Basic pay, overtime and the total for a week or a month, at the overtime rate in your contract.
Overtime pay (gross)
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Enter your hourly rate and the hours you worked to see the result.
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Enter your basic hourly rate, the basic hours in your contract and the hours you actually worked. The calculator splits basic hours from overtime, applies your overtime rate and shows your gross pay for the week or the month, with the workings. Amounts are rounded to the nearest penny. It also checks your average pay against the National Minimum Wage for your age.
Overtime usually means any time worked beyond the normal hours fixed by your contract. Enter the pay for one ordinary hour and the weekly hours your contract sets before overtime starts, for example 37.5 or 40.
UK law does not set an overtime rate: your contract does. Common rates are time and a half (× 1.5) and double time (× 2). Choose ‘Other multiplier’ for any other rate, or enter 0 if your overtime is unpaid.
‘One month’ multiplies a typical week’s hours by 52 ÷ 12, for people paid monthly who work the same hours every week. If your hours change from week to week, work out each week on its own.
Your employer does not have to pay for overtime, but your average pay for all the hours you work must not fall below the minimum wage. Only pay up to the lowest hourly rate in your contract counts towards it: overtime premiums do not, and if your overtime is paid below your basic rate, every hour, basic hours included, counts only at that lower rate. Unpaid overtime adds hours with no pay. Since 1 April 2026 the hourly minimum is £12.71 from age 21, £10.85 at 18 to 20, and £8.00 under 18 and for apprentices.
Overtime hours = hours worked in the week − basic hours.
Overtime pay = overtime hours × hourly rate × multiplier.
Basic pay = basic hours × hourly rate.
For a month: weekly hours × 52 ÷ 12.
Each amount is rounded to the nearest penny, and overtime pay and the total are the sum of the rounded amounts.
Basic pay is 37.5 × £12.71 = £476.63. The 7.5 hours of overtime at time and a half pay 7.5 × £12.71 × 1.5 = £142.99, of which £47.66 is the premium, so the week comes to £619.62. Had the same 7.5 hours been unpaid on a basic rate of £13.00, pay would average £10.83 an hour over the 45 hours, below the £12.71 National Living Wage.
No. UK law does not require overtime pay or a higher rate for overtime; your contract usually sets the rate and how it is worked out. What the law does require is that your average pay for all the hours you work does not fall below the National Minimum Wage.
Your basic hourly rate multiplied by 1.5. At £12.71 an hour, one hour at time and a half pays £19.07 (£19.065, rounded to the nearest penny). Double time is your rate multiplied by 2: £25.42.
Only if your contract says so. Even then, you cannot usually be made to work more than 48 hours a week on average, normally over 17 weeks, unless you have agreed in writing to work more. Workers under 18 cannot work more than 8 hours a day or 40 hours a week.
You are normally paid your hourly rate for extra hours. Your employer will usually only pay an overtime rate if you work beyond the normal hours of full-time staff and they would get extra pay for those hours, or at unsocial times when full-time staff would get more. To work this out, enter full-time staff’s normal hours as your basic hours.
Some employers give time off instead of paying for overtime, known as time off in lieu (TOIL). You agree the terms, such as when it can be taken, with your employer.
The minimum wage rates apply across the UK. The 48-hour average comes from the Working Time Regulations 1998, which extend to Great Britain only: Northern Ireland has its own working time rules, so check them on nidirect if you work there.
This calculator gives general information, not legal, tax, financial or accounting advice. Your contract, a collective agreement or your employer’s policy may set different rules: check them, or ask Acas or an adviser.
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