Choosing the right investment broker is one of the most important decisions you’ll make as an investor. The wrong choice can cost you hundreds — sometimes thousands — in unnecessary fees over time. This guide breaks down exactly what to look for and how the top UK brokers compare.
What to Look for in a Broker
1. Fees
Fees come in two forms:
- Platform fee — A percentage of your portfolio value, charged annually (e.g., 0.25% to 0.45%)
- Dealing charges — A fee per trade, typically £5 to £12 per transaction for funds, ETFs, or shares
A 0.45% platform fee on a £50,000 portfolio costs £225 per year. Switch to a flat-fee broker like Interactive Investor and you pay a fixed amount regardless of portfolio size — saving money once your pot grows past around £50,000.
Always calculate total annual cost, not just headline rates.
2. Investment Range
Not every broker offers the same products:
- Funds — Unit trusts, OEICs, and investment trusts
- ETFs — Exchange-traded funds covering global markets
- Shares — UK stocks on the LSE, plus US and international equities
- Investment trusts — Closed-ended funds traded on the stock market
- Bonds and gilts — Government and corporate debt
If you want access to everything, choose a broker with a wide range. If you only need a handful of tracker funds, a simpler (and cheaper) platform may be enough.
3. Ease of Use
- Is the app intuitive and well-designed?
- Can you set up regular investments easily?
- Is the web platform functional, or is the app better?
- How clear are reports, statements, and tax documents?
Beginners often prefer platforms with clean interfaces and guided onboarding. More experienced investors may prioritise research tools and customisation.
4. Customer Service
When something goes wrong — and eventually it will — you want responsive, helpful support. Check:
- Phone and chat availability (weekdays only vs. extended hours)
- Trustpilot and forum reviews
- Average response times
5. Platform Security
Every regulated UK broker must be authorised by the FCA (Financial Conduct Authority). Beyond that:
- FSCS protection covers up to £85,000 per person, per firm if the broker goes bust
- Look for segregated client money — your cash is held separately from the broker’s own funds
- Two-factor authentication and encryption are standard on reputable platforms
Never invest with an unregulated platform. If it’s not FCA-authorised, walk away.
Top UK Brokers Compared
| Broker | Platform Fee | Dealing Charge | Investment Range | Best For |
|---|---|---|---|---|
| Vanguard | 0.15% (capped at £375/yr) | Free for funds | Funds and ETFs only | Cheapest for passive fund investors |
| Hargreaves Lansdown | 0.45% | £11.95 (reduces with frequency) | Funds, ETFs, shares, trusts | Beginners wanting wide choice and research |
| AJ Bell | 0.25% | £5 (rising to £10 for less frequent trades) | Funds, ETFs, shares, trusts | Good all-round option with competitive fees |
| Interactive Investor | £12.99/month flat fee | Free for regular investments; £3.99 per trade | Funds, ETFs, shares, trusts | Larger portfolios (flat fee saves money above ~£50k) |
| FreeTrade | £0 (standard); £9.99/month (Plus) | Free | Shares and ETFs only | Best for hands-on share and ETF investors |
Vanguard
The cheapest option if you only need tracker funds and ETFs. The platform fee is capped at £375 per year no matter how large your portfolio, making it exceptional for buy-and-hold investors with sizeable pots. No share dealing — funds and ETFs only.
Hargreaves Lansdown
The most popular platform in the UK for good reason. Extensive research, a polished app, and a huge investment range. Fees are higher, but the user experience and educational content make it ideal for beginners learning the ropes.
AJ Bell
A strong middle ground — lower platform fees than HL, wide investment choice, and a decent app. Regular investments are free, which is a big plus for monthly savers. Good for investors who want flexibility without paying over the odds.
Interactive Investor
A flat monthly fee means you pay the same whether you hold £10,000 or £500,000. Once your portfolio exceeds roughly £50,000, the flat fee becomes cheaper than percentage-based platforms. Free regular investing is included.
FreeTrade
Commission-free share and ETF trading in a slick mobile app. The free tier covers everything most investors need. The Plus tier addsISA investing and research features. Not ideal if you want access to mutual funds or investment trusts.
What to Look For
- Low fees — Compare total annual cost, not just individual charges
- Good app — You’ll interact with it regularly; it should be pleasant to use
- Research tools — Commentary, screeners, and data help you make informed decisions
- Pension transfer support — If you want to transfer an existing pension, check the broker supports SIPP transfers and whether there’s a charge
Tips
- Start with Vanguard if you’re new — Low fees, simple interface, and a proven track record for passive investing
- Switch to flat fee when your portfolio exceeds £50k — Interactive Investor’s fixed cost becomes significantly cheaper than percentage-based fees at this threshold
- Don’t pay for features you won’t use — If you’re a passive investor, you don’t need a platform with expensive research tools
- Use ISAs where possible — Shelter your investments from capital gains and dividend tax by using your annual ISA allowance
- Check for transfer-out fees — Some brokers charge when you move your investments elsewhere, which can trap you if costs change
Getting Started
- Decide what you want to invest in (funds, ETFs, or individual shares)
- Estimate your portfolio size over the next five years
- Compare total annual cost on each platform for your situation
- Open an account, transfer in or deposit, and set up regular investments
The best broker is the one that fits your investing style, portfolio size, and budget — not necessarily the most popular or the cheapest headline rate.