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ファミリーオフィスを構築する · 5つのステップ

Step 2: Inventory the Family's Assets

6 分で読めます 更新日 Aug 07, 2026
A family asset inventory is a complete, structured list of everything a family owns and everything it owes — cash, investments, real estate, operating businesses, trusts, insurance, collectibles, debt, and contingent liabilities. It is the essential second step in building a family office because you cannot design the right organizational infrastructure around wealth you have not fully mapped. The inventory becomes the foundation for consolidated reporting, tax planning, legal structuring, and governance decisions.
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Why the Inventory Comes First

Before a family can decide how to organize itself — which entities to use, how many people to hire, which functions to outsource — it needs a single, honest picture of what it actually has. That picture is the asset inventory. Think of it as the balance sheet a family office will maintain forever, built carefully for the very first time.

This step follows naturally from defining the family office's purpose. Once a family knows why it is building an office, the inventory reveals what that office must actually manage. A family with three operating companies, a ranch, and a dozen private fund stakes needs very different infrastructure than a family whose wealth sits primarily in a brokerage account and a primary residence.

A family office is organizational infrastructure built around significant wealth — and you cannot design good infrastructure without knowing what it is surrounding.

The Asset Side: What Families Own

Families commonly hold wealth in more categories than they initially realize. A founder who sold her logistics company may have wired proceeds into a brokerage account, but she may also hold rollover equity in the acquirer, a commercial building the business once occupied, two limited partner interests in private funds, and a life insurance policy with meaningful cash value. Each of those is a distinct asset class requiring different management attention.

Liquid and Near-Liquid Assets

These are assets that can be converted to cash quickly and with low friction. They include checking and savings accounts, money market funds, U.S. Treasury bills, and publicly traded stocks and bonds held in brokerage or separately managed accounts. Liquidity — the ease with which an asset can be sold at a fair price — is one of the most important characteristics to record for every line item.

Illiquid and Long-Duration Assets

Alternative investments — such as private equity funds, venture capital stakes, private credit vehicles, and hedge funds — are often locked up for years. Families commonly hold interests in these through limited partnerships or special purpose vehicles (legal entities created for a single transaction). Each fund position has its own capital call schedule — the timing of when committed but uncalled money must be delivered — and its own distribution timeline.

Real estate deserves its own line (or many lines): primary residence, vacation properties, rental buildings, raw land, and interests in real estate partnerships all behave differently and carry different obligations. Operating companies — whether fully owned or partially owned — must be listed with their approximate value and any associated debt.

Retirement Accounts, Insurance, and Other Assets

IRAs, 401(k)s, and similar retirement accounts are often held separately from the main investment portfolio but represent significant wealth. Life insurance policies with cash value are assets that double as planning tools. Collectibles — art, wine, jewelry, classic vehicles — are real assets even if they feel personal. Intellectual property, royalties, and deferred compensation arrangements round out the list for many families.

The Liability Side: What Families Owe

The liability side of the inventory is just as important as the asset side — possibly more so, because liabilities carry legal obligations and cash flow demands that can disrupt even a well-run office.

Net worth — total assets minus total liabilities — is the number that actually matters. A family with illustrative gross assets of $50 million and $20 million in debt is in a fundamentally different position than one with $30 million in unencumbered assets, even though the asset totals look similar on the surface.

Types of Liabilities to Capture

  • Mortgages and real estate loans — tied to specific properties, with interest rates, maturities, and covenants
  • Margin loans and securities-backed lines of creditsecurities-backed lending uses investment portfolios as collateral; market drops can trigger margin calls
  • Business debt — loans at the operating company level that may carry personal guarantees
  • Personal guarantees — a family member's promise to repay someone else's debt if that party defaults; these are contingent liabilities that do not appear on a standard balance sheet until triggered
  • Unfunded capital commitmentscommitted capital pledged to private funds that has not yet been called; this is a real obligation even though no cash has moved
  • Pending litigation or tax disputes — contingent liabilities that may or may not materialize but must be documented
  • Deferred tax liabilities — unrealized gains in taxable accounts represent a future tax obligation; qualified attorneys and CPAs must help families understand the precise implications

A Practical Inventory Table Template

Families commonly organize the inventory in a structured table — one row per asset or liability, with consistent columns across every category. The table below is an illustrative template; the exact columns a family uses should be tailored to its situation with guidance from its advisors.

Category Asset / Liability Name Owner / Titleholder Holding Entity or Account Approximate Value (Illustrative) Liquidity Key Contacts / Custodian Notes / Obligations
Cash & Equivalents Operating checking account John & Mary Smith Joint account $X Immediate Bank of — Daily operating cash
Public Securities Diversified equity portfolio Smith Family Trust SMA at Custodian A $X 1–3 days Custodian A Low-basis positions — see tax notes
Private Equity / VC Fund ABC, LP Smith Partners LLC LP interest $X (NAV per latest statement) Illiquid — 2027 vintage GP: Firm XYZ $X unfunded commitment remaining
Real Estate Commercial building — Denver Smith RE LLC Wholly owned LLC $X (last appraisal) Low — months to sell Property manager: — $X mortgage; matures 20XX
Operating Company Acme Manufacturing, Inc. John Smith (60%), partners (40%) C-Corp $X (last valuation) Very low — no ready market CFO: — $X line of credit; personal guarantee
Life Insurance Whole life policy #12345 ILIT Irrevocable trust $X cash value / $X death benefit Moderate — surrender possible Carrier: — Annual premium due March
Collectibles Art collection (12 works) Mary Smith Personal ownership $X (last appraisal) Low — auction required Appraiser: — Fine art insurance rider
Liability Primary residence mortgage John & Mary Smith Joint ($X outstanding) N/A Lender: — Fixed rate; matures 20XX
Contingent Liability Personal guarantee — Acme LOC John Smith Personal (Amount at risk: $X) N/A Lender: — Triggered only on default

Ownership and Titling Matter as Much as Value

The "Owner / Titleholder" and "Holding Entity" columns are not administrative housekeeping — they shape every tax, legal, and governance decision the family office will ever make. An asset held in a revocable trust behaves differently at death than one held jointly. An asset inside a family limited partnership has different transfer and valuation characteristics than one held in an individual's name.

Families commonly discover during the inventory process that titling is inconsistent — some assets are in an old trust that was never updated, others are in a spouse's name for historical reasons, and others sit in entities created for a transaction that was never fully unwound. Qualified attorneys must review titling before the family office finalizes its organizational structure.

From Inventory to Consolidated Reporting

The inventory is a point-in-time document, but its real value is as the seed of consolidated reporting — the ongoing process of tracking every asset and liability in one unified view. Consolidated reporting answers the question "what is our true net worth today?" across every account, entity, and asset class, updated on a regular schedule.

Without an accurate starting inventory, consolidated reporting cannot be built correctly. Gaps discovered later — an overlooked LP interest, a forgotten guarantee, a life insurance policy held by a trust that wasn't listed — create blind spots that affect investment decisions, tax planning, and estate work. The inventory is the single source of truth the entire family office is built on.

As the office matures, the inventory feeds into net asset value calculations, asset allocation analysis, liquidity planning, and the investment policy statement. Doing it carefully at the start saves significant rework later.

よくある質問

What assets are commonly missed in a family office inventory?
Families frequently overlook unfunded capital commitments to private funds, the cash value inside life insurance policies, contingent liabilities from personal guarantees, and deferred tax obligations on low-cost-basis positions. Collectibles and intellectual property — royalties, patents, or deferred compensation — are also commonly left off early drafts. A thorough review with qualified attorneys and CPAs helps surface items that do not appear on standard financial statements.
Why does titling matter so much during the asset inventory?
Titling — the legal name on an asset — determines who owns it, how it transfers at death, and how it is taxed. An asset held jointly passes differently than one held in a trust or a family LLC, and the difference can have significant legal and tax consequences. Families commonly discover inconsistent or outdated titling during the inventory process, making it an important trigger for a legal review before the office structure is finalized.
Should the inventory include assets held in trusts for children or grandchildren?
It depends on the purpose of the inventory. Assets held in irrevocable trusts for beneficiaries are generally not part of the grantor's personal net worth, but many families track them in a separate schedule for planning and coordination purposes. The family office often serves as the administrative hub for multiple trusts, so understanding all trust assets — even those not owned by the principal — helps the office coordinate tax filings, distributions, and trustee reporting effectively.
How often should the asset inventory be updated?
Most families update the inventory at least annually, with interim updates triggered by major events such as a business sale, a new fund investment, a real estate acquisition, or a significant change in debt. Over time, the inventory is typically absorbed into a consolidated reporting system that refreshes automatically for liquid assets and on a scheduled basis for illiquid ones. The goal is a living document, not a one-time exercise.
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続きを読む

ファミリーオフィス

What Is a Family Office?Do You Need a Family Office?Single Family Office (SFO)Multi-Family Office (MFO)Micro Family OfficeWhat a Family Office CostsWhy Family Offices Exist

ファミリーオフィスを構築する

How to Build a Family Office From the Ground UpStep 3: The Organizational StructureStep 4: Internal vs. Outsourced (Build vs. Buy)The First 90 Days: Turning the Lights OnStep 1: Define the Family Office's PurposeStep 2: Inventory the Family's AssetsStep 5: Hire the Core Team

投資

How Family Offices InvestDirect InvestingAsset Allocation for Family CapitalThe Investment Policy Statement (IPS)Liquidity, Concentration, and RiskPublic Markets: Equities and Fixed IncomeReal Estate in the Family Portfolio

オペレーション

Family Office AccountingFamily Office TechnologyFamily Office CybersecurityConsolidated Reporting: One True Net WorthBill Pay, AP, and Financial ControlsFamily Office Software, Category by CategoryBanking, Custody, and Treasury

ガバナンスと相続

Family GovernanceEstate Planning and Wealth TransferHow Family Offices Manage TaxPhilanthropy and the Family OfficeThe Family ConstitutionSuccession: The Office After the FounderPreparing the Next Generation

業界

Careers in Family OfficesHow the Family Office Industry Is ChangingFamily Offices and Regulation

役割と人員配置

Family Office Roles & Staffing, MappedFamily Office CEO / President / Managing DirectorChief Investment Officer (CIO)Portfolio Manager / Investment DirectorAsset Manager (Real Assets)Chief Financial Officer (CFO)Controller

比較

Single vs. Multi-Family OfficeFamily Office vs. Wealth ManagerFamily Office vs. RIAFamily Office vs. Private BankFamily Office vs. Financial AdvisorFamily Office vs. Hedge FundFamily Office vs. Private Equity Firm