An auto top-up account will keep a minimum level of funds in your NCP ParkPass account at all times by adding a top-up amount of funds automatically. You need to decide what this minimum level is and also what your regular ‘top-up’ amount will be. Top-ups will be triggered when the account reaches the minimum level you have set. The cost of your parking session will be deducted from your NCP ParkPass account each time you exit the car park. You must have a positive balance of funds to use NCP ParkPass.