How SSDI Payments Are Taxed

Whether you owe federal income tax on your SSDI payments depends on your combined income — not just what you receive from Social Security. The IRS counts SSDI the same way it counts retirement benefits: you may owe tax on part of your benefits if your total income crosses certain thresholds.

The calculation starts with your combined income, which is your adjusted gross income plus nontaxable interest plus half of your SSDI benefits. If that number stays below the threshold for your filing status, you owe no tax on your benefits. If it exceeds the threshold, you may owe tax on up to 50 percent or 85 percent of your benefits, depending on how far over you go.

The thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. These numbers have not changed since 1984 and do not adjust for inflation, which means more people cross them each year as wages and other income rise.

Key Takeaways

  • SSDI becomes taxable only if your combined income (wages, interest, other benefits, plus half your SSDI) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • If you cross the threshold, you may owe tax on 50 percent of your benefits; if you cross a second, higher threshold, up to 85 percent becomes taxable.
  • The IRS uses a worksheet to calculate the taxable portion, and you report it on Form 1040 or 1040-SR, not on a separate SSDI form.
  • Some states do not tax SSDI at all, while others tax it the same way the federal government does; you must check your state's rules separately.

The Two Tax Thresholds and How They Work

The IRS uses two separate thresholds to determine how much of your SSDI is taxable. The first threshold is $25,000 for single filers, $32,000 for married couples filing jointly, and $0 for married couples filing separately. If your combined income exceeds the first threshold, you may owe tax on up to 50 percent of your benefits.

The second threshold is $34,000 for single filers and $44,000 for married couples filing jointly. If your combined income exceeds this higher threshold, the taxable portion of your benefits can rise to as much as 85 percent. The exact amount depends on how far above each threshold you fall.

For example, a single person with $26,000 in combined income is $1,000 over the first threshold. Half of that $1,000 — or $500 — may be subject to tax. But if the same person had $35,000 in combined income, they would be $1,000 over the second threshold, and the calculation would allow up to 85 percent of their benefits to be taxed, not just 50 percent.

What Counts as Combined Income for SSDI Tax Purposes

Combined income is not the same as your total income. The IRS defines it as your adjusted gross income (AGI) plus nontaxable interest plus half of your SSDI benefits. This means income you might think is "off limits" can still push you over the threshold.

Wages, self-employment income, pensions, and distributions from retirement accounts all count toward combined income. So do interest and dividends, even if they are small. Nontaxable interest — such as interest from municipal bonds — also counts, which surprises many people. Conversely, some forms of income do not count: Supplemental Security Income (SSI) does not count, nor do veterans' benefits, workers' compensation, or certain railroad retirement benefits.

If you are married filing jointly, your spouse's income counts too, even if your spouse does not receive SSDI. This can push a couple over the threshold even when neither person's individual income would.

How to Calculate Your Taxable SSDI Amount

The IRS provides a worksheet in the instructions to Form 1040 and Form 1040-SR to calculate the taxable portion of your benefits. You do not file a separate form for SSDI; instead, you report the taxable amount on line 5b of Form 1040 or 1040-SR, labeled "Social Security benefits."

The worksheet requires you to enter your combined income, compare it to the thresholds, and work through a series of steps. The calculation is mechanical but can be confusing the first time. If you use tax software, it usually walks you through the questions and does the math. If you file by hand or with a tax preparer, the preparer can do the calculation for you.

Social Security also sends you a Form SSA-1099 each January showing the total SSDI you received in the prior year. You use this figure on your tax return. If you did not receive a Form SSA-1099 but received SSDI, contact Social Security to request one.

State Income Tax on 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 income level.

The remaining states tax SSDI under their own rules. Some follow the federal system closely; others tax SSDI more heavily or have different thresholds. Colorado, for instance, exempts SSDI entirely for residents over 55. Connecticut taxes SSDI the same way the federal government does. You must check your state's tax agency website or speak with a tax preparer who knows your state's rules.

If you moved to a new state during the year, you may owe tax to both states. Some states have reciprocal agreements that prevent double taxation, but you still need to file in both places and claim a credit on one return.

What Happens If You Owe Tax on SSDI

If you owe tax on your SSDI, you have the same options as anyone else who owes federal income tax: pay in full with your return, set up a payment plan with the IRS, or request an installment agreement. Social Security does not withhold income tax from SSDI payments automatically, so you must plan ahead.

You can request voluntary withholding by filing Form W-4V with Social Security. This allows you to have a flat dollar amount or a percentage of your monthly benefit withheld for taxes. Many people use this method to avoid a large tax bill at the end of the year. You can change or stop withholding at any time by filing a new Form W-4V.

If you did not withhold enough and owe tax when you file, you may also owe a penalty for underpayment of estimated tax. However, the IRS waives this penalty if you had no tax liability in the prior year or if your withholding and payments equal at least 90 percent of your current year tax or 100 percent of your prior year tax (110 percent if your prior year AGI was over $150,000).

How to Reduce Taxable SSDI Income

Because combined income determines whether SSDI is taxable, reducing other income can lower or eliminate your tax bill. If you have control over when you receive certain income — such as distributions from an IRA or the sale of an investment — timing those transactions to stay below the threshold may help.

Contributing to a traditional IRA or 401(k) reduces your adjusted gross income, which in turn reduces your combined income. If you are still working, increasing your 401(k) contribution can lower your AGI. If you are self-employed, business deductions also reduce AGI.

Conversely, Roth conversions and distributions from Roth IRAs do count toward combined income, even though they are not taxable as income themselves. This is one reason some people delay Roth conversions until after they begin receiving SSDI.

Frequently Asked Questions

Do I have to file a tax return if I only receive SSDI?

Not necessarily. If SSDI is your only income and it is below the standard deduction for your filing status, you do not have to file. However, if you have other income — wages, interest, or a pension — you may be required to file even if your SSDI alone would not trigger a filing requirement. Use the IRS interactive tool on IRS.gov to determine whether you must file.

Can I get a refund if I had too much tax withheld from my SSDI?

Yes. If you requested voluntary withholding on Form W-4V and too much was withheld, you will receive a refund when you file your tax return. You can also adjust your withholding by filing a new Form W-4V with Social Security to reduce the amount withheld in future months.

What if I earned wages and received SSDI in the same year?

Your wages count toward combined income, which may make your SSDI taxable. However, if you are under full retirement age and still working, Social Security may also reduce your SSDI benefit itself under the earnings test — a separate rule from taxation. Both rules can explore in the same year.

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

No. Only your own SSDI counts toward your combined income. However, if you file jointly, your spouse's other income (wages, pensions, interest) counts, and half of your spouse's SSDI is added to the calculation. This is why married couples filing jointly often face taxation of SSDI even when neither spouse has high individual income.

If I live in a state that does not tax SSDI, do I still owe federal tax?

Yes. State tax rules are separate from federal rules. Even if your state does not tax SSDI, you may still owe federal income tax on it if your combined income exceeds the federal thresholds. You must file both a federal return and a state return (if your state requires it) and calculate tax under each jurisdiction's rules.