Estimates using federal brackets, FICA and your state rate. Not tax advice.
Illinois uses a flat income tax, meaning the same 4.95 percent rate applies to all taxable wage income regardless of how much you earn. The state constitution actually prohibits a graduated rate structure, so the 4.95 percent flat rate is both the starting rate and the top rate for 2026. There are no brackets to move through and no phase-outs at higher incomes.
On a $65,000 salary, Illinois state income tax is about $3,218 per year before any credits or deductions your specific situation may allow. That works out to roughly $268 per month or $124 per biweekly paycheck. Illinois does allow a personal exemption that can reduce your taxable base slightly, so your actual withholding may land a bit lower than that estimate.
Illinois does not have city-level income taxes imposed by municipalities, so residents outside Chicago pay the same flat state rate as everyone else. The calculator covers your full picture: federal income tax brackets, Social Security and Medicare (FICA), and the 4.95 percent Illinois flat rate, which you can adjust if your employer uses a different withholding allowance. All results are estimates, not tax advice.
Compare take-home pay across pay types and periods, or check another state.
Illinois applies a flat 4.95 percent to all taxable wage income in 2026. The rate is the same whether you earn $25,000 or $250,000.
At 4.95 percent, the estimate is about $3,218 per year, or roughly $268 per month. Your actual withholding depends on exemptions you claim on your IL-W-4.
No. Illinois municipalities do not levy a separate local wage or income tax, so Chicago residents pay only the statewide 4.95 percent plus federal taxes and FICA.