DIY investor market hits new high

New data published today by Boring Money sizes the DIY investor market at £547 billion as at Q3 2025. Buoyant markets contributed to 8% growth in Q3 2025.

The fastest reported AUA organic4 growth over the last 12 months has been seen at Vanguard, AJ Bell, PensionBee, Aviva and interactive investor.

Customer numbers also hit a new high of 12.9 million accounts. Both assets and accounts have more than doubled over the last 5 years, with 1.7 million new accounts being opened in the first 9 months of 2025 alone.

Despite smaller account sizes, the growth in accounts at robo-advisers and challenger brands has significantly outpaced both bank and life company platforms.

CEO Holly Mackay comments, “The acceleration in growth of customer accounts shows no signs of abating despite high levels of concern about the upcoming Budget. I’m interested to see the ongoing divergence in DIY investor types which makes it increasingly difficult to talk about this cohort in a homogenous way. There is a traditional, more affluent investor group which has tended to stick with the classic platform, using desktop with less frequency, And a less affluent younger investor with a more even gender split who engages digitally and more frequently.”