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Buy-Sell Agreements Explained: What Happens When a Co-Owner Leaves

Most multi-owner businesses have no written plan for what happens when a partner dies, becomes disabled, gets divorced, or just wants out. A buy-sell agreement is that plan — and without one, the default rules are usually worse than anything you'd have chosen.

6 min read · Published August 2026

Key Takeaways

  • A buy-sell agreement is a contract among co-owners that decides, in advance, what happens to an owner's stake when they die, become disabled, divorce, retire, or want to sell.
  • Without one, state default law or a messy negotiation with an estranged partner (or their heirs) decides for you — usually worse than anything the owners would have agreed to themselves.
  • The two main structures are cross-purchase (remaining owners buy the departing owner's stake directly) and entity redemption (the business itself buys it back).
  • Life insurance is the most common way to fund the buyout — it turns a six- or seven-figure obligation into a tax-free check that arrives exactly when it's needed, instead of a scramble for cash or a bank loan.
  • The trigger events, the valuation method, and the funding mechanism all need to be decided while every owner is healthy and getting along — not after one of those events happens.

The plan you need before you need it

Most multi-owner businesses form with a handshake and an operating agreement focused on how to run day-to-day operations — voting, distributions, management roles. Far fewer address the harder question: what happens when one owner is no longer part of the business, whether by choice or not. A buy-sell agreement is the contract that answers that question in advance, while every owner is healthy, aligned, and has no personal stake in one particular outcome.

The best time to agree on the exit terms is before anyone is trying to exit.

What happens without one

Without a buy-sell agreement, state default partnership or LLC law governs what happens when an owner leaves — and those defaults are rarely what any of the owners would have chosen. A few common outcomes:

  • A deceased owner’s shares pass to their estate, potentially leaving the surviving owners in business with a spouse or adult child who has no interest in or ability to run the company.
  • A divorcing owner’s ex-spouse may be entitled to a portion of the business interest as marital property, putting an unrelated party at the ownership table.
  • Without a pre-agreed valuation method, a departing owner and the remaining ones can end up in an expensive, adversarial appraisal fight — often the worst possible time to be negotiating, since it’s usually triggered by exactly the kind of event (death, disability, a falling-out) that makes cooperation hardest.

The two structures

A buy-sell agreement specifies who buys the departing owner’s stake. There are two main approaches:

StructureWho buysBest fit
Cross-purchaseRemaining owners buy directly, in proportion to their existing stakesTwo or three owners — gives buyers a stepped-up basis in what they acquire
Entity redemptionThe business itself buys back the departing owner's sharesMore owners — one policy per owner instead of a cross-owned web
HybridEntity has first right to redeem; owners step in if it doesn'tCommon middle ground that keeps flexibility without the full cross-purchase complexity

Funding the buyout

An agreement without a funding mechanism is just a promise — the obligation to buy is real, but the cash to do it often isn’t sitting in the business account when a trigger event happens. Term life insurance is the standard solution for the death trigger: each owner is insured for roughly their share of the buyout obligation, and the payout arrives income-tax-free at exactly the moment it’s needed. Disability buyout insurance covers the same gap for permanent disability — a trigger that’s statistically far more likely than death for owners still working age, and one that’s easy to overlook when planning focuses only on the worst-case scenario.

An unfunded agreement is a plan with no way to pay for it

It’s common for owners to sign a buy-sell agreement and never revisit the funding side — leaving the business to figure out financing (a loan, an installment payout, draining cash reserves) at the exact moment it can least afford the distraction. Reviewing the funding alongside the agreement itself, not as an afterthought, is what actually makes the plan work when it’s needed.

What else the agreement needs to nail down

  • Triggers — death, disability, divorce, retirement, voluntary departure, and deadlock each deserve their own terms, since the right price and timeline can differ by trigger.
  • Valuation method — a fixed price updated annually, a formula tied to revenue or EBITDA, or an independent appraisal at the time of the event. Whichever you choose, specify it precisely enough that it can’t become its own dispute.
  • Payment terms — lump sum (typically funded by insurance for the death trigger) or an installment note over several years for triggers insurance doesn’t cover, like voluntary departure.

See what it costs to fund your buyout

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Frequently asked

Questions owners actually ask

What actually triggers a buy-sell agreement?
The common triggers are death, permanent disability, divorce (an ex-spouse ending up with an ownership stake is a real risk without one), retirement, voluntary departure, and sometimes a deadlock between owners who can no longer agree on how to run the business. A well-drafted agreement addresses each of these separately, since the right price, timeline, and funding source can differ by trigger.
Cross-purchase or entity redemption — which is better?
Cross-purchase (the remaining owners personally buy the departing owner's shares) gives the buyers a stepped-up basis in what they acquire, which matters if they sell later — but gets complicated with more than two or three owners, since each owner needs a policy on every other owner. Entity redemption (the business buys back the shares) is simpler to administer with more owners, since the business holds one policy per owner instead of a web of cross-policies, but doesn't step up the remaining owners' basis. Many multi-owner LLCs use a hybrid where the entity has the first right to redeem and remaining owners can step in if it doesn't.
How is the buyout price actually determined?
Three common approaches: a fixed price the owners agree to update annually (simple but easy to let go stale), a formula (a multiple of revenue or EBITDA, recalculated automatically), or an independent appraisal at the time of the triggering event (most accurate, but slower and costlier when it's actually needed). Whatever method you pick, the agreement should specify it precisely enough that it can't become its own dispute on top of the ownership change.
Why is life insurance the usual funding method?
Because death is the trigger event most likely to create an immediate, large cash need with no warning. A term life policy sized to the buyout obligation pays out income-tax-free and arrives right when it's needed, instead of forcing the surviving owners to take out a loan, drain the business's cash, or pay the departing owner's estate over years (which keeps the business financially entangled with people who no longer run it). Disability buyout insurance covers the same gap for a permanent disability trigger, which is easy to overlook since it's a much more common event than death.
We're a two-person LLC that gets along fine. Do we really need this?
Getting along today doesn't cover what happens if one of you dies, gets divorced, or simply wants to sell your half to a stranger next year — without an agreement, your operating partner could end up co-owning the business with your spouse's estate or a buyer they never chose. The agreement isn't about distrust between the current owners; it's about deciding the rules before an outside event (death, divorce, disability) forces a decision under pressure.

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Educational content only. This article is for informational purposes and does not constitute tax, legal, or financial advice. Every situation is different — consult a qualified professional before acting on anything here.