NHS Annual Leave Entitlement Explained

Annual leave is one of the more confusing parts of an NHS contract to explain simply, because it isn't a single flat number — it depends on how long you've worked in the NHS, how many hours you're contracted to work each week, and sometimes on the specific policy your trust has adopted locally. This guide walks through how the system is generally understood to work conceptually, where genuine confusion commonly arises (particularly for part-time staff and new starters), and points you to a calculator that will do the pro-rata maths for your own numbers.

The service-tiered system, conceptually

Section 13 of the NHS Agenda for Change Terms and Conditions of Service Handbook sets out annual leave as a tiered entitlement: staff earlier in their NHS career get a base number of days, and that base rises at set length-of-service milestones. The figures most commonly cited for a full-time (37.5 hours a week) member of staff are:

On top of whichever base figure applies, most staff also receive a separate bank/public holiday entitlement, commonly cited as around 8 days a year for full-time staff, which is either added to your total or taken as the actual bank holiday date off (or time off in lieu, if you're rostered to work it) depending on how your trust and rota handle it.

How part-time leave is actually calculated

This is the point that trips up the most people, because the intuitive assumption — "I work three days a week, so I must get three-fifths of the full-time day count" — isn't quite how it's generally applied, and can under- or overstate your real entitlement depending on your specific working pattern.

The more accurate way to think about it is that your entitlement is pro-rated against a full-time 37.5-hour week, based on your contracted hours, and then the result is expressed in whatever unit (days or hours) makes sense for how you actually work. For someone with a simple, even working pattern (say, three full 7.5-hour days a week), pro-rating by hours and pro-rating by days tend to land close to the same place. But for anyone with a less even pattern — several short shifts, an irregular rota, or hours that don't divide neatly into whole days — calculating in hours rather than days is the more reliable approach, because a "day" simply isn't a fixed, comparable unit once your daily hours vary.

Concretely: take the full-time base-day figure for your service tier, multiply it by your pro-rata fraction (your contracted weekly hours divided by 37.5), and you get your pro-rated base days. Do the same with the bank holiday figure if it's added separately. The NHS Annual Leave Calculator does exactly this calculation for you — enter your years of service and contracted hours, and it shows both the pro-rated day figure and the equivalent in hours.

Why the day-count alone isn't always the fairest comparison

Because part-time staff often work shifts of a different length to their full-time colleagues (a short shift, a long shift, or a mix), comparing entitlement purely in "days" can be misleading. Someone contracted to four 5-hour shifts a week and someone contracted to two long 12-hour shifts a week might both be working roughly the same total weekly hours, but a leave policy expressed only in "days" could treat them quite differently depending on how a "day" is defined for each of them locally. This is exactly why many trusts, and the calculator on this site, express the result in hours as well as days — it's a genuinely more useful figure for anyone whose working pattern isn't a simple, even number of full days each week.

Your NHS leave year probably doesn't run on your anniversary

A surprisingly common point of confusion for new starters is assuming their annual leave entitlement resets on the anniversary of their start date, the way some non-NHS employers handle it. In practice, most NHS trusts run their annual leave year on a fixed 1 April to 31 March cycle, the same for every member of staff regardless of when they individually joined — this is commonly the case, though it's worth checking your own trust's specific policy rather than assuming it applies everywhere, since local variations do exist.

This matters most in your first year. If you join partway through a trust's leave year (say, in November, with the leave year running to the following March), your entitlement for that first partial year is normally pro-rated for the months remaining, not the full annual figure — so it's worth asking your line manager or HR exactly how many days you're entitled to before your first full leave year begins, rather than assuming the full-year number applies straight away.

What "years of service" generally means for leave purposes

Moving up a service tier generally depends on continuous NHS service, which in many cases can include time spent with a previous NHS employer if your employment transferred without a disqualifying break in service — often referred to as maintaining "continuous service" when moving between NHS trusts. The specific rules for what counts, and what constitutes a disqualifying break, can vary and are set out in your trust's policy and the wider NHS terms, so if you've moved between NHS employers and are unsure whether your prior service counts towards your leave tier, it's worth checking directly with your new trust's HR team rather than assuming either way.

Requesting leave, and what happens to it when you leave your trust

Knowing your entitlement is only half the picture — how you actually book it, and what happens to any of it you haven't used if you move on, matter just as much in practice.

• • Notice and approval aren't automatic — leave requests are generally subject to manager approval based on service needs, and busy periods (bank holidays, known seasonal pressures, or several colleagues requesting the same dates) can mean a request is refused or asked to be rescheduled, so book ahead where you can rather than assuming late requests will be approved
• • You can usually book in hours as well as whole days — particularly useful if your shift lengths vary, since booking a single long shift off as 'one day' can understate the actual leave it uses compared to a short one; the same hours-based logic that makes part-time pro-rating fairer applies here too
• • Unused leave is generally paid out, not lost, when you leave — if you resign or move to a different trust, you're normally entitled to be paid in lieu for any annual leave accrued but not yet taken by your last day, calculated pro-rata for the part of the leave year you worked (and, conversely, an amount may be deducted if you've taken more than you'd accrued)
• • NHS annual leave sits above the UK statutory floor — even the entry-level tier is designed to exceed the minimum paid leave every UK employee is legally guaranteed under the Working Time Regulations, which is a useful baseline to know if you're ever comparing an NHS role against a job outside the health service. See our NHS Working Time Rules guide for how those wider protections work alongside your leave entitlement.

If you are leaving, our free NHS Leaver's Final Pay Checker works out the leave you have accrued to your last day and what is owed to you as pay.

Some trusts also run local schemes to buy or sell leave, explained in our guide to buying and selling annual leave in the NHS.