4-3-3-4 Work Schedule (12-Hour)
The 4-3-3-4 work schedule is the DuPont 12-hour rotation. See the week-by-week grid, coverage math, overtime, pros and cons, and a free template.
The 4-3-3-4 Work Schedule (12-Hour)
How the DuPont 12-hour rotation works, the coverage math, and a free template
The 4-3-3-4 work schedule is one of those terms that means two completely different things depending on who is searching. If you are a shift-work employer, it is a well-known 12-hour rotation. If you are a divorced parent, it is a custody arrangement. This guide is firmly about the first one: the 4-3-3-4 work schedule, better known as the DuPont 12-hour shift, used by businesses that need round-the-clock coverage. If you landed here looking for the custody version, this is not that, and I flag the difference clearly below so nobody wastes their time.
The 4-3-3-4 work schedule is the pattern of 12-hour shift and rest blocks inside the DuPont rotating shift schedule, using four crews to cover an operation 24 hours a day across a repeating 28-day cycle. This guide is written for the employer, operations manager, or scheduler evaluating it, and it covers the week-by-week rotation, the coverage and hours math, a worked overtime example, honest pros and cons, the industries that use it, whether it can work for a small team, how it compares to other rotations, and a free template.
Below you will find a clear definition, the work-versus-custody disambiguation, a week-by-week rotation grid, the coverage math, a concrete overtime example including California's daily-overtime rules, a balanced pros-and-cons view, the industries it fits, an honest small-team reality check, a comparison to sibling rotations, and a downloadable-style template. I build shift scheduling and time tracking into FirstHR, because a rotation with weekly hours swinging from zero to 72 only works when hours and overtime are tracked accurately per workweek. This is general information, not legal advice; confirm wage-and-hour specifics for your state.
What the 4-3-3-4 Work Schedule Is
The 4-3-3-4 work schedule is the sequence of 12-hour work and rest blocks that a crew moves through in the DuPont rotating shift schedule. It is not a separate schedule from DuPont; it is the shorthand for how DuPont's shifts are arranged.
The reason the term travels alongside DuPont is that DuPont is the schedule and 4-3-3-4 is the pattern that defines it. When shift-work sources talk about a 4-3-3-4 rotation, they mean the DuPont 12-hour schedule, which is why this guide treats them as one topic. It is one of many 12-hour shift schedules businesses use for continuous coverage, and it sits within the broader family of rotating schedules.
Work Schedule, Not a Custody Arrangement
Before going further, it is worth clearing up a genuine source of confusion, because the same numbers are used for two unrelated things. Getting this straight avoids a lot of wasted searching.
With that cleared up, everything below is about the workplace schedule. The reason the distinction matters for employers is simply search: a lot of general information about "4-3-3-4" online is about custody, not shift work, so when you are researching the schedule for your business, make sure the source is talking about 12-hour shifts and crews, not parenting time. From here on, every reference is to the DuPont work rotation.
How the Rotation Works
The clearest way to understand the 4-3-3-4 rotation is to see one crew's full 28-day cycle laid out week by week. The pattern looks complex at first but is simply blocks of day shifts, night shifts, and rest, arranged to keep coverage continuous.
Each crew works through the same sequence: four consecutive night shifts, then three days off, three day shifts, one day off, three night shifts, three days off, four day shifts, and finally a full seven days off before the cycle repeats. The grid below shows one crew across the four weeks. The other three crews run the identical pattern, each offset by a week, so that at any moment two crews are working (one on days, one on nights) and two are off.
The offset is the clever part. Because each of the four crews starts the cycle a week apart, the pattern automatically guarantees that days and nights are always covered while giving every crew the same rotation and the same long break in turn. This is what lets just four crews deliver true 24/7 coverage, and it ties directly into good shift management. The exact day-and-night arrangement can be varied (patterns like 3-4-4-3 rearrange the same blocks), but the four-crew, 28-day, 12-hour structure is the constant.
Coverage and Hours Math
The numbers behind the 4-3-3-4 schedule explain both its efficiency and its main drawback. Here is the math at a glance before we work through the overtime implications.
The logic is straightforward. A week has 168 hours to cover (7 days times 24 hours), and dividing that among four crews gives each crew an average of 42 hours per week. Across the 28-day cycle, a crew works 168 hours total: two weeks of about 48 hours, one heavy week of 72 hours (six 12-hour shifts in seven days, widely called hell week), and one week entirely off. That produces roughly 15 days off per cycle, including the seven-day break. The 42-hour average is only slightly above a standard 40-hour week, but the uneven distribution, especially that 72-hour week, is where the real cost and fatigue live, which is why the staffing and coverage side connects closely to staffing and scheduling.
Overtime and Labor Cost
The overtime cost of the 4-3-3-4 schedule is easy to underestimate if you only look at the 42-hour average, because overtime is not calculated on the cycle average. Understanding this before you adopt the schedule is essential to budgeting it correctly.
Under the federal FLSA, overtime is owed for hours over 40 in each individual workweek, and you generally cannot average across weeks. So even though a crew averages 42 hours, the actual overtime depends on how each workweek falls: the 72-hour hell week alone generates a large block of overtime (roughly 32 overtime hours in that week), while the zero-hour week generates none.
Across a year, this structural overtime is predictable and budgetable, but only if you model it per workweek rather than assuming the average. Correctly classifying who is exempt or non-exempt under the Fair Labor Standards Act is the first step, since only non-exempt employees earn this overtime.
The practical takeaway is to build a worked overtime model for each state where you have staff before adopting the 4-3-3-4 schedule, using the actual workweek hours rather than the tidy 42-hour average. The schedule can absolutely be worth it for the coverage and recruiting benefits, but only with an honest labor-cost picture, since the uneven weeks and any state daily-overtime rules can add meaningfully to the base wage bill. Keeping accurate records is itself an FLSA requirement, and accurate time and attendance tracking per workweek is what makes that cost visible and correct.
Pros and Cons
Whether the 4-3-3-4 schedule fits comes down to weighing genuine benefits against genuine costs, for both the business and the workforce. Here is a balanced view of each side.
| Pros | Cons |
|---|---|
| Full seven-day break every cycle, a strong recruiting draw | One heavy 72-hour hell week per cycle |
| Efficient 24/7 coverage with only four crews | Long 12-hour shifts raise fatigue and injury risk |
| Predictable pattern known months in advance | Blocks of consecutive night shifts are physically taxing |
| Roughly 15 days off per 28-day cycle | Uneven weeks complicate overtime and payroll |
| Only two shift handoffs per day | Absence coverage is hard when crews are on the seven-day break |
For employers, the coverage efficiency and the recruiting appeal of the built-in week off are the main draws. For employees, that week off is often the deciding factor. But the cons are real and should not be glossed over: the 72-hour week is demanding, consecutive night shifts take a physical toll, the uneven weekly hours make payroll and overtime more complex, and covering a no-show is genuinely hard when part of your workforce is midway through a seven-day break. Long shifts and night work carry documented fatigue and safety risks, so none of this rules the schedule out; it means the decision should be deliberate and paired with fatigue management and a real plan for absence coverage.
Industries That Use the 4-3-3-4 Schedule
The 4-3-3-4 schedule concentrates in continuous operations that cannot stop and can support four full crews. Knowing where it is common helps you judge whether it fits your setting.
Its original home is continuous-process manufacturing (chemical, industrial, and production plants), which is where the DuPont company developed it. Beyond that, it is widely used in healthcare and nursing, public safety and law enforcement, security and surveillance, emergency services, utilities and power generation, and logistics and transportation. The common thread is a genuine need for round-the-clock coverage combined with enough headcount to staff four crews. Notably, small-business framing is largely absent from how this schedule is usually discussed, because the four-crew requirement pushes it toward larger operations, which is exactly the reality check the next section addresses.
Is the 4-3-3-4 Schedule Realistic for a Small Team?
This is the question most guides skip, and it matters for any small business considering the schedule. The honest answer is that the 4-3-3-4 schedule has a real minimum size, and below it the pattern does not work cleanly.
Because true 24/7 coverage requires four crews, and each crew needs enough people to cover its position even when someone is sick or on leave, the practical floor is around 12 or more people for a single-position operation, and more if you cover multiple roles around the clock. A business with, say, six employees simply cannot run a clean four-crew DuPont rotation; there are not enough people to form four crews and still handle absences. For genuinely small teams needing some after-hours coverage, a lighter approach usually fits better: a simpler rotation with fewer crews, an on-call arrangement, or a partial-coverage schedule rather than full 24/7. The 4-3-3-4 schedule earns its place when you have the headcount and a true round-the-clock need, not as a default for every small operation, and it is worth comparing against the full range of work schedule types before committing.
Compared to Other Rotations
The 4-3-3-4 (DuPont) schedule is one of several four-crew 12-hour rotations, and it helps to see how it differs from the main alternatives before deciding. Each balances the work and rest blocks differently.
| Rotation | Cycle | Key difference |
|---|---|---|
| 4-3-3-4 (DuPont) | 28 days | Built-in 7-day break, but one 72-hour hell week |
| Panama (2-2-3) | 14 days | No more than 3 consecutive shifts, every other weekend off |
| Pitman | 14 days | Similar to Panama; caps consecutive shifts, no hell week |
| 7 on 7 off | 14 days | Seven straight shifts, then a full week off |
| Continental | 28 days | Uses 8-hour shifts instead of 12, gentler days |
The core trade-off is concentration versus spread. The 4-3-3-4 schedule concentrates work to deliver its signature seven-day break, at the cost of the 72-hour week, while the Panama and 2-2-3 patterns spread work into shorter runs with no hell week but no full week off either.
The 7 on 7 off schedule sits between them with a week-on/week-off rhythm. If you want to compare all four-crew options in one place, see the guide to the rotating 4-team 24/7 shift pattern. The right choice depends on whether your workforce prefers a long occasional break or steadier, shorter runs.
Free 4-3-3-4 Schedule Template
Here is a template for setting up a 4-3-3-4 (DuPont) rotation. Fill in your four crews and shift times, then use it as the repeating base for the 28-day cycle. Pair it with a relief plan and a per-workweek overtime check.
Frequently Asked Questions
What is a 4-3-3-4 work schedule?
The 4-3-3-4 work schedule is the work-and-rest pattern inside the DuPont 12-hour rotating shift. Over a 28-day cycle, a crew works blocks of 12-hour day and night shifts separated by rest days, following the sequence of four night shifts, three days off, three day shifts, one day off, three night shifts, three days off, four day shifts, and then a full seven days off. It uses four crews to provide continuous 24/7 coverage, averages about 42 hours per week, and is common in manufacturing, healthcare, public safety, and other round-the-clock operations. The name refers to the shift work blocks, not a child-custody arrangement.
Is the 4-3-3-4 schedule the same as the DuPont schedule?
Yes, in the shift-work context they are the same thing. 4-3-3-4 describes the specific pattern of work blocks within the DuPont 12-hour rotating schedule, which is why most guides use the two terms together. The DuPont schedule is the full four-crew, 28-day, 12-hour rotation, and 4-3-3-4 is shorthand for the sequence of shift blocks a crew moves through in that cycle. So if you are researching a 4-3-3-4 work schedule for a business, you are researching the DuPont schedule. Note that outside of work, 4-3-3-4 can also refer to a child-custody rotation, which is unrelated.
How many hours is a 4-3-3-4 (DuPont) schedule?
Across the full 28-day cycle, a crew works 168 hours, which averages to about 42 hours per week. But the weeks are uneven: two weeks are around 48 hours, one week is a heavy 72 hours (six 12-hour shifts in seven days, often called hell week), and the fourth week is entirely off. So while the average is only slightly above a standard 40-hour week, individual weeks swing from zero to 72 hours. This uneven distribution is important for overtime, because under federal law overtime is calculated per workweek, not on the cycle average.
How many days off do you get on a 4-3-3-4 schedule?
A crew gets about 15 days off in every 28-day cycle, including a full seven consecutive days off in the fourth week. That is considerably more total time off than a standard Monday-to-Friday schedule, which gives roughly 8 days off over the same four weeks. The built-in week off every cycle, taken without using vacation time, is the schedule's most popular feature and a real recruiting advantage. The trade-off is that the working weeks are demanding, including the 72-hour week and blocks of consecutive night shifts, so some of the off time goes to recovery.
Is a 4-3-3-4 (DuPont) schedule good?
It depends on the operation and the workforce. For employers needing continuous 24/7 coverage, it is efficient, needing only four crews, and predictable, since the pattern repeats indefinitely. For employees, the built-in seven-day break is a strong draw. The downsides are real: the 72-hour hell week is demanding, consecutive 12-hour night shifts are physically taxing, and fatigue and injury risk rise with long shifts. Whether it is good depends on the work, the fatigue management in place, and whether the workforce values the long break enough to accept the heavy weeks. It suits stable, continuous operations more than variable or small ones.
What is the difference between 4-3-3-4 and 3-4-4-3?
Both are variations of the DuPont-style 12-hour rotation, differing only in how the day and night blocks are arranged within the cycle. 4-3-3-4 and 3-4-4-3 (along with others like 5-2-5-2 and 6-3-6-3) rearrange the same building blocks of consecutive shifts and rest days to shift where the heavy weeks fall or how nights are distributed. The core mechanics stay the same: four crews, 12-hour shifts, a 28-day cycle, about 42 hours per week, and continuous coverage. The differences are refinements for fatigue distribution or weekend fairness, not fundamentally different schedules.