Hi Alan! Your Autopass Card can be topped up to a maximum of $500. You can top up your card in the following ways:
Singapore Bank ATMs (DBS/ POSB/ OCBC/ UOB)
NETS Self-Service Stations
NETS Top-Up Machines located at selected car parks
NETS Sales & Customer Service Centre
Via credit and debit cards (Foreign and Singapore-issued)
For NETS FlashPay card: Download the NETS App from Google Play Store or Apple App Store and register for Auto Top-Up (ATU) service to top up on-the-go. Registration for ATU service is not required for ad-hoc top-up.