share of wallet
n.— «Customers with spare borrowing capacity, or those with a lot of their business elsewhere, can be targeted so that Westpac can satisfy more of their banking or asset management needs. In industry parlance, it’s called increasing your “share of wallet.” Of Westpac’s consumer customers, for example, only 65 per cent are classified as “revealed,” with 70 per cent or more of their business with the bank.» —“Westpac’s growth deposited at home” by Richard Gluyas News.com.au (Australia) Feb. 27, 2006. (source: Double-Tongued Dictionary)