Whether your SSDI is taxed depends on your total income, not just the benefit itself

Social Security Disability Insurance (SSDI) is not automatically taxed. You pay federal income tax on SSDI only if your "combined income" exceeds a threshold set by the IRS. Combined income is not the same as your benefit amount — it includes your SSDI, plus half your SSDI, plus all other income you receive (wages, interest, pensions, rental income, and so on). For most people receiving only SSDI and no other income, no tax is owed.

The threshold is $25,000 for single filers and $32,000 for married couples filing jointly. If you cross that line, you may owe tax on up to 85 percent of your benefits. The exact amount taxed depends on how far over the threshold you go and what kinds of income pushed you over.

State income tax is separate. Some states do not tax SSDI at all; others tax it the same way the federal government does. A few tax it only if your total income is very high. You need to check your own state's rules.

Key Takeaways

  • SSDI becomes taxable only if your combined income (SSDI plus half your SSDI plus all other income) exceeds $25,000 for single filers or $32,000 for married filing jointly.
  • If you are below the threshold, you owe no federal tax on your SSDI, even if you have other income.
  • The IRS taxes up to 85 percent of your benefits if you are over the threshold, depending on how much over you are.
  • State tax treatment of SSDI varies widely — some states do not tax it, others do, and a few have their own thresholds.

How the IRS calculates combined income

The IRS formula is specific. Start with your adjusted gross income (AGI) — wages, self-employment income, interest, dividends, capital gains, and taxable pensions. Then add tax-exempt interest (usually from municipal bonds). Then add half of your SSDI benefit for the year. That total is your combined income.

The reason the IRS counts half your SSDI is historical: Congress wanted to tax benefits only for people with substantial other income, and this formula achieves that without taxing the poorest recipients. It means you can have some wages or pension income and still stay below the threshold.

Example: You receive $18,000 in SSDI and $8,000 in part-time wages. Your combined income is $8,000 + (half of $18,000) + $0 other income = $17,000. You are below $25,000, so no federal tax is owed on your SSDI.

Another example: You receive $18,000 in SSDI and $15,000 in pension income. Your combined income is $15,000 + $9,000 + $0 = $24,000. Still below the threshold. But if your pension were $16,000, your combined income would be $25,000 exactly, and you would owe tax on some of your benefits.

What happens when you cross the threshold

Once your combined income exceeds $25,000 (or $32,000 if married filing jointly), the IRS uses a two-tier system to determine how much of your SSDI is taxable.

The first tier covers the amount between $25,000 and $34,000 for single filers (or $32,000 to $44,000 for married filing jointly). In this range, you pay tax on the lesser of two amounts: either 50 percent of the amount you are over $25,000, or 50 percent of your SSDI benefit itself. Whichever is smaller is what gets added to your taxable income.

The second tier applies if your combined income exceeds $34,000 (or $44,000 if married filing jointly). Here, you pay tax on the lesser of either 85 percent of the amount over $34,000, plus any tax from the first tier, or 85 percent of your total SSDI benefit.

This means the maximum percentage of your SSDI that can be taxed is 85 percent, even if your combined income is very high. The system is designed so that people with modest other income pay tax on less of their benefit, while people with substantial income pay tax on more.

Working while on SSDI and tax consequences

If you work and receive SSDI, your wages count toward combined income, which can push you into the taxable range. However, SSDI itself has separate work rules that may reduce or stop your benefit before tax becomes an issue.

The Substantial Gainful Activity (SGA) threshold is the earnings limit that triggers a benefit reduction. In 2024, SGA is $1,550 per month for non-blind beneficiaries and $2,590 for blind beneficiaries (these amounts change yearly). If you earn more than this, your SSDI benefit is reduced or suspended, depending on how much you earn and which work incentive you are using.

If you are using a work incentive like the Plan to Achieve Self-Support (PASS) or the Impairment Related Work Expenses (IRWE) deduction, some of your earnings are excluded from the SGA calculation, which can keep your benefit intact. However, those same earnings still count toward combined income for tax purposes. You could keep your SSDI benefit but still owe tax on it because your wages pushed your combined income over the threshold.

The opposite can also happen: your earnings might be low enough that you stay below the SGA threshold and keep your full benefit, but your combined income (including half your SSDI) still exceeds $25,000, so you owe tax.

State income tax and SSDI

Thirteen states do not tax SSDI at all: Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, Oklahoma, and Pennsylvania. If you live in one of these states, you owe no state income tax on your SSDI, regardless of your combined income.

Most other states follow the federal rule: SSDI is taxable only if your combined income exceeds the federal threshold. A few states have their own thresholds or rules. Colorado, Connecticut, Kansas, and Minnesota, for example, have higher income thresholds or more generous exclusions for SSDI than the federal government does.

You should check your state's Department of Revenue or tax authority website to confirm how your state treats SSDI. If you live in a state that taxes SSDI and you owe federal tax on your benefits, you will likely owe state tax as well, though the amount may differ.

How to report SSDI on your tax return

SSDI is reported on Form 1040, the main federal income tax return. The Social Security Administration sends you a Form SSA-1099-SM (or Form SSA-1099-MINT for Medicare beneficiaries) in January, showing the total SSDI you received in the prior year. You use this amount to complete your return.

If you owe tax on your SSDI, you report it on lines 5a and 5b of Form 1040. Line 5a is the total SSDI you received; line 5b is the taxable portion (the amount the IRS calculated using the two-tier formula). Only the amount on line 5b is added to your taxable income.

If you do not owe tax on your SSDI, you still report the total on line 5a, but line 5b will be zero. This is important because the IRS uses the Form SSA-1099-SM to verify that you reported your benefits, even if none of it is taxable.

If you have a complex situation — for example, you have wages, a pension, and SSDI — you may find it easier to work with a tax professional or use tax software that walks you through the combined income calculation. The IRS Pub. 915 (Social Security and Equivalent Railroad Retirement Benefits) contains worksheets and examples if you want to calculate it yourself.

What to do if you cannot pay tax owed on SSDI

If you owe tax on your SSDI but cannot pay the full amount by the important date, you have options. You can request a payment plan (called an installment agreement) from the IRS, which lets you pay in monthly installments. You can also request an extension of time to file, though this does not extend the time to pay without penalty and interest.

If you are facing financial hardship, you can request Currently Not Collectible (CNC) status, which temporarily pauses collection while you are unable to pay. Interest and penalties continue to accrue, but the IRS will not pursue collection action. Once your situation improves, collection resumes.

Contact the IRS directly at 1-800-829-1040 to discuss your options, or work with a tax professional or legal aid organization if you need help. Some disability advocacy organizations also offer tax information to people on SSDI.

Frequently Asked Questions

If I am below the combined income threshold, do I still have to file a tax return?

Not necessarily. If SSDI is your only income and you are below the threshold, you have no federal tax filing requirement. However, if you have other income (wages, interest, pensions), you may be required to file even if your combined income is below $25,000. Check the IRS filing requirements based on your age and type of income.

Does Medicare Part B premium come out of my SSDI check affect my taxes?

No. Medicare premiums are deducted from your SSDI benefit before you receive it, but the full SSDI amount (before the deduction) is what counts toward combined income for tax purposes. The premium itself does not reduce your taxable SSDI.

Can I have taxes withheld from my SSDI to avoid owing at tax time?

Yes. You can request voluntary federal income tax withholding on your SSDI by completing Form W-4V and submitting it to the Social Security Administration. You choose the withholding amount, and it is deducted from your monthly benefit. This can help you avoid a large tax bill in April.

What if I receive both SSDI and SSI?

SSI (Supplemental Security Income) is never taxable, but SSDI is taxed under the rules described here. If you receive both, only the SSDI portion counts toward combined income. SSI is excluded entirely from the calculation.

Does my spouse's income count toward my combined income threshold?

Only if you file a joint return. If you are married and file jointly, your spouse's income is added to yours when calculating combined income. If you file separately, only your own income counts, but filing separately may result in more of your SSDI being taxed due to the way the IRS calculates the taxable portion for married couples filing separately.