The Single Family Office: Converting Wealth into an Enterprise

Tax Tips / Family Office (L4)

The Single Family Office: Converting Wealth into an Enterprise

By Team BMT Jan 03, 2026

💡 Executive Summary

  • Problem: Managing 10+ trusts (SLAT, GRAT, Dynasty) and disparate assets creates chaos and compliance risk.
  • Solution: Establish a Single Family Office (SFO) to centralize investment, tax, and legal functions.
  • Result: Institutional-grade efficiency, privacy, and the ability to deduct investment expenses (IRC § 162).
⚠️ THE “SECTION 162” DEDUCTION
Since TCJA 2017, individuals cannot deduct investment management fees. However, a properly structured Family Office (Trade or Business) CAN deduct salaries, tech, and data costs. This alone often pays for the office.

At the $100M+ level (Tier L4), you are no longer just an “investor”; you are an “institution.” The Family Office is the super-structure that governs the FLPs, GRATs, and Dynasty Trusts we have built, ensuring they work in concert, not conflict.

🧐 Core Definition: SFO vs. MFO
Single (SFO): Serves ONE family. Total control, high privacy, high cost.
Multi (MFO): Serves many families. Shared cost, less customization. SFOs often outsource specific tasks (e.g., tax prep) to MFOs.

Performance Simulation

Cost Efficiency ($100M Portfolio)
Traditional Wealth Mgmt (1% Fee) $1.0M / Year (Non-Deductible)
High Drag
SFO Structure (Direct Costs) ~$600k (Tax Deductible*)
Optimization

The “C-Suite” of Your Family

Role Responsibility Strategic Value
CIO Chief Investment Officer Asset Allocation & Manager Selection
General Counsel Legal & Compliance Trust Governance (The “Ref”)
CFO / Controller Tax & Accounting Cash Flow & “Bill Pay”
“A Family Office is not a luxury; it is a necessity for complexity management. It turns a loose collection of bank accounts into a disciplined, perpetual enterprise.”
BMT designs for tax reality, not theory.