Staffing calculators · 12-hour overtime
12-Hour Shift Overtime Calculator
for rotating schedules
A 12-hour rotating schedule averages 42 hours a week, but overtime is paid one workweek at a time, so the same rotation can cost very different amounts depending on how its weeks fall. This 12-hour shift overtime calculator runs a full Panama, Pitman, DuPont or 4-on-4-off rotation for all four crews, applies federal, California or 8-and-80 rules with night differential in the regular rate, and shows the yearly overtime cost of one round-the-clock post and the bill at your markup.
Schedule and rules
Pay
Bill (optional)
One round-the-clock post, four crews
Overtime premium per year
$0.00
Average hours per person per week
0
Overtime hours per person, 8 weeks
0
Gross pay per year (post)
0
Overtime share of pay
Yearly bill at your markup
Invoice
$0.00
Spread
$0.00
Spread %
0%
Spread is the invoice minus gross pay, before payroll taxes, workers' comp and other burden. Use the labor burden calculator to see what is left after those.
Hours by workweek, 8 weeks
| Crew | W1 | W2 | W3 | W4 | W5 | W6 | W7 | W8 |
|---|
Hours worked in each workweek. Shaded cells include overtime.
Same rotation, different workweek start
| Workweek starts on | OT hours per person, 8 weeks | OT premium per year (post) |
|---|
A workweek can start on any day, but a change must be meant to be permanent and not made to avoid overtime (29 CFR 778.105). Talk to your payroll provider before changing it.
Each job is counted in the workweek it starts. Overtime premium is paid on the regular rate for each workweek (each 14-day period under 8-and-80). California results assume no alternative workweek agreement. General information, not legal or payroll advice.
How to calculate overtime on a 12-hour schedule
Lay the rotation out against your fixed workweeks, total each person's hours per workweek, and pay overtime on every hour over 40 at one and a half times that week's regular rate. On a Panama rotation, a workweek that starts on the first day of the cycle splits the hours into alternating weeks of 60 and 24, so every other week carries 20 hours of overtime. Start the workweek a day later and the same rotation splits into weeks of 48 and 36, and the overtime drops to 8 hours every other week.
- 1Map the rotation to workweeks
Overtime is counted one fixed workweek at a time, and hours cannot be averaged across weeks, even though the rotation averages 42.
- 2Find the regular rate
Add base pay and night differential for the week and divide by the hours. A differential raises the rate overtime is paid on. See the shift differential calculator for one week in detail.
- 3Apply your state's rule
California adds daily overtime after 8 hours and double time after 12, so every 12-hour job carries 4 overtime hours. Hospitals on the 8-and-80 system pay overtime after 8 hours a day and 80 in 14 days.
- 4Price it into the bill rate
If the client pays overtime at a multiple of the bill rate, the spread holds. If overtime is billed at straight time, every overtime hour comes out of your margin.
For the rotations themselves, with copy-ready grids for crews A to D, see 12-hour shift schedule templates. In NextCrew, pay and bill rates, including differentials and overtime, are set by client, position and job, and a job schedule places each Crew Member on only the days they work, so approved timesheets carry the right hours into payroll and invoices. See scheduling and job management.
Frequently asked questions
Run round-the-clock rotations without the spreadsheet
Recurring jobs, job schedules, differentials and overtime rules that flow from approved timesheets to payroll and invoices.