Whether you owe taxes on SSDI depends on your total income, not just your benefits

Social Security Disability Insurance (SSDI) benefits are not automatically taxable. Whether you owe federal income tax on them depends on your "combined income" — a calculation that includes your SSDI, other earnings, and certain non-taxable income added together. If your combined income stays below a specific threshold, you pay no tax on your SSDI. If it goes above that threshold, a portion of your benefits becomes taxable.

The threshold is low. For a single person with no other dependents, it starts at $25,000. For a married couple filing jointly, it starts at $32,000. These numbers have not changed since 1984, which is why many people on SSDI end up owing tax even though they thought their benefits were protected.

If you do owe tax and had it withheld from your SSDI payments, or if you paid estimated tax during the year, you may receive a refund. The process is the same as for anyone else: you file a tax return, report all your income, and the IRS calculates what you owe versus what you already paid.

Key Takeaways

  • SSDI benefits are only taxable if your combined income (benefits plus other earnings plus certain non-taxable income) exceeds $25,000 for single filers or $32,000 for married couples filing jointly.
  • If you have other income from work, pensions, or investments, that income counts toward the threshold and may push your SSDI into taxable territory.
  • You can request that the Social Security Administration withhold federal income tax from your SSDI payments to avoid owing a large amount at tax time.
  • To receive a refund, you must file a federal income tax return even if you normally would not have to, because the IRS will not know about your withholding otherwise.

How the combined income calculation works

The IRS uses a specific formula to determine how much of your SSDI is taxable. It is called "combined income," and it includes your adjusted gross income plus non-taxable interest plus half of your SSDI benefits.

Here is a concrete example: suppose you receive $1,200 per month in SSDI ($14,400 per year) and you have no other income. Half of your SSDI is $7,200. Your combined income is $7,200. Since $7,200 is below $25,000, none of your SSDI is taxable, and you owe no federal income tax.

Now suppose you also work part-time and earn $15,000 per year. Your combined income is now $15,000 (your wages) plus $7,200 (half your SSDI) = $22,200. Still below $25,000, so still no tax owed on SSDI.

But if you earn $20,000 and receive $14,400 in SSDI, your combined income is $20,000 plus $7,200 = $27,200. You have exceeded the $25,000 threshold by $2,200. The IRS will tax up to 85% of your SSDI, though the actual amount taxed is usually much less. In this case, roughly $1,000 to $1,500 of your SSDI would be taxable.

Other income that counts toward the threshold

Work income is the most common source, but it is not the only one. Pensions, interest, dividends, rental income, and self-employment income all count. Even income from a spouse's job counts if you file jointly.

Some income does not count. Supplemental Security Income (SSI) does not count. Veterans benefits do not count. Workers' compensation does not count. Gifts and inheritances do not count. But if you are unsure whether a particular income source counts, the safest approach is to include it in your calculation or ask a tax preparer.

Non-taxable interest — interest from municipal bonds, for example — also counts toward the threshold even though you do not owe tax on it. This is one of the reasons the threshold can be deceptive. You might have very little taxable income but still trigger SSDI taxation because of non-taxable sources.

Requesting tax withholding from your SSDI payments

You can ask the Social Security Administration to withhold federal income tax directly from your SSDI benefit each month. This is done using Form W-4V, which you can request by phone, mail, or in person at your local Social Security office.

To request withholding, call Social Security at 1-800-772-1213 (TTY 1-800-325-0778) and ask for Form W-4V. You can also visit your local Social Security office or read the form from ssa.gov. On the form, you choose a withholding rate: 7%, 10%, 15%, or 25% of your monthly benefit.

Withholding does not change how much tax you owe — it just spreads the payment across the year instead of making you pay it all at once when you file your return. If you withhold too much, you get a refund. If you withhold too little, you owe more when you file. The goal is to withhold roughly the amount you expect to owe so that you break even or come close.

Filing a tax return to claim your refund

If you had tax withheld from your SSDI or paid estimated tax during the year, you must file a federal income tax return to receive your refund. The IRS will not send you a refund without a return, even if you are may have access to to one.

You can file using IRS Free File if your income is below a certain threshold (the limit changes each year). You can also use tax software, work with a tax preparer, or go to a free tax clinic in your area. The IRS Volunteer Income Tax information (VITA) program offers free preparation at libraries, community centers, and other locations.

When you file, you will report your SSDI on line 5b of Form 1040 (the main federal tax form). You will also report any other income you received. The IRS will calculate how much of your SSDI is taxable based on your combined income, and your refund will be based on the total tax you owe minus what you already paid.

What happens if you do not file a return

If you had tax withheld but do not file a return, that withheld money stays with the IRS. You will not receive it back. The IRS has no way to know you are may have access to to a refund unless you tell them by filing.

There is no penalty for not filing if you do not owe tax. But if you had withholding, you are essentially giving the government an interest-free loan. Filing takes a few hours and can put money back in your pocket, so it is worth doing if you had any withholding.

Frequently Asked Questions

Can I get a refund if I did not have taxes withheld?

Only if you paid estimated tax during the year. If you had no withholding and made no estimated payments, you have nothing to refund. However, if you owed tax and did not pay it, you will owe when you file.

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

Not unless your combined income exceeds the threshold or you had tax withheld. If your SSDI is your only income and it is below $25,000, you have no tax obligation. But if you had withholding, filing a return will get your money back.

What if I work and receive SSDI — do I owe tax on my wages?

Yes, you owe tax on your wages as usual. The question is whether your SSDI is also taxable, which depends on whether your combined income exceeds the threshold. Your wages always count toward that threshold.

Can I change my withholding amount after I submit Form W-4V?

Yes. You can submit a new Form W-4V at any time to increase, decrease, or stop withholding. Changes usually take effect within one or two months.

What if I owe more tax than I expected when I file?

You can pay the balance when you file your return, set up a payment plan with the IRS, or request an extension to file. The IRS website has payment options, or you can call 1-800-829-1040 to discuss your situation.