How Many First Aiders Does Your Workplace Need?
Irish law sets no fixed ratio of first-aiders to staff. The right number comes from a risk-based needs assessment of your own workplace. Here is how to work it out.
One of the most common questions Irish employers ask is also one of the simplest to phrase and the hardest to answer with a single number: how many first-aiders do we actually need? The honest answer is that Irish law does not set a fixed ratio. Instead, the Safety, Health and Welfare at Work (General Application) Regulations 2007, and Part 7 in particular, require you to decide the right level of cover through a structured assessment of your own workplace.
That risk-based approach can feel uncertain at first, but it is far more sensible than a blanket rule. A quiet office and a busy manufacturing site face very different hazards, and the law expects your first-aid provision to reflect that difference.
Why there is no national magic number
The underlying duty comes from the Safety, Health and Welfare at Work Act 2005: an employer must protect the safety, health and welfare of employees so far as is reasonably practicable. The Health and Safety Authority (HSA), the national regulator, enforces this by expecting employers to think through their own circumstances rather than apply a one-size-fits-all figure.
The right number of first-aiders is the number your risk assessment justifies. Too few leaves a gap; too many is rarely a problem, but it is still worth getting the balance right.
Carrying out a first-aid needs assessment
The tool that gives you your answer is the first-aid needs assessment. It is closely tied to the wider risk assessment in your safety statement and looks at the factors that influence how likely an injury is and how serious it could be. Work through these questions for your own site:
- What is the nature of the work? Higher-hazard tasks such as machinery operation, chemical handling or working at height demand more cover than low-hazard desk work.
- How many people are on site, and where? Larger workforces and spread-out premises usually need more first-aiders.
- Is the work shift-based or does it involve lone working? Every shift, including nights and weekends, needs cover.
- How accessible are emergency services? A remote location with a longer ambulance response time raises the stakes.
- What is your incident history? Past accidents and near misses are a strong signal of where cover is needed.
Lower-risk workplaces
In a typical lower-risk setting, such as an office, a small shop or a professional services firm, the hazards are limited and serious injuries are uncommon. Here the assessment will usually justify a modest level of cover: at least one appointed person to take charge of first-aid arrangements and equipment, and a trained occupational first-aider where the size of the workforce or the layout suggests one is needed.
The key is continuity. Even a small team needs cover when the usual first-aider is on holiday or off sick, so it is good practice to train more than one person so that someone qualified is always present.
First Aid training from €35
Self-paced, HSA-aligned, certificate the same day — €35 per person.
Higher-risk workplaces
Construction sites, factories, warehouses, food production and care settings carry greater risk, so the assessment will generally point to more first-aiders and a higher standard of equipment. In these environments you should consider:
- More occupational first-aiders, distributed so that one is always close at hand across the whole site and every shift.
- Additional or specialised equipment identified by the hazards present.
- A dedicated first-aid room where the scale and risk of the operation warrant it.
- Clear procedures so employees know exactly who to call and where to go.
For a fuller picture of the legal duties that sit behind these numbers, see our guide to first aid at work and what Irish law requires. It is also worth making sure your responders understand the life-saving basics covered in our piece on CPR and defibrillator use.
Keeping cover current
Deciding the number is only the start. First-aid certification needs to be kept up to date through refresher training, and your needs assessment should be reviewed whenever the work, the headcount or the layout changes. A simple register of who is trained, when their certificate expires and where the equipment is kept makes this easy to manage and easy to demonstrate during an inspection.
Key takeaways
- Irish law sets no fixed ratio; the number of first-aiders comes from your own first-aid needs assessment under Part 7 of the 2007 Regulations.
- Lower-risk workplaces usually need an appointed person and at least one trained first-aider, with cover for absences.
- Higher-risk sites need more first-aiders, spread across shifts and locations, plus suitable equipment.
- Review the assessment when conditions change and keep certification current with refresher training.
Working out the right number does not have to be daunting. Run the needs assessment, train enough people to maintain cover at all times, and keep your records tidy. Our online First Aid course from €35is HSA-aligned and self-paced, making it straightforward to qualify the first-aiders your assessment calls for.
