Custodian Banks vs Fund Administrators: What HNW Investors Need to Know

When a high-net-worth investor places assets with a private bank or an investment manager, a set of infrastructure questions rarely gets discussed in the client meeting: who actually holds the securities? Who reconciles positions each day? Who confirms that the assets in the portfolio are legally separated from the assets of the bank itself? The answers involve a specialist layer of financial infrastructure — custody and fund administration — that underpins the safety and operational integrity of institutional and private wealth management.

Safekeeping: what a custodian does

A custodian bank is a financial institution that holds securities and other financial assets on behalf of clients for safekeeping. The custodian's core function is not investment — it is the legal and operational holding of assets, record-keeping, and the processing of corporate actions and settlement.

Key custodian functions include:

• Safekeeping: holding securities in segregated or nominee accounts, ensuring they are legally separated from the custodian's own assets.
• Settlement: processing the delivery of securities against payment (DvP) when trades are executed.
• Corporate action processing: collecting dividends and interest, processing rights issues, proxy voting administration.
• Reporting: providing regular valuations, transaction confirmations, and portfolio statements.
• Tax services: withholding tax reclamation, tax reporting (including CRS/FATCA reporting for international clients).
• FX services: converting dividends and income received in foreign currencies.

Custodians do not make investment decisions. They do not execute trades (other than to settle trades instructed by the investment manager). They are the passive but essential operational layer beneath active portfolio management.

Fund administrator: the back-office for funds

A fund administrator performs a different set of functions, primarily for collective investment vehicles (funds) rather than individual client accounts:

• NAV calculation: computing the fund's net asset value, typically daily.
• Transfer agency: maintaining the register of investors (unitholders/shareholders), processing subscriptions and redemptions.
• Regulatory reporting: preparing and filing regulatory documents on behalf of the fund.
• Investor services: processing investor documentation, AML/KYC onboarding, distribution statements.

For private clients investing in funds (UCITS, AIF, private equity vehicles), the fund administrator is responsible for the accurate calculation of the value of your holding. If an incorrect NAV has been struck and trades have occurred at that price, the administrator is liable to investigate and, in egregious cases, compensate.

The distinction: a custodian holds assets; a fund administrator calculates values and manages investor records. A fund will typically have both — a custodian (or depositary, for UCITS and AIFs) and a separate administrator. These functions are frequently segregated between different firms to provide independent oversight.

Depositary: the UCITS and AIFMD version of custody

Under European regulation — the UCITS Directive and the Alternative Investment Fund Managers Directive (AIFMD), which remain relevant to UK funds post-Brexit under equivalent UK legislation — every UCITS fund and most alternative investment funds must appoint a depositary. The depositary's duties go beyond simple custody:

• Safekeeping of financial instruments in custody.
• Oversight: monitoring the fund manager's compliance with fund rules and the prospectus.
• Cash flow monitoring: ensuring cash flows are properly tracked and unexplained cash movements are investigated.

Depositaries carry strict liability for lost financial instruments (with very limited defences). This makes the depositary layer a meaningful investor protection.

Prime brokers: custody for hedge funds

Prime brokers serve hedge funds and other sophisticated trading vehicles. They provide a bundled service combining execution, custody, securities lending, margin financing, and risk reporting under one roof. The custody function of a prime broker is broadly equivalent to a custodian but is embedded in a broader trading relationship.

For private clients, the distinction matters in one specific context: if you invest in a hedge fund that uses a prime broker for custody, the prime broker's financial health is relevant to the safety of the fund's assets. UCITS and AIFMD rules require depositaries (not prime brokers) to act as custodians, with strict liability. Unregulated fund structures with prime broker custody carry additional risk.

CASS: UK client asset protection

The FCA's Client Assets Sourcebook (CASS) is the primary UK regulatory framework governing the protection of client assets held by FCA-authorised firms. Key principles:

Segregation: client assets must be held in accounts clearly segregated from the firm's own assets. Commingling client and firm assets is prohibited.

Record-keeping: firms must maintain accurate, complete, and reconcilable records of client assets at all times.

Reconciliation: daily reconciliation of client asset records against third-party (custodian/depository) records, with procedures for resolving breaks.

Insolvency protection: in the event of the firm's insolvency, client assets should not be available to general creditors. A CASS administrator is appointed to manage the return of assets to clients.

CASS applies to UK-authorised investment firms and custodians. For offshore structures (Channel Islands, Cayman, Luxembourg), equivalent local regulation applies — but standards vary. When selecting a custodian or investment manager, understanding the applicable client asset protection regime is important.

Global custodians and sub-custody chains

Global custodians are large banks (typically BNY Mellon, State Street, J.P. Morgan, Clearstream, and Euroclear) that hold assets across multiple markets using a network of local sub-custodians. A UK private bank acting as custodian for its clients may itself use a global custodian to hold the underlying securities.

The sub-custody chain:

Client → UK private bank (nominee account) → Global custodian → Local sub-custodian → Central Securities Depository (CSD)

Each link in this chain involves credit and operational risk. The ultimate safety of the client's assets depends on the entire chain performing its record-keeping and segregation obligations correctly.

In most major markets, assets held in the central depository (Euroclear, Clearstream, DTC in the US, Crest in the UK) are registered in the name of the global custodian or sub-custodian on behalf of the ultimate investor. The legal interest belongs to the investor; the chain simply facilitates record-keeping and settlement.

For very large portfolios (above £10–20 million), some private clients arrange direct custody relationships with global custodians rather than relying on a chain of intermediaries. This reduces operational risk but requires more administrative infrastructure.

Cost structure for HNW portfolios

Custody and administration costs are typically expressed as an annual basis-point charge on assets under custody:

• Retail-level custody (through a standard investment platform): 10–30 basis points per annum plus transaction fees.
• Private bank custody (relationship-managed, bundled with advisory service): often included within the overall private banking fee of 50–100 basis points per annum; direct custody component rarely disclosed separately.
• Institutional / family office custody (direct relationship with a global custodian): typically 2–10 basis points per annum for a portfolio above £50 million, with additional transaction fees.

For portfolios above approximately £5 million, it is worth requesting a detailed breakdown of custody costs from your private bank or investment manager. The bundled fee structures common in private banking can obscure the actual cost of custody services.

Key questions for HNW clients to ask

1. Who is the custodian of my assets — and is there a sub-custody chain?
2. How are my assets segregated from the firm's own assets?
3. What protection does the applicable regulation (CASS, Guernsey FSC, Cayman CIMA) provide in the event of the firm's insolvency?
4. Are my assets eligible for FSCS protection (if UK-regulated)?
5. How are corporate actions (dividends, rights issues) processed — and who is responsible if they are missed?
6. What is the reconciliation frequency and what happens when discrepancies arise?

These are not esoteric questions — they are the basic due diligence that any substantial investor should apply to their custody arrangements.

How Global Investments can help

Global Investments works with HNW clients on the full structure of their international wealth — including helping them understand the custody and administration layer beneath their investment portfolios. For clients consolidating assets from multiple jurisdictions, establishing a family office banking structure, or reviewing the safety and efficiency of their current arrangements, we can connect you with specialist advisers and private banking relationships with appropriate custody infrastructure.

Contact us to discuss how your assets are held and whether your current custody structure is fit for purpose.