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6 Best Online Brokers for Index Funds in the UK

Investing in index funds is a popular strategy and a smart way to build wealth passively. For investors who aim to diversify their portfolio and seek a cost-effective exposure to trading, choosing the best online brokers in the UK is crucial. A good broker offers low fees, a wide selection of funds, a user-friendly platform, and a seamless trading experience. 

In this article, we’ll explore the best online brokers in the UK for index funds investment and highlight their features, pricing, pros, and cons. 

Choosing the best UK index funds broker: 4 factors to consider

Fees or Charges

Understanding the pricing structure associated with a platform is vital, as trading fees can greatly impact a trader's profitability. Endeavour to look for online brokers to buy index funds that offer a transparent cost structure, low trading fees, and minimal account maintenance charges.

Diverse selection of index funds

Consider selecting a brokerage firm with a wide range of available index funds. This allows you to easily tailor your portfolio to your investment goals, effectively manage risk, and benefit from long-term market growth.

Customer support

A platform with reliable customer support ensures that traders can quickly resolve issues and access helpful guidance whenever needed. This is crucial for beginners needing help navigating the online broker platform or understanding advanced trading concepts.

Trading tools and platform usability

Pick a broker for index funds that aligns with your trading experience. Beginners should opt for an intuitive interface with good research tools and educational resources, while experienced traders should choose a platform with more advanced trading tools.

Top 6 online brokers to buy index funds for UK traders

Table of contents

  • eToro
  • Hargreaves Lansdown 
  • Interactive Investor
  • AJ Bell
  • Vanguard
  • Trading 212

eToro

eToro is a popular online brokerage known for its user-friendly platform and commission-free stock trading. It offers access to index funds through ETFs, making it an excellent choice for those who prefer a straightforward investment approach. With a low minimum deposit requirement, eToro appeals to beginners looking to get started with index investing.

Other innovative features offered by eToro include a social trading feature, allowing users to follow and copy successful investors' strategies; a smart portfolio, which enables users to easily follow premeditated trading strategies in achieving their investment goals; and investor program, which incentivizes experienced traders to allow newbie traders to emulate their trading strategies. These features make eToro an adequate investment solution for beginners and traders seeking a more hands-off investment approach.

Pros

  • Innovative social trading features
  • Access to a wide range of assets 
  • Reliable educational resources
  • Intuitive and easy-to-use platform

Cons

  • An inactivity fee applies after 12 months
  • Lacks advanced analytic tools

Fees and minimum deposit

Stock trading: $1 - $2 commission fee

ETF: zero commission fee

Minimum deposit: $10 ( 7.74 GBP)

Best for: social traders and beginner traders

Hargreaves Lansdown

Hargreaves Lansdown is one of the best index fund brokers in the UK. Founded in 1981, it boasts 40 years of experience helping users manage their investments. Its customer-centric approach features an easy-to-use platform and good educational resources.

It offers a wide range of index funds for investment, good research tools, and excellent customer service. Hargreaves Lansdown serves over 1.9 million clients today, with assets surpassing £155 billion. It also provides a currency exchange service, allowing customers to send money abroad easily.

Pros

  • Extensive funds selection
  • Strong research tools
  • Good customer service
  • User-friendly mobile and web platforms
  • Excellent educational resources

Cons

  • Higher fees than most competitors

Fees and minimum deposits

Annual charge: 0.1 - 0.45%

Dealing fees: £5.95 – £11.95

Currency conversion: 0.25-1%

Minimum deposit: £1

Best for: investors seeking a wide fund variety

Interactive Investor

Interactive Investor is a subscription-based index broker in the UK that offers a variety of trading accounts, such as ISAs, SIPPs, and general trading accounts. Founded in 1995, it has over 30 years of experience delivering excellent trading services. It has over £70 billion in assets and over 430 thousand customers.

Interactive Investor offers over 3000 funds, more than 1,000 ETFs, and over 600 investment trusts. It also has one of the most extensive educational resources, including articles, videos, and podcasts that offer in-depth market analysis and trends to guide the average trader. It features a transparent fee structure and is regulated by the Financial Conduct Authority (FCA), offering top-notch protection of user funds.

Pros

  • Transparent pricing
  • Good customer support
  • Excellent educational resources
  • Wide range of index funds

Cons

  • Complex for beginners
  • A monthly fee may not be cost-effective for infrequent traders

Fees and Minimum Deposit

Trading fees: £3.99

Monthly fee: Starts at  £4.99

Minimum deposit: None

Best for: Traders seeking a fixed-fee pricing option

AJ Bell

AJ Bell is a UK-based online stockbroker and investment platform. It is cost-effective and offers a wide range of investment options, including numerous index funds. AJ Bell is known especially for good retirement investments. It boasts over 500,000 customers and manages over £80 billion in assets.

AJ Bell caters both to retail investors and financial advisors in the UK. It offers low trading fees and a user-friendly interface, making it suitable for both experienced and novice traders. It provides good information materials, including podcasts, newsletters, and webinars to customers.

Pros

  • Wide range of investment options
  • User-friendly interface
  • Comprehensive educational materials
  • Good customer support

Cons

  • Limited advanced trading tools

Fees and Minimum Deposit 

Account charge: 0.25-0.10%

Dealing charge: Shares: £3.50 - £5.00 

Funds: £1.50

Minimum deposit: £1,000 

Best for: Retirement-focused investors

Vanguard

Vanguard is a leading broker for index funds, offering a wide range of investment products and services. Founded in 1975, it boasts 49 years of expertise and experience in helping investors achieve their financial goals. It currently has over 30 million clients worldwide.

It offers a low-cost, easy-to-navigate investment platform and a large selection of funds. It is known for its focus on passive trading, enabling users to easily diversify their portfolios. The platform was designed to suit long-term strategies.

Pros

  • Low-cost index funds
  • User-friendly platform 
  • Good customer service 
  • Extensive education resources 

Cons

  • Limited advanced trading tools

Fees and Minimum Deposit 

Stock: online- $0

Broker assisted: $25

ETF: online: $0 

Broker assisted: $25

Minimum deposit: none

Best for: Investors seeking a cost-effective platform 

Trading 212

Founded in 2024, Trading 212 is an online investment platform offering stock trading, ETFs, forex, and commodities. It is easy-to-use and has an intuitive interface suitable for all kinds of traders. Trading 212 is known for its commission-free trading on stocks and ETFs. The platform is regulated by the FCA and boasts over 2 million users and over €4 billion in customer assets.

Pros

  • Commission-free trading 
  • Access to a wide range of assets 
  • Availability of fractional fees
  • Easy-to-use platform 

Pros

  • Unreliable customer service 
  • Limited research tools

Fees and Minimum Deposit 

Trading commission: free

Minimum deposit: £1

Best For: Commission-free trading 

FAQs

Is it safe to buy index funds through online brokers?

Yes, purchasing index funds through online brokers is safe if you do so through a reputable broker. Ensure that the broker you choose is regulated, as this provides protection measures such as the Financial Services Compensation Scheme (FSCS).

How to start investing in index funds with online brokers in the UK? 

Below are the 6 simple steps required to begin your journey of investing in index funds

Step 1

Select a broker that aligns with your investment goals. 

Step 2

Open an account by completing the necessary process and verifying your identity.

Step 3

Deposit funds into your brokerage account using your preferred deposit method.

Step 4

On the platform, you can search for suitable index funds, such as the FTSE 100, S&P 500, or global index funds. 

Step 5

Place an order by entering the amount you want to invest. 

Step 6

Monitor your portfolio regularly and adjust your investment if necessary. 

Which online broker offers the lowest fees for index funds?

Trading 212 offers commission-free investing on stocks and ETF, making it a platform with the lowest fees for index funds 

How to invest in the S&P 500 index fund in the United Kingdom?

Below are 5 steps needed to invest in the S&P 500 index fund in the UK.

Step 1

Select a broker that provides access to S&P 500 index funds, such as Vanguard or AJ Bell

Step 2

Open and find your account 

Step 3

Search for S&P 500 index fund on the brokerage platform 

Step 4

Place your order with an amount of your choice

Step 5

Monitor your investment

Conclusion

Choosing the right index fund broker is necessary for a successful investment. Each platform has unique features that cater to the trading needs of different kinds of investors in the UK. eToro is ideal for social investing and copy trading, while Vanguard is best for cost-effective investments. Hargreaves Lansdown and Interactive Investor are the go-to platforms for good educational materials. AJ Bell is suitable for retirement investments, and Trading 212 offers commission-free trading.

Before choosing a platform, evaluate factors such as fees and the range of available index funds. This will enable you to pick a platform that aligns with your investment goals.