Niche entity . Family office structure

Family offices structured for governance, multi-entity holdings, and generational continuity.

A family office is the entity stack that lets a family manage investments, businesses, real estate, philanthropy, and trusts as one coordinated structure. File.Business handles the holding LLC, the management company, the trust documents, and the multi-state compliance.

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$5M+
Typical AUM threshold
5-15
Entities typical
DE / WY
Most parents domicile
SLAT / GRAT
Trust integration

What a family office actually is

A family office is the structural shell around a wealthy family's holdings. It typically consists of a parent holding entity (LLC or LP), one or more management entities (the actual "office" that employs investment, tax, and legal staff), and a portfolio of subsidiary entities that hold each asset class: operating businesses, public investments, private equity stakes, real estate, art, and philanthropy.

The structure separates ownership from operations, isolates liabilities, simplifies tax planning, and provides governance for multi-generational continuity. Most family offices form when AUM crosses $5M and the family is ready to professionalize administration of its wealth.

Single-family vs multi-family office

SFO . Single-family office

One family, dedicated staff + structure.

Built around one family's wealth. Hires its own CIO, GC, accountants, and asset managers. Typical at $100M+ AUM. Fully customized governance.

  • Full discretion over investments
  • Dedicated tax and legal team
  • Complete privacy
  • Higher operating cost
MFO . Multi-family office

Shared infrastructure across families.

Outsourced family office serving multiple unrelated families. Shared CIO, shared tax + legal team. Typical entry: $5M-$50M AUM. Subscription model.

  • Lower cost than SFO
  • Standardized investment menu
  • Less customization
  • Family must trust the provider

The family office entity stack

A typical family office runs 5-15 entities. The standard stack:

Layer Entity type Purpose
TopHoldings LLC or LPParent entity owning all sub-entities
OperatingManagement LLCEmploys staff, provides services to other family entities
InvestmentsSPV LLCs per dealOne entity per private investment for isolation
Real estateLLC per propertyLiability isolation per asset
Operating businessesLLC or C-CorpActive businesses kept in own entities
TrustsSLAT, GRAT, IDGTEstate planning + generational transfer
PhilanthropyPrivate foundation or DAFTax-deductible giving + family legacy

Governance: how decisions get made

Family office governance is documented, not informal. Standard structure:

  • Family Constitution. The plain-English mission statement. Who is family. What the office is for. Generational continuity rules.
  • Family Council. Decision-making body. Often one vote per branch of the family, with supermajority on major decisions.
  • Investment Committee. Reviews and approves significant investments above thresholds set by Council.
  • Trustee oversight. Independent trustees on key trusts add governance discipline and reduce family disputes.
  • Annual family meeting. Formal review of performance, structure, and next-year priorities.

How File.Business builds family offices

  1. 1. Discovery. Sessions with the family, the CFO or tax advisor, and the estate attorney to map asset classes, family branches, generational goals, and existing entities.
  2. 2. Structure design. Recommended entity stack. Parent jurisdiction (typically Delaware for legal precedent or Wyoming for asset protection). Trust strategy.
  3. 3. Formation. All entities filed in the right order. EINs obtained. Bank accounts opened. Operating Agreements drafted for each.
  4. 4. Family Constitution + Council bylaws. Documented governance.
  5. 5. Ongoing compliance. All 5-15 entities tracked in one Vault. Annual reports, franchise tax, BOI, beneficial ownership monitoring for every entity.

Family office FAQ

What is a family office?

A family office is a structure for managing a wealthy family's investments, entities, and affairs in a coordinated way, often through one or more entities that hold and administer the family's assets. It suits significant, multi-generational wealth. We form and organize the entities a family office uses and keep them compliant.

Who needs a family office?

Families with substantial wealth and multiple investments, entities, or properties that benefit from coordinated management, so it fits high-net-worth situations rather than typical individuals. We flag whether your situation warrants this level of structure so you build it where it genuinely adds value.

How is a family office structured?

Often through one or more LLCs or other entities that hold investments and coordinate the family's affairs, sometimes layered with trusts, so the structure is built from multiple coordinated entities. We form and organize the entities so the family office rests on a clean foundation.

What does a family office do?

It coordinates investment management, entity administration, tax and estate planning, and often other family affairs in one place, so the family's assets are managed cohesively rather than piecemeal. We keep the underlying entities organized so the office's administration and compliance are handled.

How does a family office use entities?

It commonly holds investments and assets in dedicated entities, isolating and organizing them, and may layer trusts for protection and estate planning, so entities are central to how it operates. We form and organize these so the structure works cohesively.

Does a family office involve trusts?

Often: family offices frequently combine entities with trusts for asset protection and multi-generational estate planning, so trusts are a common component. We form and organize the entity side and coordinate with the trust and estate counsel who structure the trusts. See asset protection.

What compliance does a family office have?

Its entities file annual reports, keep registered agents, and handle their taxes, and the overall structure involves ongoing administration, so a family office carries real, layered compliance. We track the entity filings so the structure stays compliant across all its parts.

Is a family office right for my situation?

It fits substantial, complex wealth that benefits from coordinated management, while simpler situations are served by ordinary entity and estate planning, so it is not for everyone. We flag whether your situation genuinely calls for a family office so you do not build more structure than you need.

Can File.Business help set up a family office structure?

We form and organize the entities a family office uses, keep them compliant, and coordinate with the trust, tax, and estate professionals who design the broader structure, so the entity foundation of your family office is built and maintained correctly.

Build your family office with File.Business.

From the parent holding entity down to every subsidiary, one team, one structure, one calendar.

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2025 BOI rule update US entities are now exempt. Check if you still need to file →
Niche EntityA holding company is an LLC (or Corporation) whose primary purpose is to own equity in subsidiary operating entities, not to operate a business itself. Wyoming and Delaware are the