What Is the Difference Between a Single Family Office and a Multi-Family Office?
Short answer. A single family office is organized to serve one family, while a multi-family office serves multiple families through a shared organization. The choice affects control, staffing, service model, and costs. Compare how much customization and direct oversight your family needs with the resources and shared costs a multi-family office can provide.
A single family office serves one family, while a multi-family office serves multiple families. The distinction affects who the organization serves, how costs are shared, and how much control a family has over its own team and processes.
How a Single Family Office Works
A single family office is built around one family's needs. The family can shape its staff, reporting, investment process, and service relationships to suit its priorities. That direct structure can offer close control, but the family also carries the responsibility for deciding how the office operates and for covering its costs.
The model can be staffed internally, supported by outside providers, or organized in a combination of those ways. A smaller or more flexible setup may outsource functions that do not need a full time employee. The right design depends on the family's needs, not on a label alone.
How a Multi-Family Office Works
A multi-family office provides services to more than one family through a shared business. Families may gain access to a team and services without building every function themselves. Costs and staff capacity are shared across clients, though the precise arrangement varies from one provider to another.
Ask how the provider handles conflicts, how services are assigned, what decisions remain yours, and what fees apply. Find out whether investment management, reporting, administration, and coordination are handled by the same team or by outside partners. The name of the model does not tell you how well the services fit.
Compare Control, Service, and Cost
Consider what your family needs to manage, how much direct involvement you want, and whether you want to employ staff. A single family office may offer greater control but requires the family to oversee an organization. A multi-family office may provide shared resources, but its processes and service scope must meet your family's requirements.
Costs depend on structure. For example, a provider can outsource nonessential staff and compliance functions, while another may employ more people directly. Compare the full service arrangement and ask how fees may change as your needs change. The single versus multi-family office break-even calculator can help frame that comparison.
Choose Based on the Work You Need Done
Start by listing the responsibilities you want covered, the decisions you want to retain, and the degree of coordination your family expects. Then compare providers and internal options against those requirements. Talk with your attorney and CPA about legal or tax specifics related to the structure or services.
For more context, read about the virtual family office model, choosing a multi-family office, when a single family office may make sense, and converting a single family office into a multi-family office.
The difference in costs between running an SFO and an MFO really depends on the structure of the organization.
Sources: The Single Family Office. Informational only, not financial, legal or tax advice.