Single Family Office (SFO)

A single family office, or SFO, is an organisation dedicated to the wealth and affairs of one family. Its staff, governance, systems, and service model are designed around that family's assets, entities, values, privacy, and decision style. Work can include investments, finance, tax coordination, estate support, philanthropy, governance, and personal administration.

An SFO does not need to perform everything internally. Many maintain a small core team and engage external advisers or an OCIO for specialist work. What distinguishes the model is that the office is accountable to one family rather than serving unrelated clients.

Why it matters for family offices

An SFO offers control over priorities, staffing, data, and service design. It can hold deep knowledge of the family's business, structures, relationships, and history. The family also bears the full cost and responsibility for hiring, controls, technology, cybersecurity, and continuity. Privacy depends on good practice rather than the SFO label alone.

There is no universal asset threshold at which an SFO becomes appropriate. Complexity, service expectations, geographic spread, privacy needs, and willingness to manage an organisation matter alongside wealth. Families compare the full operating cost with multi-family, virtual, and hybrid alternatives before building.

How it shows up in practice

Suppose a family has an operating business, $250 million of investments, eight trusts, and members in three countries. It creates an SFO with a director, investment lead, finance manager, and operations professional. External firms provide tax, legal, security, and specialist investment work.

The office documents authority, uses dual payment controls, consolidates data, and reports to family governance bodies. A secure platform allows the lean team to reconcile accounts and track private assets without building a large back office. Annual review compares services, risks, and costs with the family's objectives. The SFO remains useful because it coordinates complexity, not simply because the family crossed a headline wealth figure.