Zero-hours and casual work in Ireland
Reviewed by Mellow Editorial Team, HR & payroll content team
Zero-hours contracts and casual work arrangements are legal in Ireland but subject to specific statutory protections that limit how they can be used. Employers need to understand those rules before engaging workers on flexible or as-needed terms.
What zero-hours and casual work actually mean
A zero-hours contract formally obliges a worker to be available for work without guaranteeing any minimum hours. Under Irish law, these are significantly restricted. The Employment (Miscellaneous Provisions) Act 2018 effectively prohibits zero-hours contracts for regular and ongoing work — you cannot use them where the work is predictable and continuous.
Casual or variable-hours work is different. A worker may have no set hours but is under no obligation to accept work when offered. Neither party has a firm commitment. This arrangement is more defensible legally, but it comes with its own obligations once a pattern of work develops.
The key practical distinction: if someone consistently works a similar number of hours each week over a period of time, the law increasingly treats them as a worker with established, predictable hours — regardless of what the contract says.
The banded hours entitlement
The 2018 Act introduced a right for employees to request a band of hours that reflects their actual average hours worked. If an employee has worked for an employer for at least 12 months and their contracted hours no longer reflect reality, they can request to be placed in an appropriate band.
Bands run from 3–6 hours per week at the lower end up to 35 or more hours at the top. An employer can refuse a request on limited grounds — such as the hours worked being caused by a temporary situation — but a blanket refusal is not permitted. Disputes can be referred to the Workplace Relations Commission (WRC).
This means that even if you genuinely need flexible staffing, you should track actual hours carefully. If someone is regularly working 20 hours a week, their contract should reflect something close to that over time.
Minimum payment obligations
If a worker is genuinely on a zero-hours contract — one that requires availability without guaranteeing work — and you call them in for less than their contracted availability, they are entitled to be paid for either 25% of their contracted hours or 15 hours, whichever is the lesser. This is the "zero-hours minimum payment" under the 2018 Act.
For casual workers with no availability obligation, this specific payment doesn't apply in the same way — but they are still entitled to the national minimum wage for any hours actually worked.
All workers, regardless of contract type, are entitled to 4 working weeks of statutory annual leave once they have worked enough hours to qualify. Annual leave accrues based on hours worked (8% of hours worked in a leave year, capped at 4 working weeks), which means even casual and zero-hours workers build up leave entitlement if they work regularly.
Payroll and tax obligations
Every payment to an employee — including casual or occasional workers — must be processed through payroll. There is no threshold below which you can pay someone informally. Revenue requires real-time payroll submissions via ROS on or before each payday.
For any worker classified as an employee, standard deductions apply:
- Income tax at 20% up to the standard rate cut-off (approximately €44,000 for a single person in 2026), and 40% above that. Ireland uses tax credits rather than a personal allowance, so a worker's tax position depends on the credits they hold.
- USC applies in bands: 0.5%, 2%, 3%, and 8% depending on income level.
- PRSI Class A applies to most employees: the employee contributes approximately 4.1% and the employer approximately 11.15%.
Casual workers who work infrequently may have low annual income, but each payroll run must still be processed correctly using their tax credit certificate. Incorrect deductions — overtaxing someone on emergency tax because the paperwork wasn't done — creates admin problems and affects trust.
Employment status matters more than the label
Calling someone a casual worker or putting them on a zero-hours contract does not automatically make them self-employed. Irish Revenue and the WRC look at the reality of the working relationship: who controls how the work is done, whether there is substitution, whether equipment is provided, the regularity of the arrangement, and so on.
A worker who consistently shows up, follows your processes, uses your tools and has no other clients is likely an employee in law — even if you have both signed a document calling them a contractor. Getting this wrong creates liability for unpaid employer PRSI, unpaid annual leave, and potential WRC claims.
If you are unsure about a worker's status, Revenue's Code of Practice for Determining Employment or Self-Employment Status is a reasonable starting point. For anything complex, take professional advice before the relationship develops a long history.
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