Apprenticeships and part-time hours often go hand in hand. Many apprentices work fewer than full-time hours because of college days, study blocks, or simply because the role itself is part-time. That is where “pro rata” comes in — and it is also where pay mistakes quietly creep in. Employers sometimes get the hourly rate right but the hours wrong, forget to pay training time, or miss the pay rise an apprentice is owed part-way through their programme.
This guide explains exactly how pro rata pay works for apprentices in the UK: the minimum wage rules, what counts as working time, the worked calculations, and the payroll errors worth watching for. The principle underneath it all is simple — pro rata means proportionate. A part-time apprentice should get the same hourly rate as a full-time one; the total is just scaled to the hours worked.
How the apprentice minimum wage actually works
The apprentice rate is its own band of the National Minimum Wage. From April 2026 it is £8.00 an hour, and it applies to you if you are:
- under 19 (whatever year of the apprenticeship you are in), or
- 19 or over and in the first year of your apprenticeship.
Once you are 19 or over and past the first year, you move onto the age-related rate instead: £7.55 for 16–17, £10.85 for 18–20, and £12.71 (the National Living Wage) for 21 and over. Those bands apply from the same April 2026 uprating.
One important guardrail: the apprentice rate only applies to someone on a genuine apprenticeship — a recognised apprenticeship agreement with a training plan and off-the-job learning. An employer cannot simply label an ordinary trainee or intern an “apprentice” to pay the lower rate. If there is no real apprenticeship agreement in place, the age rate applies from day one.
Worked example 1 — a 17-year-old apprentice on 30 hours a week
Take an apprentice aged 17, working 30 hours a week at the £8.00 apprentice rate:
- Weekly gross: 30 × £8.00 = £240.00
- Annual gross: £240 × 52 = £12,480
Now compare a full-time apprentice at the same employer doing 37.5 hours at the same rate: 37.5 × £8.00 = £300 a week, or £15,600 a year. The part-timer’s £240 is exactly 80% of £300 — because 30 ÷ 37.5 = 0.8. Same hourly rate, total scaled to hours. That is pro rata doing its job properly.
“Pro rata” never means a cheaper hourly rate
This is the single most common misunderstanding. Pro rata adjusts the total pay to reflect the hours worked — it never justifies cutting the rate. An apprentice on 20 hours a week must earn the same pounds-per-hour as an apprentice on 37.5 hours in an equivalent role. If the hourly figure drops when the hours drop, that is not pro rata; it is underpayment.
The standard calculation runs like this:
(Your contracted hours ÷ full-time hours) × full-time annual salary = your pro rata salary
Say a vacancy advertises “£15,600 per year (37.5 hours per week)” for a first-year apprentice. For a 25-hour-a-week contract at the same rate:
- 25 ÷ 37.5 = 0.6667
- £15,600 × 0.6667 = £10,400 a year
- Weekly: £10,400 ÷ 52 = £200
- Hourly check: £200 ÷ 25 = £8.00 — the rate holds.
Running that last hourly check is a good habit. Whenever you are given an annual or monthly figure, divide it back down to the hour and compare it with the rate you should be on. It takes ten seconds and catches a surprising number of errors.
Off-the-job training is paid working time
Every apprenticeship must include at least 20% off-the-job training — college days, e-learning modules, shadowing, mentoring sessions, and time spent on assignments. Here is the part some employers get wrong: all of that training time counts as working time and must be paid at your normal rate.
Training should normally happen within your paid hours. If your college day falls outside your usual shift pattern, those hours still have to be paid — and if they push you over your contracted hours, overtime rules apply. An employer who pays you for the 30 hours you spend on the shop floor but not the 7.5 hours you spend at college is underpaying you by a fifth of your wages.
Worked example 2 — training hours included properly
An 18-year-old first-year apprentice has a 37.5-hour week: 30 hours on the job plus 7.5 hours at college on Fridays.
- Paid hours: 37.5 (all of them — job and college alike)
- Weekly gross: 37.5 × £8.00 = £300.00
If the employer only paid the 30 “working” hours, the apprentice would get £240 — a shortfall of £60 a week, or £3,120 over a year. Training time is not a favour the employer does you; it is part of the job you are paid for.
Turning 19 and finishing year one: the pay uplift
The apprentice rate has an expiry date, and it catches people out because it depends on two conditions, not one. You leave the apprentice rate only when you are both aged 19 or over and past the first 12 months of the apprenticeship. In plain terms:
- 17, first year → apprentice rate (£8.00)
- 18, second year → still the apprentice rate (£8.00) — under 19, so the age condition has not been met
- 19, first year → still the apprentice rate (£8.00) — in the first year, so the time condition has not been met
- 19, second year → moves to the 18–20 rate (£10.85)
- 21+, second year → moves to the National Living Wage (£12.71)
The uplift applies from the pay reference period in which the change happens — the employer should not wait until the next convenient payroll run. If they miss it, the difference is backpay you are owed.
Worked example 3 — the uplift in numbers
An apprentice starts at 18 on a 35-hour week at £8.00: 35 × £8.00 = £280 a week. They turn 19 in month 8 — no change yet, because they are still in year one. At the 12-month anniversary, now 19 and past the first year, they move to the 18–20 rate of £10.85:
- 35 × £10.85 = £379.75 a week
- Increase: £99.75 a week, or about £5,187 a year
That is a jump of more than a third, which is exactly why it is worth diary-noting both your 19th birthday and your apprenticeship anniversary. If either passes without a pay change, query it in writing.
Common payroll mistakes to watch for
- Labelling a regular employee an “apprentice”. Without a genuine apprenticeship agreement and training plan, the apprentice rate is unlawful — the age rate applies.
- Missing the uplift. The move off the apprentice rate at 19-plus-one-year is the most frequently missed pay rise in apprentice payroll.
- Excluding training and college hours. As shown above, this quietly wipes out a fifth of pay.
- Deductions that drag pay below the minimum. Charges for training costs, tools, or uniforms cannot take your effective hourly rate below the legal minimum. If they do, the employer must make up the difference.
- Unpaid “trial” or induction hours. Time spent in induction, onboarding, or a working trial counts as working time and must be paid.
- Rounding hours down. Fifteen minutes shaved off each shift adds up to real money over a year — keep your own record of hours worked.
Check your own figures in seconds
If you want to sense-check what your part-time hours should be worth against a full-time salary, a free pro rata salary calculator does the arithmetic for you — enter the full-time salary and the two sets of hours, and it returns the proportionate figure. It is a quick way to confirm your payslip before you raise anything with payroll.
Frequently asked questions
Can an apprentice work part-time?
Yes. There is no minimum-hours rule for apprenticeships in the same way as some other schemes — what matters is that the apprenticeship agreement, training plan, and off-the-job training requirement are all in place. Part-time apprentices simply have their pay (and their programme length, usually) scaled to their hours.
Is the apprentice rate lower than the under-18 minimum wage?
From April 2026, no — the apprentice rate (£8.00) is slightly above the 16–17 rate (£7.55). That was not always the case historically, which is where the confusion comes from. Either way, an employer can always choose to pay more than the legal minimum.
Do unpaid lunch breaks count towards my paid hours?
No. Genuine rest breaks where you are free to leave and do as you please do not count as working time. But if you are expected to stay on-site, answer phones, or remain available during “lunch”, that is working time and it should be paid.
What should I do if my employer will not apply the uplift?
Raise it in writing first, quoting your start date and the date the uplift was due, and keep copies of your payslips. If that goes nowhere, you can report underpayment to HMRC, which enforces the minimum wage, or contact Acas for free advice. Do not resign in frustration before taking advice — you have legal protections here.
Does working part-time reduce my holiday entitlement?
Your holiday is pro rata too, but on the same fair basis: the statutory minimum is 5.6 weeks a year for full-time staff, scaled to your hours. A 3-day-a-week apprentice gets 3/5 of the full-time allowance — the daily rate of holiday pay stays the same.