The short version
- A UCITS ETF's investments belong to the fund, not the provider. A separate depositary holds them, and they can't be used to pay its creditors or the provider's.
- Your platform must keep your investments and cash separate from its own. If something is missing when it fails, the FSCS can pay up to £85,000 per person, per firm.
- Synthetic ETFs and securities lending add counterparty risk. UCITS rules cap it and require collateral.
- None of this protects you from market falls. If the shares an ETF owns fall, so does your ETF.
Part of ETF basics. New to ETFs? Start with what an ETF is and how it works.
- £85,000FSCS investment cover per person, per firm, for firms failing after 1 April 2019
- £120,000FSCS cover for bank deposits per person, per bank, from 1 December 2025
- 10%most a UCITS fund can have at risk with one bank in over-the-counter derivatives
Who holds what
Three firms stand between you and the shares your ETF owns.
- The fund provider, such as iShares or Vanguard, runs the fund and decides what it buys.
- The depositary keeps the fund’s investments safe and checks the fund is run by the rules. HSBC’s MSCI World ETF, for example, names HSBC Continental Europe as its custodian.
- Your platform holds your ETF units for you, often inside an ISA or SIPP.
Any of them could, in theory, fail. Different rules cover each one.
If the ETF provider goes bust
The large ETFs I checked for these guides, from iShares, Vanguard, HSBC and SPDR, are all UCITS funds based in Ireland. UCITS is the EU rulebook for funds sold to ordinary investors.
Under UCITS rules, a fund’s assets must be entrusted to a depositary for safekeeping. The depositary must hold them in segregated accounts in the fund’s name, so they can be identified as the fund’s.
The provider and the depositary can’t be the same company. The depositary must act solely in the interest of the fund and its investors.
So if the provider fails, the shares aren’t its to lose. They belong to the fund.
The depositary is covered too. If it becomes insolvent, the fund’s assets in its custody can’t go to its creditors. If it loses an investment it holds, it must return an identical one or its value without undue delay. The only exception is a loss caused by an external event beyond its reasonable control.
Providers also separate funds from each other. iShares’ factsheets say its Irish companies have segregated liability between their funds, so one fund’s debts aren’t another fund’s problem.
If your platform goes bust
FCA rules require a platform holding your investments to safeguard your ownership, especially if the firm becomes insolvent. It can’t use them for its own account without your express consent.
Cash waiting to be invested is client money. The platform must hold it in accounts kept separate from the firm’s own money.
If a platform fails, administrators take over and work to return clients’ assets, often by moving them to another firm. The FSCS explains that the costs of doing this come out of the clients’ remaining assets and money.
That’s where the FSCS (Financial Services Compensation Scheme) steps in. It can pay eligible customers up to £85,000 towards those costs and any shortfall. After the firm Beaufort failed, the FSCS says over £53 million of client money and £500 million of client assets were returned to new brokers.
What the FSCS does and doesn't cover
- Investments: up to £85,000 per eligible person, per firm, if an authorised firm fails and there’s a shortfall in the money or assets it held for you.
- Bank and building society deposits: up to £120,000 per person, per bank. The limit rose to that on 1 December 2025.
- Not covered: poor investment performance. The FSCS can’t compensate you because your investments fell in value.
The fund itself is a separate question. Overseas funds sold in the UK under the FCA’s Overseas Funds Regime must say if they’re not covered by the FSCS or the Financial Ombudsman Service. They must also explain any alternatives. For an Irish ETF’s own assets, the main protection is the UCITS rules above.
Counterparty risk: swaps and securities lending
A counterparty is the other side of a deal. ETFs take on counterparty risk in two main ways.
- Synthetic ETFs get their index’s return through a swap: a contract in which another firm, such as a bank, agrees to pay it. If that firm fails, the fund may not get what it’s owed.
- Securities lending means lending some of a fund’s shares to other firms for a fee. If a borrower doesn’t return them, the fund relies on collateral: assets the borrower handed over as security.
UCITS rules limit both. Exposure to one counterparty in over-the-counter derivatives can’t exceed 10% of the fund’s assets if it’s a bank, or 5% otherwise. Exposures from swaps and securities lending count together towards that limit.
Under ESMA’s guidelines, collateral must be highly liquid, valued at least daily, high quality, diversified and issued by someone independent of the counterparty. A fund must be able to recall lent shares at any time. All lending revenue, minus operating costs, must go back to the fund.
The physical vs synthetic guide explains how swaps work and how to tell which method a fund uses.
What none of this protects you from
All these rules protect you from firms failing. None of them protects you from markets falling.
If the shares an ETF owns drop 30%, your ETF drops by about the same. That isn’t a failure anyone compensates. The FSCS is clear it can’t accept claims for poor investment performance.
Even the safest-built fund carries this risk. iShares’ MSCI World factsheet still warns that your capital is at risk and you may not get back what you put in.
That’s the risk worth planning for. What happens to my ETFs in a stock market crash? looks at past falls and how long recoveries took.
A fall in an ETF’s price is only a paper loss until you sell.
How to check the protections
- The fund’s factsheet shows where it’s based, whether it’s a UCITS, its product structure (physical or synthetic) and often its custodian.
- The FCA register shows whether your platform is authorised. FSCS protection needs both the firm and the activity to be authorised.
- The platform itself: the FSCS suggests asking a firm what would happen to your money if something happened to its business.
Common questions
- Is my ETF covered by the FSCS?
- The FSCS covers firms failing, not markets falling. If your UK platform fails and investments are missing, you may be able to claim up to £85,000. The fund’s own assets are protected mainly by UCITS rules.
- What if I hold more than £85,000 on one platform?
- The limit is per person, per firm, and applies to what’s missing and the costs of returning your assets, not to everything you hold. Your investments should already be held separately from the platform’s own.
- Are synthetic ETFs riskier than physical ones?
- They carry counterparty risk that a physical fund mostly avoids, though a physical fund that lends shares carries some too. UCITS rules cap the exposure to any one bank at 10% of the fund’s assets.
- Does UCITS mean low risk?
- No. UCITS rules govern how a fund is built, spread and kept safe. A UCITS fund holding shares can still fall sharply.
- Can the depositary use the fund’s shares for itself?
- No. Under UCITS rules, it can’t reuse assets it holds in custody for its own account. Nor can any firm it delegates custody to.
This page explains how investor protection works. It isn't advice about what you should buy. Investments can fall as well as rise, and you may get back less than you put in. Read the full disclaimer.
Sources
- Directive 2009/65/EC (UCITS), Articles 22 and 52, EUR-Lex
- Directive 2014/91/EU (UCITS V), Articles 22, 24 and 25, EUR-Lex
- Guidelines on ETFs and other UCITS issues (ESMA/2014/937), European Securities and Markets Authority
- CASS 6.2: Holding of client assets, FCA Handbook
- CASS 7.13: Segregation of client money, FCA Handbook
- Investments, Financial Services Compensation Scheme
- What we cover, Financial Services Compensation Scheme
- Banks, building societies and credit unions, Financial Services Compensation Scheme
- Our work on special administrations, 26 September 2024, Financial Services Compensation Scheme
- Guide to investment protection, Financial Services Compensation Scheme
- Overseas Funds Regime: update for firms, Financial Conduct Authority
- iShares Core MSCI World UCITS ETF factsheet, September 2026, BlackRock
- HSBC MSCI World UCITS ETF monthly report, 31 August 2026, HSBC Asset Management
- FTSE All-World UCITS ETF (USD) Distributing, Vanguard
- SPDR MSCI All Country World Investable Market UCITS ETF factsheet, 30 September 2026, State Street Investment Management
Facts checked 13 October 2026.