How to Become an On-Call (Retained) Firefighter in the UK
Quick answer
On-call (retained) firefighters provide emergency cover around their other commitments, responding to call-outs from home or work when their pager activates. To apply you must usually be at least 18, live or work within about a 5-minute response time of your local fire station, pass the same medical and fitness standards as wholetime firefighters, and be able to provide agreed availability. Full training is provided — no previous experience is needed.
Not everyone who wants to serve as a firefighter can or wants to do it full-time — and that is exactly what the on-call (retained) system is for. On-call firefighters make up a large part of the UK's fire cover, particularly in rural and smaller communities, responding to emergencies alongside other jobs and family commitments. It is also an excellent route in for people exploring the career. This guide explains what the role involves, who can apply, how the process works, and how it compares to becoming a wholetime firefighter.
Applying to a fire service? Try a free practice testWorking with Numbers sample · about 5 minutes · no sign-upStart →Related: On-call applicants usually sit ability tests too — see what they look like.
What an On-Call Firefighter Does
On-call firefighters carry a pager (alerter) and provide cover for agreed periods. When an emergency call comes in during their availability, they respond immediately — usually making their way to the fire station, crewing the appliance, and attending the incident. They do the same operational work as wholetime firefighters: fires, road traffic collisions, rescues, and other emergencies.
Outside of call-outs, on-call firefighters attend regular drill nights and training to maintain their skills and competence. The role is genuinely operational, not a reserve or auxiliary position.
Eligibility and the 5-Minute Rule
The defining requirement of on-call firefighting is response time. You must live or work close enough to your local station to reach it within a short window — commonly around five minutes — when your pager activates. This is why on-call recruitment is intensely local: your home or workplace location relative to the station is decisive.
Beyond location, the core eligibility criteria mirror the wholetime role. You must usually be at least 18 (you can often apply before your 18th birthday), have a good general level of fitness, pass the fire service medical standards for eyesight, colour vision, hearing and lung function, and be eligible to work in the UK. A full UK driving licence is desirable but the essential point is being able to meet the response time by whatever means.
- ✓Live or work within roughly a 5-minute response of the station
- ✓At least 18 at the point of employment (no upper age limit)
- ✓Pass the same medical and fitness standards as wholetime firefighters
- ✓Provide agreed, reliable availability for cover
- ✓Right to work in the UK; you cannot serve as a warranted police officer at the same time
Preparing for the tests
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Availability and Commitment
On-call firefighters commit to providing cover for agreed hours each week — this is negotiated with the service and worked around your main employment and home life. Many employers support staff who serve as on-call firefighters, releasing them to respond during working hours, which is why having an employer onside near the station is so valuable.
The commitment is real: you need to be reliably contactable and ready to respond during your cover periods, including drill nights and training. But it is also flexible by design, which is what makes it possible to combine with another career.
The Application Process
On-call selection broadly follows the same kinds of stages as wholetime recruitment, run locally: an application, tests or assessments, physical and practical tests, an interview and a medical. The exact tests differ between services, and some services use a different aerobic test for on-call applicants — Avon, for example, says its Chester treadmill test is for on-call recruitment. Because no experience is required, the process looks for potential and the right values rather than existing knowledge.
Successful candidates complete an initial training course — often around two weeks — followed by ongoing courses over roughly two years covering road traffic collisions, hazardous materials, breathing apparatus, and fire safety, plus on-station development. You become operational early and build competence over time.
On-Call vs Wholetime
The operational work is the same, but the employment model differs. Wholetime firefighters work full shift patterns for an annual salary; on-call firefighters provide cover around other commitments and are paid through a retainer plus turnout and hourly fees. Many people use the on-call route as a way into the service, and some later transfer to wholetime roles when vacancies arise.
If you want to serve your community, gain real firefighting experience, and keep your existing job or studies, on-call is a strong option — and the preparation for the written tests, fitness, and interview is very similar, so the practice you do transfers if you later go wholetime.
Frequently asked questions
What is an on-call or retained firefighter?
An on-call (retained) firefighter provides emergency cover around their other commitments, responding to call-outs when their pager activates. They do the same operational work as wholetime firefighters and attend regular drills and training, but are employed on a retainer-plus-fees basis rather than a full salary.
How close to the station do you have to live?
You must usually be able to reach your local fire station within a short response window — commonly around five minutes — from home or work when your pager activates. This makes on-call recruitment highly local to each station.
Do on-call firefighters need experience?
No. No previous experience is required — full training is provided, starting with an initial course (often around two weeks) and continuing over roughly two years covering road traffic collisions, hazmat, breathing apparatus, and fire safety, alongside on-station development.
Can you be an on-call firefighter and have another job?
Yes — that is the whole point of the role. On-call firefighters provide agreed cover around other employment and home life. Many employers support staff who serve, releasing them to respond, which is why working near the station is valuable.
Is the on-call selection process the same as wholetime?
It usually has the same kinds of stages — application, tests or assessments, physical tests, interview and medical — run as local campaigns, though details can differ. Preparation transfers well if you later apply for a wholetime role.