Should You Build Your Own Family Office or Outsource It?

Family Office

Building a single-family office typically makes financial sense at $250M+ in net worth, where the $2M to $5M annual operating cost is a reasonable percentage of assets. Below that, a multi-family office or outsourced family office model delivers most of the same services at a fraction of the cost. The decision is less about wealth level and more about complexity, privacy preferences, and how much control you want over hiring and execution.

The family office question gets asked at the wrong stage in most cases. Founders and executives who just had a liquidity event hear "family office" from peers and assume it means hiring a CIO and CFO and renting office space. That is one version. There are three or four other versions that work better for almost everyone under $500M.

What is a family office and what does it actually do?

A family office is a private wealth management structure that consolidates investment management, tax planning, estate planning, bill pay, philanthropy, and household administration under one roof for a single family or a small group of families. The goal is integration, not access to better products.

The services typically include investment oversight, accounting and bill pay, tax preparation and planning coordination, estate and trust administration, insurance review, philanthropic strategy, lifestyle services like property management and travel, and family governance.

What does a single-family office actually cost to run?

A bare-bones single-family office runs $1.5M to $2M per year. A typical mid-sized office runs $3M to $5M. Larger offices serving multi-generational families with $500M+ commonly run $7M to $15M per year.

Net worth	SFO annual cost	Cost as % of assets
$50M	$1.5M to $2M	3% to 4%
$100M	$2M to $3M	2% to 3%
$250M	$3M to $5M	1.2% to 2%
$500M	$5M to $8M	1% to 1.6%
$1B+	$8M to $15M+	0.8% to 1.5%

Anything over 1.5% of assets is hard to justify against the alternatives. That is why the rough rule of $250M as the breakeven gets cited so often.

What are the alternatives to a single-family office?

The four main alternatives are a multi-family office, a virtual or outsourced family office, a wealth management firm with concierge services, and a hybrid model where you build a small in-house team and outsource the rest.

A multi-family office serves multiple unrelated families under one structure, sharing infrastructure costs. Fees typically run 0.50% to 1.00% of assets. A virtual family office uses a coordinating advisor to assemble a network of specialists (CPA, attorney, insurance, investment manager) without dedicated employees. A wealth management firm with concierge services delivers most family office functions through a single firm at a lower fee.

Model	Best for	Annual cost
Single-family office	$250M+, complex assets, want full control	$2M to $15M+
Multi-family office	$25M to $250M, want institutional rigor	0.50% to 1.00% of assets
Virtual/outsourced family office	$10M to $100M, prefer flexibility	$50K to $300K
Wealth management with concierge	$5M to $50M	0.50% to 1.00% of assets
Hybrid (small in-house + outsource)	$100M to $500M	$500K to $2M

What are the real reasons families build single-family offices?

The economics rarely tell the whole story. Most families that build single-family offices do so for non-financial reasons: privacy, control over hiring and confidentiality, dedicated attention from professionals who serve only them, the ability to centralize complex operating businesses or real estate portfolios, and multi-generational governance.

If your wealth is concentrated in publicly traded securities and a small number of investment funds, the case for an SFO is weaker. If you own operating businesses, complex real estate, illiquid private investments, and you want a structure that survives generational transitions, the case is stronger.

What are the hidden costs people miss?

The hidden costs of running a single-family office include compliance and regulatory burden, key-person risk when senior staff leave, the difficulty of recruiting top talent at small scale, technology and cybersecurity infrastructure, and the management overhead of being an employer.

Most first-generation SFOs underestimate the time the principal spends managing the office itself. You went from running one company to running two.

Which approach should you start with?

For most families with $25M to $250M, a multi-family office or a wealth management firm with embedded family office capabilities delivers 90% of the value at 20% of the cost of building your own. Start there. You can always graduate to a single-family office later when complexity, scale, or generational considerations make it economical.

The biggest mistake we see is families building too early because they want the brand identity of having "their" family office. The second biggest is families who never build one when they really should have, because they got comfortable with a multi-family office that no longer serves their growing complexity.

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