What Is a Family Office? Models, Services & Fit

Quick answer

A family office can bring together investment oversight, financial administration, tax and legal coordination, governance and family services. It may employ its own team, use a provider serving several families or combine a small internal team with outside specialists. There is no universal service package. 1

Question	Answer
What distinguishes the main models?	The families served, ownership, staffing and allocation of responsibilities. Commercial labels do not settle all four. 1
Is there a legal wealth minimum?	The SEC's family-office exclusion sets no minimum net worth, investable assets or assets under management. Its conditions concern clients, ownership, control and public presentation. 2
Does the office have to manage investments?	Investment management, investment advice, administration and coordination are distinct functions. A service proposal should specify which responsibilities the office or provider will take. 1 3
What should a cost comparison include?	The office or provider fee, plus separately paid specialists and investment-related charges. An operating-cost benchmark is not an all-in family budget. 4

What a family office does

The work extends beyond choosing investments. The Campden Wealth/RBC 2026 report describes functions including accounting, reporting, bill payment, human resources, succession, family governance, technology, tax and legal work. Participating offices deliver these through different combinations of employees and outside providers. The list describes possible responsibilities, not a standard package. 1

Function	Work to define in the engagement
Investment oversight	Investment policy, allocation advice, manager selection and monitoring; specify whether anyone can trade without prior approval.
Accounting and administration	Maintaining records, tracking cash, preparing reports, processing bills and coordinating payroll.
Tax, estate and entity coordination	Collecting information, managing deadlines and coordinating the accountants and attorneys responsible for advice, filings and documents.
Family governance and succession	Defining decision roles, organizing family discussions, preparing future decision-makers and planning transitions.
Philanthropy	Coordinating giving decisions, foundation administration and relevant professional advice.
Family and household services	Defining responsibilities for staff, property, vendors and personal administration where these services are offered.

These categories summarize the 2026 Campden Wealth/RBC service framework. A provider's own documents must establish its particular role.

For any function, separate doing the work from supervising it. An office might collect documents for a tax return while an outside accountant prepares and files it. It might review an investment manager's performance while the manager retains trading authority. A consolidated report brings information together; it does not by itself confer control over the accounts. 1 3

Explore the services and delivery arrangements.

Family-office models

The market uses overlapping names. Campden Wealth/RBC's 2026 report distinguishes dedicated, embedded, virtual, family-owned multi-family and commercial multi-family offices. Its definitions help describe arrangements; they are not government designations. 1

Term	What it describes	What the label leaves unanswered
Single-family office	An office serving one family. The report distinguishes a standalone family-owned office from one embedded in a family business. 1	Which people and entities are served, which functions are staffed internally and who supervises the team.
Embedded family office	Family-office functions carried within the family's operating business rather than a fully separate office. 1	Which staff, systems and costs belong to the business and which serve the family.
Multi-family office	An arrangement serving more than one family. The report distinguishes offices owned by participating families from commercial providers owned by financial-services firms. 1	Which staff are dedicated or shared, what each family pays for and who controls decisions.
Virtual family office	In the report's framework, a small internal coordinating team relying on specialist external providers. Other firms may use the term differently. 1	Who coordinates the specialists, employs the team and owns the records and systems.
Outsourced family office	A description of work assigned to external providers. It can cover selected functions alongside an existing office or a broader arrangement. 1 5	What remains with the family and whether the provider performs, advises on or coordinates each task.
Private family office	A phrase requiring context. The report uses “private multi-family office” for a family-owned arrangement; individual firms also use “Private Family Office” as their public description. These uses do not establish equivalent ownership or services. 1 6	The actual ownership, staffing, scope and authority behind the provider's wording.
Operating or chief-of-staff role	A way to frame the management job: who supervises people, coordinates providers and follows through on administration. A provider may offer operating support alongside advice; Corient's Personal CFO service is one documented example of that overlap. 7	The employer, reporting line, contracting arrangements and delegated authority. A title alone does not establish them.

The SEC exclusion is a separate test

The SEC's rule provides an exclusion from the federal Investment Advisers Act definition of investment adviser for a qualifying family office. Subject to the rule's definitions and exceptions, the company must advise only family clients, be wholly owned by family clients, be exclusively controlled by family members or family entities, and refrain from holding itself out publicly as an investment adviser. “Family client” has a specific meaning under the rule, rather than simply meaning anyone a family wishes to include. 2

SEC staff describes this as a single-family-office exclusion. Its FAQ says offices serving separate families through the same or substantially the same investment-advisory employees may form a de facto multi-family office that cannot rely on it. That does not mean every outside specialist working for several families creates a multi-family office. 8

A commercial family-office label therefore does not establish an exclusion, a registration status or a conclusion about taxes. Identify the legal entity and the particular service before interpreting its regulatory disclosures. 2 8

Who may need one

An assessment begins with recurring work. Multiple generations, operating businesses, private investments and obligations across jurisdictions can create coordination needs that a portfolio statement does not capture. Morgan Lewis's 2026 framework weighs this complexity alongside control, cost and the family's willingness to support infrastructure. 5

Ask where responsibility is breaking down. Are advisers waiting for information from one another? Who maintains the complete record of entities and obligations? Who follows up when a principal approves a decision? These questions help define a job before committing to an organization.

The answer may be a dedicated office, a shared provider, a small coordinating team or additional support for an existing office. Compare the proposed arrangement with the work it would remove from family members and the work they would retain. 5

Consider the circumstances that may justify an office.

Costs and minimums

The SEC exclusion contains no asset or net-worth floor. A provider can still impose a commercial account minimum or annual fee minimum, and a family employing its own team must assess whether the operating cost is sustainable. Those are separate questions. 2 1

Measure	How to interpret it
SEC eligibility	No minimum net worth, investable assets or assets under management in this exclusion's conditions. This is a regulatory test, not economic guidance. 2
Dedicated-office economics	Campden Wealth/RBC's September 2026 report gives $100 million to $250 million in private wealth as a working range where a dedicated single-family office may become cost-effective, depending on operating costs and complexity. It also says there is no fixed threshold for benefiting from an office. This is the authors' guidance, not a legal minimum or provider offer. 1
Provider minimum	Check whether a stated threshold means an account balance, investment assets, total net worth or an annual fee. Do not substitute one measure for another.
Total family cost	Add the work excluded from the proposed fee. The 2025 Campden Wealth/RBC operating-cost measure, for example, excludes investment-related fees paid to banks and outside managers. 4

Net worth includes assets less liabilities. Assets under management measures assets managed under a particular mandate; it does not describe everything the family owns. A business's sale price is also different from an individual shareholder's proceeds. Keep the measure attached to every threshold and quote.

Examine fee models, cost evidence and minimums.

Family office vs. private bank and adviser

There is substantial overlap in the work offered. J.P. Morgan Private Bank's US family-office menu includes investment services, wealth and estate planning, trust administration, governance, banking, lending and custody. It also describes working with the family's office and outside attorneys. A bank can therefore support an office as well as provide services a family might otherwise seek from one. 3

Separate the roles. An investment adviser may recommend or manage investments. A custodian holds assets. A bank may lend. A trustee administers a trust under its governing terms. A coordinator follows work across providers. One group may offer several of these services through different entities; its family-office branding does not identify the contracting entity or the authority granted for each role. 3 9

Compare the engagement with the work you need done. Ask who will maintain records across institutions, supervise staff and specialists, and resolve missed deadlines. Review investment authority, custody, fees and conflicts separately. An institution's breadth matters only to the extent that the selected services address those responsibilities.

Compare family-office models, private banks and advisers.

How to evaluate providers

Ask for a written allocation of responsibilities, a named contracting entity and a fee proposal tied to that scope.

Who performs each recurring task, and who checks that it is complete?
Which people work only for this family, and which serve other clients?
Who employs staff and contracts with outside professionals?
Who can trade, move cash, approve bills or sign on an account?
Which services require separate agreements or additional fees?
What reports will the family receive, and which assets or obligations will be excluded?
Who owns the records and systems, and what can the family take when the arrangement ends?
Which affiliated services or referral arrangements create financial incentives?

Examples to investigate

These are unranked examples of different stated capabilities, presented alphabetically and checked October 19, 2026. They illustrate scope; inclusion is not a recommendation or a finding about service quality. How we assess evidence.

Bessemer Trust

Multi-family office and trust business. Its family-office menu lists custody and consolidated reporting, private banking, bill payment, accounting and human-resources support. Its services span separately identified legal entities. 10 9

See Bessemer Trust in the directory. Last researched October 19, 2026.

Pathstone

Advisory and family-office services. Its current capabilities include investment services, tax work, family governance, administration and lifestyle/property services. Pathstone says some services may be provided by third parties under separate agreements; the engagement determines the delivery. 11

See Pathstone in the directory. Last researched October 19, 2026.

Rockefeller Global Family Office

Wealth advice and family-office services. Its March 2026 brochure distinguishes financial planning and family-office counseling from selected services such as bill pay, reporting and tax planning, which can be separately scoped. 12

See Rockefeller Global Family Office in the directory. Last researched October 19, 2026.

WE Family Offices

Family-wealth advice and coordination. Its service page lists investment advice, governance, succession, consolidated reporting and work with an outside-provider network. That description does not establish direct household operations or tax-return preparation. 13

See WE Family Offices in the directory. Last researched October 19, 2026.

A label with limited public detail: Mayfair

Mayfair describes itself as a “Private Family Office” and says “By introduction only” on its matching company profile. The website could not be retrieved during this research, so its service scope, fees and operating arrangements remain unverified here. Those words alone do not establish how it performs any particular function. 6

This is an evidence limit, assessed under the same methodology as the other entries. See Mayfair in the directory. Last researched October 19, 2026.

Frequently asked questions

Is there a minimum net worth to have a family office?

The SEC's family-office exclusion has no net-worth minimum. A provider's account or annual fee minimum is a separate commercial condition. The economics of employing a dedicated team also depend on its cost and the work required; the Campden Wealth/RBC 2026 report explicitly rejects a fixed threshold for who may benefit. 2 1

Is a family office an investment adviser?

The name alone does not answer that. Some providers offer investment-advisory services. A qualifying family office can rely on the SEC exclusion from the federal definition of investment adviser, subject to its conditions. Check the entity and the service rather than interpreting a commercial label as a regulatory status. 2 8

What is the difference between a single-family and a multi-family office?

A single-family office serves one family; a multi-family arrangement serves more than one. Ownership, staffing and the scope of shared services still need checking. Campden Wealth/RBC distinguishes family-owned multi-family offices from commercial providers, rather than treating every shared office as the same structure. 1

Can an existing office outsource selected functions?

Yes. The Campden Wealth/RBC and Morgan Lewis frameworks describe combinations of internal staff and external specialists. Define who will supervise each outsourced function, who contracts for it and which responsibilities remain inside the office. 1 5

Does a family office prepare tax returns or legal documents?

That depends on the provider and agreement. Tax and legal coordination are part of the reported service landscape, but coordination does not establish that the office prepares a return or provides legal advice. Specify the professional who will perform and sign the work, and whether that engagement is separate. 1

Sources

Campden Wealth/RBC, The North America Family Office Report 2026, pp. 8, 32 and 44–45. Primary research report; September 29, 2026; accessed October 19, 2026. Model descriptions and economic guidance are the report authors' framework, not legal categories or eligibility rules.
SEC, Family Office: A Small Entity Compliance Guide. Primary regulatory guidance; 2011 rule; accessed October 19, 2026. Explains the exclusion and its defined terms, exceptions and conditions.
J.P. Morgan Private Bank US, “Family Office Services”. Primary provider description; undated; accessed October 19, 2026. Evidence of this bank's stated offering, not a standard for every bank.
Campden Wealth/RBC, The North America Family Office Report 2025, pp. 6 and 42–43. Primary research report; October 16, 2025; survey April–August 2025; accessed October 19, 2026. Its operating-cost definition excludes outside investment-manager and bank investment fees; the sample is North American, not US-only.
Morgan, Lewis & Bockius, “Control, Cost, and Complexity: Finding the Right Family Office Model”. Primary professional analysis; July 14, 2026; accessed October 19, 2026. Used for qualitative structure and complexity considerations.
Mayfair company profile on LinkedIn. Secondary, externally hosted company-profile evidence; undated; indexed profile checked October 19, 2026. Supports only the quoted public descriptor and introduction-only wording. Direct access to mayfair.co was unsuccessful on that date.
Corient, “Personal CFO”. Primary provider description; undated; accessed October 19, 2026. Describes core and expanded administrative services, including defined signing authority in the expanded offering.
SEC Division of Investment Management, “Staff Responses to Questions About the Family Office Rule”. Primary regulatory staff guidance; relevant answers January 19, 2012; accessed October 19, 2026. Staff interpretation of this exclusion, not a general ruling on every shared-service arrangement.
Bessemer Trust, “Terms and Conditions”. Primary provider/legal disclosure; undated; accessed October 19, 2026. Identifies separate bank, trust, custody and investment-management entities.
Bessemer Trust, “Family Office Services”. Primary provider description; undated; accessed October 19, 2026. Group capabilities; the page does not assign every service to a particular legal entity or agreement.
Pathstone, “Capabilities”. Primary provider description and delivery disclosure; undated; accessed October 19, 2026. Some services may involve third parties and separate agreements.
Rockefeller Global Family Office, Form ADV Part 2A, Items 4–5. Primary regulatory disclosure; March 2026; accessed October 19, 2026. Service-specific descriptions and fees, not a universal family-office package.
WE Family Offices, “Family Wealth Advisory”. Primary provider description; undated; accessed October 19, 2026. Advice, reporting and outside-provider coordination; direct performance is not established for every function.

Research and corrections

Last researched October 19, 2026. Sources and service descriptions reflect the materials checked on that date.

Request a correction or email corrections@familyofficequarters.com. Include the passage, the proposed correction and supporting evidence.