Total customers numbers at the FTSE250 company increased to 232,000 in the year to 30 September, with consumer platform YouInvest and its advisory Investcentre posting a 19% rise to 218,000.
Assets under administration rose 13% to £52.3bn, though net inflows were down 11% to £3.9bn on halved pension transfers.
Andy Bell, chief executive, said that the company’s first full-year trading update since its IPO had demonstrated “the resilience of our business model”.
Bell said: "The long-term growth drivers of the platform market remain strong with customers increasingly looking to take control of their long-term savings with flexible, low-cost, online solutions. This, coupled with our strong customer retention rate, positions us well to achieve our organic growth ambitions."