Calculate Illinois overtime pay with FLSA rules, 4.95% flat state tax, federal withholding, FICA deductions, and annualized income projections.
Illinois follows the federal FLSA overtime rules requiring 1.5× pay for hours beyond 40 per workweek. The state levies a flat income tax rate of 4.95% on all income, making overtime calculations straightforward — every dollar of overtime is taxed at the same rate. Some Illinois workers must also account for additional local taxes in certain municipalities.
Illinois's One Day Rest in Seven Act also provides additional protections, requiring employers to provide at least 24 consecutive hours of rest every calendar week and meal breaks for shifts of 7.5+ hours. While this doesn't directly affect overtime rates, it impacts scheduling and overtime planning. That means the calculator is useful both for wage math and for thinking through whether extra hours are worth the schedule impact.
This calculator computes your complete Illinois paycheck including overtime, the 4.95% flat state tax, federal withholding, and FICA. It provides comparison tables for different overtime levels and annualized income projections to help you plan your finances. Check the example with realistic values before reporting.
Illinois's flat 4.95% tax makes overtime calculations clean but the combined federal, state, and FICA deductions still take a significant bite. This calculator shows exactly what you keep from every overtime hour and projects your annual earnings. It also helps you compare whether extra hours are worth the added tax burden and schedule strain.
Regular Pay = min(hours, 40) × Rate Overtime Pay = max(hours − 40, 0) × Rate × 1.5 Illinois State Tax = Gross Pay × 4.95% (flat rate) Net Pay = Gross − Federal Tax − IL Tax − FICA
Result: $857 net pay
At $24/hr for 48 hours: $960 regular + $288 OT = $1,248 gross. IL tax $61.78, federal $149.76, FICA $95.47. Net pay is approximately $940.99.
Overtime raises gross pay, but federal withholding, FICA, and Illinois's flat state tax all still reduce the amount that reaches your bank account. The calculator shows gross and net side by side so you can decide whether extra shifts are worth the take-home amount, not just the headline hourly rate.
Illinois overtime is not the only labor issue that affects working hours. Rest and meal break rules can change how shifts are scheduled, especially for long or overnight work. Use the calculator as one input when deciding whether more hours fit your pay and rest schedule.
A few overtime hours each week can add up quickly across a year, but the net gain depends on the pay rate and tax mix. The annualized view helps you compare steady overtime with occasional double-shift spikes before you commit to more work.
Illinois has a flat income tax rate of 4.95% on all taxable income. This makes paycheck calculations simpler compared to states with progressive brackets.
No. Illinois follows the federal FLSA standard of weekly overtime only — time and a half for hours exceeding 40 per workweek.
Some Illinois municipalities may levy additional local taxes. Chicago does not have a city income tax, but some Cook County taxes may apply.
Illinois minimum wage is $14.00/hr as of 2024, with scheduled increases. Overtime at minimum wage would be $21.00/hr.
Since Illinois uses a flat rate, every dollar of overtime is taxed at the same 4.95% — there are no bracket jumps that increase your marginal state tax rate.
Illinois labor law mirrors federal FLSA for overtime. Non-exempt employees must receive 1.5× their regular rate for hours beyond 40 per week.