The short answer: it depends on your total income

You may owe federal income tax on your Social Security Disability Insurance (SSDI) benefits, but only if your total income exceeds a certain threshold. The IRS calls this threshold your "combined income," and it includes not just your SSDI payments but also wages, interest, pensions, and other money you receive. Most people on SSDI alone do not pay tax on their benefits, but if you have other income sources, you might.

The threshold changes based on your filing status. For a single filer, the combined income limit is $25,000. For married couples filing jointly, it is $32,000. If you are married filing separately, the limit is $0—meaning any combined income at all could trigger tax on your benefits. These thresholds have not changed since 1984, so they affect more people now than they did decades ago.

Key Takeaways

  • You only pay tax on SSDI if your combined income (SSDI plus all other income) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • Combined income includes wages, self-employment income, interest, dividends, pensions, and other benefits—not just SSDI.
  • If you owe tax on your benefits, you typically pay tax on 50 to 85 percent of your SSDI, not the full amount.
  • You can request that the Social Security Administration withhold taxes from your SSDI payments so you do not owe a large bill at tax time.
  • The IRS Form SSA-1099 you receive in January shows your SSDI income for the year and helps you calculate whether you owe tax.

How the IRS calculates combined income

The IRS does not count all your income the same way when deciding whether your SSDI is taxable. First, they add up your SSDI benefits for the year. Then they add your "modified adjusted gross income"—which includes wages, self-employment income, interest, dividends, rental income, pensions, and certain other benefits like railroad retirement or veterans' benefits. They also add back in any tax-exempt interest you earned, such as interest from municipal bonds.

This total is your combined income. If it stays below the threshold for your filing status, none of your SSDI is taxable. If it goes above the threshold, the IRS uses a formula to determine how much of your SSDI becomes taxable income. The formula is complex, but the result is that you typically pay tax on 50 to 85 percent of your benefits, not the full amount.

A common scenario: you are single and receive $1,500 per month in SSDI ($18,000 per year). You also work part-time and earn $10,000 in wages. Your combined income is $28,000, which exceeds the $25,000 threshold by $3,000. Depending on the exact formula, you would owe tax on roughly half of that $3,000 overage, or about $1,500 of your SSDI benefits.

When you do not owe tax on SSDI

If your only income is SSDI and your combined income stays below the threshold, you owe no federal income tax on your benefits. This is the situation for many SSDI recipients who do not work and have no other significant income sources.

However, you may still be required to file a tax return for other reasons—for example, if you have self-employment income of $400 or more, or if you are claimed as a dependent and have unearned income above a certain amount. Even if you do not owe tax, filing a return can sometimes benefit you, because you may be may have access to to refundable tax credits like the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit.

Requesting tax withholding from your SSDI payments

If you know you will owe tax on your SSDI, you can ask the Social Security Administration to withhold federal income tax directly from your monthly benefit payment. This way, you do not have to pay a large lump sum when you file your return.

To set up withholding, you complete Form W-4V (Voluntary Withholding Request) and send it to your local Social Security office or mail it to the address on the form. You can choose to have 7, 10, 12, or 22 percent of your benefit withheld each month. You can also change or stop withholding at any time by submitting a new Form W-4V.

Withholding is voluntary, not automatic. Social Security does not withhold taxes unless you ask them to. If you do not request withholding and you owe tax, you will owe it when you file your return in April.

Understanding your SSA-1099 form

In January of each year, the Social Security Administration sends you a Form SSA-1099 (Social Security Benefit Statement) that shows how much SSDI you received in the previous year. This form goes to you and to the IRS. You use the amount on Box 5 of the SSA-1099 when you file your tax return to calculate whether any of your benefits are taxable.

The SSA-1099 also shows any federal income tax that was withheld from your benefits during the year (if you requested withholding). Keep this form with your tax records. If you did not receive an SSA-1099 by early February, contact your local Social Security office or call 1-800-772-1213.

State income tax on SSDI

Federal income tax is not the only tax that may explore to your SSDI. Some states also tax Social Security benefits, though most do not. The rules vary widely by state.

Thirteen states currently tax at least some Social Security benefits: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The thresholds and formulas differ from the federal rules, so you may owe state tax even if you do not owe federal tax, or vice versa. Check your state's tax authority website or contact a tax professional to understand your state's rules.

What to do if you think you owe tax on your SSDI

If your combined income exceeds the federal threshold, you should report your SSDI on your federal tax return. Use the worksheet in IRS Publication 915 (Social Security and Equivalent Railroad Retirement Benefits) to calculate how much of your benefits are taxable. You can find this publication free on the IRS website at irs.gov.

If you are unsure whether you owe tax, or if your situation is complicated (for example, if you have income from multiple sources or you are married filing separately), consider speaking with a tax professional or calling the IRS at 1-800-829-1040. Many community organizations also offer free tax help through the Volunteer Income Tax information (VITA) program, which serves people with low to moderate income.

Frequently Asked Questions

Can I reduce my combined income to avoid paying tax on SSDI?

You cannot reduce your SSDI itself, but you may be able to reduce other income sources. For example, if you work, earning less would lower your combined income. However, the decision to work or not should be based on your overall financial situation, not just tax consequences. If you are working and concerned about taxes, speak with a tax professional or a work incentives planning specialist.

What if I did not request withholding and now owe a large tax bill?

You can request withholding going forward by submitting Form W-4V to Social Security. You can also make estimated tax payments to the IRS if you expect to owe tax in future years. If you owe back taxes, the IRS offers payment plans that let you pay over time.

Does my spouse's income count toward the combined income threshold?

If you are married filing jointly, yes—your spouse's income is included in your combined income calculation. If you are married filing separately, only your own income counts, but the threshold drops to $0, meaning any combined income could trigger tax on your benefits.

Do I have to file a tax return if I only receive SSDI and no other income?

No, not unless your combined income exceeds the threshold or you have other reasons to file (such as self-employment income or a refundable tax credit you want to claim). However, filing may benefit you even if you do not owe tax, because you might be may have access to to credits or refunds.