The fee drag nobody talks about
The average active equity fund in the UK charges an ongoing charges figure (OCF) of 0.75% to 1.0%. A Vanguard FTSE Global All Cap tracker charges 0.23%. An iShares Core MSCI World ETF charges 0.20%.
That 0.75% annual difference sounds trivial. It isn't.
On a £20,000 ISA contribution growing at 7% gross, the fee difference alone costs you £4,200 over 10 years, £15,800 over 20 years, and £38,600 over 30 years. That's a new car — or a year's salary for many UK workers — evaporating into fund manager bonuses. Before your active manager has picked a single stock, they're already 0.75% behind. The FCA's Assessment of Value rules were supposed to force funds to justify their fees. Yet the average active OCF has barely budged.
The ISA allowance is £20,000 for 2025/26 — the same as it's been since 2017, per gov.uk guidance. In real terms, that allowance has shrunk by over 20% to inflation. Every pound of it matters more now, which makes paying unnecessary fees even harder to justify.
The fund industry calls this the "cost of expertise." The data calls it a transfer of wealth from investors to managers.