If you want the very best deal on a big bank mortgage, get ready to sign up for more products, whether you like them or not.

Banks want your business, all of it — your chequing account, credit card, investments, creditor life insurance, auto loan. The whole enchilada. And if you don’t give them more than your mortgage, depending on the bank, you don’t get their lowest mortgage rates.

It’s typical for lenders to factor a client’s other business into their mortgage rates. In fact, this so-called ‘relationship pricing’ is as old as banking itself. But some banks (e.g., Canadian Imperial Bank of Commerce and Bank of Nova Scotia) are extra vocal about pushing multi-product commitments.

At CIBC, for example, “If the (mortgage) economics are not constructive, we look for the clients that understand the kind of relationship we want to build with them, and work with them,” said chief executive Victor Dodig at Tuesday’s Royal Bank of Canada Capital Market’s Canadian Bank CEO Conference.