Hi Alvin, thank you for your question. If you drive through an ERP gantry without paying, you will receive a notice of ERP violation. You will be subject to a fine of between $10 to $70. If you pay your fine within 2 weeks of receiving your notice for missing the ERP payment, you will have to pay the ERP charge plus an administrative fee of $10 ($8 if you use online payment). More details can be found here: https://onemotoring.lta.gov.sg/content/onemotoring/home/driving/ERP/ERP.html