Whether you owe tax on disability income depends on your total income and filing status
The IRS taxes some disability income and not other disability income. The amount you owe—or whether you owe anything at all—depends on how much money you received that year, whether it came from Social Security or another source, and your filing status. If you received only SSDI (Social Security Disability Insurance), you may owe nothing. If you also received other income, you might owe tax on part of your benefits.
The key number is your combined income. The IRS adds up your adjusted gross income, nontaxable interest, and half of your Social Security or disability benefits. If that total exceeds a threshold that depends on your filing status, you will owe tax on a portion of your benefits—not all of them, just a portion.
Key Takeaways
- SSDI alone is usually not taxable if it is your only income, but you must still report it on your tax return.
- If you have other income—wages, self-employment income, pensions, or interest—you may owe tax on part of your SSDI.
- The IRS uses a "combined income" calculation that includes half your benefits plus all other income to determine if any benefits are taxable.
- Your filing status (single, married filing jointly, married filing separately) changes the income threshold at which benefits become taxable.
- You can reduce the amount of tax owed by having taxes withheld from your benefits or making quarterly estimated tax payments.
How the IRS calculates combined income
The IRS does not straightforward add up your benefits and other income. Instead, it uses a formula called combined income. This number equals your adjusted gross income plus nontaxable interest plus half of your disability benefits for the year.
Once you know your combined income, you compare it to a threshold. If your combined income is below the threshold for your filing status, none of your benefits are taxable. If it exceeds the threshold, some of your benefits become taxable. The IRS then calculates the taxable amount using a two-tier system: the first tier covers 85 percent of benefits above a higher threshold, and the second tier covers up to 50 percent of benefits above a lower threshold.
This means even if your combined income is above the threshold, you will not owe tax on your entire benefit amount—only on a portion of it. The exact portion depends on how far above the threshold your combined income falls.
Income thresholds by filing status
The threshold at which your benefits become taxable depends on how you file your taxes:
| Filing Status | First Threshold | Second Threshold |
|---|---|---|
| Single | $25,000 | $34,000 |
| Married filing jointly | $32,000 | $44,000 |
| Married filing separately | $0 | $0 |
If you are married and file separately, these thresholds do not explore in the usual way. The IRS treats married filing separately filers differently, and in most cases, if you have any combined income at all, some of your benefits will be taxable. This is one reason tax professionals often recommend that married couples file jointly rather than separately when one or both receive disability benefits.
What counts as income for this calculation
For the combined income calculation, the IRS counts wages, self-employment income, pensions, annuities, interest, dividends, capital gains, and rental income. It also counts income from a job you held while receiving benefits. Nontaxable interest from municipal bonds counts too, even though you do not owe federal tax on it.
Some income does not count. Supplemental Security Income (SSI) is not included in the combined income calculation. Neither is workers' compensation, or money you received as a gift or inheritance. If you received a refund of taxes you paid in a previous year, that refund does not count either.
The distinction matters because even a small amount of other income can push your combined income above the threshold and make part of your benefits taxable. For example, if you are single and received $1,000 in interest income, that $1,000 counts toward your combined income and could trigger taxation of your benefits.
How much of your benefits becomes taxable
The IRS uses a two-step calculation to determine the taxable portion. First, it calculates how much your combined income exceeds the first threshold. Up to 50 percent of that excess amount is taxable, but only up to a limit. Then it calculates how much your combined income exceeds the second threshold. Up to 85 percent of that excess amount is taxable.
The result is that you will owe tax on the greater of these two amounts, but never on more than 85 percent of your total benefits. This means even if your combined income is very high, at least 15 percent of your benefits remain tax-free.
The calculation is complex enough that most people use tax software or a tax professional to work through it. The IRS provides a worksheet in Publication 915 that walks through the steps, but doing it by hand is error-prone. If you use tax software, it will perform this calculation automatically once you enter your benefit amount and other income.
Reporting disability income on your tax return
You must report your disability benefits on your tax return even if none of them are taxable. Social Security sends you a form SSA-1099 in January showing the total benefits you received in the previous year. You use this form to fill out your tax return.
On the federal form 1040, you report your benefits on line 5b. If you use tax software, you enter the amount from your SSA-1099, and the software calculates whether any portion is taxable. If you file by hand, you use the worksheet in IRS Publication 915 to determine the taxable amount, then report that amount on line 5b.
Some states also tax disability benefits, though many do not. Check your state's tax rules or ask a tax professional whether you owe state tax on your SSDI.
Withholding taxes from your benefits
If you know you will owe tax on your benefits, you can ask Social Security to withhold taxes directly from your monthly payment. This works the same way as tax withholding from a paycheck—Social Security holds back a portion of your benefit and sends it to the IRS on your behalf.
To set up withholding, you complete form W-4V and send it to your local Social Security office or mail it to Social Security. You can choose to have 7, 10, 12, or 22 percent of your benefits withheld, or you can request a specific dollar amount. Having taxes withheld reduces the amount you receive each month but also reduces the risk of owing a large tax bill when you file.
Withholding is optional. Some people prefer to make quarterly estimated tax payments instead, especially if their income varies from year to year. Others choose not to withhold and straightforward pay the tax when they file their return. The right choice depends on your situation and your preference for managing cash flow.
Frequently Asked Questions
Do I have to file a tax return if I only received SSDI?
You must file a return if your combined income exceeds the threshold for your filing status, even if none of your benefits are taxable. However, if your only income was SSDI and your combined income is below the threshold, you do not have to file. That said, filing may benefit you if you are due a refund from taxes withheld or if you may have access to for the Earned Income Tax Credit.
What if I worked part-time while receiving SSDI?
Your wages count as income in the combined income calculation. This means your wages, plus half your benefits, plus any other income, determines whether your benefits are taxable. Many people who work while on SSDI end up owing tax on part of their benefits because their combined income exceeds the threshold.
Can I reduce my taxable benefits by reducing my other income?
Yes. If you control when you receive certain income—for example, if you can defer a bonus or delay selling an investment—timing that income in a different tax year can lower your combined income and reduce or eliminate taxation of your benefits. A tax professional can help you plan this strategy.
What if I disagree with the amount of tax I owe on my benefits?
Double-check your calculation using the worksheet in IRS Publication 915 or tax software. If you believe the IRS made an error, you can file an amended return on form 1040-X. If you owe additional tax and cannot pay it, you can contact the IRS about a payment plan or offer in compromise, though these options have strict requirements.
Do I owe tax on my benefits if I live outside the United States?
U.S. citizens and resident aliens owe federal tax on their SSDI benefits using the same rules as anyone else. Nonresident aliens face different rules and generally do not owe U.S. tax on their benefits, but this depends on their country of residence and tax treaties. Consult a tax professional if you live abroad.