When a Single Family Office Is Actually the Right Answer

Overview

**A single-family office is the right answer when a family genuinely needs sustained, dedicated internal capability and wants to operate an institution of its own. Wealth can support that decision, but the better signal is the work: how much is recurring, how specialised it is, how much must be internal, and whether the family wants to own the employment and infrastructure that follow.

Circle 26 exists because most families are pushed toward a staffed office they don't need. But some families genuinely do need one, and it is worth being honest about when.

When is a single family office the right choice?

A single-family office is the right choice when the wealth can carry the fixed cost and the family wants full control of a dedicated team. Published benchmarks often discuss asset levels because fixed office costs become easier to absorb as wealth grows. Treat those numbers as economic reference points, not as a definition of when an SFO is operationally required. Above that, a staffed office's cost ratio becomes reasonable and its advantages become real.

It is not only about assets. A family running an operating-business-like structure, direct investments, an active deal pipeline, multiple operating entities, significant philanthropy, may justify dedicated staff on complexity alone. The signal is a genuine need for full-time, in-house capability, not occasional expertise.

Most benchmarks place the single-family-office threshold at $250–500 million in investable assets.

What does a single family office give you that leaner models don't?

A single-family office gives you dedicated, exclusive, fully customisable capability. The team works only for your family, can be shaped precisely to your needs, and offers a level of control and privacy that shared or fractional models cannot match. For a family that wants its own institution, that is the point.

For direct investing especially, an in-house team with deep knowledge of the family's strategy can act faster and with more conviction than outsourced arrangements. Where that capability is used constantly, paying for it full-time is rational. The exclusivity is a real benefit, not just an expense.

What is the minimum wealth to justify one?

The minimum is commonly cited at $100 million to consider one and $250–500 million to run one cost-effectively, with setup costs of $500,000–$1.5 million on top. Below roughly $100 million, a staffed office's fixed cost typically consumes an unreasonable share of returns: a 3%+ cost ratio is not unusual at $100 million against a ~$3 million office.

These are benchmarks, not rules. A family with unusual complexity might justify one lower; a family with simple holdings might not justify one much higher. The number is a starting point for an honest conversation, not a threshold that decides on its own.

What are the honest downsides?

The honest downsides of a single-family office are cost, key person risk, and scope creep. It is the most expensive model, it concentrates knowledge in a small team whose departure can hollow the office out, and its remit tends to expand, into philanthropy, lifestyle, next-gen programs, pulling costs up over time. Citi and others note that larger offices experience exactly this scope creep.

Key person risk is the one families underestimate most. A staffed office can be as dependent on its CIO or COO as a family office of one is on its founder. Size does not remove single-point-of-failure risk; it can disguise it.

Who should not build a single family office?

Families below the threshold, or those whose need is coordination rather than dedicated in-house investing, should generally not build a single-family office. For them, the staffed model means paying institutional overhead for capability they use only part-time. A Lean Family Office or a multi-family office usually delivers the same coordination for a fraction of the cost, with less key person risk.

Frequently asked questions