Mumbai, July 24 -- Kotak Mahindra Bank is betting on its new, invite-only 'Solitaire' programme aimed at affluent customers to grow its credit cards portfolio, five months after the Reserve Bank of India lifted the ban on the private lender from onboarding new credit cards customers.

"An affluent product like the Solitaire card would be very material to the customer spends compared to say an average customer in the portfolio," said Frederick D'Souza, business head-credit cards, Kotak Mahindra Bank.

"It is going to be our play in getting that customer spend share and in making sure that our customers find the product interesting to keep spending on a card and therefore build and strengthen the relationship with the bank," D'Souza told Mi...