The short answer
- A platform is the online account where you hold your ISA, pension, funds and shares in one place: the wrapper and the investments are separate choices.
- Charges come in layers: platform fee, fund charge (OCF) and dealing costs. Compare total cost, not the headline rate.
- Percentage-fee platforms usually suit smaller pots; flat-fee platforms tend to win once you pass roughly £80,000–£120,000.
- Your investments are held separately from the platform and most are FSCS-protected up to £85,000 if the firm fails, but that never covers ordinary market falls.
An investment platform is the online account where you buy, hold and manage your investments in one place, your Stocks and Shares ISA, your personal pension, your funds and shares all sitting under one login. Think of it as the shop and the safe-deposit box combined: it is where you go to invest, and where your holdings live afterwards.
For most UK investors the platform is the single most important practical decision after “what do I invest in?”, because its charges quietly compound over decades, and because it determines what you can hold, how easily you can manage it, and how much admin lands on your desk. This guide explains how platforms work, what they cost in 2026, and how to weigh one against another. It is information, not personal advice, and remember that the value of investments can fall as well as rise.
What an investment platform actually is
A platform, sometimes called a “fund supermarket”, “investment shop” or “wrap”, is an online service, regulated by the Financial Conduct Authority, that lets you buy and hold investments through tax wrappers such as an ISA or a Self-Invested Personal Pension. Rather than opening a separate account with every fund manager, you hold everything on one platform, see a single valuation, and deal at the click of a button.
The platform does not usually decide what you invest in (unless you choose a ready-made option). Its job is custody and administration: it keeps your holdings safe and separate from its own money, collects your dividends, reclaims tax where relevant, handles ISA and pension rules, and gives you the tools to buy and sell. If you are completely new to this, our companion guide on how to start investing covers the building blocks before you pick where to hold them.
Crucially, the platform and the investments are two separate choices. You can hold a cautious, globally diversified fund or a basket of individual shares on the very same platform, the wrapper and the “shop” are neutral to what goes inside. That separation is what makes it worth comparing platforms on cost and service rather than on any single fund they happen to advertise.
What you can hold on a platform
Most mainstream platforms let you hold a broad range of investments inside your chosen wrapper. The typical menu looks like this:
- Funds, pooled investments (unit trusts and OEICs), including cheap tracker funds and actively managed funds.
- Exchange-traded funds (ETFs), funds that trade like shares on an exchange, popular for low-cost index tracking.
- Investment trusts, listed companies that invest in a portfolio on your behalf.
- Individual shares, UK and often overseas company shares.
- Bonds and gilts, government and corporate debt, on some platforms.
- Cash, uninvested money held in the account, sometimes paying interest.
The tax wrappers you can open usually include a Stocks and Shares ISA (£20,000 of contributions per tax year in 2026, with gains and income free of UK tax), a SIPP for pension savings, a Junior ISA for a child, and a General Investment Account for money that sits outside those allowances. Not every platform offers every wrapper or every investment type, so if you want, say, to trade individual US shares or hold a specific investment trust, check the range before you commit.
The wrapper is free: the tax break is not automatic
Opening an ISA or SIPP on a platform usually costs nothing extra beyond the platform’s normal charge, but the tax advantages only apply while your money stays inside the wrapper. Withdraw from a pension or move outside an ISA and different rules bite. Using your £20,000 ISA allowance each year is the simplest way most people shelter investment growth from tax.
How platform fees work
Platform charges are where the money quietly leaks, or doesn’t. There are several layers, and it pays to know each one, because a headline “low-cost” platform can still be expensive once dealing charges are added, and vice versa. The main charges you will meet:
Typical UK platform charges in 2026 (illustrative, always check the current rate card).
| Charge | What it is | Typical 2026 level |
|---|---|---|
| Platform / account fee | The core charge for holding your investments, percentage of assets or a flat amount | ~0.15%–0.45% a year, or a flat ~£4–£13 a month |
| Fund charge (OCF) | The fund manager’s own annual cost, deducted inside the fund, not the platform’s | ~0.10%–0.20% (trackers) to ~0.75%+ (active) |
| Fund dealing | Cost to buy or sell a fund | Often £0, sometimes ~£1–£10 |
| Share / ETF dealing | Cost to buy or sell shares, ETFs or investment trusts | ~£5–£12 per trade |
| Exit / transfer fee | Charge to move your account elsewhere | Mostly abolished; a few legacy accounts still apply one |
Two points catch people out. First, the fund charge (the OCF) is separate from the platform fee, you pay both, so a cheap platform holding expensive funds can still cost more overall than the reverse. Second, “percentage” platforms often cap the fee on shares, ETFs and investment trusts, which can make them surprisingly competitive for larger holdings. Total cost, not the headline platform rate, is what matters.
Flat fee vs percentage: which is cheaper?
This is the question that decides a lot of money over a lifetime. Percentage-based platforms charge a slice of everything you hold, so the bill grows as your pot grows. Flat-fee platforms charge a fixed amount no matter how large your portfolio, so the cost as a percentage shrinks as you build wealth.
Percentage-fee platform
- Cheaper while your pot is small, a small % of a small balance is little in cash terms
- Cost rises automatically as your portfolio grows
- Simple to understand: one rate on the whole balance
- Often better for beginners and regular monthly investors
- Watch for whether the fee is capped on shares and ETFs
Flat-fee platform
- Fixed cost regardless of size, the % you pay falls as you grow
- Usually wins for larger pots (often past ~£80k–£120k)
- Predictable annual bill
- Dealing charges may be higher, so less ideal for very frequent trading
- Great for buy-and-hold investors with substantial balances
A worked feel for it: on a £30,000 pot, a 0.25% platform costs about £75 a year while a £120-a-year flat fee costs more. Flip to a £250,000 pot and the same 0.25% is £625 a year, while the flat fee is still ~£120, a difference of roughly £500 every year, compounding as your investments grow. That is why many investors start on a percentage platform and move to a flat-fee one as their wealth builds. There is no exam here: total ongoing cost, weighed against the service and tools you actually use, is the honest test.
How to choose a platform
Beyond price, platforms differ in range, usability and service. Work through this short checklist before you open an account or transfer one in:
- 1
Total cost for your pot
Add the platform fee, the fund charges and realistic dealing costs for how you actually invest, then compare like for like at your current and expected balance.
- 2
Wrappers and investments offered
Confirm it offers the wrappers you need (ISA, SIPP, JISA, GIA) and the investments you want, funds, ETFs, shares or investment trusts.
- 3
Ready-made options
If you don’t want to pick investments yourself, check whether it offers sensible ready-made portfolios or a shortlist of recommended funds.
- 4
Ease of transfer
Check that moving in an existing ISA or pension is straightforward, and whether the old provider charges an exit fee.
- 5
Service and security
Look at customer-service reputation, the quality of the app, and confirm the firm is FCA-authorised and FSCS-covered.
- 6
Interest on cash
If you tend to hold cash between investments, check what interest (if any) the platform pays and whether it keeps a share of it.
One habit worth keeping: cost matters, but the cheapest platform is not automatically the right one if it lacks the wrapper you need or makes you trade in a way that racks up dealing fees. If you are also weighing whether to pay for professional help, our guides on whether a financial adviser is worth it and what a financial adviser costs put platform charges in the wider context of advice fees.
DIY, ready-made or advised?
Platforms serve three broad audiences, and knowing which you are makes the choice much simpler:
- Do-it-yourself investors pick their own funds and shares on an execution-only platform. Cheapest, but you carry all the decisions and the discipline.
- Ready-made investors choose a risk-rated portfolio built by the platform: a middle path that keeps costs modest while removing the fund-picking.
- Advised investors use a financial adviser who recommends both the wrapper and the investments, often on a platform the adviser uses. Advice typically costs around 0.5%–1% a year on top of platform and fund charges.
There is no single right answer: it depends on your confidence, the complexity of your finances and how much you value having a professional in your corner. Larger portfolios, retirement drawdown, pension consolidation or ethical mandates are exactly the situations where advice tends to earn its keep; if that is you, our overview of ethical and sustainable investing shows how a values-led approach can sit inside any of these routes. Vetted Wealth’s own service is free to use and matches you with independently vetted, FCA-regulated advisers: it is a way to find help, not advice in itself.
The platform and the investments are two separate choices, comparing them together, on total cost, is where good decisions are made.
Is my money safe?
This is the question that worries most people, and the reassurance is genuine. UK platforms must keep your investments ring-fenced from their own business, a rule called client-asset segregation. Your funds and shares are held in nominee accounts that legally belong to you, not to the platform, so if the platform went bust its creditors could not claim them. In practice your holdings would be transferred to another provider.
On top of that, most platforms are covered by the Financial Services Compensation Scheme (FSCS), which can pay up to £85,000 per person, per authorised firm, if the provider itself fails and money is actually lost through that failure. Note two limits: the FSCS does not cover ordinary investment losses, if a fund falls in value, that is investment risk, not a claim, and the £85,000 applies per firm, so very large portfolios are sometimes spread across providers. Always check a platform is authorised on the FCA register before you send money.
Protection covers failure, not falling markets
The FSCS safety net applies if the platform or provider fails, not if your investments simply drop in value. Markets rise and fall; that is the nature of investing, and no compensation scheme insures against it. This is information, not personal advice.
Common questions
Is my money safe on an investment platform?
Your investments are held separately from the platform’s own money (this is called client-asset segregation), so if the platform fails your holdings still belong to you. On top of that, most UK platforms are covered by the Financial Services Compensation Scheme, which protects up to £85,000 per person per authorised firm if the provider itself goes bust and money is lost. That protection does not cover ordinary investment losses, funds and shares can still fall in value. This is information, not personal advice.
Are flat-fee or percentage-fee platforms cheaper?
It depends on how much you hold. Percentage-fee platforms (often around 0.25%–0.45% a year) tend to be cheaper for smaller pots because a small percentage of a small balance is a small number. Flat-fee platforms charge a fixed monthly or annual amount regardless of size, which usually wins once your portfolio runs into the low-to-mid six figures. A rough crossover point is often around £80,000–£120,000, but it varies by provider and by the funds you hold.
Can I move my ISA or pension to a different platform?
Yes. You can transfer an ISA or a personal pension from one platform to another without losing the tax wrapper: the key is to ask the new provider to arrange the transfer rather than withdrawing the money yourself. Most exit fees have been scrapped, though some older accounts may still charge to move out. Transfers can be done “in specie” (moving the actual investments) or as cash; cash transfers mean a short spell out of the market.
In summary
- A platform is the online account where you hold your ISA, pension, funds and shares in one place: the wrapper and the investments are separate choices.
- Charges come in layers: platform fee, fund charge (OCF) and dealing costs. Compare total cost, not the headline rate.
- Percentage-fee platforms usually suit smaller pots; flat-fee platforms tend to win once you pass roughly £80,000–£120,000.
- Your investments are held separately from the platform and most are FSCS-protected up to £85,000 if the firm fails, but that never covers ordinary market falls.
- You can transfer an ISA or pension between platforms without losing the tax wrapper; ask the new provider to arrange it.
Sources and further reading
- Investing basics MoneyHelper
- Check the Financial Services Register Financial Conduct Authority
- Individual Savings Accounts GOV.UK
Common questions on investing
Ready to speak to a vetted investment management specialist?
This guide is free information, not personal advice. When you’re ready, we’ll match you with an established, independently vetted, FCA-regulated specialist in investment management, free, and with no obligation.
