Letters of intent are usually not binding, but they can be, and the difference comes down to how the document is written and how the parties behave after signing it. Courts start from the assumption that an LOI is a preliminary framework for a deal still being negotiated. That assumption gives way when the language reads like a finished contract, when every material term is already settled, or when the parties act as if the deal is already done. Specific clauses inside an otherwise non-binding LOI, such as confidentiality and exclusivity, are typically binding on their own regardless of what the rest of the document says.
The Default Rule: Preliminary Until Proven Otherwise
Courts treat an LOI as an “agreement to agree” rather than a finished contract. The reasoning is practical. Parties use LOIs to stake out key deal points while leaving room for due diligence, financing contingencies, and detailed negotiation. Treating every preliminary document as binding would discourage anyone from putting anything in writing before they were ready to commit.
The presumption protects both sides. A buyer can investigate the seller’s financials, inspect assets, and secure funding without being locked in. A seller can entertain preliminary discussions without accidentally selling the business. But it is only a starting point, and it can be overcome.
What Makes an LOI Binding
Courts look at overlapping factors, not any single test. The Texaco v. Pennzoil litigation produced a jury verdict of $7.53 billion in damages plus $3 billion in punitive damages after a jury found that a memorandum of agreement was binding despite the absence of a formal signed contract. That case remains the standing warning about treating preliminary agreements too casually.
The Language of the Document
Words on the page matter more than anything else. Courts look at objective indicators of intent, not what either party privately believed. Words like “shall,” “agrees,” and “must” signal obligation. Phrases like “the parties hereby agree” suggest a present commitment. Governing-law clauses, dispute-resolution provisions, and other boilerplate typically found in finished contracts also push toward enforceability.
Explicitly stating that the LOI is “non-binding” or “subject to execution of a definitive agreement” is strong evidence that the parties did not intend to be bound. The absence of that language leaves the document open to interpretation. Most disputes start right here: one party assumed the LOI was just a handshake, and the other party points to language that reads like a contract.
Completeness of Terms
If the document covers every essential deal term, it starts to look less like a preliminary outline and more like a finished agreement missing only a signature. Courts examine whether the LOI identifies the parties, describes the subject matter, states the price, and sets a timeline. Expressions of agreement that are sufficient to form a contract do not lose that effect just because the parties also plan to draft a formal written version later.
Deliberately leaving minor terms open can support the argument that further negotiation was expected. There is a real tension in drafting: both sides want enough detail to guide the deal forward, but too much detail can convert the LOI into the deal itself.
Conduct After Signing
What the parties do after signing can override what the document says. If a buyer begins operating the target business, or a seller stops marketing the property to other buyers and starts transferring records, that conduct suggests both sides treated the LOI as done. Courts look at whether one party performed obligations contemplated in the LOI and whether the other party accepted that performance without objection.
Complexity of the Transaction
A straightforward purchase of a small asset might reasonably be concluded with a brief written agreement. A multibillion-dollar corporate acquisition is the kind of deal where a formal, fully negotiated contract would normally be expected. When the transaction is large and complex, courts are somewhat more reluctant to treat a short preliminary document as the final word, but this factor alone rarely decides the outcome.
Type I and Type II Preliminary Agreements
Federal courts, particularly in New York, sort preliminary agreements into two categories, and the category controls what a breach costs.
A Type I agreement exists when the parties have reached a complete meeting of the minds on every material term. The document is binding as a contract even though the parties plan to memorialize it in something more formal later. Breach is treated the same as any breach of contract, with the full range of remedies including lost profits.
A Type II agreement exists when the parties have agreed on major terms but acknowledge that open issues remain. They commit to negotiate the open items in good faith within the framework they have already established. They are not required to reach a final deal, but they cannot walk away for arbitrary reasons or insist on terms that contradict what they already agreed to.
Clauses That Bind You Even When the LOI Doesn’t
Even when the overall LOI is non-binding, specific clauses inside it are usually designated as binding. This hybrid structure is standard and gives parties targeted protection during the negotiation period without committing them to the underlying deal.
Confidentiality
During due diligence, a potential buyer sees proprietary financial data, customer lists, trade secrets, and operational details. A binding confidentiality clause ensures that if the deal falls apart, the buyer cannot use or share that information. These clauses routinely survive the termination of the LOI itself, sometimes for years and sometimes indefinitely. Before signing, check whether the obligation has a defined end date. A confidentiality obligation with no expiration effectively binds you permanently.
Exclusivity and No-Shop Clauses
An exclusivity clause prevents the seller from negotiating with other potential buyers for a set period. It gives the buyer a dedicated window to complete due diligence and arrange financing without the risk of being outbid. Typical exclusivity periods run 30 to 90 days, with 45 days a common starting point in private acquisitions. Larger or more complex transactions often warrant 60 to 120 days.
Good-Faith Negotiation Obligations
A binding duty to negotiate in good faith does not require the parties to reach a final agreement. It does require them to engage sincerely, respond to reasonable requests, and avoid sabotaging the process. Walking away because a better offer appeared, insisting on terms that flatly contradict the LOI, or dragging out negotiations to run the clock down can all constitute bad faith. This is the defining feature of a Type II preliminary agreement.
Breakup Fees
Some LOIs include a breakup or termination fee payable by the party that walks away under specified circumstances. For these provisions to hold up, courts generally require that they function as liquidated damages rather than penalties. The standard test asks two questions: were the potential damages from a failed deal difficult to estimate in advance, and is the fee reasonable relative to those anticipated damages? A breakup fee grossly disproportionate to the actual harm risks being struck down as an unenforceable penalty.
Promissory Estoppel: Liability Without a Binding LOI
Even when an LOI is clearly non-binding, a party can still face liability under promissory estoppel if the other side reasonably relied on promises in the document and suffered real losses as a result. The doctrine applies when a promise induces the other party to take significant action, the promisor could have foreseen that reliance, and enforcing the promise is necessary to prevent injustice.1Legal Information Institute. Promissory Estoppel
In practice, if you sign a non-binding LOI and the other party spends heavily on inspections, hires consultants, turns down competing offers, or sells existing assets in anticipation of closing, you can be on the hook for those costs even though the LOI itself was non-binding.1Legal Information Institute. Promissory Estoppel
What Breach Costs
The consequences depend on what was breached and how the court classifies the agreement.
Breach of a Type I agreement triggers the same remedies as any contract violation. The injured party can pursue expectation damages, which put them in the position they would have occupied had the deal closed. That usually means lost profits. For transactions involving unique assets like real estate, a court may order specific performance instead of money.
Breach of a good-faith negotiation obligation under a Type II agreement is harder to price. Some courts limit recovery to reliance damages, covering out-of-pocket expenses such as legal fees, consultant costs, and due diligence work. Other jurisdictions, including Delaware, allow expectation damages including lost profits if the non-breaching party can prove a final agreement would have been reached but for the bad-faith conduct. Proving lost profits with reasonable certainty is a high bar, but the possibility makes bad-faith negotiation a serious risk.
Breach of a specific enforceable provision inside an otherwise non-binding LOI exposes the breaching party to damages tied to that clause. A seller who breaks exclusivity and sells to a competing buyer can be liable for the original buyer’s wasted due diligence costs. A party that breaches confidentiality can be liable for the harm caused by the disclosure. Where a breakup fee applies, the fee itself typically defines the financial consequence.
How to Control Whether Your LOI Is Binding
The most important drafting step is to state clearly and prominently whether the LOI is intended to be binding. If you want a non-binding document, say so in plain language near the top. Then identify each provision you do intend to be binding, such as confidentiality, exclusivity, and any breakup fee, and state that those specific sections are enforceable.
Beyond the disclaimer, a few practical steps reduce the risk of an unintended obligation:
- Avoid contract-like verbs. “Agrees,” “undertakes,” “shall,” and “hereby” signal obligation. Use “proposes,” “contemplates,” or “the parties anticipate” for non-binding sections.
- Leave some terms open. If every detail is nailed down, the document looks like a finished contract. Deliberately reserving minor points for the definitive agreement supports the argument that more negotiation was expected.
- Watch your conduct. Do not start performing deal obligations before the definitive agreement is signed. Operating the business or transferring assets based on the LOI can override your disclaimer.
- Set expiration dates. Give the LOI a clear termination date and specify how long binding provisions like confidentiality and exclusivity survive.
- Skip unnecessary boilerplate. Governing-law clauses, indemnification provisions, and dispute-resolution mechanisms in a supposedly non-binding LOI can be read as evidence that a binding contract was intended.
The gap between what you intended and what a court concludes you intended is where LOI disputes live. Clarity in drafting and discipline in conduct after signing are the only reliable protections.