What Is a Family Office and Do You Need One?

The term "family office" is used frequently in private wealth circles, yet it covers a wide spectrum of structures — from a single employee coordinating a billionaire's financial affairs to a professionally staffed organisation serving dozens of wealthy families. Understanding what a family office actually does, what it costs, and at what level of wealth it makes economic sense is essential for any internationally mobile high-net-worth (HNW) individual or family considering this route.

What a Family Office Does

At its core, a family office is a private organisation that manages the financial and personal affairs of one or more wealthy families. Services typically span:

Investment management — constructing and overseeing a diversified portfolio across asset classes, including listed equities, fixed income, alternative investments, real estate, private equity, and hedge funds. Family offices can negotiate institutional terms on fees and access strategies unavailable to retail or even high-net-worth private banking clients.

Tax planning and compliance — coordinating advice across jurisdictions, managing domicile and residence issues, ensuring efficient use of reliefs, and overseeing compliance obligations in multiple countries. For internationally mobile families, this is often the single most valuable function.

Estate and succession planning — structuring wills, trusts, and family governance arrangements to transfer wealth across generations with minimum friction and tax leakage.

Accounting and reporting — consolidated reporting across all assets, entities, and currencies, providing the family with a clear picture of total wealth in real time.

Legal coordination — engaging specialist lawyers, managing litigation, overseeing contracts, and maintaining corporate structures.

Philanthropy — administering charitable foundations, donor-advised funds, and impact investing programmes.

Lifestyle services — in some cases, family offices coordinate concierge functions: property management, travel, security, school placements, and staff payroll.

Single-Family Office vs Multi-Family Office

The two principal models differ fundamentally in cost, control, and scale.

Single-family office (SFO) serves one family exclusively. All staff, systems, and resources are dedicated to that family. The SFO provides maximum privacy, bespoke service, and the ability to hire specialists in exactly the disciplines the family requires. The trade-off is cost: a properly resourced SFO with a chief investment officer, tax director, legal counsel, and administrative team typically costs between £1 million and £5 million per year to run, before external manager fees and professional advisers.

This means a single-family office is generally only cost-effective at wealth levels of £100 million or above — though the precise threshold depends on portfolio complexity, geographic spread, and the family's appetite for control versus convenience.

Multi-family office (MFO) pools resources across multiple families, sharing fixed costs. Each client family retains a degree of bespoke service — more than private banking, less than a dedicated SFO. Annual fees are typically structured as a percentage of assets under administration, often in the range of 0.5% to 1.5% depending on services included, or a flat retainer plus performance or management fees.

Multi-family offices have proliferated in wealth centres such as London, Zurich, Dubai, Singapore, and the Channel Islands. Entry points vary but many reputable MFOs begin accepting clients at £10 million to £25 million of investable assets. Some operate with a minimum of £5 million if the family's affairs are relatively straightforward.

Embedded vs Independent Structures

Some SFOs are embedded within a family's operating business — particularly in entrepreneurial families where the business generates the wealth and the office manages the proceeds. This arrangement is administratively efficient but creates governance risks: key decisions may be influenced by the operating company's dynamics rather than the family's long-term interests.

Independent SFOs — established as separate legal entities, often offshore — are cleaner from a governance and tax perspective but require a critical mass of assets and complexity to justify the administrative overhead.

When Does a Family Office Make Sense?

For most HNW individuals with investable assets below £10 million, the economics do not support a family office structure, even at the MFO level. A well-chosen independent financial adviser, supplemented by specialist tax counsel and estate planning lawyers as needed, delivers comparable outcomes at a fraction of the cost.

The calculus begins to shift in the £10 million to £50 million range, particularly where:

• The family spans multiple countries with different tax obligations
• There is a significant operating business alongside personal assets
• The family includes multiple generations with divergent interests
• The investment portfolio is complex, including private equity, hedge funds, or direct property holdings
• Succession planning involves multiple jurisdictions and family branches

Above £50 million, the breadth of issues — multi-jurisdictional tax, access to institutional-quality investments, succession complexity, philanthropy, and family governance — typically justifies the cost of an MFO or a lightly staffed SFO.

The Role of the Chief Investment Officer

A quality family office is distinguished above all else by its investment governance. A capable chief investment officer (CIO) does not simply allocate to external fund managers — they construct an asset allocation framework that reflects the family's unique risk tolerance, liquidity needs, tax profile, and generational timeline, then rigorously select and monitor external managers against benchmarks.

CIO compensation at a well-resourced SFO can reach seven figures in total remuneration, which illustrates why asset scale is a prerequisite. At an MFO, the CIO function is shared across client families, making it more accessible.

Technology and Reporting

Modern family offices rely on aggregation platforms — software that consolidates data across banks, custodians, funds, and direct investments into a single reporting framework. Leading platforms as of 2026 include Addepar, Landytech, and Masttro. These systems allow the family or its advisers to view consolidated net worth, attribution of returns, and currency exposure in real time, across all entities.

Family Governance and the Family Office

Beyond investment and tax, the most enduring family offices build governance structures that prepare the next generation to be stewards rather than merely beneficiaries of wealth. This includes family councils, investment committees, philanthropy committees, and education programmes designed to instil financial literacy and shared values. Research consistently shows that family wealth erodes across generations primarily due to failures in governance and communication rather than investment underperformance.

Costs and Fee Transparency

Family office costs are often opaque. At an MFO, families should request a full fee schedule covering:

• Base administration or retainer fee
• Investment management fee (if the MFO manages assets directly)
• Transaction charges
• Fees for specific services (tax returns, trust management, legal work)
• Any performance fees

Total all-in costs of 1% to 2% of assets per year are common at the MFO level for a comprehensive service. Families should compare this against the costs of replicating the same service through separate providers: private bank, independent adviser, tax accountant, and solicitor.

Regulatory Considerations

Family offices are subject to varying levels of regulation depending on jurisdiction. In the UK, an SFO managing solely the assets of a single family is generally exempt from FCA authorisation under the Markets in Financial Instruments Directive (MiFID II) exemption, though advice to family members may trigger licensing requirements. In the EU, regulations vary by member state. In the US, the Dodd-Frank Act's family office exemption applies to entities meeting specific criteria.

Multi-family offices, because they serve multiple clients, are typically regulated as investment advisers or portfolio managers in their domicile jurisdiction. Due diligence on the regulatory status of any MFO is essential before engaging their services.

Alternatives to a Family Office

For families whose wealth does not yet justify a full family office, several alternatives offer meaningful coordination benefits:

Virtual family office (VFO) — a lead adviser (typically an independent financial planner or private bank relationship manager) coordinates a panel of specialists — tax, legal, estate, investments — without employing them on a permanent basis. Cost-effective for the £5 million to £30 million range.

Outsourced CIO (OCIO) — institutional investment management provided on an outsourced basis, giving access to sophisticated asset allocation and manager selection without the fixed costs of an in-house CIO.

Private banking with family office services — the major private banks (Coutts, Barclays Private, UBS, Julius Baer, Pictet) offer family office-style services within their client proposition, though these are necessarily less bespoke than a dedicated office and may carry product distribution conflicts of interest.

How Global Investments Can Help

Global Investments has advised internationally mobile families on wealth structuring, cross-border tax planning, and investment governance for over 32 years. Whether you are at the stage of evaluating whether a family office is appropriate for your circumstances, seeking a multi-family office to coordinate your affairs across jurisdictions, or building internal governance structures for a family with complex succession needs, our advisers can provide an objective assessment and help you navigate the options available.

We work with families across major markets worldwide and have deep familiarity with the tax and regulatory frameworks that shape family office decisions in the international jurisdictions where our clients live and invest. Contact Global Investments to arrange a confidential discussion.

This article is for information purposes only and does not constitute financial, legal, or tax advice. Family office structures and their tax treatment vary by jurisdiction and individual circumstance. Professional advice should be sought before making any structural decisions. The value of investments can fall as well as rise, and past performance is not a guide to future returns.