For a flat premium, differential pay = qualifying hours × extra dollars per hour. For a percentage, first multiply the base rate by the percentage.
01Flat and percentage examples
| Policy | Shift rate | Extra for 8 hours |
|---|---|---|
| +$2.50/hour | $24.50 | $20.00 |
| +10% | $24.20 | $17.60 |
02Only enter qualifying hours
The tool does not decide which shift, job or time window qualifies. Use the premium and eligible hours from the employer policy, agreement or pay record.
Shift differentials can affect the regular rate used for overtime. This page estimates straight-time wages and the stated premium only; use a payroll professional or the applicable official method for mixed-rate overtime.
Common questions
Is a night differential always required?
No general federal rule requires a night premium. It may come from policy, contract, collective bargaining or another applicable rule.
Does the premium apply to every hour?
Only to hours that meet the policy’s definition. Enter base-shift and differential-shift hours separately.