The UK's leave system has three things worth knowing up front: the paid annual leave is generous and calculated in an unusual way, the family leaves are long but mostly paid at a modest flat rate, and the system is in the middle of a real expansion, with the Employment Rights Act 2025 turning several leaves into day-one rights. Whether you are a worker checking what you are owed or an employer working out your obligations, the clearest way to take it in is in three groups: the annual holiday, the family leaves, and the newer or shorter statutory leaves, with a note throughout on what changes in April 2026. Let me walk through them.
Annual leave: 5.6 weeks, calculated the British way
Every worker in the UK is entitled to 5.6 weeks of paid annual leave a year. For someone working five days a week that is 28 days, and here is the first quirk: those 28 days can include the eight public bank holidays. Unlike most countries, UK bank holidays are not a separate statutory entitlement on top of annual leave; an employer can count them toward the 5.6 weeks, though many choose to give them on top as a matter of policy. Part-time workers get the same 5.6 weeks pro-rated to their working pattern.
The calculation gets genuinely complicated for anyone whose hours are not regular. Holiday for irregular-hours and part-year workers is worked out at 12.07 percent of hours worked, a figure that comes straight from 5.6 weeks as a proportion of the working year, and holiday pay itself is averaged over a 52-week reference period rather than just basic salary, so regular overtime and commission have to be folded in. This is the most error-prone part of UK holiday, because both the entitlement and the pay have to be recalculated from each worker's actual hours and earnings rather than applied as one flat figure.
Family leave: long, but mostly flat-rate
The UK's family leaves are among the longest in Europe by duration, but the pay behind them is modest, and that gap between length and pay is the thing to understand.
Statutory Maternity Leave runs up to 52 weeks: 26 weeks of ordinary leave and 26 of additional. Statutory Maternity Pay covers 39 of those weeks, at 90 percent of average earnings for the first six weeks and then a flat weekly rate for the remaining 33, which for 2026-27 is around GBP 194 a week. So a mother can take a full year, but the paid portion is nine months and most of it is at a flat rate well below a typical salary. The employer pays SMP but reclaims the large majority of it from HMRC, which is a key point for cost: statutory family pay is mostly recovered, not borne in full.
Around that are the other family leaves. Statutory Paternity Leave is two weeks at the same flat rate. Statutory Adoption Leave mirrors maternity at up to 52 weeks. Shared Parental Leave lets parents divide up to 50 weeks of leave and 37 weeks of pay between them, which is flexible but famously complicated to administer. And there is unpaid Parental Leave of 18 weeks per child up to a limit each year, which is separate from all of the above. Two of these changed on 6 April 2026 under the Employment Rights Act 2025: paternity leave and unpaid parental leave are now day-one rights, which removed the previous service qualifications, so a worker no longer has to have been employed for months before qualifying.
The newer and shorter leaves
The UK has been steadily adding targeted leaves, and this is where the system is most in motion. Neonatal Care Leave, which launched in April 2025, gives parents up to 12 weeks of leave when a baby needs neonatal care, on top of the other family leaves, with statutory pay for those who qualify. Carer's Leave, introduced in 2024, provides one week of unpaid leave a year to care for a dependant with long-term needs. Parental Bereavement Leave, often called Jack's Law, gives two weeks to parents who lose a child, and the Employment Rights Act 2025 extends bereavement leave more broadly from 2027 to cover the loss of a close relative. And there is the long-standing right to reasonable unpaid time off to deal with emergencies involving a dependant.
Sick leave, and the April 2026 change that matters most
Statutory Sick Pay is where the biggest recent change comes. SSP is a flat weekly amount, around GBP 123 a week for 2026-27, and it used to start only after three waiting days and only for workers earning above a lower earnings limit. Since 6 April 2026, under the Employment Rights Act 2025, that has changed in two important ways: the three waiting days are abolished, so SSP is payable from the first day of sickness, and the lower earnings limit is removed, so all employees qualify regardless of how little they earn (the lowest earners now receive 80 percent of their average weekly earnings where that is less than the flat rate). For payroll, this is a real shift, because sick pay used to start on day four for higher earners and now applies from day one for everyone, which changes both the cost and the calculation on short absences that previously fell outside SSP entirely.
What this means for workers and employers
Three points stand out. First, annual leave is generous, but for irregular-hours workers the 12.07 percent method and the 52-week pay averaging make the entitlement and the pay harder to calculate than a flat number of days. Second, family leave is long but the pay is mostly a flat statutory rate, and the employer reclaims most of the statutory family pay from HMRC, so the length of the leave and its cost to the employer are very different numbers. Third, the system expanded in April 2026: SSP from day one with no earnings floor, and paternity and parental leave as day-one rights, under the Employment Rights Act 2025.
The April 2026 change is the most consequential. Previously, a worker had to complete a qualifying period of employment, and in the case of SSP to earn above a minimum weekly amount, before becoming entitled to some of these leaves and to sick pay. Since 6 April 2026 those service and earnings conditions are removed, so more workers qualify, and from their first day. For a worker, that means access from day one; for an employer, it means a larger group of eligible staff and a simpler eligibility test. Flux applies the current entitlements, the statutory pay rates, and the HMRC reclaim, and reflects the April 2026 changes, so leave and pay stay correct as the rules change. The concrete things to note are the day-one SSP with no earnings floor and the day-one paternity and parental rights, both in force since 6 April 2026.
Niko Nurmentaus
Product Lead