Best platform for large portfolios

Some fee structures work better those with smaller portfolios, while some benefit larger portfolio-holders. It really pays to know the difference.

check Fact Checked
  • By Clare West
  • Published: May 1, 2024
  • Edited by: Antonia Medlicott
  • Disclosure
  • Last Update: 4 days ago

My top picks

3.5/5

Freetrade – Commission-free trading and a free basic account that includes access to both a General investment account (GIA) is an account designed to provide access to investments. You may be liable for tax on any income or capital gains earned within a general investment account but this can be a useful vehicle for anyone who has maxed out their ISA allowanceGIAinfo and a Sometimes called an investment ISA, a stocks and shares ISA is an individual savings account that allows you to invest in shares, unit trusts, investment funds, and bonds. You will not need to pay tax on any income or capital gains earned on investments within an ISAStocks & Shares ISAinfo.

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Deposit at least £50 and get a free share worth between £10 and £100 (T&Cs apply)

Capital at risk.

5.0/5

InvestEngine – A zero-fee ISA, GIA and a very rare zero-fee SIPP. (Fund fees still apply) InvestEngine does only offer ETFs however.

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Welcome Bonus of up to £100

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Refer a friend and get up to £200 each T&Cs apply

With investments, your capital is at risk. This could mean the value of your investments goes down as well as up. T&Cs apply.

4.0/5

Robinhood – Robinhood only offers US stocks, and only in a General investment account (GIA) is an account designed to provide access to investments. You may be liable for tax on any income or capital gains earned within a general investment account but this can be a useful vehicle for anyone who has maxed out their ISA allowanceGIAinfo. But it does offer them very cheaply.

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Trade US stocks without commission or FX fees

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Capital at risk

Capital at risk.

4.5/5

XTB – No annual account fees and commission-free trading makes this platform particularly good for UK stocks.

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0% commission investing/trading

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4.25% AER on GBP uninvested funds held in a Flexible Stocks and Shares ISA

Capital at risk. CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 72% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.

3.5/5

Lloyds Bank – Economical for large portfolio-holders thanks to a flat fee structure. But beware high FX fees on international stocks.

  • Flat fees great value for high-net-worth investors

Capital at risk.


3.5/5

Freetrade

– Commission-free trading and a free basic account that includes access to both a General investment account (GIA) is an account designed to provide access to investments. You may be liable for tax on any income or capital gains earned within a general investment account but this can be a useful vehicle for anyone who has maxed out their ISA allowanceGIAinfo and a Sometimes called an investment ISA, a stocks and shares ISA is an individual savings account that allows you to invest in shares, unit trusts, investment funds, and bonds. You will not need to pay tax on any income or capital gains earned on investments within an ISAStocks & Shares ISAinfo.

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Deposit at least £50 and get a free share worth between £10 and £100 (T&Cs apply)

Capital at risk.

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Reasons to use

  • Unlimited commission-free trades
  • Zero subscription fees on Basic Account
  • No-fee ISA
  • No-fee GIA
  • Excellent 5.00% AER interest paid on uninvested cash up to £3,000 for Plus account-holders
  • Superb, easy-to-use app
  • Voted Best online trading platform six years running at the British Bank Awards
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Reasons to avoid

  • Mutual funds only available on paid accounts
  • FX fees are on the high-side unless you’re a Plus account-holder
  • Plus account costs £9.99 p/mo
  • Selection of stocks and ETFs on offer isn’t as large as some other providers
  • Just 1.00% interest paid on uninvested cash in the Basic account
  • App-only

Clare says

Freetrade does exactly what it says on the tin – offers free trading (and investing). If it serves your needs in terms of the investment assets they offer, and you stay away from US stocks where FX fees are on the high-side, then it’s possible to open either a general investment account or a Stocks & Shares ISA and buy and sell investments for zero fees. That’s no account fees, no subscription fees, and no trading fees.

That only applies if you stick with the free ‘Basic’ account, however. There are two other account types: Standard (£4.99 p/mo) and Plus (£9.99 p/mo). These come with better rates of interest on uninvested cash, lower FX fees (making US stocks more affordable), and access to mutual funds. And as these are flat-fee subscriptions, they are expensive if you’re only investing small amounts. If you have a large portfolio, however, flat fees can work out very good value for money, so they’re not necessarily a bad option.

But it’s the free account that makes Freetrade a staggeringly cheap way to build up an ISA or general investment account.

Use this if

You want to invest in UK or European shares or ETFs, and you’re looking for a simple, app-only Stocks & Shares ISA or general investment account.

Fees

  • Basic account is free
  • Unlimited, commission-free trading
  • Free ISA
  • Very cheap if investing in UK stocks or ETFs
  • Account minimum: £1
  • Need to pay for an account to access
    A self-invested personal pension (SIPP) is a type of private pension that allows you to control the specific investments that make up your pension fundSIPPinfo
  • FX fees a high 0.99% on free Basic account – makes buying US shares expensive

Account types

  • General investment account
  • Stocks & Shares ISA
  • Self-invested personal pension (SIPP) – only available with Plus account (£9.99 p/mo)

Investments

  • UK, European and US shares
  • Fractional shares
  • ETFs
  • REITs
  • Investment trusts
  • Treasuries (a form of UK government bond)

For a detailed analysis of Freetrade services, check out our review for 2025

Read full review

3.5out of 5

point Deposit at least £50 and get a free share worth between £10 and £100 (T&Cs apply)

5.0/5

InvestEngine

– A zero-fee ISA, GIA and a very rare zero-fee SIPP. (Fund fees still apply) InvestEngine does only offer ETFs however.

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Welcome Bonus of up to £100

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Refer a friend and get up to £200 each T&Cs apply

With investments, your capital is at risk. This could mean the value of your investments goes down as well as up. T&Cs apply.

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Reasons to use

  • No-fee ISA
  • No-fee SIPP
  • No-fee GIA
  • Choice of 830 ETFs
  • Easy way to invest in a ready-diversified fund
  • DIY and fully managed portfolios available
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Reasons to avoid

  • Only offers ETFs – no individual stocks or mutual funds available
  • SIPP only accepts transfers-in from Vanguard and Hargreaves Lansdown
  • No customer service live chat or telephone support

Clare says

InvestEngine regularly appears on our lowest-cost recommendation tables. There’s a no-charge Stocks & Shares ISA, a no-charge general investment account, and it is one of the only providers to also offer a no-charge A self-invested personal pension (SIPP) is a type of private pension that allows you to control the specific investments that make up your pension fundSelf-Invested Personal Pension (SIPP)info (ETF costs and charges still apply, as they do with every provider). That means, if you’re wanting a very low-cost personal pension or ISA, InvestEngine is definitely one to look at.

Where InvestEngine falls down is in its range of investment options – it only offers Exchange traded funds (ETFs) are traded in much the same way as stocks. Instead of an individual stock, however, you own a basket of different assets which track the performance of a particular index or market. Exchange-Traded Funds (ETFs)info. While these are a great option for anyone not wanting the responsibility of choosing individual stocks as they give you a diversified ‘basket’ of assets, they won’t be what everyone is looking for.

Because there are no individual stocks on offer, you don’t have to worry about A foreign exchange (FX) fee is added to all trades involving foreign currencies. If you buy a stock that trades in US dollars, for example, and your home account is in GB pounds, you’ll need to pay an FX fee.FX feesinfo either. There are charges if you want your portfolio managed for you, but they’re a very reasonable 0.25% per annum.

Use this if

ETFs appeal to you as a ready-diversified, easy investment option.

Fees

  • Zero account fees on ISA, SIPP, GIA and Business Account
  • 0.25% p/yr managed portfolio fee
  • Fund fees (applicable whichever provider you use) start at just 0.03%

Account types

  • General investment account
  • Stocks & Shares ISA
  • Self-invested personal pension (SIPP)

Investments

  • Exchange-Traded Funds (ETFs)

For a detailed analysis of InvestEngine services, check out our review for 2025

Read full review

4.0/5

Robinhood

– Robinhood only offers US stocks, and only in a General investment account (GIA) is an account designed to provide access to investments. You may be liable for tax on any income or capital gains earned within a general investment account but this can be a useful vehicle for anyone who has maxed out their ISA allowanceGIAinfo. But it does offer them very cheaply.

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Trade US stocks without commission or FX fees

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Capital at risk

Capital at risk.

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Reasons to use

  • Zero-commission trading
  • No A foreign exchange (FX) fee is added to all trades involving foreign currencies. If you buy a stock that trades in US dollars, for example, and your home account is in GB pounds, you’ll need to pay an FX fee.FX feesinfo when trading
  • Extremely low fees to convert currencies at deposit and withdrawal
  • 3.75% AER interest paid on uninvested cash
  • Trade US stocks 24 hours a day, 5 days a week
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Reasons to avoid

  • No ISAs – only a general investment account
  • Can only trade US stocks
  • All monies you pay in must be converted to USD
  • No personal pension

Clare says

This is undoubtedly a very cheap platform on which to trade US stocks. Possibly THE cheapest. The only fees you’re really paying are the 0.03% “third party” fees to convert your GB pounds into US dollars when you deposit money, and visa versa when you withdraw your funds (because all funds must be held in US dollars).

The major downside, however, is that there is currently no Stocks and Shares ISA, so you can’t protect your investment income from tax. (There’s also no personal pension account.) And there is no alternative to buying US stocks at present either: no ETFs, no mutual funds, and no stocks from the UK or rest of the world. That’s pretty limiting.

But if they offer the US stocks you want to invest in, then this is possibly the cheapest place you can buy and hold them.

Use this if

You want to trade US stocks as cheaply as possible.

Fees

  • Zero-commission trading
  • No account fees
  • No FX fees on trades
  • No withdrawal fees
  • T0.03% fee is an extraordinarily low rate for exchanging currencies at deposit and withdrawal

Account types

  • General investment account

Investments

  • US stocks

    Discover why Robinhood is a great option for US stock trading

    Read full review

    4.5/5

    XTB

    – No annual account fees and commission-free trading makes this platform particularly good for UK stocks.

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    0% commission investing/trading

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    4.25% AER on GBP uninvested funds held in a Flexible Stocks and Shares ISA

    Capital at risk. CFDs are complex instruments and come with a high risk of losing money rapidly due to leverage. 72% of retail investor accounts lose money when trading CFDs with this provider. You should consider whether you understand how CFDs work and whether you can afford to take the high risk of losing your money.

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    Reasons to use

    • Zero account fees
    • Commission-free trading (unless your monthly turnover is EUR 100,000+)
    • 4.25% AER interest paid on uninvested cash
    • Free trading on UK stocks
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    Reasons to avoid

    • 0.5% FX fees: it’s possible to find lower
    • Possible to find tighter spreads on CFDs elsewhere
    • Platform isn’t simple for beginners
    • Minimum trade size: £10

    Clare says

    XTB is has traditionally been a trading platform, so it is more complicated to use than the investment-focused platforms. (With a trading platform, there will be a wider range of tools for those trading more complex instruments to use. If you just want to open an ISA – they can get in the way and confuse things.)

    Having said that, XTB has done much in recent months to make it a more comfortable space for investors too. There’s a separate price list for those just interested in stocks and ETFs, which is a great idea, as once pricing involves CFDs, options or futures, things become a whole lot more confusing.

    And XTB is undoubtedly cheap. If you’re investing in non-UK assets, you’ll need to factor in a currency conversion rate that’s around about average (0.50%), but other than that, there’s almost nothing to pay. No account fees. No commission on trades (unless you’re trading over EUR 100,000 per month). And no withdrawal fees.

    Use this if

    You’re a large portfolio-holder wanting to mostly trade UK stocks.

    Fees

    • No annual account fees
    • 0% commission for buying/selling stocks & ETFs (unless you invest over £100k per month)
    • 0% commission for trading CFDs
    • 0.5% FX fee
    • Not always the tightest spreads
    • Inactivity fee: £10 per month after 12 months of inactivity

    Account types

    • Stocks and Shares ISA
    • General Investment Account

    Investments

    • UK stocks
    • US stocks
    • European stocks
    • Rest of World stocks
    • ETFs
    • Fractional investing
    • CFDs
    • Forex
    • Commodities
    • Indices
    • Cryptocurrencies

    Read Clare’s full review of XTB’s commission-free investing

    Read full review

    3.5/5

    Lloyds Bank

    – Economical for large portfolio-holders thanks to a flat fee structure. But beware high FX fees on international stocks.

    • Flat fees great value for high-net-worth investors

    Capital at risk.

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    Reasons to use

    • Flat fee of £20 per 6 months
    • Charge is waived for Private Banking customers
    • Charge is waived for 18-25 year olds
    • Funds just £1.50 to trade
    • International shares £0 to trade
    • No trading fees on anything if you set up a regular investment plan
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    Reasons to avoid

    • FX fees are very high: 1%
    • FX fees do not taper down with investment size
    • UK stock dealing fees: £11.00 per trade

    Clare says

    Lloyds can be very economical for large portfolio-holders thanks to its flat fee structure. A flat fee of £20 per 6 months is the equivalent of 0.04% on a £100,000 portfolio. And private banking clients (as well as 18-25 year olds) don’t even have to pay that admin charge at all.

    Where costs can add up at Lloyds, is through A foreign exchange (FX) fee is added to all trades involving foreign currencies. If you buy a stock that trades in US dollars, for example, and your home account is in GB pounds, you’ll need to pay an FX fee.FX feesinfo and dealing charges. Currency conversion fees of 1.00% are at the top end of the spectrum (Trading 212, at the other end of the spectrum, charges 0.15%), although Lloyds doesn’t charge any dealing fees on international stocks which allows you to claw back some of the losses there. UK stocks are a staggering £11.00 per trade. So buying a selling can get expensive. That said, Lloyds does waive all trading fees if you set up a regular investment plan with them, which is a really nice way around those potential costs.

    Use this if

    You are a high-net-worth investor and don’t plan to trade often. Or you’re happy to use the regular investment plan.

    Fees

    • Twice-yearly admin charge of £20.00
    • No admin fees for Premier and Private Banking customers
    • No admin fees for 18-25 year olds
    • No dealing fees on international shares
    • Reductions on costs for frequent investors
    • Regular investment plan eradicates dealing fees
    • Very high dealing fees on UK stocks – £11.00 per trade
    • High 1% FX fees on international stocks, that don’t reduce with size of investment

    Account types

    • Stocks and Shares ISA
    • Self Invested Personal Pension (SIPP)
    • General Investment Account (GIA)
    • Cash ISA
    • Junior ISA

    Investments

    • UK stocks
    • US stocks
    • European stocks
    • Rest of world Stocks
    • ETFs
    • Ready-made portfolios
    • Bonds and Gilts
    • Funds

    Read Clare’s full review of Lloyds Bank Share Dealing

    Read full review

    Brands rated from cheapest – most expensive

    Best for £500,000 portfolios


    Best for £1m+ portfolios


    Understanding fees


    Total fees may comprise of:

    • Service / Annual fees
    • Ongoing fund fees (for funds)
    • Dealing fees

    If you are buying stocks that are denominated in another currency from your own, you will also need to pay:

    • Foreign exchange (FX) fees

    There may be other costs, such as taxes and levies, that could also be applied, but we haven’t included these are they are applied universally, and don’t change between providers.

    What fee structures work best for large portfolios?

    Not every provider charges in the same way. Some providers use a flat-fee subscription model, while others charge fees as a percentage of the total value of your investments. Flat-fees tend to favour larger portfolio holders as they don’t increase, no matter how much your portfolio grows.

    Not many providers use a fixed fee model, but the following do:

    However, in recognition that large portfolio-holders will be paying a high price within percentage models, many percentage-based providers cap fees, which in effect turns those maximum fees into fixed fees. That can also make them good value for large portfolio-holders.

    Providers that apply a cap include:

    Other platforms offer reductions for large portfolios on their percentage fees.

    Extra costs

    It’s not just annual fees you need to factor in, however. Some providers offering low annual fees pile the costs on in other areas. As you’ll be able to see from the fee comparison charts, providers with the lowest annual fees often become high-cost providers when FX fees and/or dealing fees are taken into consideration.

    So, it’s important to understand all charges that are levied by providers when making a decision on where to invest.

    One other thing to bear in mind, is that dealing fees and FX fees are largely avoidable if you don’t trade often. A buy-and-hold strategy can keep those costs off your balance sheet, and has other advantages too. It avoids falling into the trap of trying to time the market, for example, something that has been consistently shown to be less effective than staying in the market over long periods.

    If you do plan to trade regularly, it’s worth asking if your provider offers a Regular Investment Plan, where money is automatically drip-fed into your account every month. In return for this commitment, providers will often waive or discount trading charges. Fidelity and AJ Bell offer this, for example.

    It’s not all about the fees


    Of course, fees aren’t the only consideration when selecting an investment provider.

    You’ll also need to think about:

    • If the provider offers the investable assets you want to hold
    • If the provider offers the account type you want to invest in (ISA, Junior ISA, SIPP, general investment account)
    • What customer service is like
    • Whether the platform is too complex for you, designed to suit new investors, or works for a range of experience levels

    We’ve assessed all these factors, and more in our full reviews. Simply select the brand name you want to explore from the main website menu.

    * Wondering whether we get paid for writing good things about platforms? Good question! It’s how many comparison sites get paid.

    The answer is – no, we proudly do things a little differently at Investing Insiders. Our sole criteria is what’s best for you – the consumer. So, although we do receive a commission if you choose to click through and open an account from any of our reviews, we will never bend our opinions to suit the requests of providers, or the needs of our bank balance. Bottom line – what you read on this page is what I’d recommend to my family, friends and colleagues, and indeed, what I choose for my own money.

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