BOSIS will offer services including tax and inheritance advice, and pension and investment planning for upmarket professionals aged between 30 and 65.
"A number of brands offer these services but they are aimed at a mass market. BOSIS is much more focused on targeting the professional market," Richard Warren, the director of strategy at DLKW, said.
The agency is developing a press and poster campaign to launch the service.
HBOS's decision to launch its own division contrasts with the strategy adopted by its banking rivals such as Barclays and Lloyds TSB, which offer wealth management services via distribution deals with the existing providers Legal & General and Scottish Widows respectively.