Hi Calvyn! You can find the ERP rates here: https://www.mytransport.sg/content/mytransport/home/myconcierge/erprates.html

Although, ERP rates will be suspended at most areas from 6th April. You can read more about it here: https://www.motorist.sg/article/567/erp-to-be-suspended-at-most-locations-from-6-april-due-to-covid-19-outbreak