What Is an Overtime Pay Calculator?
An overtime pay calculator helps you work out how much extra you earn when you work beyond your contracted hours. Overtime is usually paid at a higher rate than your regular pay — commonly time and a half (1.5×) or double time (2×) — though the exact rate depends on your employer and contract.
This UK overtime pay calculator lets you enter your regular hourly rate or salary, your normal hours, your overtime hours, and the multiplier that applies. It then gives you a clear figure for overtime earned per week, per month, and per year, alongside your regular pay so you can see the full picture.
How to Use This Calculator
- Enter your regular hourly rate, or choose a weekly, monthly, or annual salary and the calculator will convert it to an hourly rate for you.
- Set your regular contracted hours per week.
- Enter the overtime hours you work each week.
- Choose your overtime rate: plain time, time and a half, double time, or a custom multiplier.
- Set how many weeks per year you work overtime.
- Press Calculate to see your weekly, monthly, and annual overtime and total gross pay.
What the Result Shows
The results panel shows your overtime hourly rate, your weekly overtime pay, your weekly total gross pay (regular plus overtime), and a full annual breakdown. The visual bars make it easy to see how much overtime adds to your regular earnings each week.
All figures shown are gross — before Income Tax, National Insurance, pension, or other deductions. Use the Take Home Pay Calculator to see estimated net pay including overtime.
Common UK Overtime Rates
There is no UK law that sets a minimum overtime rate above the National Minimum Wage. However, most employers pay overtime at one of the following multipliers:
| Rate Name |
Multiplier |
Example (£20/hr base) |
Overtime Hourly Rate |
| Plain time |
1× |
£20.00 |
£20.00 / hr |
| Enhanced rate |
1.25× |
£20.00 |
£25.00 / hr |
| Time and a half |
1.5× |
£20.00 |
£30.00 / hr |
| Enhanced rate |
1.75× |
£20.00 |
£35.00 / hr |
| Double time |
2× |
£20.00 |
£40.00 / hr |
How Is Overtime Pay Calculated?
Overtime pay is calculated by multiplying your regular hourly rate by the agreed overtime multiplier, then multiplying the result by the number of overtime hours worked.
Formula: Overtime Pay = Regular Hourly Rate × Overtime Multiplier × Overtime Hours Worked
Example: £20.00 × 1.5 × 8 hours = £240.00 overtime pay for the week.
If you are paid a salary rather than an hourly rate, the hourly rate is derived by dividing your salary by your contracted hours. For a monthly salary, divide by (regular hours per week × 52 / 12). This calculator handles that conversion automatically when you select a salary pay period.
Does Overtime Affect Tax and National Insurance?
Yes. Overtime pay is taxable income. It is added to your regular salary and subject to Income Tax and National Insurance through PAYE in the same way as any other earnings. If overtime pushes your total earnings into a higher tax band, you may pay a higher rate of Income Tax on the portion above the threshold.
Income Tax on Overtime
If your total annual earnings including overtime remain within the basic rate band (up to £50,270 for 2026 / 27), you pay 20% Income Tax on earnings above the personal allowance. Earnings above £50,270 are taxed at 40%.
National Insurance on Overtime
Overtime pay is included in your NI-able earnings. You pay 8% NI on earnings between the Primary Threshold (£12,570) and the Upper Earnings Limit (£50,270), and 2% above that.
This calculator shows gross overtime pay only. To see your estimated take-home pay after all deductions, use the Take Home Pay Calculator and enter your overtime amount in the Overtime Pay field.
Overtime Pay Calculator UK FAQs
Is there a legal minimum overtime rate in the UK?
There is no statutory minimum overtime rate above the National Minimum Wage. Your employer must pay at least the National Minimum Wage for every hour worked, including overtime. Any higher overtime rate depends on your employment contract.
What is the difference between time and a half and double time?
Time and a half means you are paid 1.5 times your regular hourly rate for each overtime hour. Double time means you are paid 2 times your regular rate. For example, if your base rate is £20 per hour, time and a half gives £30 per hour and double time gives £40 per hour.
Does voluntary overtime count for holiday pay?
Following UK case law, regular voluntary overtime may need to be included in holiday pay calculations. If you work regular overtime, your employer may be required to factor it into your holiday pay. ACAS guidance or legal advice is recommended for your specific situation.
Can my employer make me work overtime?
Your employer can only require you to work overtime if your contract allows it. Compulsory overtime must be set out in your employment contract. Even with a contractual obligation, you cannot be required to work more than 48 hours per week on average unless you have opted out of the Working Time Regulations in writing.
Are the figures gross or net?
All figures in this calculator are gross — before Income Tax, National Insurance, pension contributions, or any other deductions. Your actual take-home pay will be lower. Use the Take Home Pay Calculator to estimate net pay including overtime.
What if my overtime rate changes partway through the year?
This calculator uses a single rate for the full period. If your overtime rate changes, you can run separate calculations for each rate and add the results together, or enter the total overtime pay directly into the Take Home Pay Calculator.
Final Note
The Overtime Pay Calculator UK is a quick planning tool for estimating gross overtime earnings. All results are estimates based on the figures you enter. Your actual pay depends on your employment contract, payroll schedule, and any deductions applied by your employer. For precise figures, refer to your payslip or speak to your payroll or HR team.
