A letter of intent is not automatically a binding contract, but treating it as a harmless formality is how people get sued. Whether a letter of intent binds you depends on what the document actually says, how much of the deal it already settles, and what both sides do after signing. Most well-drafted LOIs are hybrids: the headline deal terms stay open while specific clauses, like confidentiality and exclusivity, create enforceable obligations the moment you sign.
What Makes an LOI Binding or Not
The label on the document does not control. Courts look at the words inside: how much detail the LOI contains, whether it uses commitment language like “agree,” “shall,” and “accept,” and whether the parties left anything meaningful to negotiate. An LOI that spells out every material term and does not condition the deal on a later formal contract can be enforced as a contract right now, title notwithstanding.
To keep an LOI from binding you, the drafting has to say so. Explicit disclaimers do the work: “this letter is non-binding,” “for discussion purposes only,” or “subject to execution of a definitive agreement.” A clear standalone clause is far stronger than a vague line tucked at the bottom. The safest approach identifies, clause by clause, which provisions bind and which do not.
The opposite situation is just as important to recognize. If your LOI already covers the purchase price, payment structure, closing date, and other significant terms, and the parties have started performing under those terms, the lack of a formal signed contract may not save whoever wants to walk away.
The Parts of an LOI That Usually Do Bind You
Even in an LOI that is non-binding as to the deal itself, certain provisions are written to take effect immediately. Expect these to be enforceable against you regardless of whether the transaction ever closes.
Confidentiality
Almost every LOI in a business acquisition or major transaction includes a confidentiality clause that is explicitly binding. During due diligence, the other side gets sensitive financial data, customer lists, trade secrets, and operational details. The confidentiality provision bars disclosure or use outside the proposed transaction, and these obligations typically survive even if the deal falls apart.
Exclusivity and No-Shop Clauses
An exclusivity or “no-shop” clause stops the seller from soliciting or entertaining competing offers for a set period, usually 30 to 90 days in M&A transactions. It gives the buyer breathing room to do diligence without worrying the seller is shopping the offer to drive up price. Breaching a no-shop can expose the seller to damages, and some deals include a break-up fee if the seller closes with someone else in violation of the clause.
Expenses and Termination
LOIs frequently specify who pays for due diligence, legal fees, and other pre-closing costs, and those allocations are generally binding. Termination clauses are binding too: they define when either party can end the LOI, such as missing a milestone, hitting an expiration date, or mutual consent. When termination fires, binding provisions like confidentiality usually survive even as the rest of the LOI falls away.
The Good Faith Negotiation Trap
Here is where signers get caught. Even a clearly non-binding LOI can create a duty to negotiate the remaining terms in good faith. Courts in several states have held that when parties sign an LOI and agree to work toward a definitive agreement, they implicitly promise not to sabotage that process, stonewall unreasonably, or use the LOI as a stalling tactic while chasing a better deal elsewhere.
This duty does not force you to accept bad terms or close a deal you no longer want. Walking away because the numbers stop working is fine. Walking away because a better offer appeared and you never told the other party is where liability starts.
The scope depends on the LOI’s language. Phrases like “best efforts” or “good faith” in connection with reaching a definitive agreement make courts more willing to enforce the obligation and award the other side’s reliance costs. If you want to preserve the freedom to walk away cleanly, leave those phrases out and include an express statement that neither party assumes any obligation to reach a final agreement.
How Courts Decide When the LOI Is Ambiguous
When disputes reach court, judges often sort preliminary agreements into two categories. A Type I preliminary agreement is one where the parties have already agreed on every material term and simply have not drafted the formal contract. Courts treat Type I agreements as fully binding regardless of any non-binding label, because nothing is left to negotiate. A Type II preliminary agreement still has open terms. It does not lock the parties into the final deal, but it does create an obligation to negotiate the open issues in good faith within the LOI’s framework.
Several factors push an LOI toward the binding end: no express reservation against being bound without a formal writing, commitment-style language, parties already performing under the LOI, all material terms settled, and a type of transaction that would normally be put in a formal contract. The more boxes check, the harder it is to argue the LOI was just a conversation starter.
Where the document itself is ambiguous, courts look past it. Post-signing conduct matters: a buyer who starts renovating the property, or a seller who takes the business off the market and begins handing over operations, is creating evidence both sides treated the LOI as more than a wish list. Emails and texts get scrutinized too. A message saying “we have a deal” or “looking forward to closing next month” undercuts a later claim that the LOI was non-binding. If two companies have previously signed non-binding LOIs and treated them that way, a court may extend the pattern.
When Non-Binding Still Costs You: Promissory Estoppel
Even a genuinely non-binding LOI can produce liability through promissory estoppel. The doctrine applies when one party makes a clear promise, the other reasonably relies on it and spends money or takes action as a result, and allowing the promise to be broken would cause serious injustice.
The classic example is a tenant who begins expensive build-out work on a commercial space based on promises in a non-binding LOI. If the landlord then backs out and leases to someone else, a court can hold the landlord liable for the tenant’s construction costs even without a binding contract. Damages usually cover only what the injured party actually spent in reliance, not the profit they would have earned on the completed deal. Courts apply the doctrine sparingly, but it is a real risk whenever an LOI contains specific commitments the other side acts on.
Higher-Risk Contexts: Real Estate and Employment
Commercial Real Estate
Real estate LOIs are especially risky because these deals involve so many essential terms. A commercial LOI that specifies the property, purchase price, earnest money, financing, closing date, due diligence requirements, and property condition has covered enough ground that a court could treat it as a binding purchase agreement.
Statute of frauds considerations add to the exposure. Most states require contracts for the sale of land to be in writing and signed by the party to be charged. An LOI that satisfies this and contains all material terms removes one of the traditional defenses to enforcement, which makes clear non-binding language even more important in real estate than elsewhere.
Employment Offer Letters
An LOI expressing a company’s intent to hire someone is generally non-binding and does not restrict the candidate from pursuing other opportunities. An offer letter that specifies salary, start date, title, and benefits, and that the candidate signs and returns, looks much more like an employment contract. Candidates who resign from current jobs in reliance on a binding offer letter may have legal recourse if the company rescinds it.
How to Sign an LOI Without Getting Trapped
Drafting an LOI that does only what you want it to do takes more care than most people assume. A few habits make the difference between a useful negotiation tool and an accidental contract.
- Label every provision. A clause-by-clause designation of what binds and what does not is stronger than a single blanket disclaimer at the top. Something like “Except for Sections 5, 6, and 7, which are binding, this LOI does not create enforceable obligations” gives a court clear direction.
- Keep commitment language out of the non-binding sections. “Shall,” “agree,” and “will” can undercut a non-binding disclaimer. Use “propose,” “anticipate,” or “contemplate” when describing terms still subject to a definitive agreement.
- Reserve rights expressly. State that neither party assumes any obligation to reach a final agreement and that either party may terminate negotiations at any time for any reason, subject only to the binding provisions.
- Be careful with “good faith” and “best efforts.” These phrases can create an enforceable duty to negotiate that survives even a non-binding disclaimer. Leave them out if you want maximum flexibility to walk away.
- Set an expiration date. An LOI that lingers indefinitely creates open-ended uncertainty. Include a specific deadline for executing a definitive agreement or letting the LOI expire.
- Get legal review before signing. A few hours of attorney time costs little compared with the exposure a poorly worded LOI can create.
An LOI sits somewhere on the spectrum between a casual expression of interest and a fully binding contract. Where yours falls depends almost entirely on what it says and how both sides behave after signing. The only safe approach is to treat every LOI as if it might be enforced, especially the ones you were told were not.