Estate Planning for Business Owners: Succession, Valuation, and Probate Implications

Why Business Owners Are Your Most Complex Estate Planning Clients

Per the SBA, only about 30% of family businesses survive into the second generation and just 12% reach the third — and inadequate succession planning is consistently cited as a primary cause. Business owners are your most complex (and often most lucrative) estate planning clients for exactly that reason.

Their estate isn't a portfolio of financial accounts and real estate — it's one illiquid, hard-to-value asset that's simultaneously a source of family income, employment for others, and a legacy the owner wants to preserve. You'll coordinate with the business attorney, the CPA, the financial advisor, and often the business's key employees.

The stakes are high. According to the SBA, approximately 30% of family businesses survive into the second generation, and only 12% make it to the third.

While many factors contribute to this attrition, inadequate succession planning is consistently cited as a primary cause. A business owner who dies without a succession plan forces their family into a crisis: they must simultaneously grieve the loss, learn to operate or manage a business they may not understand, deal with employees and customers who are anxious about the company’s future, and navigate the probate and tax implications of a concentrated, illiquid estate.

Your role as the estate planning attorney is to prevent that crisis by helping the business owner create a succession plan that addresses ownership transfer, management succession, tax minimization, and liquidity needs. This article covers the core tools and strategies—business valuation, buy-sell agreements, key person insurance, family limited partnerships, GRATs, and the Section 6166 election—that every probate and estate planning attorney should master.

Business Valuation: Methods and Controversies

Accurate business valuation is the foundation of every business succession plan. The valuation determines the estate tax exposure, informs the pricing of buy-sell agreements, and drives the selection of appropriate transfer vehicles.

The AICPA business valuation standards recognize three primary approaches to valuation: the income approach, the market approach, and the asset-based approach. Most closely held businesses are valued using the income approach, which capitalizes the company’s expected future earnings or cash flows at a rate that reflects the risk of the investment.

The income approach typically involves calculating the company’s weighted average of normalized earnings or discretionary cash flow, selecting an appropriate capitalization rate (derived from comparable public companies with adjustments for size, industry risk, and company-specific risk), and dividing the earnings by the capitalization rate to arrive at an enterprise value. For example, a company with $500,000 in normalized earnings and a 20% capitalization rate would have an enterprise value of $2.5 million. Adjustments for excess or insufficient working capital, non-operating assets, and outstanding debt produce the equity value.

Valuation discounts are a critical and contentious area. Interests in closely held businesses are typically eligible for discounts for lack of marketability (DLOM) and lack of control (DLOC), which can reduce the taxable value by 20–40% in the aggregate.

The IRS has historically challenged aggressive discounting, particularly in the context of family limited partnerships created primarily for transfer tax purposes. Revenue Ruling 59-60 remains the foundational authority for valuation of closely held businesses, and practitioners should be intimately familiar with its factors. For a discussion of estate tax exposure and planning strategies, see our article on estate tax planning in multistate environments.

Buy-Sell Agreements: Structure and Funding

A buy-sell agreement is the cornerstone document of business succession planning. It establishes the terms under which an owner’s interest will be transferred upon a triggering event—death, disability, retirement, termination of employment, divorce, or bankruptcy—and ensures that the remaining owners and the departing owner’s estate have a clear, enforceable mechanism for the transfer. Without a buy-sell agreement, the death of an owner can result in the decedent’s interest passing to heirs who have no interest in or aptitude for operating the business, creating deadlock and potential litigation.

The three primary structures are the cross-purchase agreement, the entity redemption agreement, and the hybrid (or “wait-and-see”) agreement. In a cross-purchase, the surviving owners purchase the deceased owner’s interest, receiving a step-up in basis under IRC §1012.

In an entity redemption, the company itself purchases the interest, which is simpler to administer when there are multiple owners but does not provide a basis step-up to the survivors. The hybrid approach allows the entity to redeem first, with any remaining interest purchased by the surviving owners. The choice among these structures depends on the number of owners, the availability of funding, the relative tax positions of the owners, and state law considerations.

Funding is the critical practical question. A buy-sell agreement is only as good as the funding mechanism behind it.

Life insurance is the most common and efficient funding tool: each owner (in a cross-purchase) or the entity (in a redemption) purchases a life insurance policy on each other owner’s life, with death benefits equal to the purchase price of the owner’s interest. When an owner dies, the insurance proceeds provide the liquidity to complete the purchase without forcing a fire sale of business assets or burdening the surviving owners with debt. The buy-sell agreement should reference the insurance policies, specify how the purchase price is determined (fixed price, formula, or appraisal), and address the adjustment of insurance coverage as the business value changes over time.

Family Limited Partnerships and LLCs for Transfer Tax Planning

Family limited partnerships (FLPs) and family limited liability companies (FLLCs) have been staple vehicles for transferring business and investment assets to the next generation at discounted values. The basic strategy involves the business owner contributing assets to a partnership or LLC, retaining a general partner or manager interest (with control rights), and gifting or selling limited partnership or member interests to children or trusts for their benefit. Because the transferred interests carry restrictions on transferability and lack control rights, they qualify for valuation discounts that reduce the gift or estate tax value.

The IRS has challenged FLP and FLLC structures aggressively, particularly when the entity is formed shortly before the owner’s death, when the entity holds passive investment assets rather than an operating business, or when the owner retains the economic benefit of the contributed assets. The landmark Tax Court decision in Estate of Strangi (T.C.

Memo 2003-145) and the subsequent circuit court opinions illustrate the IRS’s willingness to disregard FLP structures under IRC §2036(a) when the decedent retained the enjoyment of the transferred property. The courts have also applied §2703 to disregard buy-sell restrictions that do not satisfy the statutory requirements.

Despite these challenges, properly structured FLPs and FLLCs remain effective planning tools when they are formed for legitimate business purposes (such as asset management, creditor protection, or business operations), when the owner does not retain excessive control or benefit from the transferred interests, and when the entity is operated as a genuine business with separate books, regular meetings, and arms-length transactions. The key for practitioners is to establish a clear non-tax business purpose, create the entity well in advance of any anticipated gift or transfer, and ensure strict compliance with entity formalities. For more on asset protection strategies, see our article on irrevocable trusts and asset protection.

Section 6166: Deferral of Estate Tax on Business Interests

Section 6166 of the Internal Revenue Code provides a critical liquidity tool for estates in which a closely held business interest comprises more than 35% of the adjusted gross estate. The election allows the estate to defer the payment of estate tax attributable to the business interest for up to 5 years (paying only interest during the deferral period) and then pay the deferred tax in up to 10 annual installments. The maximum deferral period is thus 14 years from the original due date of the estate tax return.

The interest rate on the deferred tax is favorable: the 2% rate under IRC §6601(j) applies to the estate tax on the first $1,750,000 (adjusted for inflation) of taxable value of the business interest above the applicable exclusion amount. The regular underpayment rate under IRC §6621 applies to the remainder. For large estates with significant business interests, the Section 6166 election can be the difference between preserving the business and being forced to sell it to pay estate taxes.

To qualify, the business must be an “interest in a closely held business” as defined in §6166(b), which includes a sole proprietorship, a partnership or LLC interest (if 20% or more of the total capital interest is included in the estate or the entity has 45 or fewer partners), or stock in a corporation (if 20% or more of the voting stock is included in the estate or the corporation has 45 or fewer shareholders). The election is made on a timely filed estate tax return (Form 706), and the IRS provides detailed instructions on the election process.

Practitioners should note that acceleration events—including disposition of more than 50% of the business interest, withdrawal of more than 50% of trade or business assets, or failure to make a timely installment payment—can trigger immediate payment of the entire deferred balance. For IRS guidance on estate tax matters, see the IRS estate tax FAQ.

GRATs and Other Advanced Transfer Vehicles

Grantor retained annuity trusts (GRATs) are among the most powerful tools for transferring closely held business interests at reduced transfer tax cost. In a GRAT, the business owner transfers business interests to a trust, retains the right to receive annuity payments for a specified term, and at the end of the term, the remaining trust assets pass to the beneficiaries (typically children or trusts for their benefit). The taxable gift is the value of the transferred property minus the present value of the retained annuity interest, calculated using the IRS §7520 rate.

The strategy is most effective when the transferred business interest appreciates at a rate exceeding the §7520 rate during the GRAT term. If so, the excess appreciation passes to the beneficiaries transfer-tax-free.

In a low-interest-rate environment, even a modest appreciation rate can result in significant tax-free wealth transfer. For a business with a current value of $5 million and an expected annual growth rate of 10%, a two-year “zeroed-out” GRAT (where the annuity is set to equal the gift tax value of the transferred property, resulting in a taxable gift near zero) can transfer $500,000–$1,000,000 to the next generation without using any gift or estate tax exemption.

Other advanced vehicles include intentionally defective grantor trusts (IDGTs), qualified personal residence trusts (QPRTs) for the business owner’s personal residence, and charitable lead trusts for philanthropically inclined clients. The selection of the appropriate vehicle depends on the client’s objectives, the nature and expected growth rate of the business interest, the client’s remaining gift and estate tax exemption, and the client’s willingness to relinquish control and economic benefit during the trust term.

Coordination with the CPA on income tax implications is essential, as grantor trust status affects the income tax treatment of the annuity payments and the trust’s income during the term. For estate tax threshold analysis across different states, see our article on creditor claims in probate and use our estate tax calculator.

Coordinating Business and Estate Planning Documents

The most carefully crafted estate plan will fail if it is not coordinated with the business’s governing documents. The operating agreement, partnership agreement, or corporate bylaws must be consistent with the estate plan’s succession provisions. A will that bequeaths a 50% LLC interest to the decedent’s spouse is ineffective if the operating agreement gives the other members the right to purchase the interest at book value or to block the spouse’s admission as a member.

Review and, if necessary, amend the business’s governing documents to align with the estate plan. Key provisions to coordinate include: transfer restrictions (ensuring the estate plan’s intended transfers are permitted under the operating agreement), management succession (who will manage the business if the decedent was the sole manager or managing member), distribution rights (whether the estate or trust will receive pro rata distributions during the administration period), and dissolution provisions (whether the death of a member triggers dissolution or a mandatory buyout). These documents should be reviewed together as an integrated system, not in isolation.

Finally, ensure that the business’s operational continuity is addressed. Identify key employees who will manage day-to-day operations if the owner becomes incapacitated or dies. Execute durable powers of attorney and advance health care directives that specifically authorize the agent to manage the business on the owner’s behalf during incapacity.

Establish a crisis communication plan for employees, customers, and vendors. The estate plan should be a living document that evolves with the business—not a static document drafted at formation and forgotten. For guidance on the probate process that will ultimately administer these interests, see our article on probate vs. trust administration.

Key Person Insurance and Liquidity Planning

Liquidity is the Achilles’ heel of business owner estate planning. A $10 million estate consisting of a $9 million business interest and $1 million in liquid assets presents a fundamentally different challenge than a $10 million estate of diversified securities. The estate tax on a $10 million estate (after the current $13.61 million exemption, if the exemption sunsets as scheduled) could be $2–4 million, and the illiquid business interest cannot be easily converted to cash without potentially destroying the business’s value.

Key person insurance addresses this liquidity gap. A life insurance policy owned by an irrevocable life insurance trust (ILIT) on the business owner’s life provides estate-tax-free liquidity that can be used to pay estate taxes, fund buy-sell obligations, equalize distributions among heirs (where some heirs receive the business and others receive insurance proceeds), and provide income replacement for the surviving family. The policy should be owned by the ILIT rather than the insured to avoid inclusion in the taxable estate under IRC §2042. The three-year lookback rule under IRC §2035 means that policies transferred to an ILIT within three years of death are pulled back into the estate, so planning should begin well in advance.

Work with the client’s insurance advisor to determine the appropriate coverage amount, which should account for the estimated estate tax liability, the buy-sell purchase price, anticipated administrative expenses, and any gap between the business’s liquid assets and its near-term obligations. Second-to-die (survivorship) policies can be cost-effective for married couples, as the death benefit is paid only when the second spouse dies—which is when the estate tax is typically due (assuming the unlimited marital deduction was used at the first death). For a broader discussion of estate tax calculation, use our estate tax calculator to model scenarios for your clients.