Free Illinois Tax Calculator

4.95%. That's it. One flat rate for every Illinois resident, whether you pull in $30K or $300K. No brackets to figure out, no guessing which rate applies. Honestly, it's kinda nice not having to navigate a bracket system — even if 4.95% isn't exactly cheap compared to the zero-tax states. You get a $2,775 personal exemption for 2026 that comes off the top, so on a $75,000 salary you're taxed on $72,225, which comes out to $3,575.14 in state tax. The math is easy to check. My cousin moved from Chicago to Austin last year and he said the state tax savings alone covered his moving costs within about 8 months.

On top of Illinois tax you've got the federal progressive brackets with the standard deduction, plus FICA at 7.65% combined. 401(k) contributions are your friend here — they reduce taxable income at both the federal and state level, so every dollar you put in saves you money twice.

One thing people don't expect: Illinois has no state standard deduction, just that personal exemption. But there's a real silver lining if you're anywhere near retirement. Illinois doesn't touch Social Security benefits, 401(k) distributions, IRA withdrawals, or pension income. The property taxes are brutal — no argument there — but for retirees specifically, the income tax picture is honestly pretty decent.