Multi-family office or single family office in Hong Kong: which one, and when

Two versions of the same idea, one built by a family for itself and one shared across several families, and the practical question is which of them a family's circumstances actually justify.

What is a single family office?

A single family office is a private company that one family establishes to run its own affairs, staffed by people the family employs. It exists to hold the whole picture in one place: what the family owns, how it is held, what the family intends to happen to it, and who is doing what about that.

That control is the point, and it is also the cost. An office of this kind is an employer and a tenant, with its own administration, technology, record-keeping and staff turnover. The family is not buying a service; it is starting an organisation.

What is a multi-family office?

A multi-family office is a firm that performs the same coordinating role for several families from one professional platform. It sits on the family's side of the table: it maps what the family owns and what the family wants to happen to it, then coordinates the lawyers, accountants, trustees, bankers and other specialists who put the arrangements in place, and keeps those arrangements current as the family changes.

The distinction that matters is not size but the word coordinator. A bank, a law firm and an accountancy practice each hold a mandate over part of a family's affairs, and the questions that cause trouble usually sit between those mandates: an ownership structure that no longer matches a will, a next generation that has never been told what exists. A multi-family office gives a family a dedicated coordinator for that space without the fixed cost of a full-time team of its own. Prosper Family Office, a Hong Kong firm whose co-founders have backgrounds in banking, insurance, trust, law and family business, is one example of that coordination model.

What does a family need to run a single family office?

People first. Running one properly means someone accountable for the whole picture, someone who can read a trust deed and a shareholders' agreement side by side, someone who keeps the records and the reporting, and access to tax and legal expertise across every jurisdiction the family touches. Those roles do not compress well into one or two hires, and a family office staffed too thinly tends to become a very expensive administrator.

Then the recurring cost. Credible public figures for what a Hong Kong single family office costs to run are thin, and a firm that coordinates a family's affairs should be careful with numbers it cannot source. Described qualitatively: the cost is largely fixed, paid every year whether or not much happens, and driven by salaries rather than by the size of the family's affairs. That is why the model has historically suited the largest fortunes, and why it does not shrink when the family's year is quiet.

Then the less obvious requirement: enough complexity, in entities, jurisdictions, property and family members, to occupy the people it employs. Families sometimes discover they have built a structure that is idle for months at a time.

When is a multi-family office the sensible route?

When the family's affairs are complicated enough to need coordination but not large enough to keep a permanent team usefully busy. That describes most affluent families in Hong Kong: an operating business, property in two or three places, accounts at several banks, a trust set up years ago and never revisited, children studying or working abroad. The coordination problem is real. The staffing problem is not worth taking on.

It is also the sensible route when the requirement is a capability rather than an institution. A family that wants its documents aligned, its decision-making agreed and its successors prepared can obtain all of that through a shared platform, and can end the arrangement in a way that a company with employees cannot.

What changes when a family moves from one to the other?

Moving from a multi-family office to a single family office turns a service relationship into an employment relationship. The family gains control and full-time attention, and takes on recruitment, premises, succession within the office itself and the risk that a key person leaves. The coordination work does not disappear; it moves in-house and needs the same discipline, now with the family as employer.

Moving the other way, which happens more often than it is discussed, usually follows a generational transition, a sale of the operating business, or a recognition that the office costs more than the complexity justifies. What matters in either direction is continuity of the record. If the map of what exists, the reasoning behind each arrangement and the contact for each adviser sit in one person's head, the transition loses them.

How does Hong Kong's environment shape the choice?

Hong Kong now has a deep concentration of family offices and the professional community around them. A market study conducted by Deloitte and commissioned by InvestHK counted more than 3,380 single family offices operating in Hong Kong as at the end of 2025. InvestHK's dedicated FamilyOfficeHK team had assisted 252 family offices to establish or expand in the city between June 2021 and March 2026.

Two consequences follow. Because the specialist professions are well supplied here, a family does not need to employ those specialists in order to reach them, which weakens one of the traditional arguments for building in-house. And because Hong Kong families are frequently spread across jurisdictions, the harder problem is joining up advisers in different places rather than finding them. That is a coordination problem, and coordination can be bought without being built.

Frequently asked questions

What is the difference between a multi-family office and a single family office?

A single family office is a private company one family establishes for its own affairs, with its own staff, offering the most control at the highest fixed cost. A multi-family office serves several families from one professional platform, giving each family a dedicated coordinator without that fixed cost. The work is similar; the ownership and the economics are not.

How much wealth do you need for a single family office?

There is no published threshold that can be sourced reliably, and figures quoted in the press vary widely. The more useful test is not the size of the balance sheet but whether there is enough continuous work, across entities, jurisdictions and family members, to occupy a permanent team, and whether the family is willing to be an employer.

Can a family use a multi-family office and still keep its own bank and lawyer?

Yes, and that is the usual arrangement. The coordinating firm scopes what is needed and works alongside the family's existing professionals, who act for the family directly. Families rarely need to change advisers; they need someone accountable for how those advisers fit together.

Is a multi-family office the same as a private bank?

No. A bank works from its own platform and holds a mandate over the part of a family's affairs that sits with it. A multi-family office represents the family's interests across all of its banks and advisers, which is what allows it to coordinate among them.

Sources

Market Study on the Family Office Landscape in Hong Kong, conducted by Deloitte and commissioned by InvestHK, announced 10 February 2026 (data as at end of 2025); Legislative Council reply LCQ18, HKSAR Government, 22 April 2026.

This page is provided for general information only. It does not constitute legal, tax, accounting or investment advice, and should not be relied upon as such. Families should seek advice from appropriately qualified professionals on their specific circumstances.