Illinois Overtime Law: Daily Overtime, the 40-Hour Rule, and Exemptions

In Illinois, overtime is owed at one and one-half times your regular rate of pay for every hour you work over 40 in a single workweek — and that is the only overtime trigger the state recognizes. Unlike California, Illinois does not require daily overtime: working 10, 12, or even 14 hours in one day does not, by itself, entitle you to overtime as long as your total for the week stays at or below 40 hours. The 40-hour weekly threshold comes from the Illinois Minimum Wage Law (IMWL), 820 ILCS 105, which mirrors the federal Fair Labor Standards Act (FLSA) on this point. So in practice, an Illinois worker who puts in four 11-hour days (44 hours) is owed 4 hours of overtime, while a worker who logs three 13-hour days (39 hours) is owed none.

How overtime works in Illinois

Overtime in Illinois is measured by the workweek, a fixed and regularly recurring period of 168 hours — seven consecutive 24-hour days. Your employer can set the workweek to start on any day and at any hour, but once set it cannot be shifted around to dodge overtime. Hours are not averaged across two or more weeks: if you work 30 hours one week and 50 the next, you are owed 10 hours of overtime for the second week, even though your two-week average is exactly 40.

The overtime rate is 1.5 times your "regular rate", not simply 1.5 times your base hourly wage. The regular rate must include most forms of compensation — nondiscretionary bonuses, shift differentials, and commissions — so the true overtime rate is often higher than the posted hourly figure. Paid time that you did not actually work, such as vacation, holidays, or sick leave, does not count toward the 40-hour threshold; only hours actually worked count.

For context, the federal FLSA sets the national floor: a $7.25 federal minimum wage and the same weekly-40 overtime rule. Illinois sits well above the federal wage floor. As of 2026, the Illinois minimum wage is $15.00 per hour for most adult workers, having reached that level on January 1, 2025 under a phased schedule. Because minimum-wage figures and tipped-wage and youth-wage rates can change, confirm the current number with the Illinois Department of Labor before relying on it. Chicago and Cook County set their own higher local minimum wages, which can raise the regular rate (and therefore the overtime rate) for workers in those jurisdictions.

Does Illinois require daily overtime?

No. This is the single most common misconception about Illinois overtime. Some states — most notably California — require time-and-a-half after 8 hours in a day and double time after 12. Illinois has no daily overtime requirement at all. Your overtime is calculated strictly on the weekly total of hours over 40.

Illinois does, however, have a related rest protection that workers sometimes confuse with overtime: the One Day Rest in Seven Act (ODRSA), 820 ILCS 140. The ODRSA generally entitles employees to at least 24 consecutive hours of rest in every calendar week and to a meal period of at least 20 minutes for shifts of 7.5 continuous hours or longer. The ODRSA is about rest and meal breaks, not pay multipliers — violating it does not create an overtime obligation, but it can expose an employer to separate penalties.

Who is exempt from Illinois overtime

The IMWL borrows the FLSA's exemption framework, so the categories will look familiar. Common exempt classifications include:

• Executive, administrative, and professional (EAP) employees who are paid on a salary basis above the applicable threshold and whose primary duties meet the legal tests for that category. A job title alone never makes someone exempt — the actual duties control.
• Outside salespeople who regularly work away from the employer's place of business.
• Certain computer professionals meeting the duties and pay tests.
• Some agricultural workers and specific narrow categories listed in 820 ILCS 105/4a.

Being paid a salary does not by itself make you exempt. Many salaried workers are still entitled to overtime because their duties do not meet the exemption tests or their salary falls below the required threshold. Misclassification — calling a non-exempt worker "salaried exempt" or labeling an employee an "independent contractor" — is one of the most frequent sources of unpaid overtime. If your real day-to-day work is routine, non-managerial, or closely supervised, you may be owed overtime regardless of how your paycheck is structured. Because the federal salary thresholds for the EAP exemptions have been the subject of repeated rulemaking and litigation, verify the current dollar threshold rather than assuming.

How to recover unpaid overtime in Illinois

If you believe you are owed overtime, you have two main paths, and you can pursue them together or separately:

• File a wage claim with the Illinois Department of Labor (IDOL). IDOL is the state agency that enforces the Illinois Minimum Wage Law and investigates unpaid-wage and overtime complaints. You can file a complaint with its Fair Labor Standards Division; the agency can investigate and order the employer to pay what is owed.
• File a lawsuit. The IMWL allows an employee to sue directly for unpaid overtime. A key feature of the IMWL is its three-year statute of limitations — you generally must bring a claim within three years of when the wages were earned. Each underpaid paycheck can start its own clock, so do not wait; delay can permanently bar recovery of older amounts.

Illinois law is favorable to workers who win. Under the IMWL, a prevailing employee can recover the unpaid overtime plus statutory damages and interest, and the law has been strengthened over time to increase the penalties an employer owes for underpayment. You may also have an overlapping federal FLSA claim, which carries its own two-year limitations period (three years for willful violations) and the possibility of liquidated (double) damages. An employment attorney can advise which combination of claims maximizes your recovery.

Two practical protections matter here. First, retaliation is illegal: an employer may not fire, demote, or otherwise punish you for filing a wage complaint or asserting your overtime rights, and Illinois provides remedies if it does. Second, documentation wins cases. Keep your own record of hours worked, pay stubs, schedules, and any communications about your classification or hours. Employers are legally required to keep accurate time and pay records, and gaps in their records often work in the employee's favor.

Where to verify

The authoritative Illinois source is the Illinois Department of Labor (IDOL), which publishes the current minimum wage, overtime rules, exemption details, and complaint-filing instructions. The governing statutes are the Illinois Minimum Wage Law (820 ILCS 105) and, for rest and meal breaks, the One Day Rest in Seven Act (820 ILCS 140). For the federal baseline, the U.S. Department of Labor's Wage and Hour Division administers the FLSA. Because wage figures and exemption thresholds are updated periodically, always confirm the current numbers with IDOL or the U.S. DOL before acting.

Official Illinois Sources

This page is based on Illinois employment law. Rules and figures change — verify the current details directly with the official Illinois sources below. This is general legal information, not legal advice.

• Illinois Department of Labor — official Illinois agency.
• File a Wage Claim (Unpaid Wages) - Illinois Department of Labor
• Illinois Wage Payment and Collection Act (820 ILCS 115)

Federal law and local ordinances may also apply. Federal laws like the Fair Labor Standards Act set a national floor, and your city or county may add protections (such as a higher local minimum wage or paid sick leave). Check both alongside Illinois state law.