Shift Differential Pay: Formula and Examples

By Intious · Updated September 7, 2026

Quick answer

Multiply eligible shift hours by the premium per hour. For a percentage premium, first multiply the base hourly rate by the differential percentage. Add that premium to ordinary gross pay.

Percentage differentials

At a $24 base rate with a 12% night differential, the premium is $2.88 per eligible hour. The night-shift rate is therefore $26.88 before other premiums.

Flat-dollar differentials

A flat $2 premium adds $2 for each eligible hour regardless of the base rate. Twenty-four eligible hours add $48 to gross pay.

Mixed weeks

Separate ordinary and differential-eligible hours instead of applying the premium to the whole week. This is especially important when only part of an overnight shift falls inside the premium window.

Include premiums in the regular-rate estimate

This tool models the shift differential in the weighted regular rate. It adds the straight-time earnings for all hours, divides by total hours, and then adds a half-time premium for the entered overtime hours. Other payments and special rules may change the applicable rate.

Separate the premium from the base pay

Suppose you work 40 hours at a $24 base rate and 12 of those hours qualify for a $3 differential. Base earnings are $960; the eligible premium adds $36, giving $996 before other adjustments. The premium is not $3 multiplied by all 40 hours, and it is not another 12 hours of base pay. Enter total hours once, then identify the subset that earns the premium. Use a separate record when different eligible hours have different premiums; one blended input can hide which rule was applied.

Try it with your numbers

Estimate extra pay from night, evening, weekend or other premium hours.

Shift Differential Calculator

Official guidance

U.S. Department of Labor: hours worked · U.S. Department of Labor: regular rate of pay

Next steps

Calculation limitations · Report a correction

Frequently asked questions

What is a 10% shift differential at $20 an hour?

Ten percent of $20 is $2 extra per eligible hour. Twelve eligible hours add $24 in straight-time premium earnings. The percentage applies to the entered base rate.

Is shift differential the same as overtime?

No. A differential applies to eligible shift hours, while overtime is a separate calculation. The tool allows the same hour to qualify for both without counting it twice as time worked.

Does this calculate take-home pay?

No. It estimates gross pay before taxes, benefits and other deductions. It also excludes bonuses and other pay components not entered in the model.

Can premium hours exceed total hours?

Not in this single-premium model. Enter only the subset of total hours receiving the premium. Overlapping premiums at different rates require a separate calculation.

Should I add differential hours to total hours?

No. They are a subset of the total. If you worked 40 hours and 12 qualified for a premium, enter 40 total and 12 eligible.

Check the assumptions against the Shift Differential Calculator and keep the inputs alongside your result. For a discrepancy, send an anonymous worked example rather than private employee records.

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