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

The IRS taxes SSDI the same way it taxes retirement Social Security: only if your combined income exceeds certain thresholds. Combined income means your adjusted gross income, plus nontaxable interest, plus half your Social Security benefits. If you live on SSDI alone and have no other income, you owe no federal tax on it. If you have wages, self-employment income, pensions, or investment returns, the IRS counts those alongside your SSDI to decide whether any of your benefit is taxable.

The thresholds are fixed by law and do not change year to year. For a single filer in 2024, if combined income is $25,000 or less, no SSDI is taxable. Between $25,000 and $34,000, up to 50 percent of your benefits may be taxable. Above $34,000, up to 85 percent may be taxable. For married couples filing jointly, the thresholds are $32,000 and $44,000. These same thresholds have been in place since 1984 and are not indexed to inflation, which means more people cross them each year.

Key Takeaways

  • SSDI is only taxable if your combined income (wages, pensions, investments, plus half your benefits) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • If SSDI is your only income, you owe no federal income tax on it, even if you receive the full benefit amount.
  • The IRS uses a formula to calculate the taxable portion, which can be up to 50 percent or 85 percent of your benefit depending on how far above the threshold you are.
  • State income tax treatment varies: some states tax SSDI, others do not, and a few tax it only under certain conditions.
  • You can request that the Social Security Administration withhold federal income tax from your benefit payments to avoid a tax bill at filing time.

How the IRS calculates the taxable amount

The calculation uses a two-tier system. First, the IRS adds up your combined income. If it exceeds $25,000 (or $32,000 for married filing jointly), the excess is compared to $9,000 (or $12,000 for married filing jointly). The smaller of these two numbers is multiplied by 0.50 — meaning up to 50 percent of your benefits may be taxable at this tier.

If combined income exceeds the second threshold — $34,000 for single filers or $44,000 for married couples — the amount above that threshold is multiplied by 0.85, and added to any amount already taxable from the first tier. This means up to 85 percent of your SSDI can be taxable if your combined income is high enough. The formula is complex, but the Social Security Administration provides a worksheet in IRS Publication 915, and many tax software programs calculate it automatically.

Example: You are single, receive $1,200 per month in SSDI ($14,400 per year), and have $15,000 in wages. Your combined income is $15,000 + $7,200 (half your benefits) = $22,200. This is below $25,000, so none of your SSDI is taxable. If instead you had $20,000 in wages, combined income would be $27,200. The excess over $25,000 is $2,200. The smaller of $2,200 and $9,000 is $2,200, multiplied by 0.50 = $1,100 taxable.

State income tax and SSDI

Federal tax rules do not bind the states. Most states do not tax SSDI at all, but some do. Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont all tax SSDI under their state income tax systems. The rules vary by state: some follow the federal thresholds, others use different income limits, and some tax only a portion of the benefit.

A few states tax SSDI only if your income exceeds a certain level. For example, Missouri taxes SSDI only if your federal adjusted gross income exceeds $100,000 for married couples or $50,000 for single filers. If you live in a state that taxes SSDI, you will need to report it on your state return even if it is not taxable federally. Check your state's department of revenue website or ask a tax preparer familiar with your state's rules.

Withholding taxes from your SSDI payments

You do not have to wait until tax time to pay federal income tax on SSDI. You can ask the Social Security Administration to withhold a fixed amount from your monthly benefit payment. This works the same way withholding works on wages: money comes out each month, and you get credit for it when you file your return.

To set up withholding, complete Form W-4V (Voluntary Withholding Request) and submit it to your local Social Security office, by mail to Social Security, or online through your my Social Security account. You can choose to have 7, 10, 15, or 25 percent of your benefit withheld, or you can request a specific dollar amount. If your tax situation changes — for example, you start working or your investment income drops — you can update your withholding request at any time.

Withholding is optional, but it can prevent a large tax bill in April. If you know SSDI will be taxable and you have no other source of withholding, requesting 10 or 15 percent is often enough to cover the tax owed.

How work and earnings affect SSDI taxation

Wages from work count toward your combined income and can push SSDI into taxable territory. If you are under full retirement age and working, you also face the Social Security earnings test, which reduces your benefit by $1 for every $2 you earn above an annual limit (the limit is $23,400 in 2024, but changes yearly). However, the earnings test and SSDI taxation are separate rules. You can owe income tax on SSDI even if the earnings test does not reduce your benefit, and vice versa.

Self-employment income counts the same way as wages for tax purposes. If you are self-employed and receiving SSDI, your net self-employment income (after business expenses) is part of your combined income. You also owe self-employment tax on that income, which is separate from income tax on SSDI.

Reporting SSDI on your tax return

Social Security sends you a Form SSA-1099 each January showing the total SSDI you received in the prior year. You use this form to report SSDI on your federal return. If any of your SSDI is taxable, you report it on Form 1040 (the main individual income tax return) and may also need to complete a worksheet in IRS Publication 915 to calculate the taxable amount.

If you file electronically, tax software will usually walk you through the calculation. If you file by hand, the worksheet in Publication 915 is the standard method. The taxable portion of SSDI is reported as income on line 5b of Form 1040, separate from any untaxable portion on line 5a.

If you did not have enough withholding and owe tax, you can pay it with your return or set up a payment plan with the IRS. If you had too much withheld, you will receive a refund.

Medicare premiums and SSDI taxation

SSDI recipients automatically receive Medicare at age 65 (or after 24 months of SSDI if disabled before 65). Your Medicare Part B and Part D premiums are usually deducted directly from your SSDI payment. These deductions do not reduce your taxable SSDI — the IRS taxes the full benefit amount before any deductions are taken out. However, if your income is high enough, you may also owe an additional premium surcharge called Income-Related Monthly Adjustment Amount (IRMAA), which is based on your modified adjusted gross income from two years prior.

IRMAA can create a situation where SSDI taxation and Medicare costs interact. If you have other income that pushes you into a higher IRMAA bracket, you may owe both higher Medicare premiums and higher income tax on SSDI. Planning for both is important if you have substantial wages, pensions, or investment income.

Frequently Asked Questions

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

No. If SSDI is your only income and you are not required to file for other reasons, you do not need to file a federal return. However, if you have any other income — wages, self-employment, interest, dividends, or capital gains — you may be required to file, and you should check the IRS filing requirements for your situation.

Can I reduce the amount of SSDI that is taxable by earning less?

Yes, but only if the income you are earning is discretionary. If you reduce wages or self-employment income, your combined income drops, and less (or none) of your SSDI becomes taxable. However, if you are working to support yourself, this trade-off may not be practical. Some people use work incentives like the Plan to Achieve Self-Support (PASS) to exclude certain earnings from income calculations, which can help.

What if I disagree with the taxable amount calculated by the IRS?

You can recalculate using the worksheet in IRS Publication 915 or ask a tax professional to review your return. If you believe an error was made, you can file an amended return (Form 1040-X) within three years. The IRS also has a dispute process if you disagree with an assessment.

Do I owe self-employment tax on SSDI?

No. SSDI itself is not subject to self-employment tax. However, if you are self-employed and have net self-employment income, you owe self-employment tax on that income. Self-employment tax and SSDI income tax are calculated separately.

If I move to a state that taxes SSDI, do I owe back taxes?

No. You owe state tax on SSDI only for tax years in which you were a resident of that state. If you move to a state that taxes SSDI, you begin owing state tax on SSDI starting with the tax year in which you moved there, not retroactively.