Shift workers are entitled to 5.6 weeks of paid annual leave per year, capped at 28 days. The cleanest way to calculate it is to take the average number of shifts worked per week, multiply by 5.6, and you have the annual entitlement in shifts. For a 4-on-4-off rota that is 3.5 shifts × 5.6 = 19.6 shifts per year. For variable shift lengths, calculate in hours instead: average weekly hours × 5.6.
The starting point · 5.6 weeks for everyone
The 5.6-week minimum applies to all UK workers under regulation 13 and 13A of the Working Time Regulations 1998, regardless of working pattern. A full-time five-day Monday-to-Friday worker gets 5.6 × 5 = 28 days. A part-time three-day worker gets 5.6 × 3 = 16.8 days. A shift worker gets 5.6 × the number of shifts in their average working week.
The complication for shift workers is not the 5.6-week figure itself · it is that shift patterns rarely map cleanly to a Monday-to-Friday week. A nurse on a 4-on-4-off rota does not work five days a week or three days a week. A retail manager covering early and late shifts does not have a "normal" daily length. So the question is which unit you should run the calculation in: shifts, hours, or days.
Three ways to express shift worker leave
GOV.UK guidance recognises that legislation does not specifically prescribe a method for shift workers. In practice, employers choose the unit that matches the rota best.
| Method | Best for | Formula |
|---|---|---|
| Shifts | Rotas where every shift is the same length | Average shifts/week × 5.6 |
| Hours | Rotas with mixed shift lengths · most healthcare, retail, hospitality | Average hours/week × 5.6 |
| Days | Mostly avoid · only useful if shifts always cover full calendar days | Average shifts/week × 5.6 (then book whole days) |
Hours is usually the most defensible approach. When a worker books a 12-hour shift off, you deduct 12 hours; when they book an 8-hour shift, you deduct 8. Nobody loses out on either side, and the contract terms remain consistent across the rota.
Why average matters more than headline figures. The "average" in these formulas is the worker's average weekly working time across a representative period · usually a full rota cycle, or a 12-week reference period if the rota is irregular. A 4-on-4-off pattern has an 8-day cycle, so the weekly average is calculated over the cycle, not over an arbitrary calendar week.
Worked examples · the patterns we see most
These are the four UK shift patterns we get asked about most. The maths is the same in each case · only the inputs change.
3.5 shifts/week × 5.6 = 19.6 shifts
Or: 42 hrs/week × 5.6 =
3 shifts/week × 12.5 hrs = 37.5 hrs/week
37.5 × 5.6 =
Average 32 hrs/week (12-week reference)
32 × 5.6 =
5 shifts/week × 8 hrs = 40 hrs/week
40 × 5.6 = 224 hrs · or 28 days @ 8 hrs
Walking through the 4-on-4-off calculation
This is the pattern that creates the most confusion, so it is worth showing in detail. The cycle is 8 days long: 4 worked, 4 off. Across two cycles (16 days) the worker does 8 shifts. Convert that to a weekly average:
- 8 shifts ÷ 16 days × 7 days/week = 3.5 shifts per week
- 3.5 shifts × 5.6 weeks = 19.6 shifts per year
- If shifts are 12 hours each: 19.6 × 12 = 235.2 hours per year
When the worker books a 12-hour shift off, deduct 12 hours from the 235.2-hour balance. The advantage of running it in hours is that if a shift gets shortened to 10 hours one day (perhaps because of a mid-shift change), only 10 hours come off the balance.
The 28-day cap and how it interacts with shifts
The 5.6-week minimum is capped at 28 days per year as a statutory ceiling. For full-time five-day workers, the cap and the 5.6-week figure produce the same answer (28 days), so the cap is invisible. For shift workers the cap can either be irrelevant or can clip the entitlement, depending on the rota.
Take a worker averaging 4 shifts per week: 4 × 5.6 = 22.4 shifts. The 28-day cap does not bite because 22.4 is below it. Take a worker averaging 6 shifts per week: 6 × 5.6 = 33.6 shifts, but the cap means they are entitled to no more than 28 statutory days. Few rotas average above 5 shifts per week, but they exist · particularly in healthcare bank work or split shift environments.
Convert the cap into the same unit as the entitlement. If you are calculating in hours and the cap matters, convert 28 days into hours using the worker's normal shift length. For someone on 12-hour shifts, the cap in hours is 28 × 12 = 336 hours. For someone on 8-hour shifts, it is 28 × 8 = 224 hours.
Holiday pay when shift premiums apply
Many shift environments pay enhanced rates for unsociable hours · night shifts, weekends, bank holidays. Where these premiums are part of the worker's normal pay, they must be reflected in the holiday pay calculation, at least for the four weeks of EU-derived leave (regulation 13). The 1.6 weeks of UK-specific leave (regulation 13A) can technically be paid at basic rate, although for fairness many employers apply normal pay across all 5.6 weeks.
"Normal pay" includes:
- Regular shift premiums (e.g. night rate)
- Commission and bonuses intrinsically linked to performing the work
- Other regularly paid overtime
- Length of service or qualification-related payments
The reference period for averaging this pay is the previous 52 paid weeks (going back up to 104 weeks if there are unpaid weeks within the 52). For shift workers whose pattern includes regular night work, this almost always pulls the holiday rate above basic. Our companion article on how UK holiday pay is calculated covers the reference period rules in more detail.
Bank holidays for shift workers
There is no statutory right to bank holidays off in the UK. For shift workers in industries that operate every day · hospitals, restaurants, retail, transport, manufacturing · this is more relevant than for office staff. The contract should be explicit about whether bank holidays:
- Are part of the 28-day cap (so working them does not earn extra leave)
- Sit on top of the 28 days as additional contractual entitlement
- Attract a shift premium when worked
- Earn time off in lieu when worked
For a current schedule of which bank holidays apply across the four UK nations in 2026 and 2027, see our UK bank holidays guide. The dates differ between England & Wales, Scotland and Northern Ireland, which matters for shift environments operating across multiple regions.
How to track shift-based leave without losing your mind
The administrative challenge for shift work is that paper forms and spreadsheets do not naturally handle "deduct 12 hours" the way they handle "deduct 1 day". Three approaches that work:
Set the allowance in hours, not days
If you are tracking in hours, give every shift worker a balance in hours. When they request leave, the system (or the form) records the actual hours of the shift coming off. A 12-hour shift off costs 12 hours; an 8-hour shift off costs 8.
Use the actual shift length, not a notional 8-hour day
The most common error is to set up an hourly balance but then deduct a notional 7.5 or 8 hours regardless of shift length. This shortchanges workers who book longer shifts off and overpays those who book shorter ones. Always use the actual scheduled shift length.
Make the balance visible to the worker every time they request leave
Shift workers in particular benefit from seeing the running balance before they book. The conversation "I have 65 hours left, that's 5 long shifts or 8 short ones" works only if the number is in front of them at the point of decision.
Half-days vs half-shifts. If you offer half-day bookings, decide upfront whether "half" means half a calendar day or half a shift. For a 12-hour worker, those are very different things. Most leave systems handle half-day bookings cleanly; handling "half-shift" bookings usually requires going to hours-based tracking.
Three common mistakes
- Using a notional 8-hour day for everyone. Treating all shift workers as if they work an 8-hour day means the maths breaks for anyone on 10s, 12s or split shifts. Always run the calculation in their actual average hours per week.
- Excluding shift premiums from holiday pay. If a worker normally earns night-shift premiums, those have to feed into the holiday pay rate for the four weeks of EU-derived leave. Paying basic rate only is a likely unlawful deduction.
- Forgetting the 28-day cap on the high-shift end. For workers on rotas averaging more than five shifts per week, the cap clips the entitlement at 28 days. Anything above that must come from contractual rather than statutory entitlement.
The same principles apply to anyone whose hours vary across the year. Our guide on calculating holiday pay for irregular hours workers covers the post-April 2024 12.07% method, which sometimes applies in shift environments where hours genuinely vary pay-period to pay-period.
Sources
| Source | What it covers |
|---|---|
|
GOV.UK
|
The Government's primary guidance on calculating leave for shift workers, including worked examples for the shifts-per-week method and the 28-day cap. |
|
ACAS
|
The 52-week reference period rules for averaging weekly pay, including for workers whose pay varies because of shift premiums or hours. |
|
nidirect
|
The official Northern Ireland guidance on the 5.6-week rule and how it applies to shift, casual and irregular hours workers. |
|
nibusinessinfo.co.uk · Invest NI
|
Worked examples for shift patterns, annualised hours, and compressed working weeks from the official Northern Ireland business support body. |
|
legislation.gov.uk
|
The underlying statute · regulations 13 and 13A set the 5.6-week entitlement and the 28-day cap. |
Frequently asked questions
Shift workers are entitled to the same statutory minimum of 5.6 weeks paid annual leave each year as any other UK worker. The simplest way to calculate it is in shifts: take the average number of shifts worked per week, multiply by 5.6, and that is the annual entitlement in shifts. For someone working a 4-on-4-off pattern, the average is 3.5 shifts per week, giving 5.6 × 3.5 = 19.6 shifts a year. The 28-day statutory cap on the legal maximum still applies, although employers can offer more contractually.
On a 4-on-4-off pattern, the worker is on shift for half the days in the cycle. Across a 7-day week, that averages out to 3.5 shifts per week. Multiplying by 5.6 gives 19.6 shifts of paid leave per year. If those shifts are 12 hours each, the entitlement in hours is 235.2 (3.5 × 12 × 5.6 simplifies to 19.6 × 12). When the worker books holiday, deduct the actual length of the shift they would have worked from the balance, not a generic 8-hour day.
The 5.6-week statutory minimum is capped at 28 days per year. For most full-time five-day workers this works out neatly: 5.6 × 5 = 28. For shift workers on shorter average weeks the 5.6 multiplier produces less than 28, so the cap does not bite. For shift workers averaging more than five shifts per week the cap kicks in, although in practice few rotas hit that figure. The cap is on the statutory floor only · contracts can give more.
Hours is usually the cleanest approach for shift workers because shift lengths often vary across a rota. Calculating in hours means a 12-hour shift booked off costs 12 hours from the balance and an 8-hour shift costs 8 hours · the worker is treated fairly regardless of which shift they take off. Shifts work well only if every shift is the same length. Days is the worst option for shift work because a calendar day rarely maps cleanly to a shift.
There is no statutory right to bank holidays off in the UK. Whether shift workers get them off, get paid extra to work them, or have them rolled into the 5.6-week entitlement depends entirely on the contract. Many shift industries (healthcare, hospitality, retail, manufacturing) operate every day of the year, so working bank holidays is part of the rota. The contract should be explicit about whether bank holiday working attracts a premium rate, time off in lieu, or just normal pay.
If the worker normally receives shift premiums (for example, an extra rate for night shifts or weekends), those payments must be reflected in their holiday pay for the four weeks of EU-derived leave. The 52-week reference period is used to average out their normal weekly pay including premiums. The remaining 1.6 weeks of UK statutory leave can be paid at basic rate, although many employers pay normal pay across the full 5.6 weeks for simplicity and fairness.
This is not legal advice. Shift work generates a lot of edge cases, particularly where premium pay or atypical patterns are involved. For specific situations, especially where back-pay or rota changes are in dispute, get professional advice. ACAS offers a free helpline on 0300 123 1100 for general queries.