Booking.com Singapore

The stated reward is per booking. Rewards can only be earned on hotel bookings, no rewards will be paid for any other booking type including Flights/Car Rentals/Tours & Activities/Airport Taxis etc.
Reward is based on the room rate and does not apply to any taxes, service fees, VAT or other hotel facility costs (including restaurant and spa). Transactions can only be validated for rewards after completion of your stay. Standard approval process applies.
Checking out a previously saved booking will not be eligible to earn reward.
It may require 180 days or more for Booking.com to approve the transactions upon completion of stay.

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Rewards are not calculated on postage / handling / delivery costs or associated purchase taxes in your region (This may include but not be limited to VAT, GST etc).