Using the advisory fuel rates | Severn Accounting

HMRC publish mileage rates for petrol, LPG and diesel and electric cars. The rates are known as the advisory fuel rates and are updated quarterly with effect from 1 March, 1 June, 1 September and 1 December. The rates are fuel-only rates, which can be used either to reimburse employees for fuel used for business travel in a company car or where an employee needs to repay the cost of fuel used for private journeys in a company car. For petrol, LPG and diesel cars, the rate depends on the engine size, whereas for electric cars the rate depends on whether the car was charged at a home charger or a public charger.

The rates applying from 1 June 2026 are as follows:

Repaying private travel

If an employee has a company car other than an electric car, a fuel benefit tax charge will arise if the employer meets the cost of private travel. This is an all-or-nothing charge – the charge will apply if the employer meets the cost of any private mileage in the year. The charge can be significant as the amount charged to tax is found by applying the appropriate percentage used to work out the company car benefit by the multiplier for the year, which for 2026/27 is set at £29,200.

To avoid the charge, the employeemust make good the cost of all fuel for private journeys. The amount which the employee will need to reimburse can be calculated using the advisory fuel rates. To eliminate the charge, the cost of private fuel must be repaid no later than 31 May after the end of the tax year if the benefit is payrolled and no later than 6 July after the end of the tax year if it is returned on the P11D.

The advisory rates do not need to be used if it can be shown that the employee has met the full cost of fuel for private travel by reimbursing at a lower rate.

There is no fuel benefit charge if the employer meets the cost of electricity for private journeys in an electric car, so reimbursement is not needed here.

Need advice on this topic? Get in touch with Severn Accounting — we serve businesses across Worcester and Birmingham.