Most people on SSDI pay no federal income tax on their benefits, but some do—and the rule depends on your total income, not just SSDI alone

Whether you owe federal income tax on SSDI is determined by a formula called combined income, not by the amount of SSDI you receive. Combined income adds your adjusted gross income, nontaxable interest, and half your SSDI benefits together. If that total exceeds a threshold—$25,000 for a single filer, $32,000 for married filing jointly—then part of your SSDI becomes taxable. Below those thresholds, you owe nothing on SSDI, even if you have other income.

The reason SSDI can be taxable at all is that it is treated as a federal benefit under the tax code, similar to Social Security retirement benefits. The IRS does not tax SSDI itself; instead, it taxes the portion of your SSDI that pushes your total income above the threshold. This means a person with $30,000 in other income and $15,000 in SSDI may owe tax on some of the SSDI, while a person with $10,000 in other income and $20,000 in SSDI may owe nothing.

Key Takeaways

  • You are taxed on SSDI only if your combined income (other income plus half your SSDI) exceeds $25,000 (single) or $32,000 (married filing jointly).
  • If you are below the threshold, you owe no federal income tax on SSDI, regardless of how much SSDI you receive.
  • The IRS uses a two-step calculation to determine how much SSDI is taxable, and the maximum is 85 percent of your benefits.
  • You must file a federal tax return to report SSDI if you are required to file for any other reason, even if no tax is owed on the SSDI itself.
  • State income tax treatment of SSDI varies; some states tax it, some do not, and some have different thresholds than the federal government.

How the Combined Income Threshold Works

The IRS calculates combined income by adding three things: your adjusted gross income (wages, self-employment income, taxable interest, dividends, and other sources), your nontaxable interest (such as interest from municipal bonds), and half of your SSDI benefits. Once you have that total, you compare it to your filing status threshold.

For example, suppose you are single, receive $18,000 in SSDI for the year, and have $12,000 in wages. Your combined income is $12,000 + (half of $18,000) = $12,000 + $9,000 = $21,000. Because $21,000 is below the $25,000 threshold, you owe no federal income tax on any of your SSDI. If instead you had $16,000 in wages, your combined income would be $16,000 + $9,000 = $25,000, which equals the threshold—and you would still owe no tax, because the rule is "exceeds," not "meets or exceeds."

If your combined income exceeds the threshold, the IRS uses a two-step calculation to determine the taxable portion. The calculation is complex, but the result is that between 50 and 85 percent of your SSDI becomes taxable income, depending on how far above the threshold you are. No more than 85 percent of your benefits can ever be taxed, even if your combined income is very high.

When You Must File a Tax Return

You are required to file a federal tax return if your gross income meets the IRS filing threshold for your age and filing status. For 2024, a single person under 65 must file if gross income is $14,600 or more; a single person 65 or older must file if gross income is $18,350 or more. These thresholds change each year.

SSDI counts toward your gross income for the purpose of determining whether you must file, but only the taxable portion counts. If you have no other income and your combined income is below the threshold, you do not have to file a federal return. However, if you have wages, self-employment income, or other sources that push you over the filing threshold, you must file even if no tax is owed on the SSDI itself.

Many people on SSDI file a return anyway because they have a refundable tax credit, such as the Earned Income Tax Credit (EITC) or the Child Tax Credit, that results in a refund. Filing is free through IRS Free File if your income is below a certain level, or you can use a tax professional.

State Income Tax and SSDI

Federal tax treatment and state tax treatment are separate. Some states do not tax SSDI at all, regardless of income. Others tax SSDI using the same combined income formula as the federal government. A few states have their own thresholds or rules.

States that do not tax SSDI include Alaska, Florida, Illinois, Louisiana, Mississippi, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming. If you live in one of these states, you owe no state income tax on SSDI. If you live elsewhere, check your state's tax authority website or speak with a tax professional, because the rules vary. Some states also have credits or deductions that reduce the tax owed on SSDI even if it is technically taxable.

How SSDI Interacts with Other Income Sources

The combined income formula treats all income sources equally when calculating whether you cross the threshold. Wages, self-employment income, rental income, interest, dividends, and distributions from retirement accounts all count. This means a person with modest SSDI but substantial other income may owe tax on the SSDI, while a person with high SSDI but no other income may not.

Work incentive programs, such as the Student Earned Income Exclusion or the Plan to Achieve Self-Support (PASS), can reduce the income that counts toward the combined income threshold. If you are working and receiving SSDI, speak with a work incentive planning and information (WIPA) project or an employment network to understand how your earnings affect your tax situation.

Distributions from traditional IRAs, 401(k)s, and other retirement accounts are included in adjusted gross income and count toward the combined income threshold. Roth IRA distributions are treated differently depending on whether they are may have access to distributions, so the rules can be complex if you are drawing from retirement savings.

Reporting SSDI on Your Tax Return

SSDI is reported on Form 1040 (the main federal income tax return) and Form SSA-1099 (the Social Security Benefit Statement), which the Social Security Administration sends to you by January 31 each year. You must attach the SSA-1099 to your return when you file.

If part of your SSDI is taxable, you report the taxable portion on line 5b of Form 1040. The IRS worksheet in the Form 1040 instructions walks you through the combined income calculation and tells you how much to report. If you use tax software or a tax professional, they will handle this calculation for you.

If you file a return but no SSDI is taxable (because your combined income is below the threshold), you still report the full amount of SSDI you received on line 5a, and zero on line 5b. This is important because it documents your income and may be needed for other purposes, such as verifying income for housing information or Medicaid.

What Happens If You Underpay or Overpay Tax

If you owe tax on SSDI but do not pay it, the IRS can withhold the amount owed from your future SSDI payments. This is called federal income tax withholding on benefits. You can request withholding by filing Form W-4V with the Social Security Administration, which tells them to hold back a percentage of your monthly benefit.

If you overpay tax during the year—for example, because your income was lower than expected—you will receive a refund when you file your return. Many people on SSDI have little or no tax withheld and instead claim refundable credits on their return, which results in a refund even if no tax was owed.

If the IRS assesses tax owed on SSDI after you file, you can request a payment plan or an offer in compromise if you cannot pay in full. Contact the IRS directly or work with a tax professional or legal aid organization to discuss your options.

Frequently Asked Questions

Can I request that the Social Security Administration withhold taxes from my SSDI payments?

Yes. File Form W-4V with the Social Security Administration to request federal income tax withholding. You can choose to have 10, 15, 25, or 28 percent of your monthly benefit withheld. This is optional and does not change whether you owe tax; it only changes when you pay it.

Does SSDI count as income for Medicaid or other means-tested programs?

Yes, SSDI counts as income for most means-tested programs, but the rules vary by program and state. Some programs exclude a portion of SSDI or have higher income limits for SSDI recipients. Check with your state Medicaid agency or the program administrator to understand how your SSDI affects your may be able to access.

What if I receive both SSDI and Social Security retirement benefits?

Both are treated the same way for tax purposes. You add half of the combined total of both benefits to your other income to calculate combined income. The IRS then determines how much of the total is taxable using the two-step calculation.

Do I owe federal tax if I live outside the United States?

U.S. citizens and resident aliens owe federal income tax on SSDI regardless of where they live, using the same rules as those living in the United States. Nonresident aliens may have different rules. If you live abroad, consult a tax professional familiar with expatriate taxation.

What if I think the IRS made an error in calculating my tax on SSDI?

You can file Form 1040-X (Amended U.S. Individual Income Tax Return) to correct an error on a prior year return. You have generally three years from the original filing date to amend. If you disagree with an IRS information, you can request an appeals conference or work with a tax professional or legal aid organization.