Follow up

HMRC’s advisory mileage rates

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Paying more than HMRC’s advisory rates

Company car. If your clients provide employees with company cars, they are entitled to pay them a fuel rate to reimburse them for business mileage. These are less generous than the approved rates applicable to employees that use their own vehicle, as the company car rates reflect the cost of fuel only, rather than wear and tear etc. HMRC updates its advisory fuel rates , i.e. the rate employers can pay without triggering any tax or NI consequences, on a quarterly basis. The most recent were published at the beginning of March 2022 (see Follow up ).

Bespoke. It is possible for your clients to opt to pay above HMRC’s advisory fuel rates and not trigger any tax or NI consequences. This is permissible to take into account local fluctuations in pump prices, but given how badly the current published rates reflect the actual pump prices, it may be worth bringing to your clients’ attention.

Calculation. In order to work out a bespoke rate, you will need the miles per gallon (MPG) figure for each car your client will make payments for. It’s then a good idea to record the per litre price of all fuel purchases to work out an average cost, e.g. for the month. You then convert this into the per gallon price, and divide this by the MPG figure to get the rate per mile. This is the same logic HMRC uses, you will just substitute the historic average price for a more accurate one. For example, for a car averaging 40 MPG, filled with diesel at 180p per litre, the bespoke rate would be (180 x 4.546)/40 = 20p (25% higher than HMRC’s current rate).

Pro advice. Advise your clients to keep the receipts and calculations in case HMRC asks them to justify the higher payments later on.