Portfolio size
£50,000
£1k£500k
Account type
Investing in
Annual cost across portfolio sizes
Your portfolio: £50,000
Fee table at key portfolio sizes (ISA · Funds)
| Portfolio | Fidelity | Interactive Investor | Cheaper |
|---|
Monthly trading assumed. Verify fees at source before switching.
Features comparison
| Feature | Fidelity | Interactive Investor |
|---|---|---|
| Invests in | Funds, Etfs, Shares, Investment_trusts | Funds, Etfs, Shares, Investment_trusts, Bonds, Gilts |
| Stocks & Shares ISA | ✓ | ✓ |
| SIPP | ✓ | ✓ |
| GIA | ✓ | ✓ |
| Junior ISA | ✓ | ✓ |
| Flexible ISA | ✗ | ✗ |
| Fractional shares | ✗ | ✗ |
| Regular investing | ✓ | ✓ |
| Mobile app | ✓ | ✓ |
| FSCS protected | ✓ | ✓ |
| Founded | 1969 | 1995 |
Verdict
Choose Fidelity if…
Fund investors who want a broad range of active and passive funds with no dealing charge. Fidelity's 0.35% rate is cheaper than HL for funds, and it offers a junior ISA for families.
Choose Interactive Investor if…
Investors with larger portfolios (£50,000+) where the flat £11.99/month fee becomes very competitive versus percentage-based rivals. Each plan includes one free trade per month — additional trades are £5.99.
Use the calculator above to find the cheapest option for your specific portfolio size and investing style.
Affiliate links — we may earn a commission at no cost to you. Rankings based on fees only.
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