ISA fees at key portfolio sizes
| Portfolio | Funds | ETFs | Shares |
|---|
Monthly trading assumed. Verify at Interactive Investor
Accounts & features
| Stocks & Shares ISA | ✓ |
| SIPP | ✓ |
| GIA | ✓ |
| Junior ISA | ✓ |
| Flexible ISA | ✗ |
| Fractional shares | ✗ |
| Regular investing | ✓ |
| Mobile app | ✓ |
| FSCS protected | ✓ (up to £85,000) |
Overview
Interactive Investor (ii) is the UK’s second-largest direct investment platform, and the leading flat-fee option for UK investors. Instead of charging a percentage of your portfolio, ii charges a fixed monthly subscription — making it dramatically cheaper than percentage-based platforms for larger portfolios.
The flat fee advantage
At £11.99/month (£143.88/year) for an ISA, ii’s cost is fixed regardless of whether you have £50,000 or £500,000 invested. For a £100,000 portfolio, this compares to £450/year at Hargreaves Lansdown — a saving of over £300/year.
The subscription includes 12 free trades per year. Additional trades cost £5.99 each.
Who is ii best for?
- Investors with portfolios over £50,000 where the flat fee beats percentage charges
- Long-term buy-and-hold investors who trade rarely or use their included free trades
- Investors who want a broad range — ii offers the same breadth as HL
Who might prefer alternatives?
- Investors with portfolios under £30,000 where the flat fee is disproportionately expensive
- Passive ETF investors who only need ETFs and could use InvestEngine for free
Verdict
ii is the natural upgrade from HL for investors whose portfolios have grown. The crossover happens around £50,000 for most funds investors. Use our calculator to find your exact crossover point.
Open a Interactive Investor ISA
Open account at Interactive Investor →Affiliate link — we may earn a commission. Capital at risk.