Irregular-hours worker

Start with what the contract requires

For Great Britain holiday rules, the statutory test asks whether paid hours in each pay period are wholly or mostly variable under the contract. Look at the agreed pattern, not just what appeared on the latest rota.

The Acas classification guidance explains that a worker can have changing hours without meeting this definition. A fixed rotating pattern may produce different weekly totals but still be predictable under the agreement.

A casual label does not decide it

“Casual”, “zero hours” and “variable hours” are descriptions, not substitutes for the statutory test. A zero-hours arrangement may qualify, but it is not automatic. Equally, a worker can fall within the definition without using any of those labels.

Check the paid hours promised or expected for every pay period. Keep the contract, pay frequency and actual hours together so the classification can be explained if the working arrangement changes.

Why the classification matters

Qualifying irregular-hours workers have specific Great Britain rules for holiday accrual and pay. Rolled-up holiday pay may also be available as an optional payment method when its requirements are met. The label does not remove the worker's right to take leave.

Northern Ireland does not use this post-2024 Great Britain classification and method. Apply Northern Ireland holiday guidance to an NI worker. HollyHR's current holiday calculator covers documented regular weekly patterns, not irregular-hours workers.