Liquidity Planning for Family Business Succession Buyouts

Liquidity planning for family business succession lines up cash for a buyout, fair shares for heirs and estate tax in advance, so selling stays a choice.

Our guide to family business succession planning beyond the will covers who gets the shares. This one covers where the money comes from.

What does liquidity planning for family business succession need to cover?

A family business is usually the owner's largest and least liquid asset. Succession puts three claims on cash at roughly the same time.

• The buyout. When an owner dies, becomes disabled or retires, a buy-sell agreement usually requires the other owners, the company or a family member to buy that interest. The agreement sets the price. It does not produce the cash.
• Equalization. If one child runs the business and two do not, the operating child often receives the company and the others receive something of similar value. That something has to exist.
• Estate tax. The federal estate tax return is due within 9 months after the date of death. For the 2026 tax year, the basic exclusion amount is $15,000,000 per person, up from $13,990,000 in 2025, so many family businesses owe no federal estate tax. Larger estates can, and some states tax estates at far lower levels.

When none of this is funded ahead of time, families sell equipment, take on expensive debt, or sell to an outside buyer they never wanted.

A buy-sell agreement sets the price. Only a funding plan produces the cash.

Cross-purchase agreement

A buy-sell agreement in which the owners buy each other's shares personally.

Entity redemption agreement

A buy-sell agreement in which the company buys back a departing owner's shares.

Equalization

Giving heirs who do not receive the business other assets of similar value.

Which funding methods can pay for a buyout without selling the business?

Most plans use more than one method, such as insurance for a death and an installment note for a retirement.

Installment notes: a buyout paid over time

In an installment sale, the buyer pays part of the price at closing and the rest under a promissory note. Under the installment method, the seller generally reports gain as payments arrive rather than all in the year of sale. That is cleaner for a sale of shares. In a sale of business assets, depreciation recapture is taxed in the year of sale, inventory does not qualify, and a sale of depreciable property between related persons can lose installment treatment entirely.

Three rules matter in a family deal. The note should carry interest at least equal to the applicable federal rate the IRS publishes monthly, or it can create gift and imputed interest problems. If the family buyer resells within 2 years and before the note is paid, the original seller can be treated as receiving the resale proceeds right away. And Section 453A can add an interest charge on the deferred tax, but only when the sales price exceeds $150,000 and the face amount of obligations that arose during the year and remain outstanding at year end exceeds $5,000,000.

The tradeoff is risk. A note is only as good as the business paying it. If most of your net worth is the company, the issues in asset rich, cash poor retirement income planning apply directly.

Redemptions: when the company buys the shares

Section 302 treats a redemption as a sale only if it passes one of several tests; otherwise it can be taxed as a dividend. Family attribution rules count shares owned by a spouse, children, grandchildren and parents as owned by the seller, so a parent who sells back every share may still be treated as owning the children's shares.

A complete exit has a path. Family attribution can be waived if, right after the redemption, the seller has no interest in the company (including as an officer, director or employee) other than as a creditor, acquires none within 10 years other than by inheritance, and files an agreement with the IRS. Stock moved between the seller and close family in the 10 years before the redemption can also defeat the waiver unless tax avoidance was not a principal purpose, so lifetime gifts and a later redemption have to be planned together. A parent who wants to stay on the board or the payroll does not qualify. S corporations add their own rules, so raise this with your CPA early.

Section 303 helps estates. The company can redeem stock included in a decedent's estate and have it treated as a sale, up to the amount of death taxes plus funeral and administration expenses, if the stock is worth more than 35 percent of the gross estate after deductions for expenses, debts and losses. It applies only to the extent the shareholder whose stock is redeemed actually bears those costs.

Insurance-funded buy-sell agreements

Life insurance is one way to fund the death trigger. Each owner's life is insured, and the death benefit supplies the purchase price when it is needed. Under Section 101(a), amounts paid under a life insurance contract by reason of the insured's death are generally excluded from gross income. There are conditions: a policy transferred for value can lose part of the exclusion, and a policy a business owns on an employee's life keeps the full exclusion only if written notice and consent are completed before it is issued and a statutory exception applies, such as proceeds used to buy the insured's interest from family or the estate.

Who owns the policy matters. In Connelly v. United States (2024), the Supreme Court held that a corporation's obligation to redeem a deceased owner's shares did not offset the insurance proceeds the company received to fund it. The proceeds raised the company's value, and with it the estate tax value of the shares. The Court pointed to a cross-purchase agreement as one alternative. That structure has its own costs, such as more policies with several owners.

A death benefit funds the death trigger. Retirement, disability and a voluntary exit need a separately evaluated source, so insurance is usually one layer of a plan.

How a buy-sell agreement is structured can change the estate tax value of the very shares it was written to buy.

How does Section 6166 work with a family buyout?

Section 6166 addresses the estate tax itself. If a closely held business interest in the gross estate exceeds 35 percent of the adjusted gross estate, the executor may elect a 5-year deferral followed by a 10-year installment payment of the tax attributable to that interest. Corporate stock qualifies if the corporation carries on a trade or business and 20 percent or more in value of the voting stock is in the gross estate, or the corporation had 45 or fewer shareholders. Value tied to passive assets does not count toward the test, which matters if the company has been building a large investment reserve.

The deferral carries interest, and the estate pays it annually during the first 5 years, so it still needs cash from year one. Under Section 6601(j), a portion of the deferred tax set by an inflation-adjusted formula carries 2 percent, and the rest carries 45 percent of the regular underpayment rate.

The trap is acceleration. Sales, distributions and other dispositions of the business interest, plus money withdrawn from the business, are added together. Once the total reaches 50 percent of the value of the interest, the unpaid tax becomes due on notice and demand. Transfers to heirs under the will or the decedent's trust do not count. A Section 303 redemption is carved out if the estate pays at least that much estate tax by the next installment date or within one year, whichever is earlier.

A buyout that moves half the estate's business interest, even in pieces, can end the deferral that was supposed to give the estate time to pay.

That is why the estate tax plan and the buy-sell agreement have to be designed together.

How do you equalize heirs without selling the business?

Equal shares are not always fair shares when one child runs the company. Three questions decide whether equalizing works.

1. What is the business worth? Equalization runs on a valuation. Under Section 2703, a buy-sell price is respected for estate tax only if the agreement is a bona fide business arrangement, is not a device to pass the business to family for less than full value, and has terms comparable to an arm's-length deal.
2. What will the other heirs receive? Real estate, investment accounts, retirement accounts, a note from the operating child or insurance proceeds can all serve. An inherited pretax retirement account carries income tax the heirs will owe, so equal dollars may not be equal after tax.
3. When does it happen? Part of the transfer can move during life. For the 2026 tax year, the annual gift tax exclusion is $19,000 per recipient. Gradual gifts to the successor, plus a note for the balance, can shrink what must be funded at death. Two cautions: the exclusion covers only present interests, and gifted shares keep the donor's income tax basis, while inherited shares generally take a basis equal to value at death.

An operating child buying out siblings with a note keeps the business intact but makes the siblings creditors. Our family business estate planning questions cover the conversations that come first.

Equal on paper and equal after tax are two different numbers.

How do you build a liquidity plan for a family business?

1. Map the cash needs. For each trigger (death, disability, retirement, divorce, exit), estimate the buyout, equalization and estate tax.
2. Refresh the valuation. Name a method, a provider and a refresh schedule in the buy-sell agreement.
3. Match a funding source to each trigger. Write down which source covers which event.
4. Test the tax interactions. Redemption treatment, Section 6166 acceleration and the Connelly valuation effect.
5. Put the professionals in one room. Your attorney drafts, your CPA models the tax, and the funding has to fit both. Here is how to coordinate your CPA, advisor and attorney.

Anchor provides tax strategy, financial planning and coordination, not legal advice or tax filing. Keep your own attorney and CPA for drafting and filing. Some figures above, such as the exclusion amounts, are adjusted annually; others are fixed in the statute. Confirm the current amounts and rules before acting.

Frequently asked questions

What is liquidity planning in family business succession?

It is the part of a succession plan that decides where the cash comes from for a buyout, for heirs who do not receive the business, and for estate tax, before a death, disability or retirement forces the question.

Can a buy-sell agreement be funded without life insurance?

Yes. Families also use company reserves, installment notes, company redemptions and bank debt. A death benefit funds the death trigger, so plans that use it usually need another source for retirement, disability or a voluntary exit.

Does Section 6166 pay for the buyout?

No. It lets a qualifying estate pay the estate tax on a closely held business over time. Sales and withdrawals that add up to 50 percent or more of the business interest can end the deferral, so plan the two together.

Is a family company redemption taxed as a sale or a dividend?

It depends on whether it meets a Section 302 test after counting shares held by close family. A complete exit with a filed waiver, or a Section 303 redemption to pay death taxes, can qualify as a sale. Have your CPA model it before signing.

Sources

1. 26 U.S. Code § 6166 (Legal Information Institute, Cornell Law School): eligibility, passive assets, deferral, annual interest and the 50 percent acceleration rule.
2. 26 U.S. Code § 6075 (Legal Information Institute, Cornell Law School): the 9-month estate tax return deadline.
3. IRS tax inflation adjustments for tax year 2026: the 2026 basic exclusion amount and annual gift tax exclusion.
4. 26 U.S. Code § 453 (Legal Information Institute, Cornell Law School): the installment method, recapture, inventory and related-party rules.
5. 26 U.S. Code § 453A - Special rules for nondealers: the interest charge thresholds.
6. IRS, Applicable Federal Rates: the monthly published rates.
7. 26 U.S. Code § 302 (Legal Information Institute, Cornell Law School): redemption tests and the family attribution waiver and its limits.
8. 26 U.S. Code § 318 (Legal Information Institute, Cornell Law School): family attribution.
9. 26 U.S. Code § 303 (Legal Information Institute, Cornell Law School): redemptions to pay death taxes.
10. 26 U.S. Code § 6601 (Legal Information Institute, Cornell Law School): interest on tax deferred under Section 6166.
11. 26 U.S. Code § 101 (Legal Information Institute, Cornell Law School): the death benefit exclusion and its conditions.
12. 26 U.S. Code § 2503 (Legal Information Institute, Cornell Law School): the annual exclusion applies to gifts other than future interests.
13. 26 U.S. Code § 1015 (Legal Information Institute, Cornell Law School) and § 1014: basis of gifted and inherited property.
14. 26 U.S. Code § 2703 (Legal Information Institute, Cornell Law School): when a buy-sell price is respected for valuation.
15. Connelly v. United States, No. 23-146 (2024) (Legal Information Institute, Cornell Law School): insurance proceeds and a corporate redemption obligation in estate tax valuation.