NIM05702 | Class 1 NICs: Expenses and allowances: Mileage allowances: Normal components of a mileage allowance
From HM Revenue & Customs · National Insurance Manual
The normal components of a mileage allowance are:
fuel
oil and other lubricants
the additional insurance costs incurred as a result of using a car for business related travel
road fund licence
servicing, repairs and replacements
depreciation.
Although the payment of mileage allowances is one way employers reimburse employees the costs they incur using a privately owned car for business travel, employers may choose to meet the cost by:
repayment of the exact costs involved, see NIM05020
regular round sum allowances, see NIM06160
supplying fuel from their own fuel pump, see NIM05662
requiring the employee to use a garage with which the employer has an account, see NIM05662
providing fuel vouchers, NIM05662
supplying the employee with a company credit card or fuel agency card, see NIM05662