MilesheetPool cars: the rules that make one work
A genuine pool car carries no benefit-in-kind charge. Most cars businesses call pool cars are not pool cars.
A pool car is a company vehicle available to several employees for business use, with no taxable benefit on anyone. It is a genuinely useful arrangement, and it fails more often than it works because the conditions are stricter than people assume.
The conditions
To be a pool car, essentially all of the following must hold:
- It is available to, and actually used by, more than one employee
- It is not ordinarily used by one employee to the exclusion of others
- Any private use is merely incidental to business use
- It is not normally kept overnight at or near an employee's home
Miss one and it stops being a pool car, and a benefit-in-kind charge lands on whoever it was available to — which is usually a considerably worse outcome than the arrangement was trying to avoid.
The two that break most arrangements
"Merely incidental" private use. This is a high bar and it is not the same as "a bit of private use". The classic example that qualifies is taking the car home the night before an early start to a distant meeting — the private journey exists only because of the business one. Popping to the shops in it does not qualify, however small the detour.
The overnight test. A car parked at an employee's house most nights is not a pool car, whatever the policy document says. HMRC looks at what actually happened, and a pattern is easy to see.
The conditions, and what fails them
| Condition | Passes | Fails |
|---|---|---|
| Used by more than one employee | Five staff share it | One person always takes it |
| Not ordinarily used by one to the exclusion of others | Booked out by whoever needs it | Effectively assigned to the sales manager |
| Private use merely incidental | Home the night before a 6am departure | Weekly supermarket run |
| Not normally kept overnight at a home | Parked at the depot | On a drive four nights a week |
Miss any one and the benefit-in-kind charge lands on whoever the car was available to — which is usually far worse than the arrangement was avoiding.
Proving it
The burden is on the employer, and the evidence expected is a mileage log per journey: date, driver, from, to, purpose and distance.
"It is a pool car" is a claim. A log showing six different drivers, all journeys business, and the car at the premises overnight is proof.
This is precisely the sort of record nobody keeps until they need it, and it cannot be reconstructed afterwards — which is why pool car arrangements tend to collapse under the first question rather than the tenth.
Practical setup
- Keep the car at business premises overnight, and record where it was kept
- Log every journey with the driver named
- Have a written policy prohibiting private use, and be able to show it was followed rather than just written
- Review the log periodically for the pattern of one person using it exclusively, which creeps in without anyone deciding it should
Milesheet keeps each vehicle separate with its own journey history, so a pool vehicle's log is a complete record of who went where — the evidence the arrangement stands or falls on.
Sources
- HMRC — Business travel mileage for employees' own vehicles
- HMRC — Advisory fuel rates
- HMRC — 490: Employee travel, a tax and NICs guide
General information, not tax advice. Pool car status is tested on the facts: if you are relying on it, get the arrangement reviewed.