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Families with significant wealth often reach a point where managing investments is only one part of a much larger challenge. Tax planning, estate matters, operating businesses, reporting, philanthropy, governance and personal financial administration all need to work together.
The question then becomes not simply whether to establish a family office, but what kind of structure can manage that complexity effectively.
A family office centralizes the financial, tax, investment, governance and administrative work surrounding significant family wealth. The right family office structure determines who performs that work, where decisions are made, how information is protected and what infrastructure the family must support. A dedicated office can maximize privacy and control, while shared or outsourced models can reduce fixed costs and broaden access to specialists. Structure also affects internal controls, technology, staffing and the coordination of outside advisors. The SEC’s family office rule, adopted June 22, 2011, recognizes qualifying offices serving family clients under specific ownership and control conditions. In practice, structure matters because complexity grows faster than wealth alone over time.
A Single Family Office (SFO) serves one family through a dedicated organization and team. It is generally best suited to families with substantial wealth, complex entities, operating businesses, investment portfolios or multigenerational planning needs that justify permanent infrastructure. The advantages are direct control, confidentiality, continuity and the ability to design processes entirely around one family. The tradeoffs are significant staffing, technology, compliance and administrative costs, plus the need for strong internal controls and ongoing professional development. Tax and estate planning can also create coordination demands. For 2026, the federal estate and gift tax basic exclusion amount, often called the Lifetime Exemption, is $15 million per individual, making integrated planning especially important.
A Multi Family Office (MFO) serves several families through a shared professional platform rather than maintaining a separate organization for each household. Compared with an SFO, the model spreads the cost of technology, reporting, compliance, investment support and specialized talent across multiple clients. That can provide depth, stronger segregation of duties and broader intellectual capital without requiring each family to recruit and retain a full internal team. The tradeoff is reduced exclusivity. Families may have less control over systems, staffing and workflows, and they share professional attention with other clients. For families that want institutional capabilities but do not need every function dedicated solely to them, the MFO can provide balance.
A hybrid family office combines selected in-house capabilities with carefully outsourced expertise. The family may retain employees for governance, accounting, reporting or day-to-day coordination while using outside specialists for tax, investment management, cybersecurity, technology, estate planning or other family office services. This approach can preserve direct control where personal interaction matters most while avoiding the cost and staffing burden of building every capability internally. It can also reduce risks tied to employee turnover, thin staffing and limited specialization. The model works best when responsibilities are clearly defined. This structure can also support Estate, Gift and Trust Tax Valuations by giving families access to specialized valuation expertise without requiring those capabilities to be maintained entirely in-house.
Choosing among single-family, multi-family and hybrid models starts with the family’s actual complexity, not a wealth threshold alone. Consider the number of entities, investments, trusts, operating businesses, family members and jurisdictions involved, then identify which responsibilities require daily internal control. Next, compare the cost of hiring and retaining a dedicated team with the cost and flexibility of shared or outsourced resources. Privacy expectations, reporting needs, technology, internal controls and succession planning should also influence the decision. Families should map every advisor and responsibility before selecting a model, because gaps often appear between providers rather than within them. The best fit is the structure that coordinates expertise without creating unnecessary infrastructure.
For more than four decades, Bennett Thrasher has provided businesses and individuals with strategic business guidance and solutions through professional tax, audit, advisory, and business process outsourcing services. Contact Lorrie Allegra, Partner and Head of BT Family Office, or call us at 770.396.2200.
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