The one-line version
This is education, not personal advice. All three are ways to own a basket of investments instead of single shares. They mostly differ in how they're priced and traded, not in what they can hold. A beginner can own the entire world stock market through any of them.
Fund (OEIC / unit trust)
The traditional UK pooled fund. You buy and sell once a day at a single price calculated from what the fund holds; there's no live market price. Index "tracker" funds simply hold everything in an index in proportion. Simple, familiar, and ideal for automatic monthly investing — you don't watch a price, you just buy in.
ETF (exchange-traded fund)
A fund that is itself listed on a stock exchange, so it trades all day at a live price like a share. Most beginner-relevant ETFs are low-cost index trackers — often the cheapest way to own a global index. The trade-offs vs a fund are minor for a long-term beginner: a live price you can ignore, and platform charges that may differ (some platforms charge per ETF trade but cap ETF custody fees). Depth in the UK ETF guide.
Investment trust
A company whose business is holding investments, with its own shares listed on the exchange. Two features make it different — and more advanced:
- Premium/discount. Its share price can sit above or below the value of what it owns (its net asset value), so you might pay more or less than the underlying worth.
- Gearing. It can borrow to invest, which amplifies both gains and losses.
That flexibility can be powerful but adds risk and judgement, which is why it's usually not the beginner's first holding. The advanced comparison is in investment trusts vs ETFs.
Side by side
| Fund (OEIC) | ETF | Investment trust | |
|---|---|---|---|
| Priced | Once a day | Live, all day | Live, all day |
| Can trade above/below asset value? | No | Barely (tight) | Yes (premium/discount) |
| Can borrow to invest (gearing)? | No | No | Yes |
| Typical beginner use | Core index tracker | Core index tracker | Usually later, once experienced |
What actually matters for a beginner
Not the wrapper-vs-fund-vs-trust debate — these four things, in order:
- Use a tax wrapper (Stocks & Shares ISA or pension) — see the ISA guide.
- Be diversified — a global index, not a punt on one company or country.
- Keep costs low — the yearly fee (OCF) compounds against you exactly as returns compound for you.
- Pick the cheapest available form on your platform that you can buy automatically each month — fund or ETF, it's a detail next to the three above.
If you're at the very start, read how to start investing first; this page is just the "what are these words" companion to it.
FAQs
What is the difference between a fund and an ETF?
A traditional fund (UK: OEIC/unit trust) is priced once a day and bought/sold at that single price. An ETF is listed on an exchange and trades all day at a live price like a share. Both can track the same index and hold the same companies — for a beginner the practical differences are pricing and platform charges.
What is an investment trust and how is it different?
A listed company whose business is holding investments. With a fixed share count its price can trade at a premium or discount to the value of what it owns, and it can borrow to invest (gearing). That extra flexibility adds risk and complexity, so beginners are usually steered to a simple index fund or ETF first.
Which is best for a beginner — a fund or an ETF?
It barely matters: a single low-cost, broadly diversified global index tracker — as a fund or an ETF — is a complete starting portfolio. The bigger decisions are using a tax wrapper, keeping costs low, and staying diversified. Pick whichever is cheapest to hold on your platform and available as a regular monthly investment.
Do they get taxed differently in an ISA?
Inside a Stocks & Shares ISA, no — growth, dividends and interest are tax-free whichever form you hold. Outside a wrapper the treatment is broadly similar with minor product nuances; the ISA removes the question for most beginners.
Related guides and calculators
How to start investing — the beginner path this explainer supports. UK ETF guide — the deep ETF reference. Investment trusts vs ETFs — the advanced comparison. The complete UK ISA guide — the tax-free wrapper to hold any of them in. ETF model portfolios — example beginner holdings. Compound interest calculator — why low costs matter so much over time.
How UK Tax Drag holds itself to account
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