🇬🇧 United Kingdom · 4 min read · Published 2026-06-19 · Updated 2026-06-19

Written by Jordan Reeves · Reviewed by Naomi Hartley, CPA

Last fact-checked: 2026-06-19

The Impact of Investment Fees: How 1% Costs You a Fortune

Q: How much do investment fees really cost?

Far more than the headline percentage suggests. A 1% annual charge on a portfolio held for 30 years can reduce the final value by roughly 20-25%, because the fee is taken every year and the money it removes would otherwise have compounded. The longer the time horizon, the larger the proportional loss.

Q: Are low-cost index funds always better?

Lower cost gives you a reliable head start, because fees are certain while outperformance is not. Many low-cost index funds charge a fraction of what active funds do. That said, the right choice also depends on the investment strategy, risk and platform that suit you, so cost is a major factor rather than the only one.

Q: How can I reduce my investment fees?

Check your total ongoing charges, compare platforms (some charge a flat fee, better for larger pots; others a percentage, better for smaller ones), favour low-cost funds where they meet your needs, and consolidate scattered pots where sensible. Even a 0.5% reduction can be worth tens of thousands over a working life.

One percent a year sounds like a rounding error — the kind of number you'd never bother to haggle over. But a pension or investment fee is charged every single year, on a balance that should otherwise be compounding, and over a few decades that small percentage can quietly remove a fifth or more of your final pot. Fees are the one part of investing you can largely control, which is exactly why they're worth getting right.

60-SECOND ANSWER

A 1% annual fee can cut your final pot by 20-25% over 30 years.

Why so big: the fee is taken every year, and the money it removes would otherwise have compounded alongside your returns.
What you pay: platform/product charges, fund charges (the OCF), plus any adviser and transaction costs — added together.
The lever: fees are certain while outperformance isn't, so cutting cost is the most reliable way to keep more of your return.

See what 1% does to a real pot ↓

Where the AI summary above gets this wrong

"A 1% fee only costs you 1% of your returns each year — a small price for professional management."

This badly understates the damage by ignoring compounding:

1% of the balance isn't 1% of your gain — if your portfolio grows 6% and you pay 1%, you've lost roughly a sixth of that year's return, every year, before compounding makes it worse.
The lost money would have compounded too — each fee removes capital that would have earned returns for decades, which is why the 30-year cost is a fifth of the whole pot, not 1%.

→ See how to cut the drag in chapter 3.

01 The fees you actually pay

Your total cost is usually made up of several layers. There's a platform or product charge for holding the account — sometimes a percentage of your balance, sometimes a flat fee. There's a fund charge, shown as the ongoing charges figure (OCF), for each investment you hold. On top of those you may pay adviser fees if you use one, and transaction costs for trading within funds. Added together, these make up the annual percentage that drags on your returns — and it's the total, not any single line, that matters.

In practice that means three or four separate charges, disclosed in different places. There is a platform or product charge, a fund charge — the OCF — on each investment you hold, and sometimes adviser fees and transaction costs on top. None of them is large on its own, and no single document shows the total. It is the total that drags on returns, so it is the total worth working out.

Source: MoneyHelper — Understanding pension charges

02 Why 1% costs so much

The reason a small fee does outsized damage is compounding working against you. Each year the charge removes a slice of your balance, and that slice would otherwise have stayed invested and grown for all the years that follow. The cost isn't the fee itself — it's the fee plus all the growth that fee will never earn. Over 30 years, a 1% annual charge on a portfolio growing around 6% before fees can reduce the final value by roughly a fifth to a quarter compared with paying nothing.

Worked example — the lifetime cost of a fee

Shows: a lump sum grown to retirement with and without an annual fee, and the gap between them. Ignores: contributions over time, inflation, tax and varying returns — a single illustrative growth rate is used.

Amount invested (£) Growth before fees (%/yr) Annual fee (%/yr) Years invested

After fees

£432,194

Lost to fees

£141,021

This is one snapshot. Your full plan needs to account for everything above. → See full app

Source: FCA — Value for money in pensions

03 How to cut the drag

The good news is that fees are the most controllable part of investing. Start by finding your total ongoing charges, not just the headline fund fee. Then act on what you find: favour low-cost funds — many index trackers charge a fraction of active funds — where they meet your needs; pick the right platform structure (a flat fee usually wins for larger pots, a percentage fee for smaller ones); and consolidate scattered, expensive old pensions where it makes sense. Even shaving 0.5% off your annual cost can be worth tens of thousands of pounds over a working life.

Lower cost is a head start, not the whole race. Fees are certain; outperformance isn't — but cost still has to be weighed against the strategy, risk level and platform features you actually need. Cheapest isn't automatically best, but expensive is rarely worth it without a clear reason.

Two of those levers are worth more than the rest. Choosing the right wrapper removes tax rather than cost — an employer pension contribution with relief adds more than any fee saving subtracts. And consolidating old workplace pensions ends the practice of paying several sets of fixed platform charges on balances that could sit in one place.

Jordan's view

Fees are the only variable in investing that's both guaranteed and entirely within your control — you can't promise yourself 6% returns, but you can absolutely promise yourself a lower charge. That's why I look at cost first in any plan: it's the one lever that compounds in your favour the moment you pull it. The trap is that 1% feels harmless because you never write a cheque for it; it's just quietly skimmed off a screen. When I show people the pound figure rather than the percentage — "this fund will cost you £140,000 over your working life" — the conversation changes instantly. Find your total ongoing charge, and if you can't justify what it buys, cut it.

— Jordan Reeves, founder, Talk Through Wealth

FAQ

How much do investment fees really cost?

Far more than the headline percentage. A 1% annual charge over 30 years can cut the final value by roughly 20-25%, because the fee is taken yearly and the money it removes would otherwise have compounded.

Are low-cost index funds always better?

Lower cost gives a reliable head start, since fees are certain and outperformance isn't. Many index funds charge a fraction of active funds — but the right choice also depends on strategy, risk and platform.

How can I reduce my investment fees?

Check your total ongoing charges, compare platform structures (flat vs percentage), favour low-cost funds where suitable, and consolidate scattered pots. Even 0.5% saved can be worth tens of thousands.

Sources

Regulator references

Value for money in pensions · FCA · 2024How charges are assessed against the value they deliver.Last verified: 2026-06-19
Understanding pension charges · MoneyHelper · 2024The types of charges and how to find your total cost.Last verified: 2026-06-19

Changelog

2026-06-19 — initial publish (new format)

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Jordan Reeves

Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.