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

Social Security Disability Insurance (SSDI) may or may not be taxed. The answer depends on your combined income—which includes wages, interest, dividends, and half of your SSDI benefit itself. If your combined income stays below a certain threshold, you owe no federal tax on SSDI. If it exceeds that threshold, up to 50% or 85% of your benefit becomes taxable.

The thresholds are the same for everyone: $25,000 if you file as single, or $32,000 if you file as married filing jointly. These numbers have not changed since 1984, so they affect far more people now than they did when they were set.

State taxes are separate. Some states tax SSDI, some do not. A few states that have income tax exempt SSDI entirely, while others tax it the same way the federal government does.

Key Takeaways

  • Your SSDI is taxed only if your combined income (wages plus half your SSDI plus other income) exceeds $25,000 single or $32,000 married filing jointly.
  • Combined income is calculated by adding your adjusted gross income, nontaxable interest, and half your SSDI benefit—not your full benefit amount.
  • If you exceed the threshold, either 50% or 85% of your benefit becomes taxable, depending on how far over you go.
  • State tax treatment of SSDI varies; some states do not tax it at all, while others follow federal rules.
  • You report SSDI on your federal tax return using the amount shown on your Social Security statement, even if none of it is taxable.

How combined income is calculated

The Social Security Administration uses a specific formula to determine whether your SSDI is taxable. Start with your adjusted gross income (AGI)—the number from your tax return before you claim the standard or itemized deduction. Add any nontaxable interest you earned, such as interest from municipal bonds. Then add half of your SSDI benefit for the year.

That total is your combined income. It is the only number that matters for the tax test. Your full SSDI benefit does not count toward the threshold; only half of it does.

Example: You earned $20,000 in wages and received $12,000 in SSDI. Your combined income is $20,000 + $6,000 (half the SSDI) = $26,000. Since you file as single and the threshold is $25,000, you are $1,000 over. This means some of your SSDI becomes taxable.

The two-tier tax formula

Once you know you are over the threshold, the amount of SSDI that is taxable depends on how far over you are. The formula has two tiers, and the calculation can feel backwards at first.

For the first tier: Take the amount your combined income exceeds the threshold. Multiply it by 50%. That is the amount of SSDI that becomes taxable—but only up to 50% of your total SSDI benefit for the year.

If your combined income is more than $9,000 over the threshold (or $12,000 if married), you move to the second tier. The excess above $9,000 (or $12,000) is multiplied by 85%, and that amount is added to what you already calculated in tier one. The total taxable SSDI cannot exceed 85% of your benefit.

Example continued: Your combined income is $26,000 and the threshold is $25,000, so you are $1,000 over. Fifty percent of $1,000 is $500. Since $500 is less than 50% of your $12,000 benefit ($6,000), your taxable SSDI is $500. You would report $500 as taxable income on your return.

What counts as income for this calculation

Adjusted gross income includes wages, self-employment income, taxable interest, dividends, capital gains, and taxable pensions. It also includes income from rental property, royalties, and annuities. If you have a spouse and file jointly, both spouses' income counts.

Some income does not count: Supplemental Security Income (SSI) is not included. Workers' compensation is not included. Veterans benefits are not included. Gifts and inheritances do not count. Neither does the return of your own principal from investments.

Nontaxable interest—such as interest from municipal bonds or savings bonds used for education—must be added back in for this calculation, even though it is not taxable income on your return.

State tax treatment of SSDI

Fifteen states do not have income tax at all, so SSDI is never taxed there. These states are Alaska, Florida, Illinois, Mississippi, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. (New Hampshire and Tennessee tax only interest and dividends, not wages or SSDI.)

Among states that do have income tax, most follow the federal rule: SSDI is taxed only if combined income exceeds the federal threshold. A few states—including Colorado, Connecticut, Kansas, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and West Virginia—exempt SSDI from state tax entirely, even if it is taxable federally.

The remaining states with income tax tax SSDI under their own rules, which may differ from federal thresholds or percentages. If you live in a state with income tax and are unsure of its treatment of SSDI, contact your state tax authority or check your state's tax guide.

How to report SSDI on your tax return

You report SSDI on Form 1040 (the main federal tax return form) using the amount shown on your Social Security statement, which you receive each January. The statement shows the total SSDI you received in the prior year. You enter this amount on line 5b of Form 1040, even if none of it is taxable.

If some of your SSDI is taxable, you then calculate the taxable portion using the two-tier formula described above. The taxable amount goes on line 5b as well, but you may also need to fill out a worksheet in the Form 1040 instructions to show your work.

If you use tax software, the program will walk you through the combined income calculation and compute the taxable portion automatically. If you file by hand or with a tax preparer, bring your Social Security statement and a list of all other income sources.

What happens if you do not report SSDI on your return

The Social Security Administration reports all SSDI payments to the IRS. If you receive SSDI and file a tax return, the IRS will see the benefit amount and may flag your return if the reported amount does not match. This can delay your refund or trigger an audit.

If you do not file a return but are required to (because your income exceeds the filing threshold), the IRS may contact you. The filing threshold is different from the SSDI tax threshold—you must file if your gross income is above a certain amount, which depends on your age and filing status.

If you are unsure whether you must file, use the IRS interactive tool on irs.gov or contact a tax preparer. Many communities offer free tax preparation for people with low to moderate income through the Volunteer Income Tax information (VITA) program.

Frequently Asked Questions

Can I reduce my taxable SSDI by earning less?

Yes. Since combined income determines whether SSDI is taxed, reducing other income—such as by working less or deferring investment income—can lower your combined income below the threshold. However, if you are working and receiving SSDI, the Substantial Gainful Activity (SGA) limit may affect your benefits independently of taxes, so consult with Social Security before making work decisions.

Is SSDI taxed if I am on Medicare?

Medicare status does not affect whether SSDI is taxed. The tax calculation is based on combined income alone. However, if some of your SSDI is taxable, you may owe income tax even if you are retired or on Medicare.

What if I did not report SSDI on my return in a previous year?

Contact a tax preparer or the IRS to file an amended return (Form 1040-X) for that year. If you owe tax, you may also owe interest and penalties, but the IRS sometimes waives penalties if you have a reasonable cause. The sooner you file the amended return, the better.

Does my spouse's SSDI affect whether mine is taxed?

If you file jointly, both spouses' combined income is added together for the tax test. So yes, your spouse's SSDI, wages, and other income all count toward the household threshold. If you file separately, each spouse is tested individually using the single threshold of $25,000.

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

Your Social Security statement shows the total SSDI you received for the calendar year, even if you started receiving it partway through. Use that total in the combined income calculation. If you started SSDI late in the year, your combined income may be lower than it would be in a full year, which could keep you below the tax threshold.