Overtime Pay Calculator
Calculate overtime pay with different rate multipliers. See regular vs overtime breakdown and total earnings for any pay period.
Time and a half (1.5x) is the most common overtime rate
Enter hours and rates to calculate overtime pay
Understanding Overtime Pay in the UK
Is Overtime Pay Required by Law?
In the UK, there is no legal requirement for employers to pay overtime at enhanced rates. The only legal requirement is that workers must not be paid below the National Minimum Wage when their total pay is averaged over their total hours worked. This means that if overtime hours bring the average hourly rate below NMW, the employer is breaking the law. Beyond this, overtime rates are entirely a matter of contract between employer and employee.
Common Overtime Rate Structures
While not legally required, many UK employers offer enhanced overtime rates. The most common structure is time and a half (1.5x) for weekday overtime and double time (2x) for weekends and bank holidays. Some sectors, particularly manufacturing and healthcare, have collective agreements that set overtime rates. Other employers pay overtime at the standard hourly rate (1x) or offer time off in lieu (TOIL) instead of additional pay.
Working Time Regulations
The UK Working Time Regulations limit the working week to 48 hours on average (calculated over a 17-week reference period). Workers can opt out of this limit by signing a written agreement, but employers must not pressure them to do so. Workers who do opt out can withdraw their agreement by giving notice. Certain sectors have different rules, including transport, offshore work, and junior doctors.
Overtime and Holiday Pay
Following several UK court rulings, regular overtime should be included when calculating holiday pay. This applies to guaranteed overtime, non-guaranteed overtime that employees are required to work when offered, and voluntary overtime that is worked with sufficient regularity. The reference period for calculating average overtime is 52 weeks. This is an important consideration for employers who offer regular overtime.
Tax on Overtime
Overtime pay is taxed in exactly the same way as regular pay — it is added to your gross pay and subject to income tax and National Insurance at your marginal rate. There is no special tax treatment for overtime earnings. This means that overtime pay may push you into a higher tax bracket, resulting in a lower net hourly rate for overtime compared to regular hours.
Overtime Pay FAQ
Can my employer force me to work overtime?
It depends on your contract. If your contract includes an overtime clause, your employer can require you to work reasonable overtime. If your contract does not mention overtime, you are not obligated to work extra hours. Even with an overtime clause, you cannot be forced to work more than an average of 48 hours per week unless you have opted out of the working time limit.
Does overtime count towards my pension?
It depends on your pension scheme rules. Under auto-enrolment, contributions are calculated on qualifying earnings (£6,240 to £50,270 in 2025/26), which includes overtime pay. However, some employer pension schemes may exclude overtime from pensionable pay. Check your pension scheme documentation for the specific rules that apply to you.
What is TOIL (Time Off in Lieu)?
Time Off in Lieu is when an employer offers time off instead of paying overtime. For example, if you work 4 hours overtime, you may receive 4 hours (or more, depending on the agreement) of paid time off at a later date. TOIL arrangements must be agreed between employer and employee, and many organisations have formal TOIL policies.
Related HR Terms
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