Banking for Family Offices: Structure, Treasury and Relationships

A family office — whether a single-family office (SFO) managing one family's wealth or a multi-family office (MFO) serving several — operates more like a small financial institution than a personal banking client. Its banking requirements span operational cash management, investment custody, FX exposure, credit facilities, and reporting across multiple entities, currencies, and jurisdictions. The private banking model designed for an affluent individual is, at this scale, structurally inadequate.

This guide addresses the banking architecture appropriate for a family office with assets above approximately £20–30 million — the level at which institutional banking disciplines become genuinely necessary.

Multi-bank structure: why one bank is not enough

Concentration risk is a fundamental principle in investment management; it applies equally to banking relationships. Holding all assets at a single bank exposes the family to:

• Counterparty risk: even systemically important banks can face operational disruptions, sanctions, or (rarely) insolvency. Assets above FSCS limits (£120,000 per eligible person per institution for UK-regulated deposits, raised from £85,000 on 1 December 2025) are not guaranteed.
• Negotiating weakness: a client's leverage with any single bank is stronger when there is a credible alternative.
• Service limitations: no single bank is best-in-class across all services — custody, foreign exchange, credit, trade finance, and digital infrastructure each have specialist providers.

A well-structured family office typically maintains relationships with:

1. Primary private bank: relationship management, investment advisory, Lombard lending, and wealth planning. Typically a Swiss, UK, or Channel Islands private bank.
2. Operational bank: current account for payroll, supplier payments, and day-to-day cash management. Often a major clearing bank (Barclays, HSBC, NatWest) or a specialist family office bank.
3. Custodian: separate custody of investment assets, providing independent oversight of the portfolio values reported by the investment manager.
4. Specialist FX provider: competitive FX execution through a specialist broker or bank treasury desk rather than accepting the private bank's spread.
5. Offshore bank: for structures with assets in Jersey, Guernsey, Cayman, or similar jurisdictions.

The number of relationships should match the complexity of the family's financial structure, not exceed it. Two to four primary banking relationships is a common balance for a family office in the £20–100 million range.

Treasury management

Treasury management is the discipline of managing the family office's cash, short-term investments, and liquidity to ensure obligations can be met without holding unnecessary idle cash.

Cash pooling: for families with multiple entities (trading companies, investment holding vehicles, trusts, SPVs), physical or notional cash pooling can centralise liquidity management. A notional pool aggregates balances across accounts for interest calculation without physically moving funds; a zero-balancing pool sweeps funds to a central account daily. (See the separate guide on cash pooling structures for detailed mechanics.)

Liquidity tiering: a standard approach divides cash into:

• Tier 1 (immediate access): three to six months of operating costs in instant-access accounts or overnight deposits.
• Tier 2 (short-term investment): one to two years' worth held in short-duration bonds, money market funds, or term deposits.
• Tier 3 (long-term investment): the investment portfolio, managed to the family's long-term objectives.

This tiering prevents forced liquidation of long-term assets to meet short-term needs.

Counterparty monitoring: in a multi-bank structure, monitoring each bank's credit rating and financial health is part of treasury discipline. Rating downgrades, regulatory sanctions, or capital adequacy concerns at any banking counterparty should trigger a review.

FX hedging policy

Families with assets, liabilities, and beneficiaries across multiple currencies face ongoing FX exposure. A written FX hedging policy — reviewed annually by the family's investment committee or adviser — addresses:

Policy scope: which currency exposures are material enough to hedge (typically above 2–5 per cent of net assets).

Hedging instruments: which instruments are authorised — spot transactions, forward contracts, vanilla options, participating forwards. Most family offices restrict themselves to straightforward instruments; exotic derivatives are generally inappropriate.

Hedge ratio: what proportion of a given exposure to hedge. Full hedging eliminates currency risk but also eliminates upside. A 50–75 per cent hedge on structural exposures is common.

Review frequency: FX hedges (typically forwards) require rollover as they mature. A rolling 12-month hedging programme with quarterly review is a workable structure for most family offices.

Documentation: all FX transactions should be executed under an ISDA Master Agreement with each counterparty, providing legal netting and close-out certainty in the event of counterparty default.

Investment account segregation

In a well-structured family office, investment accounts are segregated by:

Legal entity: each trust, company, or personal holding should have its own account(s). Commingling assets between entities creates legal, tax, and beneficiary attribution complications.

Investment mandate: discretionary managed portfolios, advisory accounts, and directly held assets each warrant separate accounts, both for performance measurement and for regulatory reporting.

Beneficiary allocation: where assets are earmarked for specific beneficiaries (children's education funds, generation-skipping trusts), maintaining clear account separation makes administration and distribution more straightforward.

Segregation requires more administrative overhead but provides clarity — particularly in the event of a dispute, divorce, or beneficiary challenge to the family's affairs.

Reporting aggregation

A family office with multiple banks, fund managers, direct investments, and property holdings across jurisdictions faces a significant reporting challenge. The solution is a consolidated reporting system — software that aggregates data from all accounts and providers into a single view.

Established consolidation platforms used by family offices include:

• Addepar: institutional-grade aggregation, widely used by large family offices and MFOs.
• Masttro (formerly Objectway): European focus, strong multi-entity and multi-currency reporting.
• Landytech: growing UK and European family office platform.
• Wealth Dynamix: CRM and reporting combined, used by private banks and family offices.

Key capabilities to require from any platform:

• Multi-currency NAV consolidation with benchmark comparison
• Asset class breakdown across all accounts and managers
• Individual manager performance attribution
• Document storage (bank statements, legal documents, valuations)
• Tax reporting data export

Data quality is the critical challenge. Many platforms require manual data upload for illiquid assets, private equity, property, and non-standard holdings. A family office administrator or CFO typically spends a meaningful proportion of their time maintaining the data integrity of the reporting system.

Operational due diligence for family offices

Before selecting a banking or custody provider, a family office should conduct operational due diligence (ODD) — a structured review of the provider's operational processes, financial health, and compliance posture.

Key ODD questions:

• What is the provider's regulatory status and supervisory body?
• What client asset protection regime applies to assets held there?
• What is the reconciliation frequency between the bank's internal records and third-party custodians?
• What business continuity arrangements are in place (data recovery, key person dependency)?
• What is the bank's AML/KYC process and how does it affect account management?
• What are the trigger conditions for account closure or restrictions?

The last point is particularly important in the current regulatory environment. Banks are under sustained pressure from regulators to exit relationships with higher-complexity clients, and family offices with multi-jurisdictional structures, offshore entities, or politically exposed persons (PEPs) in the family may find that account relationships are more fragile than expected.

Private banking relationships vs institutional relationships

Private banking is designed for individuals; institutional banking is designed for entities. A family office often sits uncomfortably between the two.

Private banking advantages: strong relationship management, flexibility, Lombard lending, bespoke structuring. Disadvantage: pricing transparency is often poor; costs are bundled; the RM changes and the relationship needs rebuilding.

Institutional banking advantages: transparent, competitive pricing on FX and custody; standardised service levels; dedicated relationship infrastructure. Disadvantage: less flexibility for bespoke needs; minimum asset thresholds are higher.

For a family office above £50 million, institutional terms (at custodians such as BNY Mellon, Northern Trust, or State Street) are often more economical and technically superior to private banking bundled services, particularly for straightforward custody and FX functions. The private bank relationship remains valuable for lending, tax planning introductions, and relationship banking for individual family members.

How Global Investments can help

Global Investments supports multi-jurisdictional families and family offices with international property investment, asset structuring, and banking relationships. We work with clients to evaluate the banking and custody architecture appropriate for their specific structure, introduce them to private banks and institutional custodians suited to their profile, and provide context on the practical considerations that come with managing wealth across multiple jurisdictions.

Contact us to discuss how your family office's banking structure can be made more efficient, resilient, and cost-effective.