Here in Thailand, instant bank transfers at any ATMs cost about 25 baht— roughly $0.75 USD per transaction.

With such an easy method of sending money between people, it's extremely handy. Compared to what I'm used to in Canada, only thing that comes close is e-interac payments via email which is still a pain.

That still seems expensive to me, since such transfers are free for personal customers in the UK.

Looking at the business charges at Barclay's, the transfer is either 35p ($0.55) or free, depending on the account.

Sounds super expensive.

It depends on the bank. Mine gives me 5 free transfers per month and then it's 300￥ per transfer after that.