Every multi-owner small business needs a buy-sell agreement. Most do not have one until a triggering event, a partner's death, disability, divorce, or departure, forces the question. At that point, the agreement cannot be written retroactively; the owners (or their estates) are left with the default rules of whatever state the business is formed in, which are rarely favorable to anyone involved.
A buy-sell agreement is the contract between owners that governs what happens to each owner's share when specific events occur. Done well, it produces predictability, fair treatment, and a clean financial mechanism for transferring ownership. Done poorly, or not done at all, it leads to the most expensive and relationship-damaging disputes in small-business law.
The Five D's: What the Agreement Must Cover
A complete buy-sell agreement addresses five categories of triggering events. Missing any one leaves a gap that a future dispute will exploit.
| Trigger | What It Means | Typical Mechanism |
|---|---|---|
| Death | An owner dies | Life insurance funds the buyout at predetermined value |
| Disability | An owner cannot continue to work | Disability insurance funds buyout; definition of disability must be precise |
| Divorce | An owner's divorce assigns business shares to the ex-spouse | Right of first refusal forces the ex-spouse to sell to remaining owners |
| Dispute | Owners cannot continue to work together | Valuation method + required buyout by one party, often structured as a shotgun clause |
| Departure | An owner voluntarily leaves | Valuation method + payment structure; often tiered by reason for departure |
The Valuation Method
The single most important clause in a buy-sell agreement is how the business will be valued when a trigger occurs. Four methods are commonly used; each has tradeoffs.
Fixed Price, Updated Annually
Owners agree on a price each year. Simple, but failure to update creates either windfall or shortfall when a trigger occurs. Requires disciplined annual review — which most owners skip after year two.
Formula-Based Valuation
Price determined by a formula (e.g., 4x trailing twelve-month EBITDA, or book value plus 1x revenue). Eliminates the update problem but may not reflect the business's actual value if market multiples drift.
Appraisal at Trigger Event
A qualified appraiser determines value when the event occurs. Most accurate but slowest and most expensive — the appraisal can take 60–90 days and cost $5K–$20K, and disagreements about the appraiser or methodology can trigger litigation.
Hybrid Approach
Formula-based with a 'floor' from the annual-fixed-price and a 'ceiling' from a third-party appraisal if either party requests one. More complex to draft but tends to produce the best real-world outcomes.
Funding the Buyout
A buy-sell agreement without a funding mechanism is an agreement without teeth. The surviving partners or the business itself must actually have the cash to execute the buyout.
Life insurance is the most common and cost-effective funding for death-triggered buyouts. Each owner is insured for an amount equal to their share of the business value; the policy proceeds fund the buyout of the deceased owner's estate. Premiums are paid by the business or by the owners (depending on structure), and the cost is typically modest relative to the protection provided. For disability-triggered buyouts, disability buy-out insurance (DBO) serves the same purpose.
Without insurance funding, death or disability triggers create a forced situation: the surviving owners must either borrow to fund the buyout, sell the business, or negotiate an extended payment structure with the departing owner's estate. None of these outcomes is as good as having the insurance in place.
Cross-Purchase vs. Entity-Purchase Structure
The two structural options for buy-sell agreements have different tax and operational implications.
Cross-Purchase Structure
- Each owner personally owns policies on the others
- Buyout is between the individual owners
- Surviving owner gets basis step-up in acquired shares
- Complexity scales with owner count (N owners need N×(N−1) policies)
- Better tax outcome for future sale of the business
Entity-Purchase (Redemption) Structure
- Business entity owns policies on each owner
- Business buys back the deceased owner's shares
- Simpler administration — one policy per owner, regardless of count
- No basis step-up for surviving owners
- Higher tax cost on eventual sale for surviving owners
For businesses with 2–3 owners, cross-purchase structures often win on tax grounds. For businesses with more owners, entity-purchase structures are usually operationally simpler despite the tax cost. Hybrid structures (partial cross-purchase, partial entity-purchase) handle some situations but add complexity.
Common Mistakes
Buy-sell agreements fail in predictable ways. The errors below are the most frequent sources of dispute.
- Valuation formula that has not been updated for years — produces a number that is dramatically wrong at trigger
- No funding mechanism — agreement requires a buyout that the surviving parties cannot actually afford
- Disability definition is vague — triggers disputes about whether the threshold has been met
- No right of first refusal for voluntary departures — owner can sell to an outside party the remaining owners don't want
- Divorce trigger not addressed — ex-spouse becomes an involuntary owner
- No provisions for dispute resolution between surviving owners — disagreement paralyzes the business
- Agreement hasn't been updated for current owner composition — reflects structure that no longer exists
- No integration with estate planning — business value creates unexpected estate tax issues
The buy-sell agreement is the most important legal document most multi-owner small businesses ever create, and the one most consistently neglected. It is the document that prevents a successful partnership from becoming an unsuccessful lawsuit when one of the predictable life events eventually occurs. The cost to draft a strong buy-sell agreement is typically $5K–$15K; the cost of not having one, when a trigger arrives, is routinely 10x that.
Review your buy-sell agreement every three years — whether or not anything has changed. Ownership percentages, business value, and life circumstances all drift over time, and a buy-sell that reflected the business accurately at signing often misrepresents it meaningfully within five years. The review costs little; discovering a gap at a trigger event costs a great deal.
Frequently Asked Questions
At or shortly after formation of a multi-owner business. Waiting until the business has meaningful value makes the drafting more complex (existing ownership has to be valued) and often surfaces disagreements that would have been simple at formation. The best time is at formation; the second best time is now.
Technically no, but the functional equivalent — a succession or estate plan that addresses what happens to the business if you die or become disabled — is essential. Sole owners often overlook this because there is no partner to negotiate with, but the business's continuity depends on it as much as a partnership's does.
This is itself a signal that the partnership needs more upfront work. If owners can't agree in principle on how the business is valued, they will certainly not agree at a trigger event. The right response is to engage an advisor (often a CFO or valuation professional) to structure the conversation and propose a method, rather than letting the disagreement persist unresolved.
Typically each owner's share of the business's current value, updated at least every three years. A business worth $3M with three equal partners should have roughly $1M of life insurance coverage per partner. Disability buyout coverage is structured similarly. Premium cost is usually modest; the coverage provides the financial mechanism that makes the agreement actually executable.
Sources
- SMAART Company. Small Business Buy-Sell Agreement Frameworks, 2026.
- American Bar Association. Business Law Section — Buy-Sell Agreements, 2025. americanbar.org
- American Institute of Certified Public Accountants. Buy-Sell Agreement Structures, 2026. aicpa.org
- Society of Financial Service Professionals. Business Continuation Planning, 2025. financialpro.org
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