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 | Interactive Investor | InvestEngine | Cheaper |
|---|
Monthly trading assumed. Verify fees at source before switching.
Features comparison
| Feature | Interactive Investor | InvestEngine |
|---|---|---|
| Invests in | Funds, Etfs, Shares, Investment_trusts, Bonds, Gilts | Etfs |
| Stocks & Shares ISA | ✓ | ✓ |
| SIPP | ✓ | ✓ |
| GIA | ✓ | ✓ |
| Junior ISA | ✓ | ✗ |
| Flexible ISA | ✗ | ✗ |
| Fractional shares | ✗ | ✓ |
| Regular investing | ✓ | ✓ |
| Mobile app | ✓ | ✓ |
| FSCS protected | ✓ | ✓ |
| Founded | 1995 | 2019 |
Verdict
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.
Choose InvestEngine if…
Passive investors who want to build a low-cost ETF portfolio and never pay a platform fee. Ideal if you're happy with index funds and ETFs and don't need access to active funds or individual shares.
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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