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Glossary

Fiduciary

A fiduciary is a person or institution legally and ethically obligated to act in the best interest of another party, placing that party's interests above their own.

Fiduciary duty is one of the highest standards of obligation recognized in law. A fiduciary must act loyally (no self-dealing or undisclosed conflicts), prudently (with the care a reasonable, knowledgeable person would apply), and in accordance with any governing document such as a trust agreement or investment policy. Breaching fiduciary duty can result in personal liability, removal from the role, and court-ordered remediation. The standard is stricter than a general obligation to act honestly or professionally.

Families encounter fiduciary relationships in several places at once. A trustee owes fiduciary duty to beneficiaries. An investment advisor registered as such under applicable securities law may owe fiduciary duty to the family office as a client. Directors of a family foundation owe fiduciary duty to the foundation's charitable mission. Recognizing who owes fiduciary duty — and to whom — helps families assign roles clearly and hold service providers accountable. Families should work with qualified attorneys to confirm the specific duties that apply in their jurisdiction.

A common confusion is equating "fiduciary" with "fee-only" — a description of how an advisor is compensated. These are separate concepts. A fee-only advisor may or may not be a fiduciary depending on their registration and the nature of the engagement, and a fiduciary can be compensated in various ways. When families are building their team, clarifying each advisor's legal duty — not just their fee structure — is an important part of governance. The investment management and investment policy functions of a family office are particularly sensitive areas where fiduciary clarity matters.

Related Terms

Family Offices

What Is a Family Office?Do You Need a Family Office?Single Family Office (SFO)Multi-Family Office (MFO)Micro Family OfficeWhat a Family Office CostsWhy Family Offices Exist

Build a Family Office

How to Build a Family Office From the Ground UpStep 3: The Organizational StructureStep 4: Internal vs. Outsourced (Build vs. Buy)The First 90 Days: Turning the Lights OnStep 1: Define the Family Office's PurposeStep 2: Inventory the Family's AssetsStep 5: Hire the Core Team

Investing

How Family Offices InvestDirect InvestingAsset Allocation for Family CapitalThe Investment Policy Statement (IPS)Liquidity, Concentration, and RiskPublic Markets: Equities and Fixed IncomeReal Estate in the Family Portfolio

Operations

Family Office AccountingFamily Office TechnologyFamily Office CybersecurityConsolidated Reporting: One True Net WorthBill Pay, AP, and Financial ControlsFamily Office Software, Category by CategoryBanking, Custody, and Treasury

Governance & Estate

Family GovernanceEstate Planning and Wealth TransferHow Family Offices Manage TaxPhilanthropy and the Family OfficeThe Family ConstitutionSuccession: The Office After the FounderPreparing the Next Generation

Industry

Careers in Family OfficesHow the Family Office Industry Is ChangingFamily Offices and Regulation

Roles & Staffing

Family Office Roles & Staffing, MappedFamily Office CEO / President / Managing DirectorChief Investment Officer (CIO)Portfolio Manager / Investment DirectorAsset Manager (Real Assets)Chief Financial Officer (CFO)Controller

Comparisons

Single vs. Multi-Family OfficeFamily Office vs. Wealth ManagerFamily Office vs. RIAFamily Office vs. Private BankFamily Office vs. Financial AdvisorFamily Office vs. Hedge FundFamily Office vs. Private Equity Firm