How overtime works in the United Kingdom

In the UK, the core statute governing working time is the Working Time Regulations 1998(the “WTR”, SI 1998/1833), which implement the EU Working Time Directive into UK law. It is essential to understand what the WTR does and does not regulate: it sets limits on how long people may work — a weekly average cap, rest periods, and breaks — to protect health and safety. It says nothing about a premium rate for the hours worked within or beyond those limits.

The core limits every UK employer must respect:

If you are arriving from a country with a national overtime multiplier, this is the single most important sentence in this guide: UK law mandates no statutory overtime premium at all. There is no legal “time-and-a-half”, no statutory 25% or 50% loading for working extra hours. Employers do not have to pay workers for overtime at any special rate — the WTR limits how much you may work (on average) and how much rest you are owed; it does not set a higher rate for the hours you do work.

Whether overtime is paid at all, and at what rate, is a matter of what the employment contract or a collective agreement says — not the statute book. Two employers in the same city, same industry, can lawfully pay very different overtime — or none at all.

Because there is no statutory floor for a premium, the numbers come from the contractual layer. In practice a UK overtime premium is set by one of:

There is one genuine statutory floor in play, but it is a floor on average pay across all hours worked, not on the premium: your average hourly pay for the total hours worked in a pay period — including any unpaid or under-paid overtime — must not fall below the National Minimum Wage (or the National Living Wage for workers aged 21 and over), set under the National Minimum Wage Act 1998 and the National Minimum Wage Regulations 2015. The rate rises on 1 April each year, so cite the current schedule rather than a single figure that goes stale:

Because there is no statutory premium to tabulate, this worked example works differently: the real constraints are the WTR rest and averagingrules, and any pay premium is whatever this employee's contract happens to say. Take a week where someone works long days on a contract that sets a conventional time-and-a-quarter (+25%) premium for hours beyond an agreed 40-hour week. The 25% here is illustrative and contractual — not a statutory rate.

The week totals 50 hours— over the 48-hour limit on its own. But reg. 4's limit is an average over a 17-week reference period, not a hard weekly ceiling, so this single week is lawful only if either the worker has a valid, voluntary written opt-out agreement on file (reg. 5), or the other weeks in the 17-week window run low enough that the rolling average stays at or under 48 hours. That averaging test — not a pay rate — is the real legal constraint.

On this employee's contract, 40 hours are ordinary and the 10 hours beyond 40 attract the conventional +25% premium. Nothing in the statute produced that 25% — the contract did:

Because UK overtime premiums are contractual rather than statutory, In A Tick does not ship a fixed UK rate set — there is no built-in UK ruleset in the product today. Instead you configure your own premiums — whatever your contracts or collective agreement set — as custom region rules, and the overtime calculation engine buckets and stacks them deterministically. The same timesheet always produces the same result: pay is never left to guesswork or to AI.

What In A Tick enforces regardless of what your premiums are: accurate capture of the hours actually worked from real clock times, a complete audit trail of how every figure was reached, and a deterministic, payroll-ready calculation you can hand to whoever runs pay. Those matter even where the law sets no premium floor — the numbers still have to be right, and defensible. We expect to help teams track the WTR's 48-hour averaging and rest entitlements themselves down the line.