Personal Finance Society (PFS) chief executive Fay Goddard will step down next year after five years with the body.
Goddard was appointed chief executive in July 2008 and PFS membership has increased from 24,000 to over 33,000 under her leadership.
She also oversaw the launch of the Chartered Institute of Insurance's (CII) chartered financial planner initiative, which has now has 3,200 title holders.
Goddard (pictured) said: 'It has been a privilege to head the PFS through a time of great change and I am immensely proud of the way members have risen above and beyond the challenges.
'I have enjoyed the support of my CII colleagues, the PFS board and the members during my time as chief executive and pleased to have had the opportunity to work with such a dedicated and enthusiastic team.
'The financial planning profession is entering a new era and it seems timely to step down now and let someone new take the PFS forward through its next phase of development. I have no doubt that the society will continue to go from strength to strength.'
Sandy Scott, chief executive of the CII, said: 'I am sorry that Fay will be leaving us, but she has successfully led the PFS through the retail distribution review and will be leaving the organisation in excellent shape, both in terms of reputation and membership size.
'All of us at the CII wish her the very best for her well-deserved retirement, although knowing Fay I suspect she will still be active in the profession.'