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 | Trading 212 | Cheaper |
|---|
Monthly trading assumed. Verify fees at source before switching.
Features comparison
| Feature | Interactive Investor | Trading 212 |
|---|---|---|
| Invests in | Funds, Etfs, Shares, Investment_trusts, Bonds, Gilts | Etfs, Shares |
| Stocks & Shares ISA | ✓ | ✓ |
| SIPP | ✓ | ✗ |
| GIA | ✓ | ✓ |
| Junior ISA | ✓ | ✗ |
| Flexible ISA | ✗ | ✓ |
| Fractional shares | ✗ | ✓ |
| Regular investing | ✓ | ✓ |
| Mobile app | ✓ | ✓ |
| FSCS protected | ✓ | ✓ |
| Founded | 1995 | 2004 |
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 Trading 212 if…
Active traders and ETF investors who want zero fees and a flexible ISA (so you can withdraw and re-invest within the same tax year). Note there is no SIPP, so not suitable as a standalone pension platform.
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.
Related comparisons
Interactive Investor vs AJ Bell
Trading 212 vs AJ BellInteractive Investor vs Fidelity
Trading 212 vs FidelityInteractive Investor vs Freetrade
Trading 212 vs FreetradeInteractive Investor vs Hargreaves Lansdown
Trading 212 vs Hargreaves LansdownInteractive Investor vs InvestEngine
Trading 212 vs InvestEngineInteractive Investor vs Vanguard
Trading 212 vs Vanguard