Pay & planning
Shift Differential Estimator
Estimate base gross pay and an added flat-dollar or percentage shift premium for selected hours. Free shift differential calculator for U.S. hourly workers.
Know the numbers
How to use this calculator
Enter total paid time and base rate, then the time eligible for a premium. Choose a flat extra dollar amount per hour or a percentage of the base hourly rate.
A worked example
40 hours at $20 plus a $2-per-hour premium on 16 hours gives $800 base pay + $32 premium = $832 estimated gross.
The calculation
Total = base pay for all minutes + premium rate × eligible minutes ÷ 60. Percent premium rate = base rate × percent ÷ 100.
Before you use the result
This is an additive premium estimate. It does not compute overtime or establish legal entitlement. Premiums can affect the regular rate used for overtime; consult the actual policy and applicable rules.
For coverage and federal overtime guidance, see the U.S. Department of Labor's Fact Sheet 23. Actual rules can differ from the simplified inputs used here.
Common scenarios
Use this calculator whenever you need to verify your hours, check a paycheck, or prepare a timecard submission. The result is the same arithmetic the payroll department uses, displayed in a form you can inspect.
Calculation methodology: View formulas, limits, and corrections
Common questions about Shift Differential Estimator
How is a shift differential calculated?
Enter your total hours, base rate, and the hours eligible for the premium. The calculator adds base pay for all hours plus the premium for eligible hours.
Does a shift differential affect overtime?
Yes — premiums can increase the regular rate used for overtime calculations. Consult your employer's policy and applicable rules.