TSB is to roll out contactless payments technology to about two million customers as it re-brands its cards.
By the end of June, all 2.2 million TSB debit card customers will be able to use the "tap and go" technology to make small payments.
The bank said that new TSB-branded debit cards will replace customers' existing Lloyds TSB-branded cards when they expire in the first half of this year, marking another significant step in the separation of the two banks.
The TSB bank appeared again as a standalone high street name last autumn, with Lloyds offloading more than 600 branches to meet European competition rules. TSB had disappeared as a separate name in 1995 after merging with Lloyds.
More than 200,000 TSB customers already have cards which can be used to make contactless payments, meaning they can pay by holding their card up to a reader at the till for a transaction of up to £20 rather than having to enter a pin number.
According to figures from the UK Cards Association, 36.3 million cards across the UK had been enabled with contactless technology by last autumn and they could be used at more than 164,000 terminals. Retailers such as Marks & Spencer and Boots accept payments made in this way.