Question to the HM Treasury:

To ask the Chancellor of the Exchequer, pursuant to the Answer of 11 November 2025 to Question 87814, what proportion of mileage claims are made using a). HMRC Approved Mileage Allowance Payment rates and b). employers own assessment by 1). employees and 2). the self-employed.

This question was answered on 25th November 2025
The rate at which employees are reimbursed for undertaking business mileage in their personal vehicles is a matter between employers and their employees. As such these are exempt from reporting to HMRC, and the Government does not routinely collect the information requested.

HMRC recently published research on benefits-in-kind and expenses. Of those employers surveyed, 41% of employers reimbursed mileage for employees using their own car for business travel, of which 37% reimbursed at the Approved Mileage Payment Rate and 4% at another rate.

The research report can be found here: Research with employers on Benefits in Kind and expenses - GOV.UK

Self-employed people are able to choose whether to use the simplified mileage rates or claim actual expenses and capital allowances for a vehicle. HMRC published research carried out in 2023 which showed that 29% of self-employed people who use vehicles in their business use the simplified mileage rates.

The research report was published on 28 May 2025 and can be found here: HMRC Mileage Rates Research - GOV.UK