Most people on SSDI do not owe federal income tax on their benefits, but some do—and the rule depends on your total income, not just what you receive from Social Security.

The combined income test determines whether your SSDI is taxable. Combined income means your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. If that total exceeds $25,000 (single filer) or $32,000 (married filing jointly), you may owe tax on up to 85 percent of your benefits. If your combined income is below those thresholds, your SSDI is not taxable.

The reason this matters: SSDI recipients often have other income—earnings from part-time work, a spouse's income, pensions, investment returns, or rental income. That other income is what pushes you over the threshold, not the SSDI itself. A person living on SSDI alone almost never pays tax on it. A person on SSDI who also works or has a pension may.

Key Takeaways

  • You owe tax on SSDI only if your combined income (adjusted gross income plus half your benefits) exceeds $25,000 single or $32,000 married filing jointly.
  • Combined income includes earnings from work, pensions, interest, dividends, and rental income—not just SSDI.
  • If you are taxed, only up to 85 percent of your benefits can be included in taxable income, never 100 percent.
  • The IRS sends Form SSA-1099 each January showing your SSDI for the prior year; use this to calculate whether you owe tax.
  • You can request voluntary withholding from your SSDI check to avoid a tax bill at filing time.

How the Combined Income Threshold Works

The $25,000 and $32,000 thresholds have not changed since 1984. They are not adjusted for inflation, which means more people cross them each year as wages and investment returns rise.

To calculate your combined income, start with your adjusted gross income (AGI)—the number on line 11 of Form 1040. Add any nontaxable interest (from municipal bonds, for example). Then add half of your total SSDI benefits for the year. If the result is over the threshold for your filing status, some of your benefits are taxable.

Example: You are single and receive $15,000 in SSDI. You also earn $18,000 from part-time work. Your AGI is $18,000. Half your SSDI is $7,500. Combined income is $18,000 + $7,500 = $25,500. You are $500 over the threshold, so some benefits are taxable. You would owe tax on the lesser of (a) 50 percent of the amount over the threshold ($250), or (b) 85 percent of your benefits ($12,750). In this case, $250 of your SSDI is taxable.

When Work Income Pushes You Into Taxable Territory

Work incentive programs like Impairment Related Work Expenses (IRWE) and the Plan to Achieve Self-Support (PASS) reduce your countable earnings for SSDI payment purposes, but they do not reduce your income for tax purposes. The IRS counts all your earnings when calculating combined income, even if Social Security does not count them toward your benefit amount.

This is a common surprise: you may keep your full SSDI check because of IRWE or PASS, but still owe federal income tax because the IRS sees your gross earnings. The two programs use different rules.

If you are using a work incentive, ask your Social Security representative for a written statement of your countable earnings and your gross earnings. Bring both numbers to a tax preparer so they understand the difference.

Spousal and Family Income on Joint Returns

If you file jointly with a spouse, the $32,000 threshold applies to your combined household income. Your spouse's income counts toward combined income even if your spouse does not receive SSDI. Your spouse's earnings, pensions, and investment income all go into the calculation.

If your spouse also receives SSDI or Social Security retirement benefits, you add half of both people's benefits to the combined income calculation. This can push a married couple over the threshold even if neither person works.

Some married couples file separately to keep combined income below the threshold. Filing separately has other tax consequences—you lose certain deductions and credits—so run the numbers both ways before deciding. A tax preparer can show you the difference in total tax owed under each filing status.

The Form SSA-1099 and Calculating Your Tax Liability

Each January, the Social Security Administration sends you Form SSA-1099, which shows the total SSDI you received in the prior calendar year. This is the number you use to calculate combined income and determine whether any benefits are taxable.

The form arrives by mail or, if you have a my Social Security account, you can view it online. If you do not receive it by early February, call Social Security at 1-800-772-1213 and request a copy. You need this form to file your tax return accurately.

Do not estimate your SSDI for the year. Use the exact figure from Form SSA-1099. If you received benefits for only part of the year (because you started SSDI mid-year or your benefits were suspended), the form reflects that.

Voluntary Withholding to Avoid a Tax Bill

If you know you will owe tax on your SSDI, you can ask Social Security to withhold federal income tax from your monthly check. This works like payroll withholding for a job: you choose an amount, Social Security deducts it each month, and you owe less (or nothing) when you file.

To set up withholding, complete Form W-4V (Voluntary Withholding Request) and submit it to your local Social Security office or mail it to the address on the form. You can choose to withhold 7, 10, 15, or 25 percent of your benefit, or request a flat dollar amount.

Withholding is optional. Many people choose it to avoid a large tax bill in April. Others prefer to keep the full benefit and pay tax when they file. The choice depends on your cash flow and whether you expect a refund or owe.

State Income Tax on SSDI

Most states do not tax SSDI benefits, but a few do. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont tax Social Security benefits under certain conditions. The rules vary by state and often depend on your age and total income.

If you live in one of these states, contact your state tax agency or a tax preparer familiar with your state's rules. Some states exempt SSDI entirely while taxing Social Security retirement benefits. Others use a combined income test similar to the federal test but with different thresholds.

Your Form SSA-1099 shows only federal tax information. You may need to request a separate statement from Social Security or your state for state tax purposes.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI?

No. If SSDI is your only income and it is below the standard deduction for your filing status, you do not have to file. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married filing jointly. However, if you have other income or you want to claim a refundable credit like the Earned Income Tax Credit, you should file even if you are not required to.

What if I owe back taxes from years I was on SSDI?

Contact the IRS at 1-800-829-1040 or visit irs.gov to set up a payment plan. The IRS can work with you on installments if you cannot pay in full. If you believe you were not required to file in prior years, you can still file amended returns (Form 1040-X) going back three years to claim refunds.

Does SSI (Supplemental Security Income) count as income for the SSDI tax test?

No. SSI is not taxable and does not count toward combined income. Only SSDI (Social Security Disability Insurance) and Social Security retirement benefits are included in the combined income calculation. If you receive both SSI and SSDI, only the SSDI portion affects your tax liability.

Can I deduct disability-related expenses on my tax return?

Possibly, but the rules are strict. Medical expenses (including equipment, medications, and care) can be deducted only if they exceed 7.5 percent of your adjusted gross income. Work-related expenses covered by IRWE are not deductible separately because they already reduce your SSDI payment. Consult a tax preparer to see whether your specific expenses meet the threshold.

What happens if I underreport my income and owe more tax than I thought?

The IRS will send you a notice with the corrected amount, interest, and possibly penalties. If the error was unintentional, you can request penalty relief. If you cannot pay, you can set up a payment plan. Do not ignore IRS notices—contact them when ready to resolve the issue.