How Many First Aiders Does Your Workplace Need?

If you've searched for this, you're probably expecting a straight number. There isn't one — and that catches a lot of employers out. The Health and Safety Executive (HSE) is clear: "there are no hard and fast rules on exact numbers, and you will need to take into account all the relevant circumstances of your particular workplace." Here's how to work out what that means for your business.

There's no fixed legal number — it's based on risk

The Health and Safety (First-Aid) Regulations 1981 require employers to provide "adequate and appropriate" first-aid equipment, facilities and personnel. What counts as adequate and appropriate depends entirely on your workplace — an office with five people carries a different risk profile to a warehouse with fifty. That's why HSE asks employers to run a first-aid needs assessment rather than follow a fixed ratio.

The legal minimum every employer must have

Regardless of size or risk level, HSE guidance sets out that every employer must have, as a minimum: A suitably stocked first-aid kit An appointed person to take charge of first-aid arrangements Information for all employees on what those arrangements are An appointed person isn't required to hold any formal first-aid qualification — their role is to look after the kit, take charge in an emergency, and call the emergency services when needed. If your workplace carries low risk (a small office with no machinery or hazardous materials, for example), this minimum provision may be enough.

How to work out what you actually need

Once your workplace carries more risk — machinery, hazardous materials, larger or dispersed teams — you're more likely to need trained first-aiders rather than just an appointed person. HSE sets out the factors your needs assessment should consider:

The nature of the work you do
Workplace hazards and risks, including anything requiring special arrangements
The size and nature of your workforce
Staff work patterns and shift coverage
Holiday and other absences of your first-aiders and appointed persons
Your organisation's history of accidents or incidents

Depending on your setup, you may also need to think about:

Travelling, remote, or lone workers
How your workforce is distributed across sites
How far any site is from emergency medical services
Shared or multi-occupancy premises
First-aid provision for non-employees, such as visitors or members of the public

You don't have to document your needs assessment by law, but HSE recommends it — it's the clearest way to show how you arrived at your level of provision if it's ever questioned.

What this usually means in practice

There isn't an official ratio to plug your headcount into, but the general pattern HSE describes is straightforward: lower-risk workplaces (clerical, low-hazard offices) can often manage with the legal minimum, while higher-risk workplaces (construction, manufacturing, warehousing, anywhere with machinery or hazardous substances) are more likely to need one or more people trained to a recognised level — and enough of them to cover holidays, shifts, and absence.

If that sounds like your business, the next question is which level of training fits: First Aid at Work (FAW) is the more comprehensive course, generally suited to higher-risk workplaces or larger teams.

Emergency First Aid at Work (EFAW) is the shorter course, generally suited to lower-risk workplaces. Which one applies to you still comes back to your own needs assessment.

Choosing who delivers the training

Since October 2013, HSE no longer approves first-aid training organisations or qualifications — it's the employer's responsibility to check that whoever delivers the training is competent to do so. Worth asking any provider: who delivers the course, what's their operational background, and does the content match the risks in your specific workplace, rather than a generic course.

Get a starting point for your business

Use our free first aid needs assessment tool for an initial read on what level of provision fits your workplace, or get in touch and we'll talk it through with you.