How to Calculate Overtime: Weekly Thresholds and Worked Hours
Understand how overtime hours are calculated across standard workweeks. Learn about 40-hour thresholds, daily vs weekly overtime, and timesheet arithmetic.
Interactive Overtime Calculator
1. What Qualifies as Overtime Hours?
Weekly Workweek Thresholds and General Rules
Under U.S. federal FLSA rules, covered, nonexempt employees generally earn overtime after 40 hours in a workweek. State laws, industry rules, collective agreements, exemptions, and individual employment arrangements may differ.
Crucially, overtime is evaluated on hours actually worked. Paid time off, holiday pay, and unworked sick leave are generally excluded from overtime threshold calculations unless specified by contract.
2. The Mathematical Split: Regular vs Overtime Hours
Formulas for Separating Pay Bands
To separate regular hours from overtime hours, apply this basic conditional formula:
Regular Hours = min(Total Worked Hours, Weekly Threshold)
Overtime Hours = max(0, Total Worked Hours - Weekly Threshold)
Example: An employee logs 47.5 total hours in a week with a 40-hour threshold. Regular hours = min(47.5, 40) = 40.0 hours. Overtime hours = max(0, 47.5 - 40) = 7.5 hours.
3. Daily vs Weekly Overtime Differences
Why Location and Contracts Matter
While federal guidelines focus primarily on the 40-hour weekly cap, certain states (such as California, Nevada, and Alaska) and collective bargaining agreements enforce daily overtime rules (e.g. any time worked over 8 hours in a single calendar day qualifies for overtime).
When using TimeCardWorks, verify whether your employer operates on a strict weekly 40-hour cap or applies daily shift overtime thresholds.
| Rule Type | Standard Threshold | Trigger Mechanism | Typical Rate |
|---|---|---|---|
| Federal Weekly (FLSA) | 40 hours per workweek | Total hours > 40 | 1.5× regular rate |
| Daily Overtime (Specific jurisdictions) | 8 hours per workday | Daily hours > 8 | 1.5× regular rate |
| Double-Time (Specific contracts) | 12 hours in a day / 7th day | Daily hours > 12 | 2.0× regular rate |
4. Tips for Verifying Your Overtime Record
Protecting Accuracy in Manual Time Cards
Keep your own time log: Always record your exact clock-in and clock-out times independently.
Check meal break deductions: Ensure you were not docked 30 or 60 minutes for meal breaks you were required to work through.
Do not average across multiple weeks: Overtime must be evaluated on each workweek independently. Working 50 hours in Week 1 and 30 hours in Week 2 is NOT equal to 80 regular hours.