How to Calculate Overtime Under the FLSA 40-Hour Workweek Rule
Step-by-step breakdown of 1.5x regular rate computations, how nondiscretionary bonuses alter the regular rate, and state-specific daily overtime standards.
1. The Federal 40-Hour Workweek Standard
Enacted under the Fair Labor Standards Act (FLSA), the federal 40-hour threshold ensures that hourly employees are protected against excessive working hours without adequate compensation.
Under federal law, a workweek is an established, regularly recurring period of 168 hours—seven consecutive 24-hour days. It does not need to coincide with the calendar week; it may begin on any day and at any hour established by management (e.g., Monday at 12:01 AM, or Wednesday at 8:00 AM).
•The Prohibition Against Bi-Weekly Averaging
A common payroll violation occurs when employers pay employees bi-weekly (every two weeks) and average the hours across the 14-day pay period. For instance, if an employee logs 50 hours in Week 1 and 30 hours in Week 2 (80 total hours), the employer must compensate 10 hours of overtime for Week 1. Averaging the two weeks as two 40-hour weeks without overtime is illegal under federal law.
2. Step-by-Step Overtime Pay Formula (1.5x)
When an employee is compensated at a flat hourly wage, calculating overtime pay involves three simple mathematical steps:
Practical Scenario: 46.50 Hours at $22.00/Hour
3. The Regular Rate of Pay & Nondiscretionary Bonuses
Under federal law (29 CFR § 778.109), the "regular rate of pay" is not simply the base contract hourly rate. It must reflect all earnings divided by total hours worked during the workweek.
✓ Must Include in Regular Rate
- Night shift differentials & hazard pay
- Attendance bonuses & safety bonuses
- Production and quality incentives
- Commissions and performance bonuses
✗ Excluded Under 29 U.S.C. § 207(e)
- Discretionary gifts & holiday bonuses
- Reimbursement for legitimate business travel
- Discretionary employee referral bounties
- Paid time off (PTO, sick leave, jury duty)
When an employee receives a nondiscretionary bonus during an overtime workweek, the true regular rate increases, and the employer must provide an additional 0.5x "true-up" payment for every overtime hour worked.
4. Federal vs. State Daily Overtime Laws
Federal law places no restriction on the number of hours an employee may work in a single workday without triggering overtime, provided weekly hours do not exceed 40.00. However, four states mandate daily overtime thresholds:
Whenever state employment standards are more favorable to the worker than federal law, the state standard governs payroll compliance.
Calculate 40-Hour & Daily Overtime in Seconds
Accurately compute regular hours, 1.5x FLSA overtime wages, and daily overtime splits with our verified, free time card calculator.
Regulatory & Legal Disclaimer: ShiftTimeCard.com provides wage calculation algorithms, labor standard references, and timesheet tools for informational and administrative convenience. This guide does not constitute formal legal counsel, tax advice, or binding labor audits. Because state labor regulations (such as California, Nevada, Alaska, and New York) frequently impose stricter requirements than federal FLSA baselines, consult with a licensed employment attorney or certified payroll professional regarding unique organizational policies.