Setting up a family office starts with two questions people merge: what the office will do, and what the law calls it. The SEC’s family office rule turns on who the clients are, who owns and controls the office, and whether it holds itself out to the public as an investment adviser. It sets no asset minimum. The build itself is a list of functions you either staff or buy.
Part of our guide: Family Office.
The short version
- Three conditions, no size test. A family office under Rule 202(a)(11)(G)-1 serves only family clients, is wholly owned by family clients and exclusively controlled by family members or family entities, and does not hold itself out to the public as an investment adviser.
- No asset minimum appears in the rule. The threshold people repeat is commentary about operating cost, not a legal test.
- Serving unrelated families generally breaks the exclusion. That is the line between a single-family and a multi-family office, and multi-family offices typically register as advisers.
- Registration thresholds are a separate rule. SEC versus state registration is governed by 17 CFR 275.203A-1, which carries the current dollar levels and has been amended before.
- The exclusion is narrow. It removes a family office from the Advisers Act definition of investment adviser (15 U.S.C. 80b-2), not from antifraud provisions, tax law, or state-law duties.
- Digital assets add custody and key control, an operations function most family offices are not staffed for.
What the family office rule actually requires
The family office rule exists because Congress removed the private adviser exemption most family offices relied on and told the SEC to define the term instead. What came back is three conditions, not a size test.
Family clients only. Clients have to fall inside the categories the rule defines: lineal descendants and their spouses, plus certain estates, trusts, charitable organizations, and family entities. A defined set of key employees is also permitted, on conditions the rule spells out. Read the categories rather than assume them.
Wholly owned and exclusively controlled by the family. Outside ownership breaks it, and so does outside control arriving through a governance arrangement nobody thought of as ownership.
No holding out. An office that markets advisory services to the public is not relying on this exclusion, whatever it calls itself.
None of that mentions assets under management. A modest portfolio with complicated entities can satisfy the definition. A very large family with one unrelated client can fail it.
Single-family, multi-family, and the outsourced middle
A single-family office serves one family and is what the exclusion was written for. A multi-family office serves several unrelated families, which generally puts it outside the exclusion and into registration as an investment adviser. That difference is regulatory before it is a service difference.
Between them sits what most families run first: a small internal team, sometimes one person, coordinating outside specialists for investments, tax, legal, custody, and reporting. That is not a lesser family office. For many families it is the right version for years.
Decide build versus outsource function by function. Keep in-house what cannot be purchased: governance, decision records, relationships, institutional memory. Buy what is commoditized and audited: custody, tax preparation, portfolio accounting.
The functions a family office has to cover
A family office is defined by its function list rather than its headcount. Six appear in every version, named or not.
- Investment oversight. Policy, manager selection, monitoring, and writing down why a position exists.
- Tax and estate coordination. Sequencing across entities and years, not preparing returns. The expensive mistakes are timing mistakes.
- Reporting. One consolidated view across custodians, entities, and asset types, on a schedule.
- Custody and controls. Who can move an asset, who approves it, and what evidence exists afterward.
- Governance. Who decides, under what mandate, and how disagreement gets resolved.
- Next-generation education. The transfer of judgment rather than assets. Most often deferred, longest lead time.
Where registration thresholds come in
Registration is a separate question from the definition, and the two get conflated constantly. An office that satisfies the exclusion sits outside the Advisers Act definition, so registration never arises. An office that does not falls under 17 CFR 275.203A-1, which decides SEC versus state.
That rule works in tiers rather than as one line. Below a floor, an adviser registers with the state. Above it sits a band where SEC registration is permitted but not required, then a level above which it is required. Once registered, an adviser may stay registered until assets fall below a lower level, so entry and exit differ by design.
Read the current dollar levels at the source, not from an article, including this one. They are set by rule, they have been changed, and a figure repeated from memory is the most common error here. State law is a further layer and it varies.
What digital assets add
Digital assets add a custody and key-control function that traditional family office staffing does not include. For securities, the custodian answers the control question. Self-custodied digital assets move it inside the office, where it becomes key generation, signer policy, device handling, backup, and succession.
Three things follow. The office needs a written custody policy, because control of a private key is control of the asset. Operational risk starts to rival market risk in size, which is not true of a conventional portfolio. And competence with securities does not transfer to key management.
What I actually see
The most common version is a family office that exists in fact and not on paper. Someone is already doing the coordination, usually a family member or a long-serving assistant. The gap is not capability. Nothing is written down, so the arrangement does not survive the person doing it.
The second is a definitional surprise. A family describing itself as a family office finds an unrelated participant inside the structure, a co-investing friend or a business partner’s trust. That participant is often the point of the arrangement, which makes it expensive to find late.
The third is reporting. Several custodians, a few entities, a self-custodied wallet or two, and no statement tying them together. Oversight without a consolidated view is opinion.
What works is starting with the record rather than the org chart. A current inventory of entities, accounts, custodians, and signers does more in year one than a hire does.
Where this goes wrong
The structure gets built before the function list is written.
The specific failures: an office sized to an assumed asset minimum with no legal basis. An unrelated client taken on informally, breaking an exclusion nobody rechecked. Key employees treated as family clients without reading the conditions attached. One person holding the only key, with no successor named. And governance documents signed once, then never used to make a decision.
The decision rule
- Write the function list first, then decide what is staffed and what is bought.
- Read the rule against your actual participants, including anyone who is not a family client, before assuming the exclusion applies.
- Confirm the registration question separately, at the source, if the exclusion does not apply.
- Build consolidated reporting early, because every other function depends on it and it is the one that gets deferred.
- Write a custody policy naming signers, approvals, and succession before the first digital asset moves.
- Put governance in writing while everyone still agrees, since that is the only time it is cheap.
If nobody can answer “what do we own, where is it held, and who can move it” from the record alone, what exists is a set of accounts rather than a family office.
Where this sits
A family office is the coordinating layer above decisions that each have their own answer. What crypto wealth management covers defines the investment function. What a fiduciary advisor is decides whose standard applies to advice the family receives. Whether to use more than one custodian is the concentration question applied to counterparties. Qualified custody versus self-custody is the control decision the custody policy settles. All of it sits inside Family Office.
The office is a structure for making those decisions repeatedly and recording them. It is not a substitute for making them.
Sources
- 17 CFR 275.202(a)(11)(G)-1, Family offices
- 15 U.S.C. 80b-2, Investment Advisers Act definitions
- 17 CFR 275.203A-1, Registration with the Commission
- SEC, Investor.gov glossary, Crypto assets
Related
- How to Choose a Crypto Wealth Manager
- Fee-Only Crypto Financial Advisor
- What Is Digital Asset Custody?
- How Do I Protect Crypto Wealth?
- Corporate Crypto Treasury: Holding Digital Assets
Last updated: 5 August 2026.
This article is general education, not legal, tax, or investment advice. Whether an arrangement meets the family office definition, and whether registration is required, depend on your facts and on the current text of the rules. Talk to qualified securities counsel about your own situation.
