Overtime Pay Calculator
If you work extra hours beyond your contracted timetable, calculating your additional gross pay requires applying the correct overtime multiplier to your baseline hourly rate. In the UK, overtime arrangements vary widely: some employers pay flat hourly rates, while others offer enhanced multipliers such as time and a half (1.5x) for weekday evenings or Saturdays, and double time (2.0x) for Sundays and public holidays.
Overtime Pay Calculator
£0.00
Total overtime pay (gross)
This calculator allows you to compute your exact overtime earnings whether you are paid an hourly wage or a fixed annual salary. It calculates your enhanced hourly rate, total extra pay for the hours worked, and combined gross income for the pay period.
These figures represent gross earnings before PAYE income tax, statutory payroll deductions, and pension contributions. If your standard contract is part-time rather than full-time, try our full Pro Rata Salary Calculator to work out your baseline salary before adding overtime.
How Overtime Pay Is Calculated in the UK
The standard formula for calculating overtime earnings consists of three steps: determining your baseline hourly rate, applying the contracted overtime multiplier, and multiplying that enhanced rate by the number of extra hours worked.
The core formula:
Overtime Hourly Rate = Standard Hourly Rate × Overtime MultiplierTotal Overtime Pay = Overtime Hourly Rate × Overtime Hours Worked
Common UK Overtime Multipliers
While overtime rates depend entirely on your employment contract, standard industry benchmarks include:
| Overtime Rate | Multiplier | Typical Usage in UK Employment |
|---|---|---|
| Plain time / Standard rate | 1.0x | Additional hours worked by part-time staff up to full-time equivalent hours (37.5 hrs/wk) |
| Time and a quarter | 1.25x | Early morning or late evening weekday shift extensions |
| Time and a third | 1.333x | Common baseline enhancement in public sector and NHS Agenda for Change contracts |
| Time and a half | 1.5x | The most standard UK rate for weekday evening and Saturday overtime |
| Double time | 2.0x | Sunday shifts, weekend night rotas, and standard statutory Bank Holidays |
| Double time and a half | 2.5x | High-demand holiday shifts, such as Christmas Day and New Year's Day |
How to Calculate Your Hourly Rate from an Annual Salary
If you are employed on a fixed annual salary rather than an hourly wage, you must first convert your salary into a baseline hourly rate before applying any overtime multiplier.
The conversion formula:
Standard Hourly Rate = Annual Salary ÷ (Standard Contracted Weekly Hours × 52)Step-by-step example:
- A full-time employee earns an annual salary of £31,200.
- Their contract specifies 37.5 hours per week.
- Total annual contracted hours: 37.5 × 52 = 1,950 hours.
- Baseline hourly rate: £31,200 ÷ 1,950 = £16.00 per hour.
- At time and a half (1.5x), the overtime rate is: £16.00 × 1.5 = £24.00 per hour.
- If they complete 8 hours of overtime, total overtime pay equals: 8 × £24.00 = £192.00 gross.
Overtime Worked Examples — Hourly & Salaried Roles
The table below illustrates gross overtime pay across standard UK wage and salary levels for 10 hours of overtime:
| Baseline Pay | Standard Hourly Rate | Overtime Rate Type | Enhanced Hourly Rate | Overtime Pay (10 Hours) |
|---|---|---|---|---|
| £12.50 / hr (Hourly) | £12.50 | Time and a quarter (1.25x) | £15.63 | £156.25 |
| £12.50 / hr (Hourly) | £12.50 | Time and a half (1.5x) | £18.75 | £187.50 |
| £15.00 / hr (Hourly) | £15.00 | Time and a half (1.5x) | £22.50 | £225.00 |
| £15.00 / hr (Hourly) | £15.00 | Double time (2.0x) | £30.00 | £300.00 |
| £28,000 / yr (37.5 hrs/wk) | £14.36 | Time and a third (1.333x) | £19.15 | £191.45 |
| £28,000 / yr (37.5 hrs/wk) | £14.36 | Time and a half (1.5x) | £21.54 | £215.38 |
| £35,000 / yr (37.5 hrs/wk) | £17.95 | Time and a half (1.5x) | £26.92 | £269.23 |
| £35,000 / yr (37.5 hrs/wk) | £17.95 | Double time (2.0x) | £35.90 | £358.97 |
| £45,000 / yr (37.5 hrs/wk) | £23.08 | Time and a half (1.5x) | £34.62 | £346.15 |
| £45,000 / yr (37.5 hrs/wk) | £23.08 | Double time (2.0x) | £46.15 | £461.54 |
Note: Calculations use 52 working weeks per year. Figures rounded to 2 decimal places.
UK Employment Law: Overtime Regulations & Rights
UK employment law contains specific statutory protections regarding hours worked and pay rates. When working or calculating overtime, three core legal rules apply:
1. No Statutory Right to Enhanced Overtime Pay
Under UK employment legislation, employers are not legally required to pay enhanced rates (such as time and a half) for overtime unless it is explicitly stated in the employment contract, staff handbook, or collective bargaining agreement. An employer may legally pay standard basic hourly rates for overtime, or offer Time Off In Lieu (TOIL), provided the overall pay complies with minimum wage laws.
2. National Minimum Wage (NMW) Compliance
Even if an employee is salaried and performs unpaid overtime, their average pay across all hours worked within a pay reference period must never fall below the statutory National Minimum Wage rate.
If extra unpaid hours reduce your effective hourly rate below the legal minimum wage threshold, your employer is in breach of UK employment law.
3. The 48-Hour Working Week Limit
Under the Working Time Regulations 1998, employees cannot be forced to work more than an average of 48 hours per week (normally averaged over a 17-week reference period) unless they have voluntarily signed an individual opt-out agreement in writing. You have the legal right to opt back into the 48-hour limit at any time by giving your employer notice (typically between 7 days and 3 months, as specified in your contract).
4. Overtime and Statutory Holiday Pay
Following landmark legal rulings (including Bear Scotland v Fulton and Dudley Metropolitan Borough Council v Willetts), UK employers must include regular and guaranteed overtime in the calculation of statutory holiday pay for the first 4 weeks (20 days) of annual leave.
If you regularly work overtime, your holiday pay must reflect your normal remuneration rather than merely your basic contractual rate. For detailed rules on how holiday entitlement interacts with non-standard working patterns, see our guide on how to calculate pro rata holiday in the UK.
How Overtime Is Taxed in the UK
Overtime earnings are treated as regular employment income and taxed through the standard PAYE (Pay As You Earn) system.
Key tax considerations:
- No separate overtime tax rate: Overtime pay is not subject to a punitive or distinct tax band. It is simply added to your monthly gross pay and assessed against standard UK Income Tax bands and statutory payroll deduction thresholds.
- Temporary higher-rate deductions: If a significant amount of overtime causes your monthly pay to spike, HMRC's PAYE software may project that figure on an annualised basis, temporarily deducting tax at a higher rate for that single payslip. Any excess tax paid is automatically reconciled in subsequent payslips across the tax year or refunded at year-end.
- Pension deductions: Check your workplace pension scheme rules to confirm whether overtime hours count as pensionable earnings. In many schemes, only basic contractual pay is pensionable, though qualifying earnings schemes under auto-enrolment often include overtime.
Frequently Asked Questions
What does "time and a half" mean for overtime pay?
Time and a half means you are paid your standard hourly rate plus an additional 50% for every overtime hour worked (a 1.5x multiplier). For example, if your baseline pay is £16.00 per hour, your time-and-a-half rate is £24.00 per hour (£16.00 × 1.5). Working 5 hours of overtime at this rate yields £120.00 gross pay.
Is overtime mandatory in the UK?
Overtime is only mandatory if your employment contract explicitly states that you may be required to work additional hours. If your contract defines overtime as voluntary, you are free to accept or decline extra shifts without penalty. In all cases, mandatory overtime must not breach the 48-hour average working week limit unless you have signed an opt-out agreement.
Do part-time employees get overtime rates?
Under the Part-time Workers (Prevention of Less Favourable Treatment) Regulations 2000, part-time staff cannot be treated less favourably than comparable full-time staff. However, employers are generally permitted to pay part-time workers at plain time (standard hourly rate) for additional hours worked up to the standard full-time threshold (usually 37.5 hours per week). Once a part-time worker exceeds the full-time weekly hours threshold, enhanced overtime rates typically apply on the same terms as full-time staff.
How do I calculate overtime on a monthly payslip?
To verify overtime on your payslip, divide your basic annual salary by your annual contracted hours (weekly hours × 52) to find your hourly rate. Multiply that figure by your contract's overtime multiplier (e.g. 1.5x for time and a half), then multiply by the total overtime hours recorded on your timesheet. The resulting total should match the gross overtime pay line on your payslip.
What is the difference between overtime pay and TOIL?
Overtime pay provides monetary remuneration for additional hours worked. TOIL (Time Off In Lieu) allows you to take equivalent paid time off at a later date instead of receiving financial compensation. The terms for accumulating, approving, and taking TOIL must be defined in your employment contract or staff policy.
Does overtime pay affect my pension contributions?
Whether overtime is pensionable depends on your employer's scheme rules. Under statutory auto-enrolment rules using "qualifying earnings", overtime pay is included when calculating minimum percentage contributions. However, many defined benefit or occupational schemes (such as the NHS Pension Scheme or Teachers' Pension Scheme) treat standard basic salary as pensionable and exclude regular overtime hours, unless they represent additional part-time hours up to whole-time equivalent (WTE) hours.
Need to calculate pro rata pay for a part-time role? Try our full Pro Rata Salary Calculator for complete salary and hours breakdowns.
Working in public healthcare or education? See our specialised NHS Pro Rata Salary Calculator or Teacher Pro Rata Salary Calculator.
If your contract references full-time equivalent hours, see our guide on what FTE means.