If you work in petrochemical refining, heavy manufacturing, or continuous operations, chances are you’ve encountered the infamous DuPont schedule. Engineered in the 1950s by the E.I. du Pont de Nemours Company, this 12-hour rotating shift system was built to keep industrial plants running 24/7/365 without missing a beat.
For workers, the DuPont schedule offers a unique trade-off: intensive blocks of day and night work balanced by a legendary 7-consecutive-day vacation built directly into every 4-week cycle. But how does the math actually work, and how does FLSA overtime impact your paycheck? Let’s break down the mechanics.
How the DuPont Schedule Works (The 4-Week Rotation)
The DuPont system relies on 4 distinct crews rotating across 12-hour shifts over a 28-day cycle. Unlike fixed schedules, every crew rotates between day shifts (typically 7:00 AM – 7:00 PM) and night shifts (7:00 PM – 7:00 AM).
In any given 4-week period, a single crew experiences the following pattern:
- Week 1: 4 consecutive NIGHT shifts → 3 days OFF
- Week 2: 3 consecutive DAY shifts → 1 day OFF → 3 consecutive NIGHT shifts
- Week 3: 3 days OFF → 4 consecutive DAY shifts
- Week 4: 7 CONSECUTIVE DAYS OFF (The "DuPont Break")
The Hours & Pay Math: How Overtime Stacks Up
Under the Fair Labor Standards Act (FLSA), non-exempt employees must receive time-and-a-half pay for any hours worked beyond 40 in a standard 7-day workweek. Because 12-hour shifts create uneven weekly hour counts, your gross pay varies depending on where you are in the 28-day cycle.
| Week | Shifts Worked | Total Hours | FLSA Overtime Hours |
|---|---|---|---|
| Week 1 | 4 Night Shifts | 48 hrs | 8 hrs OT |
| Week 2 | 3 Day + 3 Night | 72 hrs* | 32 hrs OT* |
| Week 3 | 4 Day Shifts | 48 hrs | 8 hrs OT |
| Week 4 | 0 Shifts (Rest) | 0 hrs | 0 hrs OT |
*Note: Exact weekly hour splits depend on your employer’s defined FLSA workweek start day and time.
Over a full 4-week cycle, you work a total of 168 hours (averaging 42 hours per week). That means you earn an average of 2 hours of FLSA overtime per week across the full rotation, plus any night shift differentials applicable during Week 1 and Week 2.
Pros & Cons of Working DuPont
Key Advantages
- 7 consecutive days off every 4 weeks.
- Built-in overtime pay on 48h/72h weeks.
- 12 full days off every 28-day cycle.
Key Challenges
- Frequent flips between day and night shifts.
- Brutal 72-hour work weeks (6 shifts in 7 days).
- Sleep disruption during rapid shift flips.
The Bottom Line
The DuPont schedule is a favorite among experienced industrial operators who know how to manage circadian fatigue and love having a 7-day break every month without using PTO. Use our free calculator on the home page to plug in your base wage and calculate your exact gross pay for your next DuPont rotation!