The business sale agreement
By the time you reach the purchase agreement, the hard parts of the deal are mostly behind you. This is the document that turns a handshake into a closing. Here is what's inside it, how an asset deal differs from a stock deal, and why this is the moment to have a good M&A attorney in your corner.
What the business sale agreement is
The business sale agreement, often called the definitive purchase agreement, is the binding contract that actually transfers your company to the buyer. Everything before it sets up the deal. This is the deal. It fixes the final price, spells out what the buyer is getting, lays out the promises each side is making, and describes exactly what has to happen for money to change hands.
It comes in two main forms depending on how the deal is structured. In an asset purchase agreement (APA), the buyer acquires specific assets of the business and assumes only the liabilities it agrees to take on. The legal entity, along with its history, stays with you. In a stock purchase agreement (SPA), the buyer acquires the ownership shares of the company itself, so the business keeps running with all of its assets, contracts, and liabilities attached.
That structural choice is not a footnote. It shapes taxes, risk, and a lot of the contract's language. Buyers often lean toward an asset deal because it limits their exposure to unknown liabilities. Sellers often prefer a stock deal because it can be cleaner and more tax-efficient. The right answer depends on your situation, your entity type, and the tax picture, which is exactly why you want an advisor and a tax professional weighing in early.
| Structure | Buyer acquires | Often favored by |
|---|---|---|
| Asset purchase (APA) | Chosen assets, named liabilities | Buyers |
| Stock purchase (SPA) | Equity of the company | Sellers |
Which structure fits your deal depends on tax, liability, and entity factors. Confirm it with your M&A advisor and attorney, not a template.
When it gets signed
The purchase agreement does not show up at the start. It arrives after two earlier steps are done. First you negotiate and sign a letter of intent, which sets the headline price and structure and usually grants the buyer a period of exclusivity. Then the buyer runs due diligence, digging into your financials, contracts, customers, and operations to confirm the business is what they were told it is.
Only once diligence holds up does the definitive agreement get drafted. It takes everything that was loosely agreed in the LOI and everything that surfaced in diligence and turns it into a binding, detailed contract. In some deals, signing and closing happen on the same day. In others the parties sign first, then close later once a set of conditions are satisfied. Either way, signing this is the point of no easy return.
The key sections you'll negotiate
Purchase agreements are long, and most of the length is there to protect one side or the other. A handful of sections carry the real weight.
- Purchase price and adjustments. The number from the LOI rarely survives untouched. The agreement defines the price and the mechanics that adjust it, most commonly a working capital adjustment that trues up the price based on the cash, receivables, and payables in the business at closing. Earnouts, seller notes, and rollover equity, if any, live here too.
- Representations and warranties. These are the factual promises you make about the business: that the financials are accurate, that you own what you're selling, that there's no hidden litigation, that contracts are valid. If a rep turns out to be wrong, the buyer has a claim. This is one of the most heavily negotiated parts of the whole document.
- Indemnification. This sets out who pays, and how much, if a representation is breached or a covered problem appears after closing. Watch the caps (the most you can be on the hook for), the survival periods (how long claims can be brought), and the baskets or thresholds (how big a problem has to be before a claim counts).
- Covenants. Promises about behavior, often covering the gap between signing and closing. A common one is that you'll keep running the business normally and won't make big changes without the buyer's sign-off.
- Conditions to close. The boxes that must be checked before either side is obligated to complete the deal: required consents, financing, no major adverse change in the business, regulatory approvals where they apply.
- Escrow and holdback. A slice of the price set aside for a defined period after closing, available to the buyer if a rep proves inaccurate or an indemnity claim arises. The size, the term, and what it can cover are all negotiable.
- Non-compete and non-solicit. Buyers want assurance you won't walk out the door and start a competing business or pull away the customers and staff they just paid for. Expect restrictions on scope, geography, and time, and negotiate them so they're reasonable.
None of these terms are filler. The price headline gets the attention, but the value you actually keep is often decided in the indemnification caps, the escrow amount, and the working capital adjustment.
Why you need an M&A attorney
This is not the place to save money on legal help. A general business lawyer can review a lease. The purchase agreement is a different animal, and the difference between a well-negotiated indemnification section and a sloppy one can be a large amount of your proceeds sitting at risk for years.
An experienced M&A attorney drafts and negotiates the terms that protect you: the survival periods, the caps, the carve-outs, the definition of working capital, the disclosure schedules that qualify your representations. A tax advisor confirms the structure works for your situation, because an asset deal and a stock deal can land very differently on your tax bill. Good advisors pay for themselves here many times over. To be clear, this article is general information and not legal advice. Engage qualified counsel before you sign anything.
How it differs from the letter of intent
People sometimes treat the LOI as if it's the deal. It isn't. The letter of intent is mostly a non-binding outline. It agrees on the broad shape of the transaction, price, and structure, and it commits the parties to a process. With a few exceptions, like confidentiality and exclusivity, it doesn't bind anyone to actually close.
The purchase agreement is the opposite. It's binding, it's detailed, and it controls. Where the LOI says "around this price," the agreement says exactly how the price is calculated and adjusted. Where the LOI is silent on what happens if a promise turns out false, the agreement has pages on indemnification. If you want the longer version of how the LOI works and where it fits, read our guide to the letter of intent in a business sale. Just don't mistake the outline for the contract.
How ProCloser fits in
A clean purchase agreement starts long before the lawyers draft it. It starts with a well-run process, a fair valuation, and an advisor who's negotiated these terms before. ProCloser matches business owners with vetted M&A advisory firms, including no-retainer, success-only options that get paid when your deal closes. It's free to sellers and confidential.
If you're early, start with our guide to selling your business to see the full path from decision to closing. When you're ready to talk to someone who does this for a living, get matched with an advisor. The first conversation, what we call an M&A Matching Sync, is a free, no-obligation call to understand your business and connect you with the right firm.
Curious who you'd actually be working with? See the difference between a business broker and an M&A advisor, and the kinds of buyers who might sit across the table. If you've got time before a sale, building value first can move both your price and your leverage in these negotiations.
Business sale agreement FAQ
What is a business sale agreement?
It's the binding, definitive contract that transfers ownership of a business from seller to buyer. Depending on structure it's an asset purchase agreement (the buyer takes specific assets and named liabilities) or a stock purchase agreement (the buyer takes the company's equity). It sets the final price and adjustments, the representations and warranties, indemnification, covenants, and the conditions to close. Unlike the letter of intent, it actually governs the sale.
Asset purchase vs. stock purchase: what's the difference?
In an asset purchase the buyer takes chosen assets and only the liabilities it agrees to, leaving the legal entity with you. In a stock purchase the buyer takes the company's shares, so the business continues with everything attached. Buyers often prefer asset deals to limit liability exposure; sellers often prefer stock deals for cleaner, more tax-efficient outcomes. Confirm which fits your situation with your advisor and attorney.
When is the sale agreement signed?
After you sign the letter of intent and after the buyer completes due diligence. The LOI sets the headline terms, diligence confirms the business checks out, and the purchase agreement turns it all into a binding contract. Sometimes signing and closing happen the same day; sometimes the parties sign first and close once conditions are met.
Do I need an attorney?
Yes. The agreement is where real money is won or lost, in the representations, indemnification caps, escrow, and working capital adjustment. An experienced M&A attorney drafts and negotiates these to protect you, and a tax advisor confirms the structure works. This page is general information, not legal advice. Engage qualified counsel before signing.
What is escrow or a holdback?
A portion of the purchase price set aside for a defined period after closing. If a seller representation proves inaccurate or an indemnity claim arises, the buyer can recover from those funds. The amount, term, and permitted uses are all negotiated in the agreement. Clean financials and honest disclosures help keep this exposure small.
Get to a clean purchase agreement.
A well-run process and a seasoned advisor make the sale agreement go your way. We'll match you with a vetted M&A advisor and give you a free, confidential indicative valuation. Free to sellers. No retainer to find out.
Tania leads ProCloser's network of vetted M&A advisory firms and works with business owners every week on valuation, fit, and getting matched to the right advisor to sell. Get matched free.