A family office is a private wealth management firm for a single family. There are approximately 10,000 globally managing $6 trillion. Here's how they work, what they invest in, and how they differ from regular wealth management.
Educational content only — not personalized financial, legal, or tax advice.
A family office is a private company that manages the investments, tax planning, estate administration, philanthropy, and personal affairs of a single wealthy family (single-family office, SFO) or a group of wealthy families (multi-family office, MFO). They exist because at a certain level of wealth, the complexity of financial management exceeds what any commercial bank or investment manager can effectively serve, and the stakes justify the cost of a dedicated private infrastructure.
The conventional entry point for a single-family office is approximately $100-250 million in investable assets — below that threshold, the cost of running a private investment operation exceeds the benefit versus using commercial wealth managers. Above that threshold, the cost-benefit shifts: a $500 million family can afford a small team of professionals whose fully-loaded cost of $3-5 million annually represents 0.6-1% of assets — competitive with commercial management fees and offering far more customization.
There are approximately 10,000 family offices globally managing an estimated $6 trillion in assets. They have become major players in private equity, direct lending, real estate, and venture capital — capable of writing large checks without the committees, timelines, and return requirements of institutional investors.
This connects to how sovereign wealth funds manage national wealth at a much larger scale and to The Chaebol System.
The scope of a typical large single-family office extends well beyond investment management:
Investment management: Portfolio construction across asset classes — public equities, private equity, real estate, hedge funds, direct lending, venture capital, and increasingly direct investments in companies. Family offices have shifted heavily toward alternatives: a 2023 survey found family offices allocating approximately 46% to alternative investments versus 31% to public equities.
Tax planning: Multigenerational wealth requires sophisticated tax structuring. Grantor Retained Annuity Trusts (GRATs), Spousal Lifetime Access Trusts (SLATs), Qualified Opportunity Zone investments, and charitable vehicles (donor-advised funds, private foundations, charitable remainder trusts) are standard tools. The family office coordinates legal, accounting, and financial expertise to minimize tax across the family's global holdings.
Estate and succession planning: Preserving wealth across generations requires legal structures (trusts, LLCs, family limited partnerships) and governance frameworks (family constitutions, investment policy statements, next-generation education programs) that commercial managers can't effectively provide.
Philanthropy management: Large families typically have significant philanthropic programs. The family office manages grantmaking, foundation administration, impact investing, and reporting.
Concierge services: At the highest wealth levels, family offices manage private aviation, yacht management, art collection administration, property management, household staffing, security, and personal assistant functions. The family office is effectively running a small institution.
Family offices have several structural advantages over institutional investors:
Permanent capital: Unlike a private equity fund with a 10-year life, a family office has no redemption pressure and no mandate to return capital. This enables truly long-term investing — holding positions for decades, surviving market cycles without forced selling.
No committee approval: A decision that requires a 20-person investment committee at a pension fund can be made by two people at a family office. Speed in private markets is genuinely valuable.
Co-investment appetite: When private equity funds offer large institutional investors co-investment rights (the ability to invest directly alongside the fund in specific deals at low or no fee), family offices are ideal co-investors — they can move quickly and write meaningful checks.
Flexible mandate: A family office can invest in anything it finds attractive — emerging market bonds, Japanese small-cap equities, farmland, timber, venture, art. No benchmark, no style constraints.
For families with $25-100 million in assets — below the single-family office economic threshold — multi-family offices (MFOs) provide family office-style services to multiple families, spreading fixed costs across clients.
MFOs charge fees similar to commercial wealth managers (0.5-1.5% of assets under management) but offer more customization, more sophisticated tax and estate planning, and a higher-touch relationship model than bank wealth management divisions.
The MFO market has grown significantly: firms like Bessemer Trust, Northern Trust's family office division, Hawthorn (PNC), and Relative Value Partners serve the $10-250 million wealth tier. The distinction between sophisticated MFOs and commercial private banking is increasingly blurred at the high end.