Shift Differential Calculator
How much do nights and weekends actually add? Enter your base rate and premium — see the extra cash per shift, week and year.
What counts as a shift differential?
A shift differential is premium pay for working hours most people avoid — overnight shifts, weekend rotations, holidays, or on-call blocks. Two structures exist:
- Percentage-based: e.g. "nights pay base + 12%". Common in hospitals and healthcare systems.
- Flat-rate: e.g. "+$4.00/hour". Common in manufacturing, logistics and call centers.
This calculator uses percentages. For a flat rate, divide it by your hourly rate first ($4 ÷ $28 ≈ 14.3%) and enter that.
Why differentials matter more than they look
A 10% differential sounds small until you multiply it across a career of three-night weeks: at $32/hour it is ~$5,700/year before overtime effects — and because FLSA treats differentials as part of your regular rate, they also raise what each overtime hour is worth.
Verify qualifying windows with your facility policy; many employers define exact clock times (e.g. 19:00–07:00) rather than whole shifts.