Every letter of intent in a business acquisition begins with the same assumption: both parties can walk away at any time until the definitive agreement is signed. That assumption is often wrong.
So is a letter of intent legally binding? Buyers and sellers who treat the letter of intent as a casual handshake sometimes discover that specific provisions, or even the document as a whole, created enforceable obligations neither side intended.
Understanding which parts of an LOI bind, which parts do not, and how careless drafting turns non-binding language into a nine-figure liability is essential before either side signs.
What an LOI Typically Contains
A letter of intent in a business acquisition maps out the shape of the deal before the parties commit to a definitive agreement. Most LOIs include the identities of the buyer and seller, a proposed purchase price or valuation methodology, the deal structure (asset or stock purchase), payment terms, timeline for due diligence, and any conditions to closing.
Beyond the commercial terms, the LOI usually contains provisions that are meant to bind immediately. These include confidentiality, exclusivity, expense allocation, and governing law. The mix of binding and non-binding provisions in the same document is exactly where enforceability disputes begin.
Is a Letter of Intent Legally Binding?
The short answer is that most letters of intent are non-binding, except for specific carve-outs that both sides intend to enforce from the moment of signature.
The longer answer is more complicated, because a court asked to enforce an LOI does not stop at the label the parties chose. Judges read the document as a whole and ask what the parties actually agreed to.
What Typically Binds
Certain provisions almost always bind, regardless of how the rest of the document is framed:
- Confidentiality and non-disclosure obligations covering shared information.
- Exclusivity or no-shop periods restricting the seller from talking to other buyers.
- Expense allocation, including who pays for what if the deal falls apart.
- Governing law and dispute resolution clauses.
- Standstill provisions and any break fees agreed to at the LOI stage.
What Typically Does Not Bind
Commercial terms usually stay non-binding until the definitive agreement is signed. Purchase price, deal structure, closing conditions, and representations all remain open for negotiation. Either party can walk away without owing the other side the value of the deal.
How Courts Read the Document
Judges do not treat the LOI as a collection of independent clauses. When a dispute reaches court, the entire document gets analyzed in context, along with the parties’ conduct before and after signing.
Ambiguous language, expressions of intent to be bound, and course of performance can all make provisions enforceable even when the LOI states otherwise.
When Courts Have Enforced Supposedly Non-Binding LOIs
Two cases show what happens when an LOI is drafted or handled carelessly. Both produced judgments large enough to reshape how sophisticated parties approach preliminary agreements.
SIGA v. PharmAthene (Delaware, 2015)
In SIGA Technologies v. PharmAthene, the Delaware Supreme Court affirmed a $113 million expectation damages award against SIGA for breaching its obligation to negotiate a license agreement in good faith. The parties had signed a term sheet stating that they would work toward a definitive license if their planned merger did not close.
The merger fell through, SIGA walked away from the license negotiations, and the Delaware courts found that SIGA had negotiated in bad faith. Because the parties had preliminarily agreed to the major license terms, the court awarded PharmAthene the value of the license under an expectation damages theory rather than limiting recovery to out-of-pocket costs.
Texaco v. Pennzoil (Texas, 1987)
In Texaco v. Pennzoil, a Texas jury awarded Pennzoil $10.5 billion for Texaco’s tortious interference with a preliminary agreement Pennzoil had reached with Getty Oil. The Getty-Pennzoil arrangement included a memorandum of agreement that referenced a “definitive merger agreement” the parties had not yet signed.
Texaco argued that no binding contract existed and made a competing offer to Getty. The jury disagreed, finding that the Getty-Pennzoil memorandum reflected a binding deal. The judgment forced Texaco into bankruptcy and became one of the largest civil awards in United States history.
What Courts Look For
Across jurisdictions, courts weighing whether a preliminary agreement is enforceable focus on three main questions:
- Definiteness: Did the parties agree on enough material terms for the court to enforce something specific?
- Intent: Did the parties objectively intend to be bound, based on the document and their conduct?
- Part performance: Did one or both parties act as if the agreement was already in force?
Jurisdictional Variation
Delaware, New York, and California each apply somewhat different frameworks to preliminary agreements. Delaware recognizes “Type II” agreements that bind parties to negotiate in good faith even when key commercial terms remain open.
New York courts tend to be more skeptical of enforcing preliminary agreements without clear commitment language. California courts typically look at the totality of the circumstances. Buyers and sellers should confirm which state law governs the LOI before assuming any provision is truly non-binding.
LOI Language That Can Create Binding Risk
Certain phrases make an otherwise informal LOI enforceable. These formulations appear regularly in first drafts, often placed there by parties who assume the non-binding label at the top of the document neutralizes them.
Language that has led to enforcement disputes includes:
- “The parties agree to negotiate in good faith” toward a definitive agreement.
- “The parties shall proceed toward closing” once certain conditions are met.
- “Subject only to definitive documentation” of the agreed terms.
- “This LOI reflects the agreed terms” of the transaction.
- “The parties intend to be bound” upon execution of this letter.
Each of these phrases signals that the parties viewed the LOI as more than a preliminary discussion. Combined with the course of performance, they can support a claim that the entire preliminary agreement, or at least specific provisions, is enforceable regardless of what the header of the document says.
The Good-Faith Negotiation Trap
The most dangerous provision in a modern LOI is often the shortest one: an agreement to negotiate in good faith toward a definitive agreement. Parties add this language to signal seriousness, without appreciating that it creates a legally enforceable duty in several jurisdictions.
What Good-Faith Negotiation Actually Requires
A good-faith negotiation obligation requires each side to make reasonable efforts to reach agreement on the open terms. It does not force either party to accept unfavorable terms. It does prevent walking away for pretextual reasons, using the negotiation to extract concessions elsewhere, or deliberately proposing terms designed to sabotage the deal.
What Triggers Liability
Liability attaches when a court finds that one side negotiated dishonestly, refused to consider reasonable proposals, or acted with intent to prevent a definitive agreement despite the good faith obligation.
The SIGA case turned on exactly this finding: SIGA had committed to negotiate in good faith, then insisted on economic terms materially different from the term sheet once its position improved.
Damages: Expectation Versus Reliance
Historically, courts limited recovery for breach of preliminary agreements to reliance damages, meaning out-of-pocket costs the non-breaching party incurred while negotiating.
SIGA changed that calculation in Delaware by allowing expectation damages, or lost profits, when the parties would have reached agreement but for the bad faith conduct. Expectation damages can turn a walk-away into a nine-figure judgment.
Why the Non-Binding Label Does Not Eliminate the Risk
Labeling an LOI as non-binding does not eliminate a specific good faith negotiation obligation embedded elsewhere in the document. Courts read the two provisions together and often find that the good faith clause survives even when everything else remains preliminary.
5 Best Practices for Making Sure the LOI Is Not Legally Binding
The following practices help ensure that only the intended provisions bind, and that the parties preserve the right to walk away without triggering a lawsuit.
1. Include Explicit Non-Binding Language
The LOI should state clearly and prominently that it is non-binding except for identified provisions. The clause should appear both at the top of the document and at the end, drafted in plain terms a court cannot overlook.
2. Enumerate Which Provisions Bind
Rather than leaving the reader to guess, the LOI should list the specific paragraphs or sections that are legally enforceable from the moment of signature. This eliminates arguments about which provisions were meant to survive termination of the negotiations.
3. Avoid Good Faith Language Unless Intended
Parties who do not want to be bound by a good faith negotiation obligation should not include one. If the LOI must reference future negotiations, the language should specify that no party has any duty to reach agreement and that either side may terminate discussions at any time for any reason.
4. Cap Exclusivity Tightly
Exclusivity periods should match the diligence timeline. For small business deals, 60 to 90 days is standard, with the option to extend by written agreement. Open-ended exclusivity creates leverage for the seller if the buyer walks and leverage for the buyer if the seller tries to.
5. Include Termination Rights and a Sunset Provision
Every binding LOI provision should have a defined end date. Confidentiality can survive for a set period, exclusivity should have a hard stop, and the entire LOI should terminate if a definitive agreement is not signed by a specific date.
What to Do If a Party Is Already Bound
Sometimes parties realize after signing that the LOI contains language creating enforceable obligations they did not intend. Options remain, but each requires attention before the situation gets worse.
- Amend the LOI to add explicit non-binding language covering the problematic clause, provided the other side agrees.
- Document good faith attempts to negotiate, including specific proposals and counterproposals, in case the record later becomes evidence in a dispute.
- Consult experienced counsel before walking away or shifting position, since the wrong move can convert a manageable situation into a full liability claim.
Acting early with legal input almost always produces a better outcome than deciding to walk away and hoping the other side does not pursue a claim.
Getting the Financial Terms Right at the LOI Stage
LOI enforcement disputes often start over financial terms that were promised at the LOI stage and later challenged during diligence. A price, working capital target, or EBITDA figure written into the LOI is a commitment, and revisiting it later without justification can look like bad-faith negotiation to a court.
Legal Dealmakers works with a partner CPA team offering QoE Lite Report analysis alongside the LOI drafting process, so buyers and sellers only put numbers into the LOI that hold up under scrutiny.
When the financial diligence runs in parallel with the LOI negotiation rather than after it, the parties avoid the situation where a post-signing EBITDA adjustment or working capital reset gives the other side grounds for a good-faith dispute.
The combined engagement means the numbers going into the definitive asset purchase agreement match what was promised at the LOI stage.
Protect the Right to Walk Away Before Signing the LOI
Every letter of intent involves real legal exposure, whether the parties recognize it or not, and both buyers and sellers benefit from experienced counsel reviewing the document before signature.
Legal Dealmakers drafts and reviews LOIs for both sides of small and midsize business transactions, focusing on the binding and non-binding mechanics that determine whether the parties actually preserve their right to walk away.
Buyers and sellers with an LOI on the table can reach the team through the contact page or by calling 844-332-5657.
