A 17-year-old temp: the 8-hour day, the 40-hour week, the 30-minute break, and two clients added together

A café client asks for a 17-year-old on full-time shifts. The desk assumes the adult rules apply, with a 20-minute break after 6 hours and an opt-out available for long weeks. The Working Time Regulations 1998 treat workers aged 15 to 17 differently, with a lower cap, a longer break and more rest. This guide tests five rotas against the cap and shows how two clients can push a temp over it.

What the regulations say

The wording below is from legislation.gov.uk, read today.

• Who counts. A "young worker" has attained the age of 15 but not 18 and is past compulsory school age (regulation 2).
• The cap. Working time must not exceed 8 hours a day or 40 hours a week (regulation 5A). The employer must take all reasonable steps to ensure it. A week starts at midnight between Sunday and Monday.
• More than one employer. Hours for each employer are added together on the day and in the week (regulation 5A).
• Break. If daily working time is more than 4.5 hours, a break of at least 30 minutes, consecutive if possible. Hours for several employers are added together to decide whether 4.5 is passed (regulation 12(4) and (5)). The adult break is 20 minutes after 6 hours (regulation 12(1)).
• Daily rest. 12 consecutive hours, against 11 for an adult. It may be interrupted for work split up over the day or of short duration (regulation 10).
• Weekly rest. 48 hours in each seven-day period, against 24 for an adult. It may be reduced for technical or organisational reasons but never below 36 consecutive hours (regulation 11).

Five rotas against the cap

I treat the hours below as working time, not counting the unpaid break. The text I read does not define working time for this purpose, so check that before you rely on it.

Checked twice: 5 x 8 = 40; 5 x 8.5 = 42.5, and 42.5 - 40 = 2.5; 4 x 10 = 40, and 10 - 8 = 2; 6 x 6.5 = 39; 6 x 7 = 42, and 42 - 40 = 2.

What it shows:

• Four tens fail. A compressed week that is fine for an adult breaks the daily cap by 2 hours on each of four days, even though the week is exactly 40.
• Half an hour matters. A 9-to-5.30 shift is 8.5 hours of working time, so five of them is 42.5.
• Six short days pass on hours. They then run into the weekly rest, below.

Two clients, one temp

The cap follows the young worker, not the placement. Say a 17-year-old does 5 days of 5 hours for one client (5 x 5 = 25 hours) and 2 weekend days of 8 hours for another (2 x 8 = 16 hours). Neither client is over 40, and no day is over 8. Together the week is 25 + 16 = 41, one hour over.

The same adding together applies to the break. A 3-hour morning shift for one client and a 2-hour afternoon shift for another make 5 hours in a day, which is more than 4.5, so a 30-minute break is owed even though neither shift alone reaches it.

The weekly rest on a six-day rota

Take a temp who finishes at 18:00 on Saturday and restarts at 08:00 on Monday. The rest is 6 hours to midnight, 24 hours on Sunday and 8 hours on Monday morning: 6 + 24 + 8 = 38 hours. That is short of 48 and above 36. The regulations allow a reduction only for technical or organisational reasons, so a plain preference for six days is not enough on the text I read. A five-day rota with two consecutive days off leaves nothing to argue about.

What this means on the desk

• Ask the date of birth first. Compare it with 18, and check that the person is past compulsory school age. Record that you checked.
• Ask what else the temp is doing. A second job, or a second placement through you or another agency, goes into the same 8 and 40. Put the question on the registration form and ask again at each new booking.
• Cap the booking by the person, not the shift. Add the new client's hours to the hours already booked for that temp in the same week before you confirm.
• Build the 30-minute break into the rota for any day over 4.5 hours.
• Cost it. A young worker on a shorter week changes the margin; run the figures through the temp margin calculator. The adult versions of these rules are in the 48-hour week guide and the rest breaks and rota guide, and the night limits for under-18s in the night worker guide.

What I did not read

I did not read the exceptions in regulation 27A, any guidance on who is the employer for working time when a temp is supplied through an agency, or GOV.UK's young worker pages, whose addresses returned 404 when I tried them. The rotas above are tests of the text I read, not a ruling on a particular placement. Confirm the exceptions before you rely on a rota that sits near a line.

Overlyft builds AI staff who join your placements team and, when a booking comes in for a young temp, total the week across every client you have booked them with, flag any day over 8 hours or week over 40 and draft the break and rest check, all queued for a person to approve.

This is general information, not legal or payroll advice. Check legislation.gov.uk and the Working Time Regulations 1998 before you rely on a rota.