Social Security Disability Insurance (SSDI) payments may be taxable, depending on your total income for the year

Whether you owe federal income tax on your SSDI benefits depends on how much other income you receive. The Social Security Administration (SSA) uses a formula based on your combined income — not just your SSDI payment alone. If your combined income falls below a certain threshold, your benefits are not taxed. If it exceeds that threshold, up to 50 percent or 85 percent of your benefits may be subject to federal income tax.

Combined income is calculated by taking your adjusted gross income, plus any nontaxable interest, plus half of your Social Security benefits. The SSA publishes a worksheet each year to help you figure this number. State taxes work differently: some states do not tax SSDI at all, while others follow the federal rules or have their own thresholds.

Key Takeaways

  • Your SSDI benefits are taxable only if your combined income — adjusted gross income plus nontaxable interest plus half your benefits — exceeds $25,000 for a single filer or $32,000 for married filing jointly.
  • If you have other income from work, pensions, or investments, that income counts toward the threshold that triggers taxation of your benefits.
  • The SSA does not automatically withhold taxes from SSDI payments, so you may need to make quarterly estimated tax payments or request withholding if you expect to owe.
  • State tax treatment of SSDI varies: some states exempt it entirely, while others tax it the same way the federal government does.

How the combined income calculation works

The SSA uses a specific formula to determine whether your benefits are taxable. Start with your adjusted gross income (AGI) — the number from your tax return after deductions. Add any tax-exempt interest you received, such as interest from municipal bonds. Then add half of your total Social Security benefits for the year, including SSDI.

This combined income figure is what the SSA compares to the income thresholds. For 2024, the thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. If your combined income is below these amounts, none of your SSDI is taxable. If it is above these amounts, you may owe tax on a portion of your benefits.

The SSA publishes a worksheet in Publication 915 each year to walk through this calculation. You can find it on the SSA website or request a copy by phone. The worksheet accounts for different filing statuses and helps you determine the exact amount of benefits subject to tax.

What counts as income for this calculation

Income from wages, self-employment, pensions, annuities, and investment earnings all count toward your combined income. Distributions from retirement accounts such as 401(k)s and traditional IRAs count as well. Even if you do not have to report certain types of income on your tax return, they may still count for the Social Security tax calculation — this is why nontaxable interest is added back in.

Some types of income do not count. Supplemental Security Income (SSI) payments do not count. Veteran's benefits do not count. Gifts and inheritances do not count. Workers' compensation does not count. The key is whether the income is part of your adjusted gross income or is specifically listed as nontaxable interest.

If you are married filing jointly, the SSA combines your income with your spouse's income, even if your spouse does not receive Social Security benefits. This can push a couple over the threshold even if each person's individual income is low.

Tax withholding and estimated payments

Unlike wages from an employer, the SSA does not automatically withhold federal income tax from SSDI payments. If you expect to owe tax on your benefits, you have two options: request that the SSA withhold taxes from your monthly payment, or make quarterly estimated tax payments to the IRS.

To request withholding, complete Form W-4V and submit it to your local Social Security office or mail it to the address on the form. You can choose to have 7, 10, 12, or 22 percent of your monthly benefit withheld. This is simpler than making quarterly payments, but it may not be enough if you have other income that is not subject to withholding.

If you make quarterly estimated payments instead, you file Form 1040-ES with the IRS four times per year. The due dates are April 15, June 15, September 15, and January 15. Underestimating your tax liability can result in penalties, so use the SSA worksheet or consult a tax professional to calculate the correct amount.

State tax treatment of SSDI

Thirteen states tax Social Security benefits in some form: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The rules vary by state. Some follow the federal thresholds exactly. Others have lower thresholds or tax a higher percentage of benefits. A few states have phased out taxation of Social Security over time.

If you live in one of these states and your combined income exceeds the state threshold, you may owe state income tax on your SSDI even if you do not owe federal tax. You will need to check your state's tax agency website or contact them directly to find the current thresholds and rules for your filing status.

If you live in a state that does not tax Social Security — including California, Florida, Illinois, and Texas — you will not owe state income tax on your SSDI benefits regardless of your combined income. However, you may still owe federal tax if your combined income exceeds the federal threshold.

Reporting SSDI on your tax return

The SSA sends you a Form SSA-1099 each January showing the total benefits you received in the previous year. This form lists your SSDI in box 5. You use this amount to calculate your combined income and determine whether your benefits are taxable.

If your benefits are taxable, you report the taxable portion on your Form 1040 or 1040-SR. The taxable amount goes on line 5b. You do not report the full benefit amount — only the portion that the SSA worksheet determines is subject to tax. This is why the calculation matters: it directly affects how much you report to the IRS.

If you received benefits for only part of the year — for example, if you started receiving SSDI in June — the Form SSA-1099 will show only the months you received payments. Use that actual amount in your calculation, not a full-year estimate.

What happens if you do not pay tax on taxable benefits

If you owe tax on your SSDI benefits and do not pay it, the IRS will send you a notice. You may owe penalties and interest on top of the original tax amount. If the amount is large enough, the IRS can offset your future tax refunds or, in some cases, reduce your Social Security benefits to collect the debt.

If you realize you underpaid in a previous year, you can file an amended return using Form 1040-X. The IRS generally allows you to go back three years to correct a return. Filing an amended return voluntarily is better than waiting for the IRS to contact you, as it may reduce penalties.

Frequently Asked Questions

Can I reduce my taxable SSDI by lowering my other income?

Yes, if you have control over when you receive income. For example, if you work part-time, you might defer some earnings to the next year. If you have investment income, you might time the sale of assets. However, you cannot reduce nontaxable interest or defer pension payments without consequences, so this strategy works only in limited situations.

Does working part-time while on SSDI affect whether my benefits are taxed?

Yes. Wages from work count as part of your adjusted gross income and push your combined income higher. This can trigger taxation of your benefits. However, SSDI has no earnings limit once you reach full retirement age, so the tax effect is the only financial consequence of working at that point.

If I am married and my spouse does not receive Social Security, do we still use the married filing jointly threshold?

Yes. The SSA combines your income with your spouse's income for the purpose of determining the threshold, even if your spouse receives no Social Security benefits. This can result in your benefits being taxed when they would not be if you filed separately, though married filing separately has its own complications with Social Security taxation.

What if I receive both SSDI and retirement Social Security benefits?

The SSA combines both types of benefits when calculating your combined income. The total of both payments goes into the formula. However, only the portion of your total benefits that exceeds the threshold is taxable — the SSA does not tax SSDI and retirement benefits separately.

Do I need to file a tax return if my only income is SSDI?

No, not if your combined income is below the threshold and you have no other filing requirement. However, if you had taxes withheld from your SSDI or made estimated payments, you should file to claim a refund of the overpayment.