A shareholder buyout agreement is a binding contract among a private company’s owners that controls how shares change hands when a shareholder dies, becomes disabled, retires, divorces, gets fired, or wants to sell to an outsider. It fixes who can buy, at what price, and on what terms, so equity stays with people the remaining owners actually want as partners. Without one, a departing shareholder’s stock can end up with an estranged spouse, an estate’s heirs, or a competitor, and there is no built-in mechanism to stop it. The agreement sometimes lives inside corporate bylaws, but more often it is a standalone contract signed by every shareholder and by the corporation itself.
Four decisions do most of the work: which events trigger a purchase, how the shares get valued, who pays for the buyout, and how the transaction gets taxed. Getting any one of them wrong is expensive. Getting all four right is the point of the document.
Triggering Events
The agreement lists the events that activate the purchase provisions and, for each, says whether the sale is mandatory or optional. Vagueness here is what feeds litigation later, when emotions are already high.
- Death. The estate is typically required to sell the decedent’s shares back to the company or to the surviving shareholders, keeping voting rights out of the hands of heirs who don’t know the business.
- Disability. Usually defined as an inability to perform job duties for a consecutive period, often 90 to 180 days, at which point the remaining owners can buy out someone who can no longer contribute.
- Retirement or resignation. A voluntary departure at a specified age or by resignation, allowing an orderly liquidation of the person’s stake.
- Termination for cause. If a shareholder is fired for serious misconduct like fraud or breach of fiduciary duty, the agreement may force a compulsory buyout, sometimes at a discounted price.
- Divorce. In community property states, a former spouse can end up with half a shareholder’s stock in a settlement. Well-drafted agreements either require the divorcing shareholder to repurchase any shares awarded to a spouse, or they give the company and other shareholders the right to buy those shares before an ex-spouse ever appears on the ledger.
Each trigger should say plainly whether the sale must happen or may happen. A “may” clause dressed up as a “must,” or the reverse, is exactly the kind of ambiguity that produces a lawsuit.
How the Shares Get Valued
Valuation is where most buyout disputes start and end. The agreement needs to specify how the share price will be calculated when a trigger fires, because leaving it to negotiation at that point almost guarantees a fight. Four approaches are standard, and the right choice depends on what the business actually looks like.
Book Value
Book value takes assets minus liabilities from the most recent audited balance sheet. The number is clean and easy to verify, but it ignores earning power, brand value, and growth potential. It can work for asset-heavy businesses like a real estate holding company. It tends to shortchange the departing shareholder in a service firm or a tech company.
Fair Market Value
Fair market value uses an independent certified appraiser working from current market conditions and comparable transactions. It is the most accurate method and the most expensive. The appraiser may apply a minority discount, commonly 20% to 40%, if the departing shareholder’s stake is non-controlling; a controlling block, by contrast, may carry a premium above the proportional share of company value.
Earnings Multiples
An earnings-based formula ties price to profit-generating capacity, most often a multiple of EBITDA (Earnings Before Interest, Taxes, Depreciation, and Amortization). If the agreement locks in a multiple of four or five, the math is straightforward and avoids paying for an outside appraisal every time. The right multiple varies by industry and company size, with larger, more diversified businesses generally trading higher and businesses with heavy customer concentration or capital requirements trading lower.
Fixed Price
Some agreements let the board set a price each year at an annual meeting, recorded in the corporate minutes. It is the simplest option and the most dangerous when the board forgets to update it. A price set three years ago and never revisited can massively underpay or overpay depending on how the business has performed.
Tie-Breakers and Updates
When the agreement calls for independent appraisal, buyer and seller sometimes each hire their own appraiser and come back with wildly different numbers. A well-drafted agreement anticipates this: if the two appraisals differ by more than a specified percentage, a third appraiser is brought in, and the final value is either that appraiser’s conclusion or a weighted average of the two closest figures. Skipping this clause is one of the most common drafting mistakes and leaves the parties with no resolution short of a courtroom.
Whatever method you pick, schedule regular updates. If the company’s value has doubled since the last valuation, the departing shareholder gets cheated. If it has dropped, the remaining owners overpay. Annual reviews cost far less than the litigation that follows a stale price.
Controlling Who Ends Up on the Cap Table
Beyond the exit triggers, most agreements include three provisions that shape what can happen when a shareholder wants to sell or when the whole company is being sold.
Right of first refusal. A shareholder who receives a bona fide third-party offer must give the company written notice with the proposed buyer, price, and terms. The company then has a set window, commonly 15 to 45 days, to buy on identical terms. If the company passes, remaining shareholders typically get a secondary window. Only if everyone declines can the seller close with the outside buyer, and only within a defined period (often 60 to 90 days) and on terms no more favorable than what was offered internally. Miss that deadline and the process starts over.
Drag-along rights. When majority owners agree to sell the company, a drag-along clause forces minority holders to sell on the same terms. Without it, a single holdout can block a 100% acquisition.
Tag-along rights. The mirror image, protecting the minority. If majority owners find a buyer, minority holders can require the buyer to take their shares too, on the same terms and at the same price. Tag-along rights don’t force the minority to sell; they guarantee the option.
Funding the Buyout
A price nobody can pay is not really a price. The agreement should say where the money comes from, because a trigger can hit at any time and most companies don’t keep the cash sitting around.
Cash and Promissory Notes
Paying in a lump sum gives the departing shareholder immediate liquidity and can drain the company’s operating reserves at the worst possible moment. Many agreements split the difference: some cash upfront, the rest financed by a promissory note over three to five years. These notes must charge interest at or above the Applicable Federal Rate published monthly by the IRS.1Internal Revenue Service. Applicable Federal Rates If the rate falls below the AFR, the IRS treats the shortfall as a taxable gift or imputed income under federal below-market loan rules.2Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates The present value of the note’s payments is calculated using the AFR as the discount rate.3Office of the Law Revision Counsel. 26 USC 1274 – Determination of Issue Price in the Case of Certain Debt Instruments Issued for Property
Life Insurance
For the death trigger, life insurance is the most common funding source. The death benefit produces the exact lump sum needed to buy the shares without borrowing or liquidating assets. Proceeds received under a life insurance contract by reason of death are generally excluded from gross income.4Office of the Law Revision Counsel. 26 USC 101 – Certain Death Benefits Two structures dominate:
- Cross-purchase. Each shareholder owns a policy on every other shareholder. When one dies, the survivors collect the benefit and buy the deceased’s shares from the estate. They get a cost basis in the purchased shares equal to what they paid, which matters when they eventually sell.
- Entity-purchase (redemption). The corporation owns policies on each shareholder, collects the proceeds, and redeems the deceased owner’s shares. The logistics are simpler because the company needs one policy per shareholder rather than a policy between every pair of owners. But the surviving shareholders don’t get a stepped-up basis, which can produce a bigger tax bill later. And as explained below, the entity-purchase structure now carries a serious estate tax risk.
A hybrid or “wait-and-see” structure gives the company the first option to redeem. If it declines, the remaining shareholders buy individually as a cross-purchase. That flexibility lets the parties optimize the tax outcome based on facts at the time of death rather than a guess made years earlier.
Disability Insurance
Disability buy-out policies fund the purchase when a shareholder becomes permanently unable to work. These policies usually have a waiting period of several months before proceeds are disbursed, and the agreement’s payment schedule has to account for that gap. Temporary salary continuation or a delayed closing date can bridge it.
Tax Consequences
Tax treatment can move the outcome by hundreds of thousands of dollars. It is the single area where drafting mistakes cost the most.
Sale Treatment vs. Dividend Treatment
When the corporation itself redeems a shareholder’s stock, the IRS decides whether the payment is a sale of stock or a dividend distribution. Sale treatment taxes only the gain above the shareholder’s basis, at capital gains rates. Dividend treatment can tax the entire payment as ordinary income.
Federal law provides safe harbors that qualify a redemption for sale treatment. The two most relevant ones for buyout agreements are a complete termination of the shareholder’s interest and a substantially disproportionate redemption, in which the shareholder’s voting power afterward drops below 80% of what it was before and falls under 50% of total voting power.5Office of the Law Revision Counsel. 26 USC 302 – Distributions in Redemption of Stock Most buyouts of a departing owner are complete terminations and qualify. Family attribution rules can complicate this: shares owned by a spouse, children, or parents may be attributed to the departing shareholder, making the termination look incomplete.
Capital Gains Rates
When the buyout qualifies for sale treatment and the shareholder held the stock more than a year, the gain above basis is taxed at long-term capital gains rates. For 2026, those rates are 0% for single filers with taxable income up to $49,450 (or $98,900 for married couples filing jointly), 15% above those thresholds, and 20% once taxable income exceeds $545,500 for single filers or $613,700 for joint filers.6Tax Foundation. 2026 Tax Brackets and Federal Income Tax Rates High-income taxpayers may also owe the 3.8% net investment income tax on top.
The Connelly Problem for Entity-Purchase Agreements
Any owner using an entity-purchase agreement funded with life insurance needs to understand a 2024 Supreme Court decision. In Connelly v. United States, two brothers owned a corporation that held $3.5 million in life insurance on each of them. When one died, the company collected the proceeds and redeemed his shares for $3 million. The estate reported the shares at $3 million and paid about $300,000 in estate tax.
The IRS disagreed, arguing the company’s fair market value had to include the life insurance proceeds, which pushed the estate’s value to $5.3 million and generated roughly $1 million in additional tax. The Supreme Court sided with the IRS, holding that a corporation’s obligation to redeem shares at fair market value does not offset the value of the life insurance proceeds it holds.7Supreme Court of the United States. Connelly v. United States, No. 23-146 In plain terms: the insurance the company sets aside to buy your shares inflates the value of those shares for estate tax purposes. The more insurance you buy, the more tax the estate owes.
Cross-purchase arrangements, where individual shareholders own the policies, avoid the problem because the proceeds never sit on the company’s balance sheet. Switching from entity-purchase to cross-purchase, or adopting a hybrid structure, may be the single most valuable change many closely held businesses can make after Connelly. If you have an existing entity-purchase agreement funded by insurance, revisit it with a tax advisor.
Family-Owned Businesses
Family businesses face an extra hurdle. The IRS can disregard the buyout agreement’s price for estate and gift tax purposes unless the agreement meets three requirements: it must be a bona fide business arrangement, it must not be a device to transfer property to family members for less than adequate consideration, and its terms must be comparable to what unrelated parties would agree to at arm’s length.8Office of the Law Revision Counsel. 26 USC 2703 – Certain Rights and Restrictions Disregarded A suspiciously low price with no independent appraisal to support it is exactly what this statute targets. An independent valuation and a documented business rationale for the pricing formula protect the agreement from being thrown out at audit.
Getting the Agreement in Force
Before drafting begins, gather full legal names, tax identification numbers, and addresses for every shareholder, along with documentation of how many shares each person holds. Any physical stock certificates need to be located and reconciled against the stock ledger; discrepancies feed disputes later. Recent financial statements, audited if available, support whichever valuation method the agreement adopts. Existing articles of incorporation, bylaws, and prior shareholder agreements need to be reviewed so the new document doesn’t conflict with obligations already on the books.
In community property states, include a spousal consent form. It binds each shareholder’s spouse to the buyout terms and prevents a later claim that community property rights override the agreement’s transfer restrictions. Some agreements, including the Bandwidth buy-sell agreement filed with the SEC, require any shareholder who marries after signing to have the new spouse execute a separate acknowledgment and consent.9U.S. Securities and Exchange Commission. Bandwidth Inc. Buy-Sell Agreement
Every stock certificate issued by the company should carry a restrictive legend on its face, stating that the shares are subject to transfer restrictions under the buyout agreement. This is not a formality. In some jurisdictions, transfer restrictions are unenforceable against a third-party purchaser who bought without notice, and the legend supplies that notice. For uncertificated shares, the transfer agent’s records should reflect the restriction, and any written confirmation of ownership should reference it.
When a trigger eventually fires and the buyout closes, the departing shareholder surrenders their certificates to the corporate secretary for cancellation, the stock ledger is updated with the transfer date and new ownership percentages, and new certificates are issued to the buyers. Depending on the entity type and state, the company may also need to file updated organizational documents, with fees typically ranging from $25 to $60. Every document from the transaction, including board resolutions and any promissory notes, belongs in the company’s minute book.