How UK Investment Platforms Work 2026/27 — Custody, Nominee & FSCS

What a UK investment platform is

An investment platform is the online service that holds your Stocks & Shares ISA, SIPP or General Investment Account. It's the custodian — the intermediary between you and the fund managers, stock exchanges and pension providers whose products you buy.

Popular UK platforms: Hargreaves Lansdown, InvestEngine, AJ Bell, Interactive Investor, Vanguard Investor UK, Fidelity, Trading 212, Freetrade. Each solves the same basic problem — hold your investments, execute your trades — differently.

How your money is held

• Nominee ownership. Legally, your investments sit in a "nominee" account — a legal structure separating your assets from the platform's own balance sheet. If the platform goes bust, your investments aren't part of its bankruptcy estate.
• Client money rules. UK-authorised platforms must ring-fence uninvested cash in separate FCA-regulated bank accounts.
• FSCS investment cover. £85,000 per person per platform for scenarios where the platform fails and can't return your assets. Not the same as savings FSCS — this covers investment claims.

See our FSCS protection guide for the parallel savings rules.

What actually happens when you press "buy"

1. You place an order via the platform's app or website.
2. Platform routes the order — funds go to the fund manager for pricing at next daily NAV; ETFs and shares go to a stock exchange (usually LSE) via a broker.
3. The trade executes.
4. Your platform records that you own that many shares/units.
5. The actual shares/units are held by the platform's nominee company at the underlying registrar (Computershare, Equiniti, Link).

You don't hold a paper share certificate. The registrar's records show your platform's nominee company. The platform's records show you. Both records must match — this is called "reconciliation" and is regulated.

How platforms make money

• Platform fees on your holdings (0%–0.45%).
• Dealing charges on trades.
• FX spreads on non-GBP trades.
• Interest on uninvested cash balances (platforms usually keep some of the interest, pay you some or none).
• Fund manager rebates (rare on modern UK platforms since 2013 RDR).

Trading 212's model relies heavily on FX and cash spreads. InvestEngine on managed portfolio fees. HL on percentage platform fees. Each has trade-offs.

Wrapper types you can open

• Stocks & Shares ISA — tax-wrapped investing, £20,000 annual allowance.
• SIPP — pension wrapper, £60,000 annual allowance, locked until 55/57.
• Lifetime ISA — 25% government bonus wrapper (age-restricted).
• Junior ISA — for a child, £9,000 annual allowance.
• Junior SIPP — for a child, £2,880 annual gross contribution.
• Dealing Account (GIA) — no tax wrapper, no allowance limit.

Not every platform offers every wrapper. Vanguard Investor UK doesn't do LISA. InvestEngine doesn't do LISA. HL offers all six.

Trading mechanics — funds vs ETFs vs shares

• Funds (OEICs): Priced once daily. Order placed → executed at next NAV cut-off (usually noon or 3pm). No live price to worry about.
• ETFs: Live during exchange hours. Trade like shares. Bid-ask spread applies.
• Shares: Live during exchange hours. Stamp duty on UK share purchases (0.5%). Not on ETFs.

Consolidation and transfers

Every UK platform accepts transfers in from other platforms. Two methods:

• In-specie: Existing holdings move across intact. No market timing risk.
• Cash transfer: Existing holdings sold, cash moved, new positions bought. Out-of-market for the transfer period.

UK regulation prevents platforms charging exit fees on transfers. Some platforms charge for in-specie transfers of specific holdings (a few pounds per line). Most are free.

Common mistakes

• Assuming FSCS covers investment falls. It doesn't — it covers platform failure only. Losses from bad investments are yours.
• Ignoring platform fees. Over decades they compound significantly.
• Holding cash long-term on platforms that pay poor interest.
• Not understanding what's covered by FSCS.
• Choosing a platform based on brand awareness rather than fees and features.

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Frequently asked questions

Is my money safe on a UK investment platform?

Your investments are held in nominee structures separate from the platform's assets. Plus FSCS provides up to £85,000 investment cover per person per platform if the platform fails and can't return assets.

What happens if the platform goes bust?

Your investments are ring-fenced from platform creditors. Regulators would arrange transfer to another platform. FSCS covers any shortfall up to £85,000 per person.

Which UK platform is cheapest?

For DIY ETF portfolios, InvestEngine (0% platform fee) is cheapest. For funds, Vanguard Investor UK is cheapest on Vanguard-only portfolios. For larger pots, Interactive Investor's flat fee often wins.

Can I hold shares in multiple currencies?

Yes on most platforms. Some charge FX fees (Freetrade: 0.99% at free tier; Trading 212: 0.15%; HL: 1%). Watch for these.

How long do transfers between platforms take?

In-specie transfers: 2-8 weeks depending on complexity and cooperation. Cash transfers: usually faster but expose you to market movement in between.