The UK investment platform market has become very competitive, with several platforms offering commission-free investing and low-cost ISA wrappers. Choosing the right one can save you thousands in fees over your investing lifetime.
Quick answer: InvestEngine for free ETF investing. Vanguard Investor for lowest fees on Vanguard funds. interactive investor for flat-fee pricing (best for £50K+ portfolios). Hargreaves Lansdown for the widest fund selection and research. Always invest inside a Stocks & Shares ISA first.
Best UK Investment Platforms Compared
| Platform | Platform Fee | Share Dealing | Fund Dealing | ISA Fee | Best For |
|---|---|---|---|---|---|
| InvestEngine | £0 (DIY) | N/A (ETFs only) | N/A | £0 | Free ETF investing |
| Vanguard Investor | 0.15% (cap £375) | £7.50 | £0 | Included | Vanguard fund investors |
| Trading 212 | £0 | £0 | N/A | £0 | Commission-free trading |
| interactive investor | £11.99/month | £3.99 (one free/month) | £3.99 | Included | Flat fee (large portfolios) |
| Hargreaves Lansdown | 0.45% (cap £45/shares) | £11.95 | £0 | Included | Research, fund selection |
| AJ Bell | 0.25% (cap £3.50/shares) | £5.00 | £1.50 | Included | Mid-cost balanced option |
| Freetrade | £0 (basic) | £0 | N/A | £5.99/month | Free share trading |
| Nutmeg | 0.45–0.75% | N/A (managed) | N/A | Included | Robo-advisor |
Fee Comparison by Portfolio Size
| Portfolio Size | InvestEngine | Vanguard | interactive investor | Hargreaves Lansdown | AJ Bell |
|---|---|---|---|---|---|
| £10,000 | £0 | £15 | £144 | £45 | £25 |
| £25,000 | £0 | £37.50 | £144 | £112.50 | £62.50 |
| £50,000 | £0 | £75 | £144 | £225 | £125 |
| £100,000 | £0 | £150 | £144 | £450 | £250 |
| £250,000 | £0 | £375 | £144 | £450 | £350 |
| £500,000 | £0 | £375 | £144 | £450 | £350 |
InvestEngine has no platform fee for DIY investing. For portfolios over ~£50K, flat-fee platforms become better value than percentage-based.
Account Types Available
| Account | Tax Treatment | Annual Limit | Who Needs It |
|---|---|---|---|
| Stocks & Shares ISA | Tax-free growth and income | £20,000/year | Everyone |
| Lifetime ISA (LISA) | 25% government bonus + tax-free | £4,000/year (counts toward ISA limit) | First-time buyers or retirement |
| SIPP (Pension) | Tax relief on contributions | £60,000/year | Long-term retirement saving |
| Junior ISA | Tax-free for children | £9,000/year | Parents/guardians |
| General Investment Account | Capital gains & dividend tax apply | No limit | After maxing ISA |
Best Platforms by Investor Type
| Investor Type | Best Platform | Why |
|---|---|---|
| Beginner / first-time | InvestEngine or Vanguard | Simple, low-cost, good education |
| Passive index investor | Vanguard Investor | Cheapest for Vanguard funds |
| ETF-only investor | InvestEngine | Completely free (DIY) |
| Active share trader | Trading 212 | Commission-free trades |
| Large portfolio (£100K+) | interactive investor | Flat fee = best value |
| Wants everything (funds, shares, research) | Hargreaves Lansdown | Widest selection, best tools |
| Hands-off (robo-advisor) | InvestEngine (managed) or Nutmeg | Automatic portfolio management |
Bottom Line
For most UK investors, InvestEngine (free ETF investing) or Vanguard Investor (cheapest for Vanguard funds) is the best starting point. Always invest inside a Stocks & Shares ISA to shelter gains from tax. As your portfolio grows past £50K–£100K, consider a flat-fee platform like interactive investor. The worst thing you can do is wait — start investing today with whatever amount you have.
For related guides, see Stocks & Shares ISA guide, how to start investing in the UK, and best index funds UK.