Whether you file taxes on SSDI depends on your total income, not just your benefits

You do not automatically have to file taxes just because you receive SSDI. The Social Security Administration does not withhold federal income tax from SSDI payments. Whether you owe taxes depends on whether your combined income — SSDI plus any other income you have — crosses the threshold the IRS sets for your filing status.

The threshold is low. For 2024, a single person with only SSDI income does not file unless they earned more than $14,600 from work or other sources. But the moment you add SSDI to other income, the math changes. Up to 85 percent of your SSDI benefits can be counted as taxable income if you have earnings, pensions, interest, or other money coming in.

The IRS calls this the "combined income" test. It is the reason many SSDI recipients who thought they were safe end up owing taxes — they did not account for how SSDI interacts with a part-time job, a spouse's income on a joint return, or investment earnings.

Key Takeaways

  • You must file taxes if your combined income (SSDI plus earnings, pensions, interest, and other sources) exceeds the IRS threshold for your filing status, which varies by year and marital status.
  • Up to 85 percent of your SSDI benefits can be taxable if you have other income, even if that other income is small.
  • The Social Security Administration sends you a Form SSA-1099 each January showing your SSDI payments for the prior year; you use this to calculate whether you owe taxes.
  • If you work and earn wages, you may owe taxes on SSDI even if you would not owe taxes on the wages alone.
  • Filing taxes when you do not owe can sometimes benefit you — it may lower your Medicare premiums or help you claim the Earned Income Tax Credit.

How the IRS counts SSDI as income

The IRS does not treat SSDI the way it treats other income. Instead of counting the full amount, it uses a formula called the combined income calculation. Your combined income is one-half of your SSDI benefits plus all your other income (wages, self-employment earnings, interest, dividends, pensions, and taxable distributions from retirement accounts).

If your combined income is below $25,000 (single) or $32,000 (married filing jointly), none of your SSDI is taxable. If it is between $25,000 and $34,000 (single) or $32,000 and $44,000 (married), up to 50 percent of your benefits can be taxed. If it exceeds those amounts, up to 85 percent can be taxed. These thresholds have not changed since 1993.

Example: You receive $1,200 per month in SSDI ($14,400 per year) and earn $15,000 from part-time work. Your combined income is ($14,400 ÷ 2) + $15,000 = $22,200. You are below the $25,000 threshold, so none of your SSDI is taxable. You would file only on the $15,000 in wages.

Example: You receive $1,200 per month in SSDI ($14,400 per year) and have $12,000 in pension income. Your combined income is ($14,400 ÷ 2) + $12,000 = $19,200. Again, you are below $25,000, so no SSDI is taxable.

Example: You receive $1,200 per month in SSDI ($14,400 per year) and earn $20,000 from work. Your combined income is ($14,400 ÷ 2) + $20,000 = $27,200. You are between $25,000 and $34,000, so up to 50 percent of your SSDI ($7,200) can be taxable. You would report $7,200 of SSDI plus $20,000 in wages as income.

What counts as income for this calculation

The IRS includes almost everything. Wages from work count. Self-employment income counts. Interest from a savings account counts. Dividends and capital gains count. Distributions from IRAs and 401(k)s count. Pensions count. Rental income counts. Even tax-exempt interest from municipal bonds counts for the combined income test (though it does not count toward your regular taxable income).

Some things do not count. Supplemental Security Income (SSI) does not count — it is a separate program and is never taxable. Gifts do not count. Loans do not count. Returns of your own principal from investments do not count. Railroad Retirement benefits have their own rules and are not part of this calculation.

If you are married and file jointly, your spouse's income counts too, even if your spouse does not receive SSDI. This is a common surprise for couples where one person receives SSDI and the other has a job or pension. The working spouse's income can push the household's combined income high enough to make the SSDI recipient's benefits taxable.

The Form SSA-1099 and how to use it

Each January, the Social Security Administration mails you a Form SSA-1099 showing how much SSDI you received in the prior year. Box 5 shows your net SSDI benefits (the amount after any Medicare premiums were deducted). You use this number to calculate your combined income.

The form arrives by January 31. If you do not receive one by early February, you can request it by calling Social Security at 1-800-772-1213 or by logging into your my Social Security account online. You will need the SSA-1099 to file your taxes accurately, even if you do not think you owe taxes — your tax software or preparer will ask for it.

Do not use the gross amount shown in Box 3. Use the net amount in Box 5, which reflects any Medicare Part B or Part D premiums that Social Security deducted from your payment. This is the number that actually went into your bank account.

When you must file even if you do not owe taxes

There are situations where filing taxes is worth doing even though you do not owe anything. If you work and have taxes withheld from your paycheck, you may be may have access to to a refund. If you have a child or dependent, you may be able to claim the Child Tax Credit or the Earned Income Tax Credit (EITC), which can result in a refund of thousands of dollars.

Filing can also affect your Medicare premiums. Medicare Part B and Part D premiums are based on your modified adjusted gross income from two years prior. If your income drops — because you stopped working, for example — filing a tax return for that lower-income year can lower your premiums in the following years. Social Security uses your tax return to verify your income for premium calculations.

If you are unsure whether filing would help you, a tax preparer or the IRS Volunteer Income Tax information (VITA) program can review your situation for free. VITA sites are located in libraries, community centers, and nonprofits across the country and serve people with income below a certain threshold (which changes yearly).

State income taxes on SSDI

Federal tax rules do not explore to state income tax. Some states do not tax SSDI at all. Others tax it the same way the federal government does — using the combined income formula. A few states have their own rules.

You will need to check your state's rules or ask a tax preparer familiar with your state. The IRS does not have a single list, but your state's department of revenue website usually has a page on disability benefits and taxation. If you live in a state with income tax and receive SSDI, you should verify whether you owe state taxes separately from federal taxes.

What happens if you do not file when you should

If you owe taxes and do not file, the IRS can assess penalties and interest. The failure-to-file penalty is 5 percent of the unpaid tax per month, up to 25 percent. Interest accrues daily at a rate set quarterly (currently around 8 percent per year). These charges compound, so a small tax bill can grow quickly.

If you realize you missed a year, you can still file. The IRS generally allows you to file back taxes going back several years. If you are owed a refund, there is no penalty for filing late — you straightforward lose the refund if you wait more than three years. If you owe, filing sooner rather than later limits the interest and penalties.

If you are unsure whether you owed taxes in a prior year, a tax preparer or VITA volunteer can review your records and help you file amended returns if needed.

Frequently Asked Questions

Can I work part-time and still not owe taxes on SSDI?

Yes, if your combined income stays below the threshold. For 2024, a single person with SSDI and part-time wages does not owe federal taxes if combined income is below $25,000. But combined income includes half your SSDI benefits, so the threshold is lower than it appears. Use the formula: (SSDI ÷ 2) + wages. If that total is under $25,000, you do not owe federal taxes.

Does my spouse's income count toward my SSDI tax threshold?

Yes, if you file taxes jointly. Your spouse's wages, pensions, interest, and other income all count toward the combined income calculation. This can push your household over the threshold and make your SSDI taxable even if you have no income yourself. If your spouse has significant income, filing separately may lower your tax burden, though this requires case-by-case analysis.

What if I received SSDI for only part of the year?

The Form SSA-1099 will show only the benefits you actually received. Use that amount in the combined income calculation. If you started or stopped receiving SSDI mid-year, the form reflects that. Your tax filing is based on what you actually received, not what you would have received for a full year.

Does filing taxes affect my SSDI benefits?

Filing taxes does not reduce your SSDI benefits. SSDI is not means-tested — your benefits do not change based on income or assets. However, filing taxes can affect other programs. If you receive Supplemental Security Income (SSI), your income can affect your SSI payment. And your tax return affects your Medicare premiums two years later. But SSDI itself is unaffected by filing.

Where can I get help filing taxes on SSDI?

The IRS Volunteer Income Tax information (VITA) program offers free tax preparation for people with income below a certain threshold. Find a VITA site near you at irs.gov/vita. You can also work with a tax preparer or CPA. Bring your Form SSA-1099, any W-2s or 1099s from other income, and records of deductions or credits you think you may may have access to for.