Overtime Pay Calculator
Calculate your total earnings including overtime hours. Enter your hourly rate, regular hours, and overtime details below.
Total Gross Pay
£0.00
Regular Pay
£0.00
Overtime Pay
£0.00
Total Hours
0
Effective Rate
£0.00/hr
Pay Breakdown Explained
How to Use This Calculator
This overtime calculator helps you work out your total earnings when you’ve put in extra hours beyond your regular schedule. Here’s how to get accurate results:
- Enter your standard hourly rate in pounds. This is what you earn during your normal working hours.
- Input the number of regular hours you work in the selected period (weekly or monthly).
- Choose whether you’re calculating for a week or a month using the pay period dropdown.
- Enter the overtime hours you’ve worked at the first rate, then select the appropriate multiplier (typically time and a half).
- If you worked overtime at a different rate (like double time on Sundays), add those hours in the second rate section.
- Click “Calculate Earnings” to see your complete pay breakdown.
Quick Example
Sarah earns £15 per hour and works 37.5 regular hours per week. This week, she worked 4 extra hours at time and a half, and 3 hours on Sunday at double time. Her calculation would be:
- Regular pay: £15 × 37.5 = £562.50
- Overtime (1.5x): £22.50 × 4 = £90.00
- Overtime (2x): £30.00 × 3 = £90.00
- Total gross pay: £742.50
How Overtime Pay Works in the UK
Contrary to what many workers believe, there’s no automatic legal entitlement to overtime pay in the UK. Your right to enhanced pay for extra hours depends entirely on your employment contract and your employer’s policies.
What the Law Actually Says
UK employment law only requires that your average pay across all hours worked doesn’t drop below the National Minimum Wage or National Living Wage. As of April 2025, the National Living Wage for those aged 21 and over is £12.21 per hour. This means employers can pay you your standard rate for overtime, as long as your total earnings divided by total hours worked meets the minimum wage threshold.
Common Overtime Rate Structures
While not legally mandated, many UK employers offer enhanced rates for overtime to reward employees and maintain morale. Here’s what’s typically offered:
Time and a Half
1.5x
Most common rate
£12/hr becomes £18/hr
Double Time
2x
Sundays & bank holidays
£12/hr becomes £24/hr
Standard Rate
1x
No enhancement
£12/hr stays £12/hr
Overtime and Holiday Pay
Since April 2022, UK law requires that regular overtime be included when calculating holiday pay. If you’ve worked overtime in at least 5 out of the last 8 weeks before taking holiday, you’re considered a “regular overtime worker.” Your employer must factor this overtime into at least 4 weeks of your statutory holiday pay by calculating your average weekly pay over the previous 52 weeks.
Working Time Regulations
Even though employers aren’t required to pay overtime premiums, they must comply with Working Time Regulations. You cannot be forced to work more than 48 hours per week on average (calculated over 17 weeks) unless you’ve signed an opt-out agreement. You’re also entitled to at least 11 consecutive hours of rest in every 24-hour period and one full day off each week.
Different Types of Overtime
UK employment contracts typically define overtime in several ways, each with different implications for both you and your employer:
Voluntary Overtime
This is the most flexible arrangement. Your employer offers extra hours, and you can choose whether to accept them. Neither party is obligated—you can say no, and your employer can stop offering these hours at any time. This suits seasonal businesses or those with fluctuating demand.
Guaranteed Overtime
Your contract specifies a certain amount of overtime that your employer must offer you, and you must accept it. This provides income stability, as you can rely on these extra hours and the associated pay. It’s common in industries with predictable busy periods.
Non-Guaranteed Compulsory Overtime
Your employer isn’t obliged to offer overtime, but when they do, you must work it. This arrangement gives employers flexibility whilst requiring you to be available when needed. Refusing this overtime could be considered a disciplinary matter.
Compulsory Overtime
Your contract explicitly states you must work overtime when required, and your employer can enforce this. Whilst this might feel restrictive, it should be clearly outlined in your contract before you start the role. You cannot be dismissed for refusing to work beyond the 48-hour weekly average unless you’ve opted out.
| Type | Employer Obligation | Employee Obligation | Typical Use |
|---|---|---|---|
| Voluntary | No obligation to offer | Can refuse | Seasonal peaks |
| Guaranteed | Must offer specified hours | Must work when offered | Regular busy periods |
| Non-Guaranteed | No obligation to offer | Must work when offered | Unpredictable demand |
| Compulsory | Can require as needed | Must work when required | 24/7 operations |
Frequently Asked Questions
Am I entitled to time and a half in the UK?
No, there’s no automatic legal right to enhanced overtime pay rates like time and a half in the UK. Whether you receive 1.5 times your normal rate depends entirely on what’s written in your employment contract or collective bargaining agreement. Many employers do offer it as standard practice, but they’re not legally required to do so. Always check your contract to see what overtime rates apply to you.
Can my employer force me to work overtime?
Only if your employment contract explicitly states that you must work overtime when required. If your contract includes compulsory or non-guaranteed compulsory overtime clauses, then yes, your employer can require you to work extra hours. However, they still cannot make you work more than 48 hours per week on average unless you’ve signed an opt-out agreement. If your contract specifies voluntary overtime only, you can decline without consequences.
How does overtime affect my tax?
Overtime pay is taxed exactly like your regular earnings. It’s added to your gross pay for the period, and you’ll pay Income Tax and National Insurance on the total amount according to your tax bracket. If your overtime pushes you into a higher tax band, only the amount above the threshold is taxed at the higher rate. There’s no separate or additional tax on overtime earnings.
Should overtime be included in my holiday pay?
Yes, if you regularly work overtime. Since the 2022 Flowers v East of England Ambulance Trust ruling, employers must include regular overtime when calculating holiday pay for at least 4 weeks of your statutory leave. You’re considered a regular overtime worker if you’ve worked extra hours in 5 out of the previous 8 weeks. Your holiday pay should reflect your average weekly earnings over the last 52 weeks, including overtime.
What’s the maximum overtime I can work?
Under the Working Time Regulations 1998, you cannot be required to work more than an average of 48 hours per week (calculated over 17 weeks) unless you voluntarily sign an opt-out agreement. There’s no specific limit on overtime hours themselves, but your total working time including overtime must respect this 48-hour average. You’re also entitled to rest breaks: 11 consecutive hours every 24 hours, and at least one day off per week.
Can I take time off in lieu instead of overtime pay?
Yes, if your employer offers TOIL (Time Off In Lieu) and it’s specified in your contract or agreed between you. TOIL means taking paid time off instead of receiving extra money for overtime hours worked. The arrangement should be clear about the rate (for example, whether 1 hour of overtime equals 1 hour or 1.5 hours of TOIL). Make sure any TOIL agreement is documented, as informal arrangements can lead to disputes about how much time you’re owed.
Do I get overtime for working weekends or bank holidays?
Not automatically. Unless your contract specifically states that weekend or bank holiday work attracts enhanced pay rates, you might only receive your standard hourly rate. Many employers do pay premium rates (often double time) for Sundays and bank holidays as an incentive, but this is company policy rather than legal requirement. Part-time workers should receive the same overtime rates as full-time colleagues once they exceed normal full-time hours.
What if my employer refuses to pay for overtime I’ve worked?
If you’ve worked overtime that’s specified in your contract or that your employer asked you to work, they must pay you for those hours at least at the contracted rate. Start by raising the issue informally with your manager or HR department. If that doesn’t resolve it, follow your company’s grievance procedure. Keep records of all hours worked. If the issue continues, you can seek advice from ACAS (Advisory, Conciliation and Arbitration Service) or make a claim to an employment tribunal for unlawful deduction of wages.
Common Calculation Mistakes to Avoid
When working out your overtime pay, several errors can lead to incorrect results. Here’s what to watch out for:
Mixing Up Weekly and Monthly Figures
One of the most frequent mistakes is using weekly hours with a monthly rate, or vice versa. If you’re paid monthly, multiply your weekly hours by 4.33 (the average number of weeks per month) rather than 4. Using 4 underestimates your annual hours by about 2.5 weeks.
Forgetting About Multiple Overtime Rates
Many workers receive different rates for different types of overtime. For example, you might get time and a half for weekday overtime but double time for Sundays. Make sure you separate these hours and calculate each at its correct rate before adding them together.
Including Overtime in Regular Hours
Your regular hours are those specified in your contract—typically 35-40 hours per week. Overtime starts only after you’ve completed these contracted hours. Don’t accidentally count the same hours twice by including them in both your regular and overtime calculations.
Using Gross Salary Instead of Hourly Rate
If you’re salaried, you need to convert your annual salary to an hourly rate before calculating overtime. Divide your annual salary by 52 weeks, then divide by your contracted weekly hours. For example, £30,000 per year for 37.5 hours per week equals approximately £15.38 per hour (£30,000 ÷ 52 ÷ 37.5).
Calculation Example: Avoiding Common Errors
Scenario: James earns £28,000 annually, works 35 hours per week, and worked 6 extra hours this week (4 hours at time and a half on Thursday, 2 hours at double time on Sunday).
Step 1: Calculate hourly rate: £28,000 ÷ 52 ÷ 35 = £15.38 per hour
Step 2: Regular pay: £15.38 × 35 = £538.30
Step 3: Overtime rate 1: £15.38 × 1.5 × 4 = £92.28
Step 4: Overtime rate 2: £15.38 × 2 × 2 = £61.52
Total: £538.30 + £92.28 + £61.52 = £692.10 for the week
References
- UK Government. (2025). National Minimum Wage and National Living Wage rates. GOV.UK. Available at: https://www.gov.uk/national-minimum-wage-rates
- The Working Time Regulations 1998 (SI 1998/1833). UK Statutory Instruments. The National Archives.
- Employment Rights Act 1996. UK Public General Acts. legislation.gov.uk.
- ACAS. (2025). Working time and pay: Overtime. Advisory, Conciliation and Arbitration Service. Available at: https://www.acas.org.uk
- Bear Scotland Ltd v Fulton [2015] ICR 221. Employment Appeal Tribunal decision on overtime and holiday pay calculations.
- Flowers and others v East of England Ambulance Trust [2019] EWCA Civ 947. Court of Appeal ruling on regular overtime and holiday pay.
- Citizens Advice. (2025). Overtime and your rights. Citizens Advice Bureau. Available at: https://www.citizensadvice.org.uk