Westpac has joined National Australia Bank and Commonwealth Bank of Australia in offering a no interest credit card that will target the buy now, pay later sector’s Millennial customers, who tend to avoid high-rate cards with big credit limits.

A year after its two rivals announced similar products and five years after Afterpay started to scale, Westpac said its new card Flex will help improve traction with younger customers, a segment where Westpac remains badly underweight.