Overtime Calculator UK
Our overtime calculator helps you estimate gross overtime pay using either an hourly rate or an annual salary. You can add multiple overtime rows to reflect different overtime rates, such as time and a half, double time, custom multipliers or a custom overtime hourly rate.
If you are paid hourly, you only need to enter your hourly rate. If you are salaried, you can enter your annual salary along with your standard hours per week and weeks worked per year. By default, salaried calculations use 37.5 hours per week and 52 weeks per year.
What this overtime calculator shows
This tool can estimate:
- Equivalent hourly rate from salary
- Total overtime pay across multiple overtime entries
- Total overtime hours
- Average overtime hourly rate
- Gross total for all overtime rows combined
How to use the overtime calculator
Start by choosing whether you are paid hourly or by annual salary. Enter your pay details, then add one or more overtime rows. For each row, enter the number of overtime hours and choose the overtime type.
This is useful if, for example, you worked some hours at 1.5×, some at 2×, and some at a different custom rate. The calculator adds them all together automatically.
How overtime pay is worked out
Overtime pay is generally calculated by applying an overtime rate to your base hourly rate. For salaried workers, the calculator first estimates an equivalent hourly rate using:
Annual salary ÷ (hours per week × weeks per year)
Each overtime row is then calculated separately and added together for a total overtime amount.
Important note
This calculator provides an estimate of gross pay before deductions. It does not include income tax, National Insurance, pension contributions, salary sacrifice, unpaid breaks, bonuses or employer-specific payroll rules. Actual pay may differ depending on your contract and payroll setup.
Use the UK Fin Lab overtime calculator
Use the UK Fin Lab overtime calculator above to estimate overtime pay quickly and compare how different overtime rates affect your total gross overtime earnings.