Credit Suisse Group AG bankers are trying to entice rich clients with higher-yield notes and bonus deposit rates in a bid to quickly recoup as much as possible of the almost $90 billion recently pulled from the bank.

The head of the Swiss lender's wealth unit, Francesco de Ferrari, is mobilizing his 1,800 relationship managers in a mass calling campaign with offers including a lowered threshold on balances entitled to an interest rate of 5% to 6%, according to people familiar with the matter, who asked not to be identified as the plans are private. In addition, the bank is offering notes that pay a fixed rate of close to 7% to compensate investors for lending their cash for a number of months, the people said.