Yo.. JP1. Yr rite.... if you get the Picanto say $38000k norm. The OPC will cost u $38000 - $17000 = $21000 plus you get $800 rebate for your yearly road tax subject to $50 minimum
So I think yrs will be $50 per yr based on your car cat. You can also check out the LTA website on OPC scheme for more details. It contains other useful info as well :
http://www.lta.gov.sg/motoring_matters/motoring_vo_policynschemes_offpeak.htm
But the downside is that, when u scrap yr car later on.... u do not get back rebates.
Anyone knows if we could get back anything if u convert OPC to norm car later... say after u drive for 7yrs?
Hope the above info helps
