Buy-Sell Agreements for Business Owners: The Complete Guide

Without a buy-sell agreement, a co-owner's death or disability can force you into business with their spouse, their estate, or a court-appointed administrator — none of whom you chose as partners. A properly funded buy-sell agreement prevents that entirely.

What is a buy-sell agreement?

A buy-sell agreement (also called a "business continuation agreement") is a legally binding contract between co-owners that answers three questions in advance:

1. When can an owner be bought out? (triggering events)
2. At what price? (valuation method)
3. With whose money? (funding mechanism)

Every business with more than one owner needs one. Most don't have one — or have one that's years out of date and dramatically underfunded. Getting this right is one of the highest-ROI planning moves a business owner can make.

The five triggering events

A well-drafted buy-sell agreement covers each of these:

Cross-purchase vs. entity redemption — the structural choice that drives your taxes

There are two main buy-sell structures, and the tax consequences differ significantly:

Cross-purchase agreement

Each partner agrees to buy the other's interest directly if a triggering event occurs. If there are two partners, Partner A holds an insurance policy on Partner B, and vice versa. When Partner B dies:

• Partner A collects the death benefit income-tax-free under IRC § 101(a)¹
• Partner A uses those proceeds to purchase Partner B's business interest from the estate
• Partner A's new basis in that interest equals the purchase price — the full value paid²

That basis step-up matters enormously at exit. If the business is later sold, Partner A's gain is calculated from the stepped-up purchase price, not from the original founding basis.

Main drawback: With three or more partners, cross-purchase requires N × (N − 1) insurance policies. Three partners means six policies; four means twelve. This gets expensive and administratively complex. The solution is often a partnership or LLC "insurance pool" where a separate entity holds all policies.

Entity redemption agreement

The company itself buys back the departing owner's interest. One policy per owner, held by the company — simpler with three or more partners.

The tax trade-off:

• No basis step-up for surviving shareholders. Their cost basis in the company doesn't change when the company buys out a co-owner.
• C-corp risk: dividend treatment. In C-corporations, a redemption must satisfy one of the tests under IRC § 302(b) to be treated as a capital gain sale rather than a dividend.³ Failure to satisfy these tests means the full redemption price is taxed as ordinary income. S-corps, LLCs, and partnerships don't face this specific risk (different rules apply).
• The company's life insurance proceeds are also income-tax-free under § 101(a), but the company — not the surviving shareholders — receives them.

Tax comparison: the basis step-up difference in dollars

Consider two equal partners each with a $50K founding basis in a $5M business. One partner dies. The company is later sold for $6M.

Illustrative example. State taxes, depreciation recapture, and other factors affect actual outcome. Numbers assume S-corp or LLC (no §302 dividend risk). A tax advisor should model your specific scenario.

Funding the buyout

A buy-sell agreement with no funding is just a promise. There are four funding approaches:

1. Life insurance (death trigger) — most common

Permanent or term life insurance is the default because it delivers exactly the right amount at exactly the right time. Death benefit proceeds are income-tax-free to the beneficiary under IRC § 101(a).¹ The policy face amount should match each owner's buyout value — which means updating coverage as the business grows.

Premium payment deductibility: Life insurance premiums are generally not deductible as a business expense if the company is the beneficiary (IRC § 264).⁴ The after-tax cost is real, but the benefit — immediate liquidity at death — typically justifies it for most businesses.

2. Disability buyout insurance (disability trigger)

Standard disability income insurance replaces the disabled owner's salary. A disability buyout policy is different: it funds the purchase of the disabled owner's business interest. Typically:

• Waiting period: 12–24 months of continuous disability before the buyout obligation triggers
• Payout: Either a lump sum (for smaller buyout amounts) or monthly installments over 3–5 years
• Disability definition: Usually "own-occupation" — inability to perform the material duties of the owner's specific role
• Premiums: Generally lower than life insurance for the same benefit amount, but policies can be expensive for older business owners

Disability is statistically more likely than death before age 65, yet far fewer buy-sell agreements have disability funding. This gap leaves partners exposed.

3. Installment note (no external funding)

The buying party promises to pay the buyout price over time — often 5–10 years with interest. No insurance required. The risk: what if the business has a bad year and can't make payments? An installment note relies entirely on future business cash flow, which may be stressed precisely when a buyout occurs.

4. Sinking fund

Each year, the company sets aside cash in a dedicated account against a future buyout. Conservative and liquid, but slow to fund. Few businesses have the discipline or cash flow to make this work before an event occurs.

Setting the purchase price

How you value the business matters as much as the structure. Four approaches:

Fixed price

Simple and cheap: agree on a dollar amount now. The fatal flaw is obsolescence — a price set three years ago when the business had $1M revenue is wrong now at $4M. Requires annual amendment to stay relevant.

Formula-based valuation

Common formulas: a multiple of EBITDA, a multiple of revenue, or a multiple of book value. More reliable than a fixed price because it moves with the business. Must be defined precisely — "4× trailing twelve-month EBITDA" is unambiguous; "fair value" is not.

Agreed appraisal at the triggering event

Each side hires an appraiser; a third appraiser is appointed if the two disagree. Accurate but slow, expensive, and adversarial at the worst possible moment (a partner just died).

Annual appraisal with escalator

A certified valuation professional (CVA or ABV) appraises the business annually. The agreed value updates each year. More expensive than a formula but more accurate, particularly for businesses that don't fit simple multiples.

Common mistakes that expose business owners

• Letting the agreement go stale. A business worth $800K when the agreement was signed is worth $4M today. The insurance coverage and buyout price haven't been updated. Result: the heirs are owed $4M; the policy pays $800K; the surviving partner owes the difference out of pocket — or the business assets are liquidated.
• No disability trigger. The most common omission. Death gets attention because it's certain; disability is uncertain and awkward to plan for. But a totally disabled partner who remains a 50% owner creates immediate operational and legal problems.
• Using life insurance directly in a cross-purchase without considering the multiple-policy problem. With 4+ partners, N × (N − 1) individual policies becomes unworkable. The solution (a separate insurance LLC or partnership) adds complexity but is usually the right answer.
• Ignoring §302 in a C-corp redemption. A straight entity redemption in a C-corp without confirming it qualifies as a "complete termination" under § 302(b)(3) or another safe harbor risks taxing the entire redemption as a dividend at ordinary income rates.
• No divorce protection. Without an explicit restriction on transfers (including transfers to a spouse pursuant to a divorce decree), a family court could order a co-owner's business interest transferred as marital property. Buy-sell agreements should include first-right-of-purchase provisions triggered by divorce.
• Waiting until someone is sick. Once a health event occurs, the partner in question may be uninsurable. Life and disability buyout policies must be underwritten before health problems arise.

Solo owner considerations

If you have no co-owners, a traditional buy-sell agreement doesn't apply — but the underlying planning need is identical: what happens to the business and your family if you die or become disabled?

The equivalent planning for solo owners typically includes:

• Key-person life insurance: The business is the beneficiary. Proceeds fund operations, debt repayment, or an orderly wind-down while heirs decide what to do with the business.
• Succession plan document: Identifies who takes over operations, who has authority to make financial decisions, and whether the business will be sold, wound down, or transferred to a family member.
• Management buyout agreement: If you have a key employee who could run and eventually own the business, a letter of intent or option agreement can formalize that path — effectively a buy-sell between owner and employee.

The role of a fee-only financial advisor

Buy-sell agreements sit at the intersection of legal, tax, insurance, and financial planning. You'll need:

• A business attorney to draft the agreement itself (not something to DIY with templates)
• A CPA to model the tax consequences of each structure — particularly the basis step-up difference and any S-corp or C-corp specific issues
• An insurance broker to design and price the life and disability policies
• A fee-only financial advisor to coordinate all three, model the funding adequacy against your actual business value, and make sure the buy-sell integrates with your broader estate plan, retirement strategy, and business exit planning

Fee-only advisors don't earn commissions on insurance — which means their recommendation on how much to buy and how to structure it isn't influenced by what pays them the most.

Sources

1. IRC § 101(a) — Exclusion of life insurance death benefits from gross income, via LII/Cornell Law School. Life insurance proceeds paid by reason of death are excluded from the gross income of the beneficiary.
2. IRC § 1014 — Basis of property acquired from a decedent, via LII/Cornell Law School. Property acquired from a decedent receives a stepped-up (or stepped-down) basis equal to fair market value at the date of death. Applies to purchased interest in cross-purchase arrangements where the buying partner acquires the interest from the estate.
3. IRC § 302 — Distributions in redemption of stock, via LII/Cornell Law School. Redemptions treated as exchanges (capital gain) must satisfy one of the § 302(b) safe harbors: substantially disproportionate, complete termination, not essentially equivalent to a dividend, or partial liquidation.
4. IRC § 264 — Certain amounts paid in connection with insurance contracts, via LII/Cornell Law School. Prohibits deduction of premiums on life insurance if the taxpayer is directly or indirectly a beneficiary under the policy.
5. IRC § 2703 — Certain rights and restrictions disregarded for estate tax purposes, via LII/Cornell Law School. Buy-sell agreements used to value an estate interest must meet a three-part test: bona fide business arrangement, not a device to transfer for less than adequate consideration, and comparable to arm's-length arrangements. OBBBA (July 2025) set the 2026 estate/gift exemption at $15M, reducing but not eliminating the relevance of § 2703 for large business estates.

IRC sections cited are current statutory law. 2026 estate tax exemption ($15M) reflects the One Big Beautiful Bill Act (OBBBA, July 2025). Insurance pricing and disability waiting periods vary by insurer and state. This content is for informational purposes only. Values current as of April 2026.