Quick answer: on 7 on 7 off, each crew works seven 12-hour shifts in a row and then has 7 days off: 84 hours in the working week and none in the next, 42 on average. With 4 crews, each works a week of days, a week off, a week of nights and a week off.
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The 7 on 7 off pattern, day by day
One crew, one full 28-day cycle:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Day | Day | Day | Day | Day | Day | Day | Off | Off | Off | Off | Off | Off | Off | Night | Night | Night | Night | Night | Night | Night | Off | Off | Off | Off | Off | Off | Off |
7 on 7 off hours by workweek
42 hours a week on average; single weeks from 0 to 84. Overtime over 40: 4 to 22 hours a week on average, set by the cycle day the workweek begins.
| Workweek begins on | Hours in each week of the 28-day repeat | Average overtime per week |
|---|---|---|
| Day 1 | 84, 0, 84, 0 | 22 |
| Day 2 | 72, 12, 72, 12 | 16 |
| Day 3 | 60, 24, 60, 24 | 10 |
| Day 4 | 48, 36, 48, 36 | 4 |
| Day 5 | 36, 48, 36, 48 | 4 |
| Day 6 | 24, 60, 24, 60 | 10 |
| Day 7 | 12, 72, 12, 72 | 16 |
Who works 7 on 7 off
It suits sites where travel to work is long, so fewer trips matter more than short days. The working week is heavy: 84 hours is 44 over the federal 40, unless the employer places the workweek so it splits the block, which is why the table shows such a wide range.
Shorter blocks with the same 42-hour average: the 4 on 4 off schedule.
Sources: DOL: Overtime pay. Rules checked . Found a problem? Tell us.
Questions
Is 7 on 7 off overtime?
A 7-shift, 84-hour week is 44 hours over 40 in that workweek, unless the workweek boundary splits the block into two lighter weeks.