Social Security Disability Insurance vs. Supplemental Security Income
The two programs have different tax treatment:
- SSDI: Based on your work record and Social Security taxes paid. The IRS taxes it under the same rules as Social Security retirement benefits.
- SSI: A needs-based benefit for people with limited income and resources. SSI payments aren’t taxable.
How the IRS determines whether SSDI is taxable
The IRS uses combined income, sometimes called provisional income, to determine whether your benefits may be taxable. It generally includes your adjusted gross income (AGI), which is your gross income after certain adjustments, plus tax-exempt interest and half your annual SSDI benefits.
The current federal thresholds apply for tax years 2025 and 2026:
| Filing status | Base amount | Higher threshold |
|---|---|---|
| Single, head of household, or qualifying surviving spouse | $25,000 | $34,000 |
| Married filing jointly | $32,000 | $44,000 |
| Married filing separately and lived apart all year | $25,000 | $34,000 |
| Married filing separately and lived with a spouse at any time | $0 | Special rules apply |
Source: Internal Revenue Service (1,2)
Taxable portion of SSDI benefits
The taxable portion depends on your combined income:
- Above the base amount: Up to 50% of your SSDI benefits may be taxable.
- Above the higher threshold: Up to 85% of your benefits may be taxable.
- Filing jointly: You must include both spouses’ income and Social Security benefits in the calculation.
Note: An 85% taxable amount doesn’t mean you pay an 85% tax rate. It means up to 85% of your SSDI benefits may be added to your taxable income.
SSDI back pay and lump-sum payments
If you receive a lump-sum SSDI payment for earlier years, you may be able to use the IRS lump-sum election. This calculates the taxable amount using income from the years the benefits cover and may reduce the amount included in income for the year you received the payment.
Filing when SSDI is your only income
If SSDI is your only income, your benefits generally aren’t taxable, and you probably won’t need to file a federal return. Other filing requirements may still apply.
How to report or pay taxes on SSDI
You’ll report SSDI income on Form 1040 when you file your federal income tax return. To calculate the taxable amount to include, use Form SSA-1099 and the worksheet in IRS Publication 915 to calculate the taxable amount, or enter your information into the IRS Interactive Tax Assistant for additional guidance.
If you expect to owe tax, you can ask the Social Security Administration to withhold federal income tax from your benefits or make estimated tax payments.
