Platform Fees: The Exact Numbers
Bestinvest operates a two-tier fee structure depending on what you hold:
Ready-made Portfolios and US shares:
- 0.20% on the first £500,000
- 0.10% on £500,000–£1,000,000
- 0% above £1,000,000
Third-party funds and UK shares:
- 0.40% on the first £250,000
- 0.20% on £250,000–£500,000
- 0.10% on £500,000–£1,000,000
- 0% above £1,000,000
The split matters more than most investors realise. A £100,000 portfolio entirely in ready-made portfolios costs £200 per year in platform fees. The same amount in third-party funds costs £400. That's a £200 gap on the same balance — enough to buy 40 extra shares trades at Bestinvest's £4.95 rate.
No minimum service fee applies to ISAs, Junior ISAs, or General Investment Accounts. The SIPP carries a minimum of £120 per year (£10/month), excluding Junior SIPPs. At 0.40%, the percentage fee only exceeds the £120 minimum once your SIPP passes £30,000 — below that, you're effectively paying a flat fee regardless of balance.
Cash held on the platform earns 4.1% AER, paid monthly, set by custodian SEI. In ISAs and SIPPs that interest is tax-free. With the Bank of England base rate at 3.75%, Bestinvest is paying above base rate on uninvested cash — a genuine differentiator when many platforms still pay negligible interest on idle balances. For investors who rotate between positions or hold temporary cash during market volatility (like the current Iran-driven uncertainty), this feature earns its keep.