Whether your SSDI is taxable depends on your total income, not just your benefit amount

Social Security Disability Insurance (SSDI) becomes taxable only if your combined income exceeds a threshold set by the IRS. Combined income is not the same as your benefit check. It includes your SSDI payment plus half of that payment, plus any other income you receive—wages, self-employment earnings, interest, dividends, rental income, and taxable pensions.

The threshold is $25,000 for a single filer and $32,000 for married filing jointly. If your combined income stays below these amounts, you owe no federal tax on your SSDI. If it exceeds the threshold, up to 50 percent of your benefits may be taxable, and in some cases up to 85 percent.

The calculation is specific and mechanical. The IRS publishes a worksheet each year. Many people with SSDI pay no tax because their only income is the benefit itself, which falls below the threshold. Others—those who work part-time, receive a pension, or have investment income—may owe tax on a portion of their benefits.

Key Takeaways

  • SSDI becomes taxable only if your combined income (half your SSDI plus all other income) exceeds $25,000 for single filers or $32,000 for married filing jointly.
  • If your only income is SSDI, you almost certainly owe no federal tax, even if your benefit is substantial.
  • Wages from work, self-employment income, pensions, and investment income all count toward the threshold and may push you into taxable territory.
  • You calculate tax liability using IRS Worksheet 1 or 2 (depending on whether you have nontaxable income like Supplemental Security Income), found in the instructions to Form 1040.
  • Some states also tax SSDI, though most do not; check your state's tax rules or ask a tax preparer familiar with disability income.

How the IRS calculates combined income

The IRS formula is: half your SSDI benefit plus all other income. This is called combined income, and it is the number that determines whether any of your SSDI is taxable.

Suppose you receive $1,500 per month in SSDI ($18,000 per year) and earn $10,000 from part-time work. Your combined income is ($18,000 ÷ 2) + $10,000 = $19,000. You are below the $25,000 threshold, so none of your SSDI is taxable. Your tax liability depends only on your $10,000 in wages.

Now suppose you receive $1,500 per month in SSDI and have $20,000 in pension income. Your combined income is ($18,000 ÷ 2) + $20,000 = $29,000. You are $4,000 over the $25,000 threshold. The IRS then applies a second calculation to determine how much of your SSDI is taxable—up to 50 percent of the amount over the threshold, or up to 50 percent of your total benefit, whichever is less. In this case, that is $2,000 (50 percent of the $4,000 overage). So $2,000 of your $18,000 SSDI is taxable income.

The second threshold—85 percent taxation—applies only if your combined income exceeds $34,000 (single) or $44,000 (married filing jointly). At that level, up to 85 percent of your benefits may be taxable. This affects relatively few SSDI recipients, mainly those with substantial other income.

What counts as income for this calculation

Earned income includes wages from employment and net self-employment income. If you work and report earnings to Social Security, those same earnings count toward your combined income for tax purposes.

Unearned income includes interest, dividends, capital gains, rental income, and taxable pensions. It also includes distributions from retirement accounts (401(k)s, IRAs, and similar plans), though the rules vary depending on the type of account and your age. Distributions from a Roth IRA are not counted as income for this purpose, but distributions from a traditional IRA are.

Income that does not count includes Supplemental Security Income (SSI), workers' compensation, certain veterans' benefits, and some other government payments. These are excluded by law. However, if you receive both SSDI and SSI, you use a different IRS worksheet (Worksheet 2 instead of Worksheet 1) because SSI is treated differently.

Tax-exempt interest (from municipal bonds, for example) does count toward combined income for purposes of determining whether your SSDI is taxable, even though the interest itself is not taxable. This is a common surprise for retirees and people with investment income.

When you must file a tax return

You must file a federal 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 a single person under 65 and $18,450 for a single person 65 or older. For married filing jointly, it is $29,200 (both under 65) and $30,750 (one spouse 65 or older).

Even if you are below the standard deduction, you should file if you had income tax withheld from your paychecks or if you are owed a refundable tax credit, such as the Earned Income Tax Credit (EITC). SSDI itself does not have tax withheld, but wages do.

If you are unsure whether you must file, the IRS provides an interactive tool on its website. You can also contact a local tax information program—many offer free help to people with low to moderate income. The IRS Volunteer Income Tax information (VITA) program and Tax Counseling for the Elderly (TCE) both serve people with disabilities and seniors.

How to report SSDI on your tax return

SSDI appears on Form SSA-1099, which Social Security mails to you by January 31 each year. The form shows your total SSDI benefit for the prior year in Box 5. You do not report this amount directly on your Form 1040. Instead, you use IRS Worksheet 1 (or Worksheet 2 if you also receive SSI) to calculate how much, if any, of your SSDI is taxable.

The taxable portion of your SSDI goes on line 5b of Form 1040 (or line 5c if you are filing Form 1040-SR, the version for people 65 and older). The worksheet walks you through the calculation step by step. If you use tax preparation software, the software usually includes the worksheet and calculates it for you once you enter your SSDI amount and other income.

Keep your Form SSA-1099 with your tax records. If you file electronically, you do not need to attach it, but you should keep it for your records in case the IRS has questions.

State taxes on SSDI

Most states do not tax SSDI. However, a handful of states—including Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont—tax SSDI as income, though many offer partial or full exemptions for people with disabilities or low income.

The rules vary by state and change periodically. Some states exempt SSDI entirely. Others tax it but allow a deduction or credit. A few tax it the same way the federal government does, using the combined income threshold. If you live in one of these states, your state tax return instructions or your state's revenue department website will explain the rules.

If you work with a tax preparer, tell them you receive SSDI and ask whether your state taxes it. If you prepare your own return, check your state's instructions or call the state revenue office. The cost of a few minutes on the phone is worth avoiding an error.

What to do if you owe tax on your SSDI

If your combined income pushes you over the threshold and you owe tax on a portion of your SSDI, you have two options: pay the tax when you file your return, or request that Social Security withhold tax from your monthly benefit check.

To request withholding, you file Form W-4V (Voluntary Withholding Request) with Social Security. You can submit it online through your my Social Security account, by mail, or in person at a Social Security office. You specify the amount to withhold each month—$10, $20, $50, or $100. Social Security will then reduce your monthly benefit by that amount and send the withheld money to the IRS.

Withholding is optional. Many people prefer to pay their tax bill in one lump sum when they file their return, rather than reduce their monthly benefit. Others prefer to have tax withheld so they do not face a large bill in April. The choice depends on your cash flow and preference.

If you do not withhold and do not pay your tax by April 15, you may owe penalties and interest. The IRS treats SSDI the same as any other income for purposes of enforcing payment.

Frequently Asked Questions

If I only receive SSDI and no other income, do I have to file a tax return?

No. If SSDI is your only income and it is below the standard deduction for your age and filing status, you have no filing requirement and owe no tax. For 2024, a single person under 65 with only SSDI income does not file unless the benefit exceeds $14,600.

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

It may. Your combined income is half your SSDI plus your wages. If the total exceeds $25,000 (single) or $32,000 (married), some of your SSDI becomes taxable. However, you may also be subject to SSDI's earnings limit, which is separate from the tax rule. Check with Social Security about how work affects your benefit amount.

If I receive both SSDI and SSI, how does that change the tax calculation?

You use IRS Worksheet 2 instead of Worksheet 1. SSI is not counted as income for purposes of determining whether your SSDI is taxable. However, the calculation is more complex, and many people in this situation benefit from working with a tax preparer or calling VITA for free help.

Can I reduce my taxable SSDI by making charitable donations?

Charitable donations reduce your overall tax liability, but they do not reduce the amount of SSDI that is subject to tax. The taxable portion of your SSDI is determined first by the combined income formula, and then you explore deductions and credits to your total taxable income. Donations help, but they do not prevent SSDI from being taxable in the first place.

What if Social Security sent me a Form SSA-1099 with the wrong amount?

Contact Social Security when ready. You can call 1-800-772-1213, visit a local office, or use your my Social Security account. Social Security will correct the form and send you a corrected Form SSA-1099. Do not file your tax return until you have the correct form, or file an amended return if you already filed.