Sustainable investing fees guide

A sustainable fund, exchange-traded fund (ETF), individual savings account (ISA) portfolio or pension can be credible and still be poor value. The comparison starts with one number: the total annual cost in pounds, including the platform, product, trading and service layers.

Start with the annual pound cost

The ongoing charges figure (OCF) on a fund factsheet is only one part of the bill. Add the platform fee, transaction costs, dealing charges, spreads, foreign exchange costs, advice or model-portfolio fees and any pension or wrapper administration. Keep one-off entry, exit and transfer charges separate so they do not disappear inside an annual percentage.

Write each percentage as a pound amount at the balance you actually expect to hold. A 0.25% platform fee is £25 a year on £10,000 and £250 on £100,000 before the fund charge is added. A flat £120 account fee works in the opposite direction: it is 1.2% of £10,000 but 0.12% of £100,000.

This does not reveal which investment is suitable, but it does expose a common comparison error. A low-cost sustainable ETF can become expensive when frequent dealing and platform charges are added. A higher-cost active fund may provide deeper research or stewardship, but those benefits still have to earn the difference.

Build the complete fee stack

The Financial Conduct Authority's current disclosure categories separate one-off entry and exit costs, ongoing costs and transaction costs. Performance fees and carried interest are assessed separately where relevant. Product documents may present these figures differently from a platform tariff, so the reader still has to combine the two.

Worked examples: three routes to the all-in cost

The examples below are illustrations, not current provider quotes or recommendations. They show why the same headline fund charge can produce a different result once account size and trading pattern are included.

Do the same calculation at today's balance and at a plausible future balance. Include regular contributions, because a percentage platform fee grows with the account while a flat fee does not. Then repeat the exercise for the cheapest credible alternative that offers the exposure and service you need.

Keep the recurring annual percentage beside the annual pound total. The percentage makes products easier to compare, while the pound figure shows the cost at your balance. Entry, exit and transfer charges should sit on a separate line with the period over which you expect to hold the investment. Otherwise a large one-off charge can look smaller than it is.

Adjust for the way you invest

ETF buyers need one extra check. The OCF does not include the bid-offer spread, and it does not show whether the fund has tracked its index efficiently. A narrow climate theme can also trade less frequently than a broad market fund. Compare the index rules and tracking difference as well as the published charge.

Pension comparisons are different again. A greener self-select fund may alter charges, risk, asset allocation or guarantees. Employer contributions and legacy benefits can outweigh a small fee difference, so a transfer should never be reduced to a cost table. The green pension funds guide sets out the wider checks.

What should a higher sustainable fee buy?

A higher fee is not automatically wrong. It may support specialist research, meaningful active ownership, access to a strategy that a cheap tracker cannot provide, stronger reporting or a service that helps the investor make better decisions. Vague green branding, a fashionable theme or a portfolio that barely differs from a cheaper sustainable fund is much weaker evidence.

For a higher fee to be credible, look for at least one of these evidence layers:

• Different holdings: the portfolio is materially different from a cheaper mainstream fund or index.
• Clear exclusions: the fund states what it excludes and the thresholds used. The fossil-free funds guide shows why definitions matter.
• Stewardship evidence: voting, engagement and escalation records are visible enough to assess, especially where a fund makes stronger ESG (environmental, social and governance) or impact claims.
• Impact or transition reporting: the fund explains outcomes or progress, not only intent.
• Useful service: the platform or manager gives tools, disclosure or support that changes the reader's decision quality.

The fund factsheet checklist helps test whether those claims appear in the documents rather than the marketing. If the provider cannot explain what the extra fee buys, the charge is simply a larger drag on returns.

Review the cost once a year

• Recalculate the annual pound cost using the current balance.
• Check for changes to the platform tariff, fund OCF, transaction-cost disclosure and advice fee.
• Look for cheaper share classes or a comparable ETF, but compare exposure and service rather than price alone.
• Check whether regular dealing, foreign exchange or dividend reinvestment creates avoidable charges.
• Confirm that the holdings, exclusions, Sustainability Disclosure Requirements label, stewardship and reporting still support the original claim.
• Record one-off exit or transfer costs before moving, especially for a pension or a product with guarantees.

For the product choice around that calculation, use the guides to green investment platforms, sustainable funds and sustainable ETFs. The fee guide answers whether the cost stack is clear and defensible. It does not decide whether an investment is suitable for a particular person.

Useful source links

• FCA Handbook: costs and charges information
• FCA review of investment-platform costs and charges
• MoneyHelper: investment fees and charges
• FCA: sustainable investment labels and anti-greenwashing
• FSCS: what protection covers