Estimate your Illinois paycheck after federal & state taxes (IL)
* Estimate using 2024 federal brackets and Illinois state tax data. Does not include local taxes.
Illinois has a flat income tax rate of 4.95% on all taxable income. Illinois is constitutionally required to use a flat rate (a 2020 ballot measure to allow graduated rates was rejected by voters). The state does not tax retirement income including Social Security benefits, pensions, and 401(k)/IRA distributions, making it favorable for retirees despite the moderate flat rate.
| Tax Type | Details |
|---|---|
| Income Tax Structure | Flat rate of 4.95% on all taxable income |
| Top Marginal Rate | 4.95% |
| Standard Deduction | Uses personal exemptions rather than standard deduction |
This calculator covers all cities and counties in Illinois, including Chicago, Aurora, Naperville, Joliet, Rockford. Some localities may impose additional local income taxes not reflected in this estimate.
Enter your annual gross salary (before any deductions), select your filing status, and optionally enter any pre-tax deductions like 401(k) contributions or HSA contributions. The calculator will show your estimated take-home pay after federal income tax, Illinois state income tax, and FICA taxes (Social Security and Medicare). Results are shown annually, monthly, and per biweekly paycheck.