Members of the Pensions and Lifetime Savings Association (PLSA) could see a change in their membership fee as the trade body hints it will evaluate its charging model.
Currently, business membership costs are between £840 and £16,803 a year, depending on assets under management or UK pension turnover.
For pension fund members, the cost is calculated at 20.73 pence per member, with a minimum charge of £273 and a capped cost of £8,962.
However, speaking at an open forum at the trade body's annual conference on 19 October, PLSA chief executive Julian Mund said the model may not be fit for the trade body's future.
He was responding to a charity pension fund member who questioned whether the broadening membership scope meant the funding structure needed revisiting, also noting it can be difficult for small schemes and charities to avoid the fee.
"Is our current funding model fit for the future? Absolutely not," Mund said.
He suggested the association could remove the caps.
"We have a membership model which is a capped model. Is that going to be sustainable in the future? Do we have the answer now? No.
"We are going to look at it as a priority to make sure the way we are funded - the activity we do - is still going to work. It is something that we will be working hard on and it is a priority over the coming years."
It comes as the trade body is also reconsidering its governance structure, proposing to scrap its constitution and articles of association, drawn up in 1974, to replace them with more modern versions.
It may also ditch its defined benefit and defined contribution councils and replace them with a single policy board, subject to a consultation with members expected to kick off later this month.
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