Family Office

The decision under the decision

Building a single-family office (SFO) is framed in the industry as a function of scale. Consultants offer breakpoint analyses: at $50M you should consider, at $100M you must, at $250M you clearly need one. These frameworks are not wrong on the economics, but they miss the primary variable. The question is not whether a family can afford to run an office. Most can at the relevant wealth levels. The question is whether the principal wants to employ people, run a P&L, and be responsible for a small institution for the rest of their life.

The honest version of the SFO decision is a lifestyle question with financial implications, dressed up as a financial question with lifestyle implications. Families who recognize that tend to make a better choice in either direction. Families who don’t routinely build offices that become quiet burdens, or delay building offices until the complexity has already outgrown the alternatives.

The continuum of options

Five meaningfully different arrangements, from least to most institutional.

Embedded family office. A longtime advisor, an executive assistant, and a tax professional function as an informal office without formal structure. Common between $20M and $100M. Works well for households without operating businesses, international complexity, or multiple generations of adult beneficiaries.

Virtual family office (VFO). A handful of trusted professionals (investment, tax, estate, insurance) coordinated by a single generalist, sometimes the principal and sometimes an advisor in a “personal CFO” role. Lower ongoing cost than an SFO, and real coordination if the generalist is competent. Often the right answer at $30M to $150M.

Multi-family office (MFO). Institutional infrastructure (CIO, reporting, tax coordination, trust services) shared across a handful of families. The MFO provides professional depth without requiring the family to employ it directly. Pricing runs roughly 25 to 75 basis points of assets at the smaller end, lower at the high end. Generally efficient from $50M up to the point where the family’s needs exceed what shared infrastructure can deliver, usually somewhere above $300M.

Outsourced CIO (OCIO) plus light family office. A variant of the MFO model where investment management is fully outsourced to an institutional provider while tax, trust, and personal services are handled in-house or through an MFO. Common for families with strong investment views but limited appetite for in-house investment staff.

Single-family office (SFO). Full internal team: CIO, controller, estate and tax coordination, sometimes governance and family support functions. Appropriate when the family’s complexity (operating businesses, international presence, multi-generational structures, deal sourcing) exceeds what MFO infrastructure can serve. Typically sensible at $300M or above, though smaller SFOs exist and larger families still use MFOs.

Hybrid SFO. A single-family office for governance and family-specific functions, with investment management outsourced to an OCIO or specific sub-managers. Increasingly common. Solves the core staffing difficulty (hiring and retaining investment talent) without sacrificing the SFO benefits.

What actually sits inside a well-run family office

The consultant language obscures it. The real functions are these.

Cash management and accounting. Multiple accounts, multiple currencies, multiple entities. Bill pay, payroll for household staff, K-1 handling, consolidated reporting. Often more operational than the family expects.

Investment coordination. Whether in-house or outsourced, someone owns the investment policy, oversees managers, handles capital calls, and produces the quarterly conversation. The quality of this function is the most-cited source of satisfaction or frustration with SFOs.

Tax coordination. Preparation is typically outsourced. Strategy is where the family office earns its fees. Aligning entities, trusts, and business interests across jurisdictions. Timing realizations. Elections. Charitable vehicle funding. Residency questions.

Trust and estate administration. Funding trusts, distributing per document terms, coordinating trustees, handling the quiet ongoing work of multi-decade structures. Rarely glamorous. Always consequential.

Governance support. Family meetings, next-generation education, conflict resolution, the design of decision-making processes. The best family offices lean into this. The weakest try to stay out of it and create vacuums.

Concierge and lifestyle functions. Travel coordination, household staff oversight, property management, bespoke purchases. Some families want this embedded in the office. Others explicitly keep it separate to avoid blurring roles.

Security and privacy. Physical and digital protection, press management, reputation monitoring. Mostly outsourced to specialists, coordinated from the office.

The economics

SFO cost typically runs between 25 and 100 basis points of AUM, sometimes more. Higher at smaller scales, lower at larger. A $500M SFO at 50 basis points is $2.5M per year in operating cost. A $2B SFO at 35 basis points is $7M. Neither number is trivial, and the functions a good SFO performs have to be worth significantly more than the cost to justify the arrangement.

The MFO economics are cleaner in comparison. A family paying 50 basis points to an MFO for $100M in assets is paying $500k per year, and in exchange gets institutional-quality investment management, tax coordination, reporting, and trust services. Matching that in-house is difficult below $500M.

The hidden costs of SFOs are rarely in the operating budget. They are in the principal’s time and attention. Employing people is its own ongoing obligation. Hiring, firing, managing compensation, handling interpersonal issues. The principals who thrive at this often ran operating businesses. The ones who rebuilt their life specifically to escape running operating businesses often find the SFO is not what they wanted.

Common failure modes

Building too early. A family at $50M hiring a CIO and a controller, paying $1M or more in operating cost to run a portfolio that would have been competently managed at an MFO for a quarter of that. Usually driven by the principal’s desire for control. Often reversed within five years.

Hiring peers instead of professionals. A college roommate as CIO. A longtime employee from the operating business as CFO. Works in good times. Breaks down when the family needs real pushback on a decision and the hired peer is unable or unwilling to provide it.

Designing around the current generation. An SFO built for a founder principal often does not work when the founder dies or withdraws and the next generation inherits it with different preferences, different appetites for involvement, and different needs from the office. Succession planning for the office is more important than succession planning for the assets.

Underpricing governance. Families that focus their office on investment management and compliance while leaving family governance informal routinely discover the latter was the actual binding constraint. The best SFOs invest in governance infrastructure (family meetings, education, conflict resolution protocols) from the start.

Overpricing alternatives access. The marketing case for SFOs often centers on direct deal access. You will see things others will not. True at scale for the largest SFOs. Usually overstated at $100M to $500M, where the deal flow from an MFO or a sophisticated OCIO is often comparable.

Staff turnover. Losing a CIO or a senior administrator is disruptive in any organization, and particularly so in an SFO because institutional memory is concentrated in a small number of people. Compensation, tenure, and succession planning for key roles are material.

Insufficient separation. Family members who rotate through the office. Family business employees who drift into office roles. Spousal-partner staff handling both personal and office functions. Blurred lines create conflicts of interest that erode trust over time.

Advanced patterns

Private trust companies. For families large enough to support the structure, a private trust company provides continuity, confidentiality, and control over trustee succession that exceeds any commercial trustee. The complexity is real. The benefit at the right scale is transformative.

Operating business as family office. Some families preserve an operating holding company as a semi-family-office, with the finance and legal teams serving the family alongside the business. Works cleanly when it is deliberate. Fails when it evolves by accident and the business pays for the family’s personal work.

Shared family office. A few ultra-large families formally combine family office infrastructure in a joint venture. Rare, complex, and sometimes highly efficient.

Family office as venture and investment platform. Direct-deal SFOs with internal investment teams sourcing, structuring, and managing direct private investments. Demands institutional quality or becomes expensive theater. Families who do this well tend to have operating backgrounds and genuine edge.

Multi-generational education programs. Formal programs for heirs covering financial literacy, fiduciary responsibility, governance, and philanthropy. The best SFOs at multi-generational scale invest heavily here. The payoff appears over decades rather than quarters.

Where to go deeper

The family office decision is where peer input most reliably outperforms consulting input. Peer groups (TIGER 21, Long Angle, and the specific family-office communities around major hubs) routinely surface the candid version of the tradeoffs. Who built an SFO and regretted it. Which MFO actually delivered. How a given family redesigned the office five years in. The consultant version of the conversation has its place. The peer version usually shapes the decision. For locale-specific mechanics (Swiss family office structures, Singapore 13O and 13U regimes, Hong Kong’s unified family office regime, UAE foundation structures), see the hub-specific versions of this topic.