Most people on SSDI pay no federal income tax on their benefits

Whether you owe federal income tax on your SSDI payments depends on your combined income—not just what Social Security sends you. If your combined income stays below a certain threshold, you pay nothing. If it goes above that threshold, you may owe tax on part of your benefits, but rarely on all of it.

Combined income is a specific calculation: your adjusted gross income, plus nontaxable interest, plus half of your Social Security benefits. The thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds have not changed since 1984.

Most people receiving SSDI have little or no other income, so they fall below the threshold and owe no tax. But if you work part-time, receive a pension, have investment income, or are married and file jointly with a working spouse, you may cross the threshold.

Key Takeaways

  • You calculate whether you owe tax using combined income, which includes half your SSDI benefits plus all other income sources.
  • If your combined income is under $25,000 (single) or $32,000 (married filing jointly), you owe no federal tax on your SSDI.
  • If you cross the threshold, only up to 85 percent of your benefits can be taxed, and usually it is much less.
  • Social Security does not withhold federal income tax automatically, so you may need to make quarterly estimated tax payments if you owe.
  • State income tax rules vary—some states do not tax SSDI at all, while others follow federal rules or have their own thresholds.

How to calculate your combined income

Start with your adjusted gross income (AGI)—the number on line 11 of your Form 1040 tax return. Add any nontaxable interest you received, such as interest from municipal bonds. Then add half of your total SSDI benefits for the year.

That sum is your combined income. Compare it to the threshold for your filing status. If you are single and your combined income is $25,000 or less, you owe no federal tax on your SSDI. If you are married filing jointly and your combined income is $32,000 or less, you owe no tax.

Example: You are single and receive $12,000 in SSDI for the year. You also work part-time and earn $15,000. Your AGI is $15,000. Half your SSDI is $6,000. Your combined income is $15,000 + $6,000 = $21,000. Since $21,000 is below $25,000, you owe no federal tax on your SSDI, even though you have other income.

What happens if you go over the threshold

If your combined income exceeds the threshold, you do not automatically owe tax on all your benefits. The tax code limits how much of your SSDI can be taxed to either 50 percent or 85 percent of your benefits, depending on how far over the threshold you go.

The calculation is complex and involves two separate formulas. The IRS publishes a worksheet in the instructions to Form 1040 that walks through it step by step. Many people find it easier to use tax software or ask a tax preparer to do the calculation.

In practice, most people who owe tax on SSDI owe tax on only a small portion of their benefits. Someone would have to have substantial other income—typically $40,000 or more in combined income—before 85 percent of their benefits could be taxed.

Social Security does not withhold tax automatically

Unlike wages from an employer, Social Security does not withhold federal income tax from your SSDI check unless you ask them to. If you owe tax, you have two options: request that Social Security withhold a flat amount each month, or make quarterly estimated tax payments to the IRS yourself.

To request withholding, fill out Form W-4V and send it to your local Social Security office or mail it to the address on your SSDI payment statement. You can choose to have 7, 10, 12, or 22 percent of your benefit withheld each month. Many people choose 10 or 12 percent as a rough estimate.

If you do not withhold and you owe tax at the end of the year, you may owe a penalty for underpayment of estimated tax. The penalty is small if you owe a small amount, but it adds up if you owe several hundred dollars or more. Withholding or making estimated payments avoids the penalty.

State income tax on SSDI varies by where you live

Nine states do not have a state income tax at all: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, Wyoming, and New Hampshire (which taxes only dividends and interest, not wages or SSDI). If you live in one of these states, you owe no state tax on your SSDI.

Most other states follow the federal rule: if you owe federal tax on your SSDI, you also owe state tax. A few states have their own rules. Colorado, for example, does not tax SSDI at all. Illinois taxes SSDI only if your income is above a higher threshold than the federal one.

Check your state's tax agency website or ask a tax preparer in your state what the rule is where you live. State rules change occasionally, so it is worth checking each year if you are close to owing tax.

What to do if you think you might owe tax

If you have income from work, a pension, investments, or a spouse's income, calculate your combined income using the worksheet above. If you are below the threshold, you owe nothing and do not need to file a federal tax return just because of your SSDI.

If you are above the threshold or unsure, you have two safe options. One is to request withholding on Form W-4V so that Social Security holds back money each month. The other is to file a tax return and pay what you owe, or use tax software to calculate it. Many tax preparation services offer free filing for people with low to moderate income.

Keep your Social Security Benefit Statement (Form SSA-1099), which arrives in January each year. It shows your total SSDI for the previous year and is what you use to calculate combined income. If you lose it, you can request a replacement from Social Security's website or by calling 1-800-772-1213.

Frequently Asked Questions

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

No. If SSDI is your only income and you are below the threshold for your filing status, you do not have to file a federal tax return. Social Security will not report your benefits as taxable income to the IRS if you do not owe tax on them.

What if I work and receive SSDI at the same time?

Your work income counts toward your combined income for tax purposes. If your wages plus half your SSDI benefits exceed the threshold, you may owe tax on part of your benefits. You also need to check SSDI's earnings limit—you can earn up to $1,550 per month (in 2024) without losing benefits, but the amount changes yearly.

Can I deduct medical expenses related to my disability?

Only if your total medical expenses exceed 7.5 percent of your adjusted gross income. This is a high bar for most people. SSDI benefits themselves are not deductible, and you cannot deduct the cost of receiving SSDI payments.

What if I owe back taxes from years I received SSDI?

Contact the IRS directly or work with a tax professional. The IRS has payment plans and sometimes offers relief for people who owe back taxes. Do not ignore the bill—the IRS can garnish SSDI payments, though federal law limits how much they can take.

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

No. Each person calculates their own combined income separately, even if you file a joint tax return. Your spouse's SSDI does not count in your calculation, and yours does not count in theirs.