A trial shift is a short period of work a candidate does before you decide whether to hire them. In the UK you almost always have to pay for it: if the work is useful to your business, or runs longer than the couple of hours you need to assess someone, that person counts as a worker and is entitled to at least the National Minimum Wage. Unpaid trial shifts are only lawful when they're short, closely supervised, and used purely to test ability, not to fill a gap on a busy service.
This guide is for owners and managers in hospitality, retail, and other shift-based businesses who want to use trial shifts to hire well without falling foul of employment law. It covers when you have to pay, how long a trial can run, and how to structure one that's fair to the candidate and genuinely useful to you.
Are trial shifts legal in the UK?
Yes. No law bans trial shifts, and no law defines them either. They sit in a grey area governed by the National Minimum Wage Act 1998 and the National Minimum Wage Regulations 2015, alongside government guidance last updated in July 2022.
So the real question is never "is a trial shift legal." It's "does this trial shift make the person a worker who has to be paid." If it does and you didn't pay them, that's where the legal risk lands.
Do you have to pay for a trial shift?
Usually, yes. HMRC and employment tribunals judge each case on what actually happened, not on what you called it. The test is whether the trial was genuinely about assessing the candidate, or whether it produced real value for your business.
You almost certainly have to pay at least the National Minimum Wage if:
- The candidate does productive work (serving customers, cooking covers, stocking shelves) that you'd otherwise pay someone to do
- The trial runs longer than the time you reasonably need to assess them (as a rule of thumb, more than a couple of hours)
- They work largely unsupervised, or the tasks don't clearly relate to the job on offer
The government's stated position is blunt: an unpaid trial lasting longer than one day is highly likely to require payment in all but very exceptional circumstances.
Getting this wrong is costly. HMRC can order you to pay the arrears, add a penalty of up to 200% of what's owed (capped at £20,000 per worker), and name your business publicly. In hospitality, where margins are thin and staff are paid at or near the minimum wage, the reputational hit often lands harder than the fine.
How long should a trial shift be?
As short as you need to see whether someone can do the job, and no longer. For most hospitality and retail roles that's a couple of hours: enough to watch how a candidate handles the pace, talks to customers, and works with the team.
The longer the trial, the harder it is to argue it was about assessment rather than free labour. A full shift, a run of shifts, or a "trial week" will nearly always create an entitlement to pay. If you need more than a couple of hours to decide, the cleaner route is to pay for the trial, or to build a short paid probationary period into the actual job.
How to run a trial shift that's fair and useful
A good trial shift tells you something a CV and an interview can't: how the person actually works. To get that, plan it properly.
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Set clear objectives before they arrive. Decide what you're testing (speed under pressure, customer manner, how they take direction, whether they fit the team) and write it down, so you assess everyone against the same things.
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Be upfront about the details. Tell the candidate how long the trial is, whether it's paid, what to wear, what they'll be doing, and when they'll hear back. Clear expectations make for a fairer trial and a better first impression of you as an employer.
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Structure the day. Start with a short introduction to the team and the space. Give them real, representative tasks (taking orders, running food, working the till) with someone alongside to guide and observe. Build in a proper break.
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Watch how they work, not just what they produce. Composure when it gets busy, how they respond to a correction, whether they muck in. A candidate who's calm and coachable often beats one who's technically slick but hard to work with.
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Decide quickly and tell them either way. Give honest feedback and a clear answer within the timeframe you promised. How you treat the people who don't get the job shapes your reputation, and word travels fast in hospitality.
What happens after a good trial shift?
Once you've found the right person, the goal is to get them from "trial went well" to "on the schedule and legally set up" without losing momentum: a signed contract before their first paid shift, their details on file, and a place on the rota.
This is where a good hire can slip away; you've made the decision, but the paperwork drags and they take another offer. Keeping hiring, contracts, and scheduling in one place closes that gap.
Run trial shifts, and everything after, in one place
Shiftbase keeps hiring and scheduling connected, so a good trial shift turns into a working team member without the admin scramble. Slot trials into your rota with employee scheduling, and if you're paying for the trial, capture the exact hours with time tracking so the payment is accurate and audit-ready. Handle the last-minute cover and time off that come with any shift-based team through absence management; all on one platform built for the industries we serve, from hospitality to retail.
See what's included on the pricing page, or try Shiftbase free for 14 days — no credit card needed.
