Platform and Fund Charges Explained

Ask most people what their investments cost and they will name the adviser fee. But the adviser fee is only the top layer. Underneath it sit two more charges that apply whether or not you use an adviser at all: the cost of the platform that holds your money, and the cost of the funds you hold on it. Together these make up your total cost of ownership, and because they are deducted quietly rather than invoiced, they are the charges people understand least and overpay most.

This guide lifts the lid on all three layers, explains what a platform charge and a fund’s Ongoing Charges Figure actually are, shows how the numbers stack up into an all-in cost, contrasts cheap passive funds with pricier active ones, and demonstrates why small percentages do such large damage over time. It pairs naturally with our overview of what a financial adviser costs, and as always it is information, not personal advice, investments can fall as well as rise.

The three layers of cost

Every pound you invest through an adviser typically passes through three separate charging layers. The adviser fee pays for advice. The platform fee pays for the technology and administration that holds your ISA, pension or general account. The fund charges pay the managers who run the underlying investments. Each is charged by a different party, each is a percentage of your money, and they add together into your true annual cost. Miss one and you will underestimate what you pay.

The important mental shift is from asking “what does my adviser charge?” to asking “what is my total cost of ownership?”. It is entirely possible to secure a keen adviser fee and still pay too much overall because the platform is expensive or the funds are dear, and equally possible for a slightly higher adviser fee to be excellent value if it steers you into a lean, low-cost portfolio. The layers interact, and the only honest measure is the sum of all three.

Platform charges

A platform is the online service that holds your investments and wraps them in a tax shelter such as an ISA or a Self-Invested Personal Pension. It is the shelf your funds sit on, and it provides the reporting, dealing and administration that keep everything in one place. For this it charges an annual fee, usually 0.15% to 0.45% of the money held, though some platforms cap the charge above a certain balance and others use flat monetary fees. On a £200,000 portfolio, a 0.30% platform charge is £600 a year, modest against the adviser fee, but real, and worth comparing.

Platform charges matter more as your pot grows, which is why capped or flat-fee platforms can become far better value for larger portfolios: a 0.30% percentage charge on £800,000 is £2,400 a year, where a capped platform might charge a few hundred pounds for the same service. If you are building wealth from scratch, our guide to how to start investing covers choosing a platform in more detail; the point here is simply that this layer exists, varies widely, and is one you can change by moving to a cheaper home for your money.

One word of caution: the cheapest platform is not automatically the best. Platforms differ in the range of investments they offer, the tax wrappers they support, the quality of their reporting and the ease of moving money in and out. A rock-bottom charge is little comfort if the platform cannot hold the funds you want or makes it painful to draw a retirement income. As with every layer of cost, the sensible question is value, not price alone, you want the cheapest platform that does everything you actually need, which is often not the cheapest platform on the market.

Fund charges: the OCF

The funds themselves are the second hidden layer, and usually the largest after the adviser fee. The standard measure is the Ongoing Charges Figure, or OCF, a single percentage that captures the fund manager’s annual fee plus the running costs of the fund. It is the number to compare when you want to know how expensive a fund is. A simple index tracker might carry an OCF of around 0.1%–0.2%; a specialist actively managed fund can run to 0.75%–1% or beyond.

That gap is enormous in percentage terms: an active fund can cost five to ten times as much to hold as a tracker. Sometimes the extra buys genuine skill or access to markets a tracker cannot reach; often it does not, and the higher charge simply drags on returns. The OCF lets you see the price before you judge whether it is worth paying, and it is disclosed for every regulated fund, so there is no excuse for not checking it. When an adviser recommends a fund, ask for its OCF as a matter of course.

A common surprise for investors is that a “multi-asset” or “managed” fund, marketed as a convenient all-in-one solution, can carry a chunky OCF that is easy to miss because it is bundled into a single product. The convenience is real, but so is the cost, and it compounds like every other charge. If you hold a ready-made portfolio, it is worth asking what its blended OCF actually is, the weighted average across everything inside it, because that single figure often matters more to your long-term return than the individual funds you fixate on. Cheaper is not always better, but expensive should always have to justify itself.

Transaction and other costs

Two smaller costs complete the picture. Transaction costs are what a fund incurs buying and selling its holdings, not included in the OCF but disclosed separately, and higher in funds that trade actively. And if your money is run by a discretionary fund manager, a professional who makes the investment decisions for you within an agreed mandate, there is an additional charge for that service, often around 0.25%–0.75% a year.

Neither is a reason for alarm, but both belong in your total, and both should appear on the annual cost statement your provider is required to send. A discretionary service can be worth the extra where portfolios are large or complex; on a straightforward portfolio it can be a layer of cost you do not need. As always, the question is not whether a charge exists but whether it is delivering value you could not get more cheaply: the same discipline that applies to the adviser fee itself.

Adding it all up

Stacked together, the layers produce a total cost of ownership that is often well above the headline adviser fee. Here is how a typical advised portfolio might look, and how much a lean, mostly-passive approach can save.

Passive vs active on cost

This is not an argument that active funds are never worth it, some are, in the right place, and a good adviser will use them selectively. It is an argument that cost is one of the very few things you can control with certainty, while future returns are not. A pound saved in charges is a pound kept, guaranteed; a pound spent chasing outperformance is a gamble that may or may not pay off. That asymmetry is why keeping the total cost low sits at the heart of sensible long-term investing, and why many portfolios now use low-cost trackers as their core and reserve active funds for the edges.

How charges eat returns

The reason all this matters is compounding. A charge is not a one-off nick; it is levied every year, and it is levied on money that would otherwise have gone on growing. So the damage from a high total cost snowballs. The difference between an all-in cost of roughly 1% and one of roughly 2% sounds trivial in any single year, but sustained across the decades of a pension, that extra 1% a year can absorb a substantial share of your eventual pot, quietly transferring tens of thousands of pounds from your retirement to the cost stack.

None of this means you should choose the cheapest option blindly; good advice and a sensible platform earn their keep, and the wrong fund at the lowest price is still the wrong fund. It means you should know all three layers, add them up, read your annual statement, and make sure every layer is delivering value. If you would like an independently vetted, FCA-regulated adviser to review your total cost of ownership, that is exactly the sort of question a good one will welcome, and one where a small change today can compound into a large difference over a lifetime of investing.

Common questions on fees & costs