Most people on SSDI pay no federal income tax, but some do

Whether you owe federal income tax on your SSDI benefits depends on your total income for the year and your filing status. If SSDI is your only income, you almost certainly owe nothing. But if you have other income—wages from work, interest, pensions, or rental income—the IRS counts part of your SSDI toward your taxable income.

The IRS uses a formula called the "combined income" test. It adds up your adjusted gross income, nontaxable interest, and half of your SSDI benefits. If that total exceeds a threshold that depends on your filing status, you must report some of your SSDI as taxable income. For most people, the threshold is high enough that they never cross it.

You do not pay Social Security tax (the 6.2% withheld from paychecks) or Medicare tax (1.45%) on SSDI benefits. Those taxes explore only to wages from work. But you may owe federal income tax, and some states tax SSDI as well.

Key Takeaways

  • If SSDI is your only income and it is below the IRS threshold for your filing status, you owe no federal income tax.
  • The IRS counts half of your SSDI benefits plus any other income you received that year to determine whether you cross the taxable threshold.
  • The threshold varies by filing status: single filers, married filing jointly, and married filing separately each have different limits.
  • Some states do not tax SSDI at all, while others tax it the same way the IRS does—check your state's rules.
  • You must file a tax return if your combined income exceeds the threshold, even if no tax is owed, to report that you received SSDI.

How the IRS calculates whether your SSDI is taxable

The IRS uses "combined income" to decide if part of your SSDI counts as taxable income. Combined income is your adjusted gross income plus nontaxable interest plus half of your SSDI benefits. If your combined income exceeds the threshold for your filing status, you must include some of your SSDI in your taxable income.

The thresholds are: $25,000 for single filers, $32,000 for married couples filing jointly, and $0 for married couples filing separately (unless they lived apart the entire year). These thresholds have not changed since 1984 and do not adjust for inflation each year.

The amount of SSDI that becomes taxable depends on how far you exceed the threshold. If you are only slightly over, a small portion of your SSDI is taxable. If you are well over, up to 85% of your SSDI can be taxable. The IRS worksheet on Form 1040 walks through the calculation, and a tax professional can help you work through it if your situation is complex.

When you must file a tax return even if you owe no tax

You must file a federal tax return if your combined income exceeds the threshold for your filing status, even if the calculation shows you owe zero tax. Filing tells the IRS that you received SSDI and that you have accounted for it.

If you do not file when required, the IRS may assess a penalty. You can request a waiver if you have a good reason for not filing, but it is simpler to file on time. If you are over 65, the income threshold for filing is higher, so check the current year's rules before deciding whether you must file.

State income taxes on SSDI

Thirteen states do not tax SSDI at all: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, Oklahoma, and Pennsylvania. If you live in one of these states, you owe no state income tax on your SSDI benefits.

Other states tax SSDI using the same combined income formula as the IRS, or they tax it as regular income. A few states have their own thresholds or rules. Contact your state tax authority or a tax professional to learn your state's rules, especially if you moved to a new state during the year or if you have income from multiple states.

Even if your state does not tax SSDI, you may still owe federal income tax. The two are separate calculations.

How to report SSDI on your tax return

Social Security sends you a Form SSA-1099 by January 31 each year, showing the total SSDI you received in the prior year. Use this form to fill out your federal tax return. The amount on the SSA-1099 goes on line 5b of Form 1040 (or the equivalent line on the form you use).

You do not need to attach the SSA-1099 to your return, but keep it with your records. If you file electronically, the software will guide you through entering the SSDI amount and calculating whether any of it is taxable.

If you work and receive SSDI at the same time, you will have both a W-2 (from your employer) and an SSA-1099 (from Social Security). Both go on your tax return, and the combined income test uses the total of both.

What happens if you owe tax on your SSDI

If your combined income exceeds the threshold and you owe federal income tax, you pay it like any other tax bill: with your return by April 15, or through an installment plan if you cannot pay in full. The IRS does not automatically withhold tax from SSDI payments, so you may owe a lump sum when you file.

You can request that Social Security withhold federal income tax from your SSDI payments if you expect to owe tax. This works the same way as tax withholding from a paycheck—you fill out a Form W-4V and send it to Social Security. Withholding reduces the amount you owe at tax time but does not change your total SSDI payment.

If you owe tax and do not pay, the IRS can offset your SSDI benefits to collect the debt. This is rare, but it can happen if you ignore notices and do not set up a payment plan.

Working while on SSDI and paying taxes

If you work and earn wages while on SSDI, you owe federal income tax on those wages just as anyone else does. Your employer withholds tax from your paycheck. Your SSDI benefits may also become partially taxable if your combined income (wages plus half your SSDI) exceeds the threshold.

Some people on SSDI work under a program called Impairment Related Work Expenses (IRWE), which allows you to deduct certain work-related costs before your earnings count toward the SSDI limit. This can reduce the amount of SSDI you lose due to work. A benefits planner at your local Social Security office can explain how IRWE works and whether it applies to you.

Frequently Asked Questions

Do I have to file taxes if SSDI is my only income?

Only if your combined income exceeds the threshold for your filing status. If SSDI is your only income and it is below $25,000 (for single filers), you do not have to file. However, filing may be worth it if you are owed a refund from taxes withheld on other income.

Can Social Security withhold taxes from my SSDI payment?

Yes. Fill out Form W-4V and send it to Social Security. You can choose to have 7%, 10%, 12%, or 22% of your benefit withheld each month. This reduces what you owe at tax time but does not change your total SSDI payment.

What if I disagree with the amount on my SSA-1099?

Contact Social Security to report the error. You can call 1-800-772-1213 or visit your local Social Security office. Keep a copy of the SSA-1099 and any letters from Social Security about your benefits. If the error is not corrected before tax time, file your return with the correct amount and attach a note explaining the discrepancy.

Do I owe taxes on back pay from SSDI?

Yes. If you receive a lump sum of back pay (benefits owed from prior years), the entire amount is included in your combined income for the year you receive it. This can push you over the threshold and make part of your SSDI taxable. A tax professional can help you understand the impact and explore options like spreading the income over multiple years if allowed.

What states do not tax SSDI?

Thirteen states do not tax SSDI: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, Oklahoma, and Pennsylvania. Other states either tax SSDI using the federal formula or have their own rules. Check your state's tax authority website or ask a tax professional.