What are the best cashback cards to exploit contactless payment systems?

Some cash backs cards has minimum spending.
Check whether you meet the minimum to enjoy the reward.

Citibank unlimited gives 1.6%, standard chartered 1.5%, Amex true cash back 1.5%

I used the SMRT card, with 300 minimum spending will enjoy higher rebates.

Hi Anon, you can look at DBS Live fresh @ 5% cashback capped at $60 with min spend of $600 or UOB Preferred Platinum Visa if you're into miles: 4mpd for online, pay wave and mobile.