You can use FAST as long as you have an OCBC Savings/Current account and one of the below:
OCBC Online Banking (Don't have Online Banking access? Apply now!)
OCBC ATM/Debit Card
How much can I transfer using FAST?
You can transfer up to S$10,000 each time
For transfers more than S$10,000, our same-day transfer service is also available.
Otherwise, simply perform multiple transfers of not more than S$10,000 each time – for free.
Note that your existing daily transaction limits apply.
Can I transfer to other banks which are not on FAST yet?
You can still continue to transfer funds to other banks. However, these funds will be credited within 2 – 3 working days. When adding account payee under such banks, please ensure that the correct branch names and codes are selected.