One ETF on one page: what to read before you buy
Where to find the documents, what to look for in them and which questions to ask before you buy. No ETF recommended.
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Time: 30 minutes per ETF
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Find the right documents
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Similar names can mean different share classes with different costs. HMRC, for one, treats each share class as a separate fund.
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US prospectuses are on the fund’s website and the SEC’s EDGAR database. In the UK, you may get a KID or the new product summary.
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Under SEC Rule 6c-11, most US ETFs show their holdings every day, plus past premiums, discounts and bid-ask spreads.
What it does
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It tells you whether the fund tracks an index or picks investments, and how it does it.
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Investor.gov warns that over periods longer than a day, their results can be very different from their daily target.
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If they’re not in your currency, exchange rates move your returns too.
Costs and trading
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It comes out of the fund every year, so over time it compounds.
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The fee table in a prospectus doesn’t show the commissions you pay to buy or sell.
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It’s a cost each time you buy or sell. Most US ETFs show spread information on their website.
Risks
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In the US, they’re in the summary prospectus; an EU KID also gives a risk indicator from 1, the lowest, to 7, the highest.
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If a few holdings weigh a lot, your risk stays concentrated.
Distributions, domicile and tax
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In the US, dividends are taxable even when you reinvest them.
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It determines which fund rules apply, and it can change how you’re taxed where you live.
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Gains on offshore funds without reporting status are taxed as income, not as capital gains.
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Shares of a passive foreign investment company come with extra IRS reporting on Form 8621.
Before you buy
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ETF checked
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Good to know
- No ETF is recommended here: the list shows you how to read the documents, not what to buy.
- Rules differ by country. In the EU, funds sold to retail investors come with a KID; in the US, the prospectus and the fund’s website carry the key facts; in the UK, a new product summary is replacing the KID.
- Tax rules are as of September 30, 2026. For funds domiciled abroad, a tax professional can tell you how they’re taxed where you live.
Frequently asked questions
Where do I find an ETF’s prospectus?
On the fund’s website and, for US funds, also on the SEC’s EDGAR database. Your broker must give EU investors the KID before they buy.
What is the expense ratio?
The fund’s yearly running cost as a percentage of your money, taken out of the fund. Your broker’s trading fees come on top and don’t appear in the fee table.
Why can an ETF’s price differ from its value?
Because it trades on an exchange all day. The market price can sit above (a premium) or below (a discount) the net asset value of its holdings; most US ETFs show this history on their websites.
Next step
I’m not an accountant or a financial advisor. This is an estimate, for information only. Check with a professional before you decide.
- The calculatorCompound interest
- The checklistMonthly investing
- The short guideMonthly investing, simply explained
- The routeStarting to save
Sources
- Investor.gov (SEC) — Exchange-traded funds (ETFs): investor bulletin
- Investor.gov (SEC) — Mutual fund and ETF fees and expenses
- Investor.gov (SEC) — Leveraged and inverse ETFs
- SEC — Rule 6c-11: ETFs must post holdings, premiums, discounts and spreads (2019)
- European Commission — Key information documents for PRIIPs
- EUR-Lex — Delegated Regulation (EU) 2017/653: the risk indicator from 1 to 7
- FCA — PS25/20: final rules for consumer composite investments
- HMRC — HS265 Offshore funds
- HMRC — Offshore funds: list of reporting funds
- IRS — About Form 8621 (passive foreign investment companies)
- IRS — Publication 550, Investment income and expenses
To know whether an ETF fits you, talk to a qualified, independent financial advisor; for how it’s taxed where you live, a tax professional.