Family businesses often represent more than financial success; they embody trust, shared values and a legacy passed through generations. In California, estate planning that includes a family business requires careful attention to fiduciary duties and formal agreements to protect both the business and family relationships.
A fiduciary duty arises when someone is legally obligated to act with the highest degree of good faith for the benefit of another. In California estate planning, this typically applies to trustees, executors or agents under a durable power of attorney. Under California Probate Code § 16040 et seq., fiduciaries must act with loyalty, skill and care, ensuring that the assets and interests of beneficiaries are preserved and managed responsibly.
Family-owned businesses present unique challenges. When multiple family members are involved in management or ownership, disputes may arise that can affect both the business and the estate. A fiduciary managing business assets or family investments must balance duties to multiple beneficiaries while maintaining the integrity and value of the enterprise, consistent with the prudent investor standard under California Probate Code § 16047.
Informal agreements among family members may work during periods of harmony, but they can create problems if relationships deteriorate. In California, formalizing management, control and succession agreements is critical to estate planning. These agreements can define decision-making authority, financial rights and information access, reducing the risk of disputes and helping ensure a smooth transition of assets to heirs.
Even when governing documents like operating agreements, partnership agreements or shareholder agreements exist, California estate planners may need to adjust them to reflect new circumstances or anticipated succession. By clearly outlining responsibilities and expectations, these agreements help safeguard both the business and family relationships.
Estate planning often involves allocating and investing family assets. California law requires fiduciaries to follow the “prudent investor” rule, managing investments with reasonable care, skill and caution while considering the purpose, terms and needs of the beneficiaries. Family fiduciaries who lack investment expertise should seek professional guidance to avoid jeopardizing the estate or causing conflicts among heirs.
The trust, experience and expertise embedded in a family business can be a cornerstone of a successful estate plan. Even if fiduciary duties are not automatically assumed among adult family members in business transactions, establishing clear agreements and governance structures under California law ensures responsibilities are defined and potential conflicts anticipated.
Incorporating these measures into California estate planning protects both the business’s long-term value and the personal bonds that define a family legacy. Thoughtful planning provides a roadmap for smooth transitions, helping families preserve harmony, maintain control of their assets and protect the legacy they have built together.
Send your questions to ccolan@colanlegal.com and use “Alpine Mountaineer estate planning question” as the subject. We’ll answer your questions in our upcoming issues. This article is provided by your local estate planning attorney, Corina Colan. The Law Office of Corina I. Colan / (909) 265-3315 / www.colanlegal.com







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