Common Flexible Schedule Overtime Scenarios

Overtime calculation for common flexible work schedules

ScheduleHours/WeekOvertime Under Federal LawNotes
4×10 workweek (Tue–Fri)40 hoursNo OT (exactly 40/week)Mon day off; 10 hrs/day, no daily OT federally
9/80 schedule (alternating 9 and 8-hr days)Alternates 80 hrs over 2 weeks0 or 0 (if exactly 80/14 days)Must check each workweek individually
3×12 shifts (Tue–Thu)36 hoursNo OT4-day workweek with 3 long shifts; common in healthcare
4×12 + 1 partial day50 hours10 OT hoursAny week over 40 triggers OT
Rotating shifts (variable hours)VariesBased on each week’s totalCalculate each workweek independently

The 9/80 Schedule: A Common Overtime Trap

The 9/80 compressed schedule (9 hours/day for 8 days + 1 day off every 2 weeks) averages 40 hours/week. But overtime is calculated per workweek, not per two-week period. If the employer’s workweek is structured correctly, Week 1 = 44 hours (4 × 9-hr days + Friday off midweek) and Week 2 = 36 hours — 4 OT hours in Week 1 plus none in Week 2. The workweek definition determines whether 9/80 creates overtime.

💡The 9/80 Workweek Definition Solution

Employers using 9/80 schedules typically define the workweek to begin at noon on Friday (or some mid-workday time on the alternating day off). This way, the 80-hour period is neatly divided into two 40-hour workweeks, and no overtime accrues. If your employer doesn’t carefully define the workweek for a 9/80 schedule, you may be owed overtime every other week.

Split Shifts and Overtime

A split shift is when an employee’s work day is split into two separate periods (e.g., 7am–11am and 4pm–8pm). All hours worked in a split shift within the same workday count toward overtime. Total hours across all split segments count toward the 40-hour weekly total. There’s no legal requirement for extra pay for the 'gap' between split shift segments beyond regular and overtime rates.

Calculate Your Flexible Schedule Overtime

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