How much money do you need for a family office?

A dedicated single-family office is generally a several-hundred-million-dollar undertaking: advisers who help families set one up put the practical starting point near $500 million. A multi-family office delivers the same scope of work to ultra-high-net-worth families well below that level because families share in the operating costs.

Key takeaways

• Families weighing their own office often consider $500 million or more the point where a single-family office makes economic sense.
• There is no fixed family office minimum net worth, but because of operating expenses, a family’s net worth must be large enough to absorb the costs of running the firm.
• Multi-family offices set their own minimums and prices, typically as a percentage of assets or a flat retainer.

The complete guide to family offices is your foundational resource to learn how the family office model works.

What a single-family office costs to operate

Across 333 family offices surveyed in 2026, the average office spent $3 million a year, while 11% spent more than $7 million. Larger offices have higher absolute costs; however, they typically pay less as a share of their assets under management because they benefit from economies of scale.

By size, offices between $250 million and $500 million spent $1.7 million; offices between $500 million and $1 billion spent $3.2 million, and offices above $1 billion spent $6.6 million.

Operating costs go primarily toward staffing and personnel, software services and cybersecurity, legal and tax compliance, and outsourced vendors.

How a family’s needs impact the cost structure of a firm

Every wealthy family has its own set of unique circumstances: concentrated stock from a founder’s shares, real estate in several states, trusts for a third generation, a foundation with grants to administer, or an operating business the family still controls. Each calls for different specialists and a different set of outside providers, which can affect costs more than portfolio size alone.

Whatever the office does not staff in-house, it must outsource. 80% of family offices outsource some portion of portfolio management, and offices most often send legal services (52%), trading and execution (45%), and cybersecurity (38%) to outside providers, which together account for roughly a quarter of an office’s total operating cost.

Each specialized need a family adds, whether covered by a hire or a vendor, raises the office's annual cost and, with it, the asset level at which the office can make economic sense.

Family office options by wealth level

Wealthy families have three main options for wealth management: a traditional advisory firm, a multi-family office, or a single-family office. Your decision, in part, depends on your wealth level and the complexity of your needs.

• Below roughly $10 million. A dedicated office is out of reach at this level, and most multi-family offices set their minimums at or above it, so a conventional advisory firm usually fits.
• Around $10 million to several hundred million. Across this range, the multi-family office model is ideal for most families. Families access a full scope of services, and sharing keeps costs proportional to their assets.
• Around $500 million and above. At this scale, both multi-family offices and single-family offices can be viable options. The choice comes down to control, privacy, and whether the family wants to own and manage a professional services firm with its own staff, systems, and hiring decisions.

Multi-family office fees: what firms charge

A multi-family office spreads one professional team across a limited number of families, so each family can access its capabilities without taking on the full payroll. Multi-family offices price their work two different ways.

A percentage of assets under management

Most registered advisers use this structure: an annual fee calculated on the assets the firm oversees for the client.

Flat or scoped retainers

Firms can also charge flat or scoped retainers for family office services that fall outside portfolio management, such as bill pay coordination, consolidated reporting, or entity administration. Some firms combine the two forms, an asset-based fee for the investment work and a retainer for the administrative scope.

Multi-family office minimums

Published minimums range from less than $10 million at larger platforms to substantially higher at boutiques that limit how many families they serve. A firm with a high minimum serves few families, so each family gets more of the team's time. A firm with a low minimum serves many families, and the same team spreads across them all.

A family deciding between firms learns the most by asking how many families the team serves and what services the minimum includes. Yale Capital's FAQs answer the most common questions about custody and minimums.

Is a single-family office right for you?

A single-family office can make economic sense once a family holds several hundred million dollars and has enough complexity to keep a dedicated staff busy: operating businesses, properties, trusts across generations, a foundation, or direct investments. Below that level, the office's fixed cost takes too large a share of returns, and families with relatively simple holdings do not generate enough work to justify a full-time team.

Families who need the services but not the staff can access the same scope of work through a multi-family office. For most ultra-high-net-worth families below several hundred million, a multi-family office provides the coordination a single-family office would, at a fraction of the cost and without the work of hiring and managing a professional staff. Setting up a family office: build one or partner with one compares the two paths, step-by-step.

The decision comes down to three questions:

• Are your investable assets large enough for a dedicated office's cost to be a small share of returns?
• Are your holdings complex enough to require full-time specialists?
• Does owning and managing a firm fit with your personal life, and are you comfortable with employment risk?

Yale Capital Corp provides family office services to a select number of ultra-high-net-worth families, including multi-generational families, and sets out the scope and economics of an engagement plainly before any commitment. A conversation about how these costs apply to your own situation is confidential and costs nothing.