A buy-sell agreement is a legally binding contract between business owners that establishes what happens when an owner dies, becomes disabled, retires, or wants to leave the business. It pre-determines: who can buy the departing owner's share, how the business is valued, how the buyout is paid for, and what triggers the buyout.

Read our complete guide to buy-sell agreements.

Without one, a deceased partner's ownership share passes to their estate — meaning their spouse, children, or creditors could become your new co-owner. The surviving partners may not be able to afford the buyout. Clients and employees face uncertainty. The business may be forced to liquidate. A buy-sell agreement prevents all of this by pre-determining the terms.

See exactly what happens without an agreement.

Life insurance is the standard funding mechanism because it provides the full buyout amount immediately and tax-free at the moment it's needed. Other options include cash reserves (usually insufficient), bank financing (hard to get during business instability), and installment payments (stretches the business thin for years). Most experts recommend life insurance as the primary funding source.

Learn about all funding options.

In a cross-purchase agreement, each owner buys insurance on the other owners' lives and personally purchases the departing owner's share. In an entity purchase (redemption), the business itself owns the policies and buys back the share. Cross-purchase works best for 2-3 owners (stepped-up cost basis). Entity purchase works best for 4+ owners (simpler administration). A hybrid approach combines both.

Legal drafting typically costs $5,000-$15,000 depending on business complexity and number of owners. Life insurance funding costs $100-$500+/month per partner depending on age, health, and coverage amount. The total cost is a fraction of the amount the agreement protects — a $300/month insurance investment protects against a $1-3 million unplanned buyout.

Common methods include: multiple of earnings (EBITDA x industry multiple), formula approach (based on revenue or net income), fixed price (agreed amount, updated annually), or professional appraisal (independent valuation when triggered). Most agreements use a formula as the primary method with professional appraisal as the dispute resolution backstop.

See all valuation methods explained.

Typical triggering events include: death of an owner, disability (permanent incapacity), retirement, voluntary departure (owner wants to leave), involuntary separation (termination), and divorce (prevents an ex-spouse from becoming a co-owner). Each trigger can have different buyout terms and funding mechanisms.

Yes — a will and a buy-sell agreement serve different purposes. A will directs where your assets go after death. A buy-sell agreement determines what happens to your business ownership specifically — including valuation, funding, and transfer terms that a will cannot address. Without a buy-sell agreement, your will may give your heirs a business share they can't operate, creating conflict with surviving partners.

See our comparison of buy-sell agreements vs. wills.

Annually. The two most common failure points are outdated valuations and inadequate insurance coverage. Review the business valuation every year and update it. Adjust insurance coverage amounts to match the current valuation. Review triggering events and buyout terms whenever the ownership structure changes (new partner, partner departure, significant business growth).

Their ownership share passes to their estate. Their heirs become your new co-owners — even though they can't operate the business. You'll need to negotiate a buyout under pressure, potentially at an inflated price. The business may face operational paralysis, client attrition, and employee departures during the dispute. In worst cases, the business is forced to liquidate.

Read the full scenario breakdown.

Yes — this is one of the primary functions. The agreement requires that a deceased or departing partner's share be sold back to the remaining partners or the business entity at pre-agreed terms. The estate receives fair value in cash (funded by insurance), but the ownership interest transfers to the remaining owners, not to family members.

They serve different purposes and most businesses with partners need both. The buy-sell agreement handles ownership transitions (who gets the departing partner's share and at what price). Key man insurance covers the operational and financial impact of losing any critical person — revenue replacement, hiring replacements, covering debts. The buy-sell agreement handles the ownership. Key man insurance handles the business operations.