A mileage claim will use a Mileage Class, and these can be set to have a lower VATable Rate than the 'Claimable' one. Mileage Class settings can be reviewed by an administrator via the Settings area.
The VATable rate means that the VAT rate for the expense is applied to the value entered per mile. Therefore, if the VATable rate is set as £0.10 and the VAT rate is 20%, VAT will be calculated at £0.02 (2p) per mile.
