Flat monthly fee that gets cheaper the more you invest
Interactive Investor charges a flat monthly subscription instead of a percentage. On a £200,000 portfolio, £5.99 a month is a fraction of what percentage-fee platforms charge, which is why ii keeps winning larger DIY investors.
The equation flips for small pots: £71.88 a year on £10,000 is 0.7%, more than almost any rival. Work out your portfolio size first, then decide.
Best for: Portfolios above roughly £60k where a flat fee beats percentage charges.
| Platform fee | Core £5.99/month (up to £100k); Plus £14.99/month (no limit); Premium £39.99/month |
|---|---|
| Share dealing | £3.99 per trade (£2.99 on Premium) |
| Fund dealing | £3.99 per trade (£2.99 on Premium) |
| FX fee | 1.5% on the first £25k, tiered lower above |
| Stocks & Shares ISA | Included in the monthly plan |
| SIPP | Included in the monthly plan |
| Withdrawals | Free |
| Minimum to start | No minimum (£25/month for regular investing) |
Verified July 2026 against Interactive Investor's published charges. Always check the provider's current schedule before opening an account.
FSCS protected up to £85,000. Authorised and regulated by the FCA.
Interactive Investor scores 4.6 out of 5 on Trustpilot (Excellent) from over 28,000 reviews.
Long-standing customers value the flat fee and the breadth of investments.
The 1.5% headline FX fee and occasional platform outages are the recurring complaints.
Interactive Investor can hold your investments, but it will not tell you whether they add up to the retirement you want. Delphina models your whole financial life and gives you a straight answer.
Capital at risk. This page is information, not financial advice.