Platform fee calculator

Compare what up to three investment platforms would cost you each year, in pounds, based on how much you hold and how you invest. Enter the charges from any platform's price list, or start from our example fee structures.

Uses 2026/27 rates and allowances · Figures checked against official sources on 11 October 2026

Your investing

Amount on the platform (£)Monthly regular investment (£)In shares, ETFs and investment trusts (%)The rest is in fundsOne-off trades a yearBuying or selling shares or ETFsAverage size of each trade (£)Trades in overseas shares (%)These usually carry a currency feeAverage fund charge, OCF (%)The same on every platformGrowth for the 10-year view (% a year)

Account fee typeAccount fee (% a year)Yearly cap on shares and ETFs (£)0 = no capFlat fee (£ a year)Dealing charge per trade (£)Regular investing charge (£ a month)Currency fee (%)

The three fee structures are illustrations with round numbers, not real providers. Replace them with the charges from any platform's price list to compare. Results update as you type, and nothing leaves your browser.

Yearly cost	Platform A	Platform B	Platform C

How to use the platform fee calculator

Enter how much you hold, how you invest and how often you trade, then put in the charges from up to three platforms' price lists. The calculator adds up what each would cost you in a year, in pounds and as a percentage of your balance, and projects the total over ten years. Platforms' own price lists usually set out every charge covered here, and the FCA expects them to show you the total cost in pounds and as a percentage before you invest.

What the calculator includes

Account fee: a percentage of your balance, or a flat yearly fee. Some percentage-fee platforms cap the fee on shares, ETFs and investment trusts but not on funds, so the calculator applies a cap only to that part.
Dealing charges on one-off trades in shares, ETFs and investment trusts.
Regular investing charges, often free or lower than one-off dealing.
Currency fees on overseas share trades, as a percentage of each trade.
Fund charges (the ongoing charges figure), which are the same wherever you hold the fund, so they're added to every column to show your full cost.

Which type of fee is cheapest?

It mostly depends on how much you hold. This table uses the three example structures with £200 a month of regular investing, 20% in shares and ETFs, four £1,000 trades a year and a quarter of them overseas:

Balance	Platform A	Platform B	Platform C
£10,000	£62 a year (cheapest)	£145 a year	£89 a year
£50,000	£202 a year	£145 a year (cheapest)	£149 a year
£150,000	£552 a year	£145 a year (cheapest)	£299 a year

Platform costs only, before fund charges. A percentage fee grows with your balance, while a flat fee stays the same, so the flat fee overtakes as you hold more. The point where they cross is roughly the flat fee divided by the percentage rate: £120 divided by 0.35% is about £34,300. Trading often shifts the answer towards platforms with low dealing charges, which is why it's worth entering your own habits.

What the calculator leaves out

Interest on cash. Some platforms keep part of the interest earned on uninvested cash. If you hold a lot of cash, check what each pays.
The spread between buying and selling prices on shares and ETFs, and stamp duty on UK shares.
Exit or transfer fees if you later move platform, and extra charges for pensions or drawdown.
Tiered fees, where the percentage falls on larger balances. Use an average rate for your balance.

Our guide to platform fees explains each charge in detail, and the compound interest calculator shows how a difference in yearly costs adds up over decades.

Sources

This calculator gives illustrations based on the figures you enter and the tax rules shown. It isn't personal financial advice. Our guides are general information and education, not personal financial advice. If you are unsure whether an investment is right for you, speak to a regulated financial adviser.