The main difference between a family office and an RIA is who they serve. A registered investment advisor (RIA) is a firm registered with the SEC or a state to give investment advice for a fee, usually to many clients. A single family office manages one family's wealth. Multi family offices sit in between and are usually RIAs.
What is an RIA?
An RIA is an investment advisor registered with the SEC or a state securities regulator. Key features:
- It advises clients for a fee, often a percentage of assets or a flat fee.
- It owes its clients a fiduciary duty.
- It files Form ADV, a public disclosure document that describes its business, fees and conflicts.
- It can serve individuals, families, institutions and funds.
Many RIAs serve wealthy families, and some describe part of their offer as "family office services."
What is a family office?
A family office is a private organisation that manages the wealth and affairs of a family. A single family office (SFO) serves one family and is funded by it.
Under US rules, a single family office can qualify for the SEC's family office exclusion from adviser registration. Broadly, it must serve only family clients, be owned and controlled by the family, and not present itself to the public as an investment advisor. For the basics, see our guide to what a family office is.
Where multi family offices fit
A multi family office (MFO) serves several families and charges them fees. Because it advises more than one family for compensation, it usually registers as an RIA.
Many MFOs are RIAs that specialise in wealthy families and add services such as tax coordination, reporting and family governance. So "family office vs RIA" is mostly a question of single family office vs advisor to many, with multi family offices in both camps. Our guide to single family office vs multi family office covers the split in more detail.
Family office vs RIA: side by side
| RIA | Single family office | Multi family office | |
|---|---|---|---|
| Clients | Many | One family | Several families |
| Registration | Registered adviser | Often exempt (family office rule) | Usually a registered adviser |
| Revenue | Fees from clients | Funded by the family | Fees from client families |
| Public filings | Form ADV | Usually none | Form ADV |
| Investment style | Portfolio advice, often public markets and funds | Anything the family wants, often direct deals | Advice plus access to private investments |
When each one fits
- For a family: an RIA fits when you want professional portfolio management without building a team. A single family office fits when the wealth and its complexity justify dedicated staff; our guide to family office minimum net worth looks at that point. An MFO sits in the middle, with shared resources and family-focused service.
- For a family building its own office: the registration question is one for counsel. It turns on who you serve and whether you charge.
- For a fund manager: RIAs and MFOs are allocators you can find through public filings. Single family offices you find through verified databases and relationships.
- For a vendor: an RIA buys like a business. A single family office buys like a family, with fewer people, more discretion, and decisions made close to the principal.
How family offices and RIAs work together
- SFOs hire RIAs. Many single family offices give specific mandates, such as public equities or fixed income, to outside RIAs while keeping private deals in house.
- MFOs are RIAs. A family that joins an MFO is, in most cases, the client of a registered advisor.
- SFOs can become MFOs. When a single family office starts serving other families for a fee, its registration position can change, so offices review this with counsel before taking on outside clients.
This is general information, not legal or tax advice.
FAQ
Is a family office an RIA?
It depends on the type. A multi family office that advises several families for a fee is usually a registered investment advisor. A single family office that serves only one family can often rely on the SEC's family office exclusion and stay unregistered, provided it meets the conditions of that rule.
Do single family offices have to register with the SEC?
Many do not need to. A single family office that serves only family clients, is owned and controlled by the family, and does not present itself to the public as an investment advisor can qualify for the family office exclusion. Families confirm their position with counsel, because the details matter.
What is the difference between a multi family office and an RIA?
Most multi family offices are RIAs, so the difference is focus. An MFO serves a small number of wealthy families and adds services such as tax coordination, reporting and governance. A typical RIA serves a broader client base and centres on portfolio advice, often in public markets and funds.
How do I find family offices and RIAs to pitch?
RIAs and most multi family offices file Form ADV, so you can find them through public filings. Single family offices usually file nothing public, so fund managers find them through verified databases, warm introductions and relationships built over time.
Related comparisons
- Family office vs trust
- Family office vs private bank
- Family office vs family foundation
- Family office vs investment holding company
The bottom line for a capital raiser
If you are raising capital and need the family offices in your market (each verified as active, with a live website) with their investment domains and decision-makers, see the Full USA Database and Full Worldwide Database.