How Many First Aiders Does Your Workplace Need in Ireland?
There is no single magic number. Irish law asks you to match your first aid cover to the real risks of your workplace — so the right answer comes from a short, honest assessment, not a chart pulled off the internet.
It is one of the most common questions managers ask us: how many trained first aiders do we actually need? People hope for a tidy ratio they can pin to the noticeboard and forget. The honest answer is that Ireland does not work that way. Instead of a fixed headcount, the law expects your cover to be proportionate to the hazards your people face. That sounds vague at first, but once you understand the factors involved it becomes a straightforward decision.
Where the duty comes from
The starting point is the Safety, Health and Welfare at Work Act 2005which places a general duty on every employer to protect the safety, health and welfare of staff so far as is reasonably practicable. The specific first aid requirements then live in Part 7 of the Safety, Health and Welfare at Work (General Application) Regulations 2007.
Part 7 requires you to provide suitable first aid equipment and, where the nature of the work makes it necessary, trained occupational first aiders. The Health and Safety Authority (HSA) is the body that oversees these duties. Crucially, the Regulations do not name a national ratio — they make the level of provision depend on a risk assessment.
The question is never simply "how many heads?" It is "could a casualty get competent help quickly enough, on every shift, in every part of this site?"
The factors that drive the number
When you sit down to decide, weigh up the things that genuinely change the odds of someone being hurt and how badly:
- The nature of the work. A low-hazard office is not the same as a workshop with machinery, chemicals or vehicles. Higher-risk activity pushes the number of first aiders up.
- How many people are present. More staff, contractors and visitors means more potential casualties at any moment.
- Shift patterns and lone working. Cover that looks fine at 11am can collapse on a night shift or when your only first aider is on holiday.
- The layout and spread of the site. Multiple floors, separate buildings or a large yard all add travel time to a casualty.
- Distance from emergency services. A remote rural premises needs more self-reliance than one minutes from an ambulance station.
Turning the factors into a plan
A practical way to settle on a figure is to picture the worst realistic scenario and work backwards. If your busiest area had a serious incident at the most awkward time, who would reach the casualty, and how fast? If the honest answer is "nobody trained, for several minutes," you need more first aiders or better placement of the ones you have.
Two further safeguards matter as much as the raw count. First, build in redundancy — never rely on a single trained person, because illness, leave and turnover are guaranteed. Second, think about distribution. Three first aiders all sitting in one office do nothing for the warehouse next door. Spread your cover across shifts, floors and high-risk zones.
Don't forget the appointed person
In genuinely low-risk, very small workplaces, full occupational first aid training may not be strictly required. Even then you should nominate an appointed person to take charge of first aid arrangements: checking and restocking the kit, and calling the emergency services when needed. It is a minimal, sensible baseline rather than a substitute for trained cover where risk warrants it.
✅ Key takeaways
- Ireland sets no fixed national first aider ratio — cover is risk-based under Part 7 of the General Application Regulations 2007.
- Decide your number from the work's hazards, headcount, shifts, site layout and distance from emergency help.
- Always build in redundancy so leave or turnover never leaves you with zero cover.
- Spread first aiders across shifts and high-risk areas rather than clustering them.
- Record the reasoning in your safety statement so you can show the HSA how you arrived at it.
Write it down in your safety statement
Whatever number you land on, document how you reached it. Your safety statement should explain the assessment, name your first aiders, note their training currency and set out how cover is maintained during absences. That written reasoning is exactly what an HSA inspector will look for — and it protects you far better than a number plucked from thin air.
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Review it like everything else
Your first aider number is not a one-off decision. Revisit it whenever you change premises, add a shift, take on a higher-risk process or grow your headcount. A figure that was right for a ten-person studio rarely fits the same business once it employs fifty. For the wider duties around equipment, kits and trained cover, see our overview of first aid at work in Ireland, and make sure your team's life-saving skills are current by reviewing CPR and defibrillator basics.
