The DuPont schedule is a rotating shift pattern that keeps a site running 24/7 with four crews on 12-hour shifts. Each crew repeats a four-week cycle of night blocks, day blocks and rest days. The average is 42 hours a week, with seven consecutive days off in every cycle.
Operations managers meet it when a plant, control room, ward or venue needs continuous cover. Shift workers meet it when a new rota lands and the phrase “hell week” starts circulating. Both groups want the same thing: an honest picture of what the pattern asks of people, and what it gives back.
This guide sets out the full 28-day rotation with a colour-coded calendar and a free, ungated template. It also covers the pay maths, the UK and US rules, the health evidence, and the alternatives.
How Does the DuPont Schedule Work?
The pattern runs four crews through one four-week sequence, each crew offset by a week. Two crews are always on duty, one on days and one on nights, while the other two rest. Sites also write it as the DuPont shift schedule or the DuPont 12-hour schedule.
For any single crew, the cycle runs like this:
- Week 1: four night shifts, then three days off (48 rostered hours).
- Week 2: three day shifts, one day off, then three night shifts (72 rostered hours).
- Week 3: three days off, then four day shifts (48 rostered hours).
- Week 4: seven consecutive days off (0 hours).
With the crews offset a week apart, every day of the month has exactly one crew on days and one on nights. The full 28-day picture looks like this:
| Crew | Week 1 (days 1–7) | Week 2 (days 8–14) | Week 3 (days 15–21) | Week 4 (days 22–28) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | N | N | N | N | D | D | D | N | N | N | D | D | D | D | ||||||||||||||
| B | D | D | D | N | N | N | D | D | D | D | N | N | N | N | ||||||||||||||
| C | D | D | D | D | N | N | N | N | D | D | D | N | N | N | ||||||||||||||
| D | N | N | N | N | D | D | D | N | N | N | D | D | D | D | ||||||||||||||
The full DuPont schedule: purple marks a 12-hour day shift, dark marks a 12-hour night shift, light marks a rest day, green marks the seven-day break. One row follows one crew; one column shows who covers any given day.
The weekly workload is deliberately uneven. That is the pattern’s defining feature, and the source of most surprises:
| Week | Rostered Hours | Shifts |
|---|---|---|
| Week 1 | 48 | Four night shifts |
| Week 2 | 72 | Three days, one rest day, three nights |
| Week 3 | 48 | Four day shifts |
| Week 4 | 0 | Seven days off |
Sites vary the details, and some begin the cycle on days rather than nights. The start weekday moves too. None of that changes the maths.
Two crews are always on, and two are always off. That symmetry is the whole design.
The Four-Crew Maths Behind 24/7 Cover
A 28-day cycle contains 672 hours of cover to fill: 28 days multiplied by 24 hours. Four crews working 168 hours each fill it exactly. Spread over four weeks, that is where the 42-hour average comes from.
The crew count is not a preference; it is arithmetic. With three crews, each would carry 224 hours per cycle, a 56-hour average that no one sustains. With five, the average drops to about 34 hours and payroll carries idle capacity. Four crews is the minimum that keeps a 12-hour rotation liveable. That is why the DuPont schedule and nearly every rival pattern uses four.
Teams sizing a brand-new operation should calculate staffing needs first and choose a pattern second. A rotation cannot fix an undersized headcount.
Hell Week: The 72-Hour Stretch Nobody Warns You About
Week 2 is where the DuPont schedule earns its reputation. One crew works six 12-hour shifts inside seven days: three days, a single rest day, then three nights. That is 72 rostered hours in one calendar week. In the middle of it, the body must flip from day work to night work over a single rest day.
Crews call it hell week, and the nickname is fair. The design depends on it.
The seven days off in week four are earned in week two.
Rota planners who treat all four weeks as equal get caught here. Cover, standby and workload all need to reflect the fact that one crew per week is running at 72 hours.
Why the DuPont Schedule Keeps Coming Up
The pattern persists because it solves continuous coverage with the fewest crews and the fewest handovers. Two shift changes a day, instead of the three that 8-hour systems need, removes one daily window for information to go missing.
DuPont built the rotation for its US chemical plants in the 1950s. Continuous processes could not be switched off overnight, so the rota could never stop either.
The same logic now runs oil and gas sites, power stations, heavy manufacturing, hospital wards, emergency services, security teams and 24/7 venues. Interest in the DuPont work schedule has comfortably outlived the plants that named it.
Fewer handovers means fewer places for information to die.
There is a second, quieter reason it endures. The full week off is one of the strongest retention levers a 24/7 operation can offer without raising pay. People book trips and family time around it a year in advance.
DuPont Schedule Pros and Cons
The DuPont schedule trades concentrated strain for concentrated recovery. Whether that trade works depends entirely on the workforce being asked to make it.
The case for it is real:
- A full week off every 28 days, without touching annual leave.
- Two handovers a day instead of three, so fewer error windows.
- A fixed rhythm crews can plan around months ahead.
- Days, nights and weekends shared evenly across all four crews.
The case against it concentrates in two places. The first is week 2, covered above. The second is the night work itself. Four consecutive nights open the cycle. The mid-cycle swing from days to nights then disrupts sleep exactly when hours peak.
The safety evidence deserves respect: accident and error risk runs about 28% higher on 12-hour shifts than on 8-hour shifts, with a similar increase for night work over day work (NIOSH, 2015).
Sickness is the operational weak point. When someone calls in sick, the replacement is either mid-rest or already deep into their own hours. Every 24/7 pattern has this problem; the DuPont schedule has it during hell week with the volume turned up.
The pattern concentrates fatigue so that it can concentrate recovery.
Weekend work is unavoidable in any 24/7 rotation. This one bundles its compensation into the week-four break rather than returning alternate weekends, and crews tend to feel either way strongly. Asking them beats assuming.
What Most Teams Get Wrong About the DuPont Schedule
The expensive mistakes are financial and legal rather than human. Nearly all of them come from planning around the 42-hour average instead of the real weeks of 48, 72, 48 and 0.
The 42-hour average is real; the 42-hour week is not.
Overtime and Pay on a DuPont Schedule
US overtime law leaves no room for averaging. The Fair Labor Standards Act requires time and a half after 40 hours in each individual workweek, and averaging across two or more weeks is not permitted (US Department of Labor, 2026).
The cycle makes the gap obvious. Each 48-hour week generates 8 overtime hours. The 72-hour week generates 32. A non-exempt crew member therefore accrues 48 overtime hours every cycle, six times what the 42-hour average suggests.
At $20 an hour, a cycle costs $3,840: 120 straight-time hours at $20 plus 48 overtime hours at $30. Budgeting from the flat average gives $3,360. The pattern costs roughly 14% more than the average implies, before any night premium.
Collective agreements, sector rules and salaried arrangements change the detail. The working principle survives them all: payroll is modelled on the real weeks, never the average.
The overtime is designed into the pattern, and payroll should treat it that way.
Running the DuPont Schedule in the UK and Europe
The 42-hour average sits under the UK’s 48-hour weekly limit, averaged over 17 weeks (GOV.UK, 2026). The pattern is therefore workable without opt-outs. Workers keep the right to 11 hours of rest between working days, which a 12-hour pattern can honour, but never generously.
Night work is the tighter constraint. Night workers’ hours must average no more than 8 in every 24 hours, and employers must offer night workers health assessments (GOV.UK, 2026). Where night work involves special hazards or heavy mental or physical strain, the 8 hours become an absolute cap in any 24 hours.
A 12-hour night shift cannot fit under an 8-hour hard cap.
For those roles, the DuPont schedule is simply unavailable. UK and European teams should test the pattern against the night-work rules before anyone designs a rota around it.
DuPont Schedule vs Pitman, Panama and Other 24/7 Patterns
Every four-crew, 12-hour pattern averages the same 42 hours; the patterns differ in how they bundle the strain. The DuPont schedule buys a full week off with a 72-hour week. Pitman and Panama spread the load more evenly and return every other weekend instead.
| Schedule | How It Works | The Trade-Off |
|---|---|---|
| DuPont | Four crews, 12-hour shifts, 28-day cycle, seven days off per cycle | A 72-hour week and four straight nights pay for the week off |
| Pitman (2-3-2) | 14-day cycle, no more than three shifts in a row, every other weekend off | Gentler weeks, but never a full week off |
| Panama (2-2-3) | 28-day cycle of two on, two off, three on, with every other weekend off | Flat and popular, but the rhythm changes every few days |
| 4-on-4-off | Fixed blocks of four shifts and four rest days | Simple and steady, but repetitive, with half of weekends worked |
| 7-on-7-off | Seven straight 12-hour shifts, then seven days off, on a 14-day cycle | A week off every fortnight, at the price of a punishing working week |
The 7-on-7-off comparison comes up often because both patterns promise a full week off. The DuPont schedule delivers its week off monthly and caps runs at four shifts. 7-on-7-off delivers it fortnightly and demands seven consecutive 12-hour shifts to get there.
The average is the same; the dosage is not.
Modified DuPont, Reverse DuPont and Other Variations
A modified DuPont schedule keeps the four-crew structure but softens week 2. The usual tools are moving the rest day, splitting the night block, or slowing the swing from days to nights. Sites adopt a modification when absence data shows week 2 breaking people. The cost is a less tidy calendar and, sometimes, a shorter week-four break.
The reverse DuPont runs the sequence the other way, with day blocks before night blocks. Some crews find the flip easier in that direction, and the choice is worth testing rather than assuming.
Eight-hour adaptations exist too, though they reintroduce the third daily handover the pattern was designed to remove. What no serious operation runs is a three-crew version: the arithmetic lands on 56-hour weeks.
What Experienced Teams Do Differently
Teams that run the DuPont schedule well treat go-live as the halfway point of the project. The pattern is unforgiving of guesswork, so they replace guesswork with checks.
They consult crews before committing, because a rotation imposed on people fails faster than one agreed with them. They trial the pattern for at least one full 28-day cycle and review it against the 17-week averaging window. Before anyone works a night, they run a fatigue risk assessment.
The HSE’s Managing Shift Work guidance, HSG256, sets out the approach: assess, act, check and review (HSE, 2006).
Patterns imposed on crews fail; patterns agreed with crews hold.
Start decisions matter more than they look. The start weekday decides where every seven-day break lands, and whether it ever contains a full weekend. Deliberate teams hold standby cover for week 2, where one sickness hurts most. For the first 90 days, they track four numbers: absence, incidents, overtime spend and turnover.
The last habit is the simplest. The live rota sits where every crew member can see it, with changes reaching people the moment they happen.
A printed four-week rotation is out of date by the second swap. A structured shift planning guide helps put that discipline in place.
Free DuPont Schedule Template and 2026 Calendar
The free template holds the full four-crew rotation and a dated 2026 calendar. There is no email gate; the file is a straight download.
- Tab one carries the master 28-day pattern for crews A to D, colour-coded to match the calendar above, with crew names editable.
- Tab two is the DuPont schedule calendar for 2026: a single start-date cell re-dates the whole pattern for any go-live day, in any year.
- Tab three explains how to adapt the file, including the modified variant.
A template is a starting grid, not a finished rota.
It will not manage swaps, sickness or availability, and it does not know the law. In about two minutes, though, this DuPont schedule template shows exactly what the rota asks of each crew.
That is the right first step.
Free download. No email required.
Four-crew master rotation · dated 2026 calendar that re-dates for any year · built-in cover checks
When the DuPont Schedule Fits, and When It Does Not
Three things make the pattern fit: flat round-the-clock demand, four stable permanent crews, and night work that clears the legal limits. Plants, utilities, control rooms and year-round secure sites tick all three.
It does not fit work that changes shape. A festival build runs day and night for a fortnight and then stops. Venue staffing swells for a fixture and empties by morning. Hospitality peaks at weekends, which a fixed rotation treats like any other day. Demand-led shift patterns for event and project teams beat any fixed template there.
Fixed rotations assume the work never changes shape.
Whichever pattern a team picks, the spreadsheet layer is where it breaks in practice. Swaps drift into group chats, and the printed rota stops matching reality. Rest limits live in someone’s head, and a 72-hour week surprises payroll at the worst moment.
Liveforce is the workforce management platform event-led businesses use to run scheduling without that layer. Its staff scheduling software replaces the master spreadsheet when teams span multiple sites, projects and clients. One workforce database replaces the scattered lists.
Availability, qualifications and rest limits become visible at the moment shifts are assigned, and timesheets tied to actual shifts replace the end-of-month chase on uneven weeks. It is built for venues, festival and hospitality suppliers, and agencies running large temporary teams.
Their demand is event-led rather than flat, and the platform is shaped around that. Crews see their shifts and confirm availability through the app.
The Decision, Not the Definition
A pattern this old survives on fit, not fashion. Four questions settle whether the DuPont schedule deserves a trial:
- Is demand genuinely flat, 24 hours a day, seven days a week?
- Can the operation hold four stable, permanent crews?
- Can payroll absorb real weeks of 48 and 72 hours?
- Has week 2 been risk-assessed before go-live?
Four yeses make the DuPont schedule a strong candidate, and the free template above turns it into a rota by the end of the day. A single no points to a flatter rotation, or to demand-led scheduling instead.
See how Liveforce works for your team.
