What categories of vehicles are eligible to use motor tax on line?

Private Cars, Agricultural Tractors / Excavators, Motorcycles, Exempt Vehicles (i.e. vehicles adapted for use by disabled persons) Motor Caravans and Vintage/Veteran Vehicles may be taxed online.  The site facilitates the payment of up to 3 months arrears, after which time your PIN number will become inactive and your motor tax transaction must be completed through your local motor tax office. Please note that Goods Vehicles may not be taxed online.