Illinois does not tax pension income at the state level

Illinois has a constitutional rule that exempts pension income from state income tax. This means if you receive a pension from a former employer, the Illinois Department of Revenue will not collect state tax on those payments. The exemption applies to pensions from public employers (like teachers, police, and government workers) and private employers alike.

You will still owe federal income tax on your pension, and you may owe taxes to other states if you moved after retiring. But Illinois itself does not tax the pension check itself. This is different from how Illinois treats other retirement income like Social Security or distributions from IRAs.

Key Takeaways

  • Illinois state income tax does not explore to pension payments from either public or private employers.
  • Federal income tax still applies to your pension, and you should have federal withholding set up with your pension administrator.
  • If you moved to Illinois after retiring, you may still owe tax to your former state on pension income earned while you lived there.
  • Pension income is treated differently from IRA withdrawals and Social Security, which have their own tax rules in Illinois.

What counts as a pension under Illinois law

The Illinois pension tax exemption covers regular, recurring payments from a retirement plan based on your years of service or age. This includes pensions from school districts, police and fire departments, municipal governments, and private company pension plans. The payment must be from a plan that was set up specifically as a pension or retirement benefit.

The exemption does not cover lump-sum distributions you take all at once, even if they come from a pension plan. If your former employer offers you the choice between monthly pension payments or one large payout, only the monthly option qualifies for the Illinois exemption. Lump sums are treated as ordinary income and subject to both federal and Illinois state tax.

Federal tax still applies to pension income

Even though Illinois does not tax your pension, the federal government does. When you start receiving pension payments, your pension administrator should ask you to complete a W-4P form, which tells them how much federal tax to withhold from each check. If you do not complete this form, the administrator will withhold a flat percentage, usually 10 percent.

You can adjust your federal withholding at any time by submitting a new W-4P to your pension administrator. If you have other income sources or expect to owe a large tax bill, you may want to increase withholding. If you are retired and have no other income, you might lower it. The goal is to have enough withheld so you do not owe a large amount when you file your federal return in April.

Pensions from other states and reciprocal agreements

If you worked and earned a pension in another state before moving to Illinois, you may still owe tax to that state on the portion of the pension you earned while living there. This is called source-based taxation — the state where you earned the income can tax it, regardless of where you live now. For example, if you worked 20 years in California and earned a pension, California may tax the part of your pension that corresponds to those 20 years, even if you now live in Illinois.

Some states have reciprocal agreements that reduce or eliminate this tax, but Illinois does not participate in most reciprocal pension agreements. You should contact the tax authority in your former state to find out whether they tax your pension. Many states exempt pensions entirely, but some do not, and the rules vary widely. Your pension administrator or a tax professional can help you determine what you owe.

How to report pension income on your Illinois return

When you file your Illinois state income tax return (Form IL-1040), you do not report your pension income on the main return because it is exempt. However, you still need to file a return if you have other income subject to Illinois tax, such as wages, interest, dividends, or capital gains. Your pension payments will not appear as taxable income on your state return.

On your federal return (Form 1040), you must report your pension income on line 5a under "Pensions and annuities." You will receive a Form 1099-R from your pension administrator showing the total amount paid to you during the year and the federal tax withheld. Use this form to fill in your federal return. The federal government taxes your full pension amount, minus any non-taxable contributions you made to the plan before retirement.

Pension income and other Illinois tax situations

Illinois treats different types of retirement income differently. Social Security benefits are not taxed by Illinois, but they are taxed by the federal government for some retirees depending on their total income. IRA distributions and 401(k) withdrawals are taxed by both the federal government and Illinois, unlike pensions. If you have multiple sources of retirement income, each one follows its own tax rule.

If you are still working part-time while receiving a pension, your wages are subject to both federal and Illinois state tax. Some pension plans reduce your monthly payment if you earn above a certain amount while still employed, so check your plan documents. This is separate from taxation — it is a benefit reduction rule that some plans enforce.

Frequently Asked Questions

Do I have to file an Illinois state tax return if I only have pension income?

No. If your only income is a pension, you do not have to file an Illinois state return because pension income is exempt. You still must file a federal return if your income exceeds the federal filing threshold, which varies by age and filing status.

What if I moved to Illinois after I retired — do I owe Illinois tax on my pension?

No. Illinois does not tax pension income regardless of when you moved to the state. However, your former state may tax the portion of your pension earned while you lived there. Contact that state's tax authority to find out.

Can I reduce my federal withholding on my pension?

Yes. Submit a new Form W-4P to your pension administrator to change your federal withholding. You can lower it if you have no other income, but be careful — if too little is withheld, you may owe money when you file your federal return.

Is a lump-sum pension payment taxed differently than monthly payments?

Yes. Lump-sum distributions are taxed as ordinary income by both the federal government and Illinois, and do not may have access to for the Illinois pension exemption. Monthly pension payments are exempt from Illinois tax but still subject to federal tax.

Do I need to report my pension on my Illinois return if it is not taxed?

No. You do not report exempt pension income on your Illinois return. Report it only on your federal return (Form 1040, line 5a) using the Form 1099-R your administrator sends you.