Illinois does not tax SSDI benefits, whether you file state income tax or not

Illinois is one of the states that does not tax Social Security Disability Insurance (SSDI) income. This means your SSDI payments are not subject to Illinois state income tax, even if you have other income that requires you to file a return. You do not report SSDI on your Illinois Form IL-1040 or any other state tax form.

This is a straightforward rule: if your only income is SSDI, you have no Illinois state income tax obligation related to those payments. If you have other income—wages, self-employment, interest, or retirement distributions—you may still owe Illinois tax on that income, but the SSDI portion is always excluded.

Key Takeaways

  • Illinois does not tax SSDI benefits at the state level, so you never report SSDI on your Illinois state income tax return.
  • If SSDI is your only income, you likely have no Illinois state income tax filing requirement.
  • If you have other income alongside SSDI, you must file and pay tax on the non-SSDI income, but SSDI itself remains untaxed.
  • Federal tax rules are separate from Illinois rules—the IRS may count SSDI toward your federal taxable income threshold even though Illinois does not tax it.

When you have SSDI plus other income

If you receive SSDI and also earn wages, self-employment income, or have retirement distributions, you must file an Illinois state return to report and pay tax on that other income. The SSDI portion is straightforward not included in the calculation.

For example, if you receive $1,200 per month in SSDI and earn $500 per month from part-time work, Illinois taxes only the $500 in wages. The $1,200 is excluded entirely. You report the wages on your return, calculate your Illinois tax on that amount, and pay what you owe—but SSDI never enters the equation.

This matters because it can lower your overall Illinois tax burden. Many people with SSDI who also work find that their state tax is much smaller than it would be if all their income were taxable.

Federal tax treatment is different from Illinois tax treatment

Do not assume that because Illinois does not tax SSDI, the federal government does not either. Federal tax rules and state tax rules are separate. The IRS may count part or all of your SSDI toward your federal taxable income threshold, depending on your total income and filing status.

When you file your federal return with the IRS, you report SSDI on line 5b of Form 1040. The IRS uses a formula to determine whether any of your SSDI is taxable at the federal level. Illinois, by contrast, straightforward excludes SSDI from state taxation entirely, with no formula or threshold.

This means you could owe federal income tax on SSDI while owing zero Illinois state income tax on the same payments. It also means you should not rely on your Illinois return to tell you what you owe the IRS. You need to calculate both separately.

How to report SSDI on your Illinois return

You do not report SSDI on your Illinois return at all. You do not enter it on any line, do not list it as income, and do not subtract it as an exclusion. It straightforward does not appear on the form.

If you file an Illinois return because you have other income, you report only that other income. If you receive a Form SSA-1099-B from Social Security showing your SSDI payments, you do not need to attach it to your Illinois return or reference it anywhere. Keep it for your records and for your federal return, but it has no role in your state filing.

If you are unsure whether you need to file an Illinois return at all, the rule is based on your non-SSDI income. Check the current filing thresholds on the Illinois Department of Revenue website or consult a tax preparer who knows your full income picture.

Work incentives and SSDI do not change the Illinois tax rule

If you are using a work incentive program—such as Plan to Achieve Self-Support (PASS), Impairment Related Work Expenses (IRWE), or Student Earned Income Exclusion (SEIE)—those programs affect your SSDI payment amount and your federal tax calculation, but they do not change how Illinois treats SSDI. Illinois still does not tax it.

Work incentives are designed to help you keep more of your SSDI while you work. They reduce the amount of earnings that count against your SSDI payment, which means you keep more SSDI and may earn more wages. Both the SSDI you keep and the wages you earn are subject to their respective tax rules—federal tax on SSDI (if applicable) and both federal and Illinois tax on wages. But Illinois never taxes the SSDI portion, regardless of which work incentive you use.

Medicare and Medicaid do not depend on Illinois tax status

Your may be able to access for Medicare and Medicaid is based on federal rules, not on whether Illinois taxes your income. If you receive SSDI, you are may have access to to Medicare after 24 months of SSDI payments, and you may be may have access to to Medicaid depending on your state and your income level. Neither program cares whether Illinois taxes your SSDI.

Illinois does have its own Medicaid program, but it follows federal income rules, not state tax rules. SSDI is counted as income for Medicaid purposes under federal law, even though Illinois does not tax it. This means you could have zero Illinois state income tax liability while still being over the Medicaid income limit. The two systems are independent.

Frequently Asked Questions

Do I have to file an Illinois tax return if SSDI is my only income?

No. If SSDI is your only income, you have no Illinois state income tax filing requirement. Illinois does not tax SSDI, so there is nothing to report. You may still want to file to claim the Earned Income Tax Credit or other credits if you have other income, but SSDI alone does not trigger a filing duty.

Will the IRS know that Illinois did not tax my SSDI?

The IRS and Illinois do not share tax liability information in a way that affects your federal return. You report SSDI to the IRS on your federal return regardless of what Illinois does. The IRS applies its own rules to determine if any SSDI is taxable federally. Your Illinois return does not influence that calculation.

If I owe federal tax on SSDI, do I also owe Illinois tax?

No. Federal and state tax are separate. You could owe federal income tax on SSDI while owing zero Illinois state income tax on the same payments. This is because Illinois excludes all SSDI from state taxation, while the IRS may count some or all of it depending on your total income.

Does Illinois tax my SSDI if I move there from another state?

Yes, Illinois applies its own tax rules to all residents, regardless of where they lived before. If you move to Illinois and receive SSDI, Illinois will not tax it. If you move out of Illinois, your new state's rules explore. Some states tax SSDI and some do not, so check your new state's rules when you move.

What if I receive both SSDI and SSA retirement benefits?

Illinois does not tax either SSDI or Social Security retirement benefits. Both are excluded from Illinois state income tax. The federal government may tax Social Security retirement benefits under different rules than SSDI, but Illinois treats both the same way: no state tax on either one.