Overtime has a peculiar quality: almost nobody decides it. It accumulates, a piece at a time, for reasons that each look unavoidable in the moment. Then the month-end figure surprises the same manager who approved it line by line.

It helps to separate two things that always get mixed up: what the rules require, and where the hours actually come from.

What the rules do and do not say

The UK position surprises people who have worked elsewhere in Europe: there is no statutory right to a higher rate for overtime, and no annual cap on overtime hours. Whether extra hours are paid at time and a half, at plain rate or taken as time off in lieu is a matter for the contract.

Three statutory constraints do apply, and they are the ones worth watching:

  • the 48-hour weekly average includes overtime, measured over seventeen weeks, unless the worker has signed an individual opt-out;
  • daily and weekly rest and breaks are unaffected by overtime. No amount of willingness changes the eleven hours between shifts;
  • National Minimum Wage must be met across the hours actually worked. Unpaid extra time can quietly drag an hourly rate below the floor, which is a genuine liability rather than a technicality.

This article is practical orientation rather than legal advice. Your contracts and any collective agreement govern rates and time off in lieu, and they come first.

Outside the UK

Elsewhere the picture is more prescriptive. Italy allows up to 250 overtime hours a year where no collective agreement sets a different limit, requires overtime to be counted separately and specifically compensated at contractual premium rates. Spain caps overtime at 80 hours a year, with the significant twist that hours compensated by time off within four months do not count against that limit, and bars night workers from overtime altogether. The reasoning on the shared 48-hour ceiling is in how many hours can you work per week.

Where overtime actually comes from

In the vast majority of businesses it is not many different causes, it is the same three in varying proportions.

Coverage planned to the bone. When the rota schedules exactly the number of people needed in each slot with no margin, any surprise turns into overtime. Margin is cheap when planned and expensive when improvised.

Absences covered by extending whoever is already in. It is the instinctive reaction and the most costly one: it lengthens the day of people who were already at the end of their shift. The alternative route (who is off, who is in credit, who is short this week) always exists, it just needs the full picture in front of you. We wrote about it in handling last-minute absences.

Closing overruns. The half hours after the shutter comes down, the ones that rarely get logged, are the most underrated line: small, daily and systematic. Across twenty trading days they are ten hours.

Cutting it without raising your voice

Three concrete moves, in order of effectiveness:

  • measure before you cut. Overtime per person, per weekday and per cause. It nearly always turns out that seventy per cent comes from two recurring days and one site: a planning problem, not a people problem;
  • move the margin to where it is needed instead of spreading it evenly. An extra half hour in the Saturday closing slot is worth more than two hours scattered across Tuesday morning;
  • use time off in lieu where it suits both sides, with a transparent balance. That is exactly the job of an hour bank, which only works when the person earning the balance can see it.

And one rule that sounds obvious and is not: if a week systematically ends in overtime, that week is not badly planned, it is planned with a headcount that does not cover it. Continuing to call it overtime is just a way of postponing the decision.

In Sked Solve each contract's hours are a constraint on generation, and the plan flags the weeks that would end in overtime before they happen. See how it works at Sked Solve.