Most people on SSDI do not have to file taxes on their benefits
Whether you owe federal income tax on your Social Security Disability Insurance (SSDI) payments depends on your total income for the year — not just what you received from Social Security. If SSDI is your only income and you earned nothing else, you almost certainly do not have to file. But if you have other income (wages, self-employment earnings, interest, pensions), the math changes, and you may owe tax on part of your benefits.
The IRS uses a formula called "combined income" to decide this. Combined income means your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. If your combined income stays below a certain threshold, none of your SSDI is taxable. If it goes above that threshold, up to 50 percent or 85 percent of your benefits may be subject to federal income tax.
The thresholds are the same whether you are single or married filing jointly, but married people filing separately face a much stricter rule: any combined income above zero may trigger taxation. State income tax rules vary — some states tax SSDI, others do not, and a few tax it only under certain conditions.
Key Takeaways
- If SSDI is your only income, you do not owe federal income tax on your benefits.
- If you have other income (wages, self-employment, interest, pensions), you may owe tax on part of your SSDI, depending on how much your combined income totals.
- Combined income includes your adjusted gross income, nontaxable interest, and half of your Social Security benefits — not just what you earned.
- The IRS thresholds are $25,000 for single filers and $32,000 for married couples filing jointly; married people filing separately face taxation on any combined income above zero.
- Some states tax SSDI and some do not, so you may owe state income tax even if you owe no federal tax.
How the IRS calculates whether your SSDI is taxable
The IRS does not look at your SSDI alone. It adds up three things: your adjusted gross income (wages, self-employment income, taxable pensions, taxable interest, and other reportable income), any nontaxable interest you earned (such as interest from municipal bonds), and half of your Social Security benefits for the year. That total is your combined income.
Once you know your combined income, you compare it to the IRS threshold for your filing status. For a single person, the threshold is $25,000. For a married couple filing jointly, it is $32,000. For a married person filing separately, it is $0 — meaning any combined income at all may trigger taxation.
If your combined income is below the threshold, none of your SSDI is taxable, and you owe no federal income tax on your benefits. If your combined income exceeds the threshold, the IRS taxes the lesser of two amounts: either 50 percent of the excess over the threshold, or 50 percent of your total benefits — whichever is smaller. If your combined income is very high, up to 85 percent of your benefits may be taxable instead.
When you have wages or self-employment income alongside SSDI
Wages and self-employment income count fully toward your combined income, which is why many people on SSDI who work part-time end up owing tax on their benefits. If you earn $15,000 in wages and receive $12,000 in SSDI, your combined income is $15,000 plus half of $12,000 (which is $6,000), totaling $21,000. That is below the $25,000 threshold for a single person, so you owe no tax on your SSDI.
But if you earn $20,000 in wages and receive $12,000 in SSDI, your combined income is $20,000 plus $6,000, totaling $26,000. That exceeds the $25,000 threshold by $1,000. The IRS would tax the lesser of $500 (half of the $1,000 excess) or $6,000 (half of your total benefits). In this case, $500 of your SSDI becomes taxable income.
Self-employment income works the same way: it counts toward combined income at its full amount. If you are self-employed and on SSDI, you will need to report your net self-employment income on Schedule C and include it in your combined income calculation.
Pensions, interest, and other income sources
Taxable pensions, taxable annuities, and taxable interest all count toward combined income. Nontaxable interest — such as interest from municipal bonds — also counts, even though it is not taxable itself. This rule catches people who have a small pension and modest SSDI but little other income; the pension can push their combined income over the threshold and make part of their SSDI taxable.
Dividends, capital gains, and rental income all count as well. The only common income sources that do not count are Supplemental Security Income (SSI), workers' compensation, and certain veterans' benefits. If you receive SSI alongside SSDI, your SSI does not factor into the combined income calculation.
If you are unsure whether a particular income source counts, the safest approach is to include it in your combined income calculation. You can always adjust later if you find out it should not have been included.
State income tax on SSDI
Federal rules do not explore to state income tax. Some states do not tax SSDI at all, regardless of your income level. Other states follow the federal formula and tax SSDI the same way the IRS does. A few states tax SSDI only if your income exceeds a certain amount, or only for people above a certain age.
If you live in a state with income tax, you will need to check your state's specific rules. Your state tax agency's website usually has a section on Social Security taxation, or you can call their helpline. Some states publish worksheets similar to the federal one; others have different thresholds or different formulas entirely.
Even if you owe no federal income tax on your SSDI, you may still owe state income tax. Conversely, you might owe federal tax but no state tax. The two systems are separate, so you cannot assume one result applies to the other.
How to report SSDI on your tax return
The Social Security Administration sends you a Form SSA-1099-SM each January showing how much SSDI you received the previous year. You use this form to fill out your federal tax return. If you file Form 1040 (the main federal income tax form), you will enter your Social Security benefits on lines 5a and 5b, which ask for the total amount received and the taxable amount.
To figure out the taxable amount, you work through the combined income calculation described above. The IRS provides a worksheet in the instructions to Form 1040 that walks you through the steps. If your combined income is below the threshold, you enter zero on line 5b (taxable benefits). If it exceeds the threshold, you calculate how much is taxable using the worksheet and enter that amount.
If you use tax software or work with a tax preparer, you can give them your SSA-1099-SM and your other income documents, and they will handle the calculation. Many tax software programs have a built-in calculator for Social Security taxation.
What happens if you do not file when you should
If your combined income exceeds the threshold and you owe federal income tax but do not file, the IRS may send you a notice. The penalty for not filing is usually 5 percent of the unpaid tax for each month the return is late, up to 25 percent total. If you owe tax and do not pay it, interest accrues on top of the penalty.
If you straightforward did not realize you had to file because you thought SSDI was not taxable, you can still file a late return. The IRS often waives penalties for people who file late but have a reasonable cause — and not knowing that SSDI could be taxable is generally considered reasonable cause. Filing late is better than not filing at all.
If you are unsure whether you need to file, the safest choice is to file anyway. Filing when you do not owe tax does not hurt you, and it protects you if the IRS later questions your income.
Frequently Asked Questions
Do I have to file taxes if SSDI is my only income?
No. If SSDI is your only income for the year, you do not have to file a federal income tax return, because your combined income will be below the threshold. However, if you have any other income — even a small amount of wages or interest — you may need to file.
What if I earned money from work but my total income is still below the threshold?
You do not owe federal income tax on your SSDI, but you may still have to file a return if your earned income alone exceeds the filing threshold for your age and status. Check the IRS filing requirements for your situation, or use the IRS interactive tool on their website.
Can I get a refund if I overpaid taxes on my SSDI?
Yes. If you had taxes withheld from your benefits or paid estimated tax and it turns out you overpaid, you can claim a refund when you file your return. This is one reason to file even if you think you do not owe tax.
Does my spouse's income count toward the threshold if we file jointly?
Yes. When you file jointly, you combine both spouses' income to calculate combined income. If your spouse has wages or other income, it counts toward the $32,000 threshold for married couples filing jointly.
What if I received SSDI for only part of the year?
You count only the SSDI you actually received. The SSA-1099-SM you receive in January will show the exact amount. Use that figure in your combined income calculation, not an estimate of what a full year would have been.