Useful next calculations
When to use this calculator
- Before accepting a pay change, bonus, pension contribution or salary-sacrifice option.
- When you want a simple take-home estimate before payroll or filing.
- When you are approaching the £100,000 income level and want to see the personal allowance taper.
- When you need to convert between hourly, monthly and annual pay.
A worked example
These are the example figures the calculator opens with.
| Input | Value |
|---|---|
| Hourly Rate (£) | £15 |
| Overtime Hours | 10 |
| Overtime Multiplier (e.g. 1.5) | 1.5 |
For those figures the calculator returns:
- Overtime pay: £225.00
- Effective rate: £22.50/hr
How to read your results
Effective Rate
The effective rate lets you compare options on a like-for-like basis rather than being misled by different compounding periods or fee structures.
Method & assumptions
This calculator estimates gross overtime pay by multiplying your hourly rate by overtime hours and the premium multiplier you enter. For example, a 1.5 multiplier represents time-and-a-half and a 2 multiplier represents double time.
It does not calculate net pay, tax, payroll deductions or legal entitlement to overtime. Check your contract or applicable employment rules for the correct multiplier, then use a maintained local payroll calculator if you need an after-tax estimate.
Common mistakes
- Entering gross income when you really want take-home pay, or vice versa.
- Ignoring pension contributions, deductions or local tax rules that change the result.
- Comparing monthly and annual figures without standardising them first.
- Overlooking National Insurance or student-loan plan differences that apply to you.
What to do next
- Check the same scenario with related pay or deduction calculators.
- Keep a copy of the assumptions so you can compare the next tax year or pay period.
- If you are self-employed, compare this result with the self-employment tax calculator.
- Check whether a small pension contribution change moves take-home pay more than you expect.
Questions people ask
No, overtime is taxed at the same marginal rates as your regular pay. However, PAYE treats a given pay period in isolation, so a large overtime payment can briefly push you into a higher tax band under the emergency code until it balances out across the tax year.