthly Adjustment Amounts (IRMAA). The income threshold for IRMAA is higher than the threshold for federal income tax on benefits.
What if I didn't report my Social Security income on a past tax return?
Contact the IRS or a tax professional. You may be able to file an amended return using Form 1040-X. The IRS has a statute of limitations, but it's better to correct the error than to wait. If you owe back taxes, you may also owe interest and penalties, but the amount is usually smaller if you file the amended return yourself rather than waiting for the IRS to contact you.