Single family office
A dedicated institution built for one family. Full-time staff, complete control, institutional cost.
What is a Lean Family Office
The comparison
Lean, virtual, single or multi-family office — which one fits?
Four models for running complex family wealth. Each one genuinely wins at something, and the honest comparison is not about cost — it is about who ends up owning the system.
In one line each
The four models
Multi-family office
A firm serving several families. Institutional-grade investment management and a broad service menu, usually asset-based.
Virtual family office
A provider acting as the family's office remotely. Fast to stand up; the machine belongs to the provider.
Lean family office
Coordination inside the family, a documented system, fractional specialists — and every artefact owned outright.
Side by side
The comparison
| Criterion | Single FO | Multi-FO | Virtual FO | Lean FO |
|---|---|---|---|---|
| Annual cost | ~$3M+ | Fee or % of assets | Retainer | Low five figures + own resource |
| Dedicated to one family | ✓Strong | ✕Weak or absent | ◑Partial | ✓Strong |
| Independent of products | ✓Strong | ◑Partial | ◑Partial | ✓Strong |
| Coordination mandate | ✓Strong | ◑Partial | ✓Strong | ✓Strong |
| Governance architecture | ✓Strong | ◑Partial | ◑Partial | ✓Strong |
| Cross-advisor oversight | ✓Strong | ◑Partial | ✓Strong | ✓Strong |
| Single source of truth | ✓Strong | ◑Partial | ◑Partial | ✓Strong |
| Family owns the system | ◑Partial | ✕Weak or absent | ✕Weak or absent | ✓Strong |
| Survives changing provider | n/a | ✕Weak or absent | ✕Weak or absent | ✓Strong |
| In-house team required | ✓Strong | ✕Weak or absent | ✕Weak or absent | ◑Partial |
| Institutional memory stays with family | ✓Strong | ✕Weak or absent | ✕Weak or absent | ✓Strong |
✓ Strong ◑ Partial ✕ Weak or absent Scroll sideways on a narrow screen.
Honestly
Where each model genuinely wins
01
The single family office wins on control
If the wealth is large enough, the complexity institutional, and the family wants complete control over people, systems and priorities, nothing beats a dedicated office. Full-time staff who work only for you, and answer only to you.
The trade: Roughly $3 million a year, mostly personnel, plus premises and employment risk. Years to stand up properly. And a payroll the family now owns — with everything that implies when priorities change.
Right when: The scale justifies the overhead, and the family wants an institution rather than a system.
02
The multi-family office wins on breadth of service
An MFO gives access to institutional-grade investment management, reporting and a broad service menu without building any of it. For families whose primary need is investment management with some coordination attached, it works well.
The trade: The firm's economics are usually asset-based, so coordination sits alongside a commercial relationship rather than independent of it. And the systems, the reporting and the institutional memory belong to the firm. Move, and much of it is rebuilt from scratch.
Right when: Investment management is the core need and coordination is secondary.
03
The virtual family office wins on speed
A VFO gives a family a functioning office quickly, without hiring anyone. The provider does the coordination, and for a family that wants the outcome without the build, that is genuinely valuable.
The trade: The coordination capability, the systems and the accumulated knowledge live with the provider. The family gets the output but not the machine — and dependency deepens over time rather than reducing.
Right when: The family wants the function handled and is comfortable that it is rented rather than owned.
04
The Lean Family Office wins on ownership
The LFO puts the coordination inside the family — one capable person, a documented system, fractional specialists around them — and every artefact belongs to the family: the record, the governance, the tools.
The trade: It requires someone in the seat and a real commitment to building the system. It is not a service that arrives fully formed. It is an office you build, and building it takes effort in year one.
Right when: The family has complexity but not institutional scale, wants independence from any single provider, and is willing to own the thing rather than rent it.
The honest test
Who owns the system?
Cost usually dominates this comparison. It is the wrong lead question. Ask instead: if this relationship ended next Tuesday, what would we still have?
With an MFO or a VFO, the honest answer is usually the assets and the documents — but not the system, the reporting architecture, or the institutional memory. Those belong to the firm, and rebuilding them takes months.
With an SFO, the family owns everything but also owns the payroll, the premises and the employment obligations.
With a Lean Family Office, the family owns the record, the governance and the tools outright — and they keep working regardless of who is or is not involved.
That is the single line where the models genuinely differ, and it is the one most families never ask about until they are leaving.
The other side
When the lean model is the wrong answer
We would rather say this than have you discover it later.
When there is nobody to be in the seat
The lean model needs a coordination function. If no one will hold it — not the principal, not a hire, not an existing team member — a VFO or an MFO is the better answer.
When complexity genuinely is institutional
Multiple operating businesses, a large direct investment programme, a family council spanning branches — at some point a dedicated team is the right answer, and pretending otherwise costs more than it saves.
When the family wants it handled, not owned
Some principals genuinely do not want a system of their own. That is a legitimate preference, and the lean model will feel like homework.
When there is no complexity to coordinate
One jurisdiction, one entity, a straightforward portfolio — a good advisor is enough. Building an office would be overhead without benefit.
Questions
Questions
Can a family use more than one model?
Frequently. A family might keep an MFO for investment management while running a lean office for coordination and governance — which usually improves the MFO relationship, because someone on the family's side can finally see the whole picture.
Is a Lean Family Office just a small single family office?
No. An SFO is an institution with staff; a Lean Family Office is an architecture. The difference is that a lean office is designed to run on documentation rather than headcount, so it scales down without breaking.
What does each model actually cost?
An SFO runs to seven figures annually, most of it personnel. MFOs are typically asset-based. VFOs are usually retained. A Lean Family Office costs the family's own coordination resource plus whatever tooling and support they choose — an order of magnitude below a staffed office.
How do we decide?
Start by assessing what your office actually needs. Complexity, existing resources, and how much of it is already documented usually make the answer obvious — and it is worth knowing before anyone sells you a model.
Start by assessing what you actually need.
Complexity, existing resources, and how much is already documented usually make the answer obvious — and it is worth knowing before anyone sells you a model.