Quick answer: A family office coordinates a family’s wealth across investments, taxes, legal structure, governance, and succession. In this conversation, estate and tax attorney Rustin Diehl explains why treating investment management as a standalone job is a common mistake, and why building tax efficiency and structure in from the start beats retrofitting it later. The views are his; this is education, not legal advice.
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By Jake Claver. Educational content, not investment advice.
Family office planning covers more ground than most people expect going in. It is not only investment management. It is tax planning, governance, and succession, all built around one family’s specific situation. The guest in this conversation, Rustin Diehl, is a tax and estate attorney whose practice focuses on trusts, business structure, and planning for high-net-worth families. What follows explains the topic in plain terms.
What a family office actually does
A family office is the organization, formal or informal, that manages a wealthy family’s financial life in one coordinated place. At the low end it might be a single advisor and an accountant. At the high end it is a dedicated staff handling investments, tax, legal, philanthropy, and family governance. The defining feature is coordination: decisions in one area are made with the others in view, rather than in isolation.
Investment management is the starting point, not the whole job
Choosing how to allocate and manage a family’s assets is where most planning conversations begin, but a functioning family office connects that investment strategy to everything else: how gains get taxed, how the entity holding those investments is set up, and how decisions get made as the family grows. Treating investment management as a standalone function, separate from tax and legal structure, is a common mistake that shows up later as avoidable tax cost or governance conflict.
Tax planning has to be built in from the start
Retrofitting tax efficiency onto an existing structure is almost always harder and more expensive than building it in from the beginning. Entity choices, trust structures, and even the timing of major transactions need to be evaluated for their tax impact before they happen, not after. Two federal pieces sit in the background of most of this planning: the IRS estate tax, which applies to the transfer of property at death, and, for families holding crypto, the IRS treatment of digital assets as property. How your structure interacts with those rules can meaningfully change the after-tax result.
Governance and succession over multiple generations
Whether a family is several generations into managing shared wealth or just starting to build it, the same principle applies: the earlier you put real structure and professional guidance around the wealth, the more options you have and the fewer costly corrections you need to make later. Governance, meaning the rules for how decisions get made and how the next generation is prepared, is what keeps a family office functioning as the family expands. A structure built thoughtfully from the start tends to compound that advantage over decades, while one bolted together reactively spends much of that time and money undoing earlier mistakes.
Why this matters
Most wealth planning failures are not investment failures. They are coordination failures: a tax structure that fights the estate plan, or a succession no one prepared for. Understanding a family office as an integrated system, rather than a fancy name for a portfolio manager, is the single most useful reframe for anyone building or inheriting significant wealth.
Common questions
What is a family office?
It is the arrangement that manages a wealthy family’s financial affairs in a coordinated way, spanning investments, tax, legal structure, governance, and succession, tailored to that family’s situation.
When does it make sense to set up a family office?
There is no single threshold, but the earlier a family puts real structure and professional guidance around its wealth, the more planning options it has and the fewer expensive corrections it faces later. The right form ranges from a single advisor to a dedicated team.
Why is tax planning central to family office work?
Because entity choices, trust structures, and transaction timing all carry tax consequences. Building tax efficiency in from the start is generally cheaper and more effective than retrofitting it onto an existing structure.
Is this video legal or tax advice?
No. It is an educational conversation featuring attorney Rustin Diehl. His comments are general and reflect his own views. Your own plan should be built with a qualified professional who knows your specific situation.
This content is educational only. It is not tax, legal, or investment advice. Check primary sources and speak with a qualified professional before making financial decisions.
Part of our guide: Family Office.
