International overtime
UK Overtime Calculator
Estimate UK extra-hours pay from hourly rate or salary assumptions, contracted weekly hours, extra hours, and a contract-based overtime multiplier.
How the UK overtime calculator works
The UK overtime calculator is different from many U.S.-style tools because UK employers do not automatically have to pay a higher overtime rate unless the contract, agreement, or workplace policy provides one. For that reason, the default multiplier is 1.0x, and the user can change it to match a contract term.
The calculator can use a direct hourly rate or estimate one from annual salary and contracted weekly hours. It then applies the selected contract multiplier to extra hours and shows an average hourly pay check when average hours are entered.
UK overtime calculator formula
The formula is a contract-rate estimate. It is not a statutory 1.5x overtime rule. If a contract says overtime is unpaid, paid at basic rate, paid at a premium, or handled through time off in lieu, edit the multiplier or use the result only as a comparison.
GOV.UK and ACAS guidance should be reviewed when overtime affects average pay, National Minimum Wage compliance, working time, or contract interpretation.
estimatedHourlyRate = hourlyRate or annualSalary / 52 / contractedWeeklyHours
extraHoursPay = extraHours x estimatedHourlyRate x contractMultiplier
weeklyContextPay = estimatedHourlyRate x contractedWeeklyHours + extraHoursPay
averageHourlyPay = weeklyContextPay / averageHoursForPayCheckUK contract-rate example
Suppose the hourly rate is GBP 15, contracted weekly hours are 37.5, and the worker completes 5 extra hours at a 1.0x contract multiplier. The tool estimates GBP 75 for the extra hours. If the contract uses 1.25x, the same 5 hours would estimate to GBP 93.75.
This example shows why the contract multiplier matters. The calculator can model a premium, but it does not say the premium is legally required.
UK contract and minimum wage notes
UK overtime rights are closely tied to contract wording, workplace agreements, and minimum wage rules. A worker may be asked to work overtime, paid for overtime, or given time off in lieu depending on the contract and policy, but the average pay must not fall below the applicable minimum wage.
This page includes an average-pay check field for planning. It does not decide the applicable minimum wage rate, worker status, working time limits, or whether overtime is compulsory.
What this UK calculator does not decide
This page does not calculate UK income tax, National Insurance, pension contributions, holiday pay, tribunal rights, working time opt-outs, or contract enforceability. It also does not replace GOV.UK, ACAS, payroll, or legal advice.
Use the estimate to model extra-hours pay once you know the contract rate. For important questions, review the contract and official guidance.
International overtime calculators
Use these country and region pages to compare local overtime assumptions without treating one jurisdiction as a universal rule. Each page links to official labor sources and keeps the calculator inputs editable because contracts, worker categories, industry rules, and public-sector rules may change the result.
Official sources
Educational estimate
This calculator provides an estimate for educational purposes only. Overtime rules vary by country, state, industry, employment status, and company policy. It is not legal, tax, or payroll advice.