Whether you pay income tax on disability benefits depends on your total income and filing status

Social Security Disability Insurance (SSDI) benefits are subject to federal income tax, but only if your combined income exceeds a threshold that depends on whether you file alone or jointly. Combined income includes your SSDI, other earnings, interest, dividends, and certain other sources. Supplemental Security Income (SSI) is never taxable, even if you receive it alongside SSDI.

The threshold is low: $25,000 for single filers and $32,000 for married couples filing jointly. If you are married filing separately, the threshold is $0 — meaning any SSDI is potentially taxable. Most people on SSDI alone do not owe tax because their income stays below these limits. But if you work part-time, have investment income, or receive a pension, you may cross the threshold.

The tax itself is not owed on the full benefit amount. Instead, the IRS uses a formula: up to 85 percent of your SSDI can be taxable, depending on how far your combined income exceeds the threshold. This means even if you are over the limit, you typically pay tax on only a portion of your benefits.

Key Takeaways

  • SSDI is taxable if your combined income (SSDI plus all other income) exceeds $25,000 (single) or $32,000 (married filing jointly), but SSI is never taxable.
  • Combined income includes wages, self-employment earnings, interest, dividends, pensions, and distributions from retirement accounts — not just SSDI.
  • You may owe tax on up to 85 percent of your SSDI, not the full amount, and the exact percentage depends on how much your combined income exceeds the threshold.
  • Social Security sends Form SSA-1099 in January showing your SSDI for the prior year; you use this to file your tax return or determine if you must file.
  • If you work and earn wages, your employer withholds income tax from your paycheck, but Social Security does not automatically withhold from SSDI unless you request it.

How the IRS calculates taxable SSDI

The calculation uses a two-tier system. In the first tier, if your combined income exceeds the threshold by more than $9,000 (single) or $12,000 (married), up to 50 percent of the excess is taxable. In the second tier, any amount above that is taxed at up to 85 percent. Most people fall into the first tier only.

Example: You are single and receive $1,500 per month in SSDI ($18,000 per year). You work part-time and earn $10,000. Your combined income is $28,000. Your threshold is $25,000, so you are $3,000 over. Since $3,000 is less than $9,000, you calculate 50 percent of the excess: $3,000 × 0.50 = $1,500. You owe income tax on $1,500 of your SSDI, not the full $18,000.

The formula is complex enough that the Social Security Administration provides a worksheet in Publication 915 (Tax Information for SSDI and Railroad Retirement Benefits). You can work through it yourself or give the numbers to a tax preparer. Many tax software programs now include this calculation.

What counts as combined income

Combined income is broader than you might expect. It includes W-2 wages, self-employment income, interest and dividends (even if you do not owe tax on them), capital gains, distributions from IRAs and 401(k)s, pensions, rental income, and certain other sources. It does not include SSI, Supplemental Nutrition information Program (SNAP) benefits, or housing information.

If you are married filing jointly, your spouse's income counts toward the threshold even if your spouse does not receive SSDI. This can push a couple over the limit even if the SSDI recipient's own income is low. If you are married filing separately, the threshold drops to $0, meaning any SSDI is potentially taxable — this is almost never the better choice.

Nontaxable interest — such as interest from municipal bonds — does not count toward combined income. However, tax-exempt interest is included in a separate calculation used by some people to determine if they must file a return at all. The rules are different, and this is where a tax preparer can save you time.

When you must file a tax return

You must file a federal income tax return if your gross income exceeds the standard deduction for your filing status and age. For 2024, the standard deduction is $14,600 for single filers under 65 and $18,450 for those 65 and older. If you are receiving SSDI and your only income is SSDI below these amounts, you do not have to file.

However, you may want to file anyway. If your employer withheld income tax from your wages, you will need to file to get a refund. If you had tax withheld from your SSDI (see below), filing is how you claim that money back. Some people also file to claim the Earned Income Tax Credit (EITC) if they work and have low income.

Social Security sends you Form SSA-1099 in January showing your SSDI for the prior year. Use this form and your other income documents to determine whether you must file. If you are unsure, the IRS Free File program and many nonprofits offer free tax preparation help.

Tax withholding from SSDI

Unlike wages, Social Security does not automatically withhold income tax from SSDI. If you know you will owe tax, you can request voluntary withholding by completing Form W-4V (Voluntary Withholding Request) and sending it to your local Social Security office or mailing it to Social Security. You choose the withholding rate: 7, 10, 15, or 22 percent of your monthly benefit.

Withholding is optional but can help you avoid a large tax bill at the end of the year. If you work and already have tax withheld from your paycheck, you may not need additional withholding from SSDI. A tax preparer can estimate your total tax liability and recommend a withholding strategy.

If you request withholding, Social Security will reduce your monthly benefit by the amount you specify. You can change or stop withholding at any time by submitting a new Form W-4V. Withholding is not the same as paying tax — it is money set aside from your benefit to cover tax you will owe.

SSDI and state income tax

Most states do not tax SSDI, but a few do. Illinois, Kansas, Mississippi, Missouri, Montana, New Mexico, Rhode Island, Utah, and Vermont tax SSDI under certain conditions or for certain income levels. Some of these states tax SSDI only if your total income exceeds a threshold similar to the federal one. Others tax SSDI for all filers regardless of income.

If you live in one of these states, you may owe state income tax on your SSDI even if you do not owe federal tax. State tax rules vary widely, and some states offer exemptions or deductions for disability income. Contact your state tax authority or a tax preparer familiar with your state's rules.

If you move to a different state, your tax situation may change. Some people on SSDI move specifically to a state with no income tax to reduce their overall tax burden. This is legal, but make sure you understand the full tax picture before you move, including property tax, sales tax, and other state and local taxes.

What to do if you cannot pay the tax you owe

If you owe income tax on your SSDI and cannot pay in full by the April important date, you have options. You can file your return on time and pay what you can, then set up a payment plan with the IRS. The IRS offers short-term plans (up to 180 days) at no cost and long-term installment agreements for a small fee.

You can also request an extension to file (not to pay), which gives you six more months to submit your return. An extension does not reduce the tax you owe or the interest that accrues, but it gives you time to gather documents or arrange payment. File Form 4868 (process for Automatic Extension of Time to File U.S. Individual Income Tax Return) before the April important date.

If you are experiencing financial hardship, the IRS has programs like Currently Not Collectible status, which temporarily pauses collection while you recover. Contact the IRS at 1-800-829-1040 or work with a tax professional or nonprofit tax clinic to explore your options.

Frequently Asked Questions

If I receive both SSDI and SSI, do I pay tax on both?

No. SSI is never taxable. Only your SSDI portion is subject to the income tax rules. Combined income for the tax calculation includes both SSDI and SSI, but only SSDI can be taxed. This is one reason SSI recipients often have a lower tax burden than SSDI recipients with the same total benefit amount.

Does working part-time while on SSDI make my benefits taxable?

Working part-time increases your combined income, which can push you over the threshold and make your SSDI taxable. However, SSDI has work incentives that allow you to earn a certain amount without losing benefits. The Impairment Related Work Expenses (IRWE) deduction and Plan to Achieve Self-Support (PASS) can reduce your countable income for benefit purposes, though they do not affect the tax calculation.

Can I reduce my taxable SSDI by making charitable donations?

Charitable donations reduce your taxable income overall, but they do not change the amount of SSDI that is subject to tax. The SSDI tax calculation is based on combined income, not on deductions. However, if you itemize deductions on your tax return, charitable donations can lower your overall tax bill.

What if Social Security made an error and overpaid me — do I owe tax on the overpayment?

If you received an overpayment and Social Security is recovering it by reducing your future benefits, the overpaid amount is still included in your income for the year you received it. You may owe tax on it. If you repay the overpayment in the same year or the following year, you may be able to claim a deduction. Consult a tax preparer about your specific situation.

Do I need to report my SSDI on my tax return if I do not owe tax?

You must report SSDI on your tax return if you file, even if none of it is taxable. Use the amount shown on Form SSA-1099. If you are not required to file a return, you do not need to report it. The IRS uses your return to verify that you reported SSDI correctly.