Illinois Overtime Law: Your Guide to Rates, Statutes, Calculations, and More (2025)

This guide has everything you need to know about Illinois overtime laws for 2025, including rates, thresholds, statutes, and much more.

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FAQs: Illinois Overtime Law
Is overtime over 8 hours a day or 40 hours a week in Illinois?

Illinois does not have a daily overtime law, meaning employees do not automatically qualify for overtime after working more than 8 hours in a day. Instead, overtime pay is required for non-exempt employees who work more than 40 hours in a single workweek. 

Overtime must be paid at 1.5 times the employee’s regular hourly rate for all hours beyond 40 in a week. Some employers may voluntarily offer daily overtime pay, but it is not required by Illinois overtime law.

How much notice is required for mandatory overtime in Illinois?

Illinois does not have a law requiring employers to give advance notice before assigning mandatory overtime. Employers generally have the right to schedule employees for overtime hours as needed. 

However, employees covered by union contracts or company policies may have different notice requirements. The only restriction is the One Day Rest in Seven Act (ODRISA), which requires at least one 24-hour rest period per week unless an exception applies.

Who is exempt from overtime pay in Illinois?

Employees classified as exempt under Illinois overtime law are not entitled to overtime pay. Common exemptions include:

  • Executive, administrative, and professional employees earning at least $684 per week
  • Outside sales employees
  • Commissioned retail or service employees (earning more than 1.5 times minimum wage, with more than 50% of earnings from commissions)
  • Certain agricultural workers
  • Car salespeople and mechanics at dealerships
  • Select radio/TV employees in cities under 100,000 residents

Employers should carefully classify workers, as misclassification can lead to penalties.

Can you refuse mandatory overtime in Illinois?

In most cases, no. Illinois law allows employers to require overtime unless a contract, union agreement, or specific labor law states otherwise. However, employees can legally refuse overtime if it violates the One Day Rest in Seven Act (ODRISA), which mandates at least one 24-hour rest period per workweek. 

In addition, some health and safety laws may limit excessive overtime for certain industries, such as healthcare and transportation. Employees who refuse overtime without legal protection may face disciplinary action, including termination.

How is overtime calculated for salaried employees in Illinois?

Salaried employees must receive overtime unless they meet exemption criteria. To calculate overtime for a non-exempt salaried worker, determine their regular hourly rate:

  • Weekly salary ÷ 40 hours = regular hourly rate
  • Regular hourly rate × 1.5 = overtime rate
  • Overtime rate × overtime hours = overtime pay

For example, a salaried employee earning $1,000 per week working 45 hours would have a regular hourly rate of $25 and an overtime rate of $37.50. For 5 overtime hours, the additional pay would be $187.50.

Do tipped employees get overtime pay in Illinois?

Yes. Tipped employees must receive overtime pay, but their overtime rate is based on the full Illinois minimum wage—not just their cash wage. 

Employers can take a tip credit, but for overtime, the base wage is minimum wage × 1.5, with the tip credit subtracted. 

For example, if the minimum wage is $14 per hour, overtime pay is calculated as:

  • $14 × 1.5 = $21 (overtime wage before tip credit)
  • $21 – $6 tip credit = $15 overtime rate per hour
What happens if an employer doesn’t pay overtime in Illinois?

Employers who fail to pay required overtime may face penalties under Illinois overtime law, including:

  • 5% monthly interest on unpaid wages
  • 20% additional penalties for willful violations
  • $1,500 fines for specific violations
  • 1% daily penalty for delayed payments

Employees can file a wage claim with the Illinois Department of Labor (IDOL) or pursue legal action for back pay and damages (IDOL Wage Claim).

Does Illinois require double time pay?

No. Illinois does not require double time pay, even for excessive hours worked in a day or week. However, certain union contracts or company policies may offer double time for holidays, weekends, or long shifts. 

Employers are only required to pay 1.5x the regular rate for overtime hours beyond 40 per week under Illinois law.

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