Overtime rules in the UK are frequently misunderstood by both employees and employers. Unlike in the US, there is no automatic legal right to premium overtime pay in the UK. However, your employer must still ensure overtime hours don't cause your average hourly rate to fall below the National Minimum Wage — and your contract may specify enhanced overtime rates. This guide explains the rules, the calculations, and your rights.
Is Overtime Pay Legally Required in the UK?
Under UK employment law, there is no statutory requirement to pay a premium rate (such as "time and a half" or "double time") for overtime. The key legal requirements are:
- National Minimum Wage (NMW): Your average hourly pay — including overtime — must never fall below NMW. If overtime hours are unpaid or paid at a flat rate, this calculation must still hold.
- Working Time Regulations 1998: Workers cannot be forced to work more than an average of 48 hours per week (averaged over 17 weeks), unless they have voluntarily opted out in writing.
- Contractual terms: If your contract specifies overtime rates, those are binding. Many contracts state enhanced rates (1.25×, 1.5×, or 2×) for overtime or specify that overtime is unpaid (for salaried staff with flexibility clauses).
National Minimum Wage Rates (2024/25)
| Worker Category | Hourly Rate (April 2024) |
|---|---|
| Aged 21 and over (National Living Wage) | £11.44 |
| Aged 18–20 | £8.60 |
| Aged 16–17 | £6.40 |
| Apprentices (under 19, or first year) | £6.40 |
How to Calculate Overtime Pay
Example 1: Hourly Worker at Standard Rate
You earn £14/hour, work 37 regular hours and 5 overtime hours in a week. Overtime is paid at standard rate.
Regular pay: 37 × £14 = £518
Overtime pay: 5 × £14 = £70
Gross weekly pay: £588
Example 2: Hourly Worker at Time and a Half
Same scenario, but your contract states overtime at 1.5× rate:
Regular pay: 37 × £14 = £518
Overtime rate: £14 × 1.5 = £21/hour
Overtime pay: 5 × £21 = £105
Gross weekly pay: £623
Example 3: Salaried Worker — NMW Check
A salaried employee earns £26,000/year (£500/week) for a contracted 40-hour week. They regularly work 50 hours but receive no overtime pay (their contract allows this). Is this NMW compliant?
Average hourly rate = £500 ÷ 50 hours = £10/hour
NMW for 21+ = £11.44
£10 < £11.44 — this is unlawful. The employer must either pay extra or reduce the required hours.
tax">Overtime and Income Tax
Overtime pay is taxed as regular income in the UK — there's no special tax rate. It's added to your total earnings for the year and taxed under PAYE at your marginal rate:
- Up to £12,570 personal allowance: 0%
- £12,571–£50,270: 20% basic rate
- £50,271–£125,140: 40% higher rate
- Above £125,140: 45% additional rate
You also pay National Insurance at 8% (2024/25) on earnings between £12,570 and £50,270 per year.
If your regular earnings are in the basic rate band and overtime pushes you close to £50,270 in a given month, your employer's PAYE calculations will withhold more tax that month — but this self-corrects across the tax year via your P60 and any necessary tax refund.
Common Overtime Pay Arrangements
- Plain/flat time: Overtime paid at the same rate as regular hours — minimum legal requirement if overtime is paid at all
- Time and a quarter (1.25×): Common in retail, hospitality
- Time and a half (1.5×): Common in manufacturing, construction
- Double time (2×): Often applied to Bank Holidays and Sundays in some industries
- Time off in lieu (TOIL): Extra hours are compensated with time off rather than pay — must be agreed contractually
Bank Holidays and Overtime
There is no statutory right in the UK to premium pay for working on Bank Holidays. Your entitlement depends entirely on your contract. Many contracts do provide double time or time and a half for Bank Holiday working — check your terms. The 28 days of statutory annual leave (full-time workers) may or may not include Bank Holidays, depending on your contract wording.
How to Check if You're Being Underpaid
- Calculate your total earnings in a week (regular + overtime)
- Divide by total hours worked (including overtime)
- Compare against NMW for your age group
- If below NMW — you are being underpaid
You can report underpayment to HMRC's National Minimum Wage team online or by calling 0300 123 1100. HMRC investigates all complaints and employers found to be underpaying face penalties of up to 200% of the underpayment.
Summary
UK law doesn't require premium overtime rates — but your average pay including overtime must never fall below NMW (£11.44/hour for 21+). Check your contract for agreed overtime rates. Overtime is taxed as normal income under PAYE. For TOIL arrangements, ensure the substitution rate is clearly agreed in writing. Use our overtime calculator to check gross overtime pay and estimated take-home after tax.