The number of advisers using the Parmenion investment service exceeds 450 while assets under administration exceed half a billion.
The average case size has increased by 50 per cent, especially since July when the firm introduced its tiered charging structure. This replaced the 0.30 per cent charge with a tiered scale from 0.30 per cent 0.15 per cent depending on the size of a client's portfolio.

Richard Mein, managing partner at Parmenion, said: "Parmenion has always strived to provide the best possible investment services and support to our advisers in today's competitive and challenging environment.
"As advisers have continued to use our services to underpin their own centralised investment propositions, they are increasingly using us for much larger portfolios and it has become clear that the charging structure needed to accommodate this.
"Our investment risk expertise, intelligent technology and award winning service mean that advisers are supported through the entire investment process, freeing them up to concentrate on planning for their clients' futures and running successful businesses."