All articles·8 min read·June 30, 2026

The uncomfortable asymmetry

A family office is, in security terms, a strange animal: it carries the balance sheet of a sizable corporation and the staffing of a boutique.

That gap — significant wealth, very few defenders — is precisely what makes it attractive to a capable attacker.

A public company of comparable value runs a security team, segregates duties, and audits its own processes.

A family office often moves the same money through a handful of trusted people who already wear every other hat.

This is general information, not legal advice, and not a substitute for retained counsel or a tailored security assessment — but the structural point is worth sitting with before any incident forces it.

Concentration without the controls

In a corporation, a fraudulent payment usually has to cross several desks.

In a family office, the same instruction can travel from an email to a wire with one or two people in the loop, often the same people who manage the calendar, the properties, and the household.

The wealth is concentrated; the approvals are concentrated; the institutional memory is concentrated.

Remove or deceive one person and the whole structure can be reached.

Deloitte's Defining the Family Office Landscaperesearch counts roughly 8,030 single-family offices worldwide, about 3,180 of them in North America — a quiet population that collectively stewards trillions of dollars with a tiny fraction of the controls a bank applies to a comparable sum.

A team that wears every hat

The strength of a family office — small, loyal, fast — is also its exposure.

There is rarely a chief information security officer, rarely a security operations center, rarely a formal change-control process for who can authorize a payment.

Decisions happen on trust and speed, which is exactly the environment social-engineering attacks are built to exploit.

The point is not that the team is careless; it is that the team was hired to manage a family's affairs, not to defend against a professional adversary.

The principal is, by definition, discoverable

Public companies file disclosures, but their treasury staff are anonymous.

A principal is the opposite: the family name is the brand, the foundation, the building, the deal in the press.

That visibility is often unavoidable and sometimes deliberate — but it hands an attacker a starting map.

Knowing who the principal is, who works for them, and how the household communicates is most of the reconnaissance a convincing impersonation needs.

What the data actually shows

This is not theoretical.

In Deloitte's 2024 survey of family offices, 43% reported a cyberattack in the prior 12 to 24 months, and that figure rose to 62% among offices managing more than US$1 billion.

Nearly a third — 31% — had no incident-response plan at all.

North America was the most-targeted region, at 57%.

The most common attack form was phishing, reported by 93% of those hit — the patient, human approach, not the cinematic breach.

Where the money actually leaves

Phishing is the most common way in; a fraudulent transfer is the most common way money leaves.

The FBI's Internet Crime Complaint Center logged 21,442 business-email-compromise complaints in 2024, with adjusted losses of roughly US$2.77 billion.

For a family office, that is the scenario that matters most: a believable instruction, a real-looking change of bank details, and a wire that cannot be recalled.

The mechanics are worth understanding in their own right — see how business email compromise targets a family and the controls that stop a fraudulent wire.

What changes the math

The asymmetry is real, but it is not fixed.

The same small size that creates exposure also makes a family office quick to improve: a short list of well-chosen controls, applied consistently, closes most of the gap.

Out-of-band verification on payments, least-privilege access for staff, multifactor authentication everywhere, a written and rehearsed response plan, and a deliberate reduction of the principal's public footprint do more than any single product.

For the full enumeration of the risks most wealth managers overlook, the companion piece on family-office cybersecurity risks walks through each one.

A measured first step

Most engagements begin with a quiet conversation rather than an alarm.

The useful question is not “are we a target” — the structure answers that — but “which two or three changes would have stopped the incidents other families in our position have already lived through.”

That is a solvable problem, and a discreet one.