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 | ✗ | ✗ |
| Transfer out fee | Free | Free |
| Fractional shares | ✗ | ✗ |
| Regular investing | ✓ | ✓ |
| Mobile app | ✓ | ✓ |
| FSCS protected | ✓ | ✓ |
| Founded | 1969 | 1995 |
Verdict
Fund investors who want a broad range of active and passive funds with no dealing charge. Same 0.35% as HL but without HL's £1.95 fund dealing fee, and 0.20% on the whole balance above £250,000. Junior ISAs have no service fee.
Investors with portfolios above about £20,000, where the flat Core fee of £71.88/yr beats HL's 0.35%. Excellent value from £50,000, where HL charges £175/yr or more. Portfolios over £100,000 need the Plus plan (£179.88/yr), which is still far cheaper than percentage fees at that size.
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.
Read our full reviews: Fidelity review · Interactive Investor review
Don't want to choose? You can hold ISAs with both Fidelity and Interactive Investor at the same time.