Illinois Overtime Calculator

Estimate regular and overtime pay under Illinois law, which requires time-and-a-half for hours worked beyond 40 in a single workweek. Enter your hourly rate and hours to see your weekly and projected annual gross pay.

Quick Facts

Overtime rule
1.5x pay after 40 hours/week
The Illinois Minimum Wage Law (820 ILCS 105/4a) follows the federal FLSA standard: overtime triggers weekly, not daily.
No daily overtime
Only the 40-hour weekly total counts
A single long shift does not by itself create overtime if the weekly total stays at or under 40 hours.
Exempt roles
Executive, administrative, professional, outside sales, some computer roles
This calculator assumes a non-exempt hourly employee; exempt salaried workers are not covered by the 40-hour rule.

Your Results

Calculated
Regular pay
-
First 40 hours at your hourly rate
Overtime pay
-
Hours over 40 at the OT multiplier
Total weekly pay
-
Regular pay plus overtime pay
Estimated annual pay
-
Weekly pay x weeks entered

Ready

Enter your hourly rate and hours worked, then press Calculate.

How Illinois overtime pay is calculated

Illinois follows the federal Fair Labor Standards Act (FLSA) standard, codified in the Illinois Minimum Wage Law (820 ILCS 105/4a): non-exempt employees must be paid 1.5 times their regular hourly rate for every hour worked beyond 40 in a single workweek. Overtime is calculated on a weekly basis only - Illinois has no daily overtime rule, so a single long shift does not by itself create overtime pay if the weekly total stays at or under 40 hours.

The formula

Regular pay = min(hours worked, 40) x hourly rate. Overtime pay = max(0, hours worked − 40) x hourly rate x overtime multiplier (1.5 by default). Total gross pay for the week is the sum of the two. This calculator also multiplies the weekly total by the number of weeks you enter to project an annual figure, assuming the same hours pattern repeats every week.

Worked example

Take an hourly rate of $18 and 45 hours worked in a week. The first 40 hours pay the regular rate: 40 × $18 = $720. The remaining 5 hours are overtime: 5 × $18 × 1.5 = $135. Total gross pay for the week is $855. Projected over 52 weeks at the same pattern, that works out to roughly $44,460 per year - though real paychecks vary with holidays, sick time, and the actual hours worked each week.

What Illinois law does and does not require

  • Overtime is 1.5x the regular rate for hours over 40 in a workweek - Illinois does not set a higher state overtime multiplier
  • Illinois does not require double-time pay for any hours worked, including weekends or holidays, unless an employer's policy or a union contract promises it
  • Non-discretionary bonuses and commissions generally must be folded into the "regular rate" before the 1.5x multiplier is applied; this calculator does not model that adjustment
  • Local ordinances (for example, Chicago and Cook County) can set a higher minimum wage, but the 1.5x overtime multiplier itself comes from state and federal law, not the local ordinance

Frequently Asked Questions

How is overtime calculated in Illinois?
Illinois follows the federal Fair Labor Standards Act standard under the Illinois Minimum Wage Law (820 ILCS 105/4a): non-exempt employees earn 1.5 times their regular hourly rate for every hour worked beyond 40 in a single workweek. There is no daily overtime threshold in Illinois - only the weekly 40-hour trigger matters, regardless of how the hours are spread across days.
Does Illinois require double-time pay?
No. Illinois law does not require double-time pay for any hours, including weekends or holidays, unless an employer's own policy or a union contract promises it. This calculator lets you switch the multiplier to 2x only to model such a voluntary policy - the legal minimum in Illinois is 1.5x for hours over 40 in a week.
Who is exempt from Illinois overtime rules?
Employees who meet the FLSA's executive, administrative, professional, outside sales, or certain computer-employee exemptions are generally not entitled to overtime. This calculator assumes a non-exempt, hourly employee; salaried exempt workers are not covered by the 40-hour overtime rule modeled here.
How is the annual estimate calculated?
The annual figure multiplies your total weekly gross pay (regular pay plus overtime pay) by the number of weeks you enter, assuming the same hours pattern repeats every week. It is a projection based on your inputs, not a guarantee - actual paychecks vary with real hours, holidays, and unpaid time off.

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