Illinois does not tax pension income, with rare exceptions

Illinois has a constitutional rule that shields most pension income from state income tax. If you receive a pension from a government employer — federal, state, local, or military — Illinois will not tax it. The same protection applies to some private pensions and annuities, though the rules are narrower there.

The key word is "most." A few specific situations fall outside this protection. Understanding which pensions are taxed and which are not matters because it changes what you owe when you file your Illinois return, and it affects how much money actually lands in your account each month.

Key Takeaways

  • Government pensions — from federal, state, local, or military service — are completely exempt from Illinois income tax.
  • Private pensions and annuities are exempt only if they were purchased with pre-tax contributions or are part of a may have access to retirement plan.
  • Distributions from IRAs, 401(k)s, and similar retirement accounts are taxed as regular income in Illinois, even though they may be exempt in other states.
  • You do not need to report exempt pension income on your Illinois tax return, but you should keep records showing the source and amount.
  • If your pension includes a taxable portion — such as earnings on an after-tax contribution — only that portion is subject to Illinois tax.

Government pensions are fully protected from Illinois tax

If you worked for any government employer and receive a pension based on that service, Illinois will not tax it. This includes pensions from the federal government, any state government, any city or county, school districts, police and fire departments, and the military. The protection is absolute — there is no income limit, no phase-out, and no exception based on how much you earned or when you retired.

This rule applies whether you receive the pension as a monthly check or as a lump-sum distribution. It also applies if you are the surviving spouse or dependent of a government employee and receive a survivor's pension. The Illinois Department of Revenue does not require you to report these pensions on your state income tax return, though you will still report them on your federal return if you file one.

Private pensions and annuities have narrower protection

Private pensions — those from a non-government employer — receive tax protection only if they meet specific conditions. The pension must have been purchased with pre-tax dollars, meaning your employer made contributions on your behalf before income tax was withheld. It must also be part of a may have access to retirement plan under federal tax law, such as a traditional pension plan, ERISA plan, or similar structure.

If you bought an annuity with your own after-tax money, or if the annuity was purchased with funds that were already taxed, Illinois will tax the earnings portion when you receive payments. The return of your own contributions is not taxed, but the growth and interest are. This distinction matters because it means part of your payment may be taxable and part may not be.

IRAs and 401(k) distributions are taxed as income

Withdrawals from IRAs, 401(k)s, 403(b)s, and similar retirement savings accounts are treated as regular income by Illinois, even though some other states exempt them. If you withdraw $30,000 from a traditional IRA in a given year, Illinois taxes that $30,000 at your ordinary income tax rate. Roth IRA withdrawals of contributions are not taxed, but earnings are taxed if withdrawn before age 59½ and before the account has been open five years.

The same rule applies to distributions from SEP-IRAs, SIMPLE IRAs, and other self-employed retirement accounts. The only exception is if you are over 59½ and the distribution qualifies as a "pension or annuity" under federal law — a narrow category that requires the account to have been structured as a true pension plan, not a savings account.

How to report pension income on your Illinois return

If your pension is exempt from Illinois tax — because it is from a government employer or qualifies as a protected private pension — you do not report it on your Illinois Form IL-1040. You only report it on your federal return if you file one. The Illinois Department of Revenue does not need to see the income.

If part of your income is taxable — such as IRA distributions or earnings from an after-tax annuity — you report that on your Illinois return as part of your total income. You will receive a 1099-R form from the payer showing the gross distribution and any federal tax withheld. Use that form to calculate what portion is taxable in Illinois and report it on the appropriate line of your state return.

Keep copies of any documents showing the source of your pension income and whether it is from a government employer. If the Illinois Department of Revenue questions a return, you will need to prove that the income was exempt. A letter from your pension administrator or a copy of your pension agreement stating the employer type is usually sufficient.

What happens if you receive both taxable and exempt income

Many retirees receive income from multiple sources — a government pension that is exempt, Social Security that is partially taxable, and IRA withdrawals that are fully taxable. Illinois taxes only the portions that are not protected. You add up all your taxable income, subtract the standard deduction or itemized deductions, and pay tax on what remains.

The exempt pension does not reduce your taxable income from other sources. If you have a $40,000 government pension and $20,000 in IRA withdrawals, Illinois taxes only the $20,000 (minus deductions). The pension does not create a deduction or offset.

Frequently Asked Questions

Will I owe Illinois tax on my federal pension?

No. Federal pensions, including those from the military, federal civil service, and federal law enforcement, are completely exempt from Illinois income tax. You will not owe state tax on this income, though you may owe federal tax depending on your total income and filing status.

What if I retired from a private company and receive a pension?

It depends on how the pension was funded. If your employer contributed pre-tax dollars to a may have access to pension plan on your behalf, the pension is exempt. If you purchased an annuity with after-tax money or the plan was not may have access to, the earnings portion is taxable in Illinois. Contact your pension administrator to confirm the plan type and funding method.

Are my 401(k) withdrawals taxed by Illinois?

Yes. Withdrawals from 401(k)s, IRAs, and similar retirement savings accounts are taxed as regular income by Illinois. This is true even if you are over 59½ and avoid the federal early withdrawal penalty. The entire distribution is subject to Illinois income tax unless it qualifies as a true pension distribution, which is rare.

Do I have to file an Illinois return if I only have a government pension?

No. If your only income is an exempt government pension, you have no filing requirement in Illinois. You do not owe state tax and do not need to report the income. If you have other income — such as Social Security, IRA withdrawals, or wages — you may need to file depending on the total amount.

Can I claim a deduction for my pension contributions?

No. Illinois does not allow a deduction for pension contributions or allow you to reduce your taxable income based on pension income. The exemption is built into the tax code itself — exempt income is simply not taxed. You cannot deduct it or use it to lower your tax on other income.