Overview
A Letter of Intent (LOI) is one of the most misunderstood documents in business law. It looks like a contract, reads like a contract, and is often treated like a contract — but most of it isn't. Understanding exactly which provisions bind you and which don't is the difference between a smooth negotiation and a costly legal dispute before the real deal is even signed.
An LOI is a preliminary agreement used across M&A transactions, real estate deals, commercial leases, joint ventures, and strategic partnerships. It documents that two parties have reached agreement on the essential terms of a deal and intend to proceed toward a definitive contract. The document serves multiple purposes: it aligns expectations early, provides a framework for due diligence, and signals to the other party (and their advisors) that the deal is real.
The structure of a typical LOI is split into two distinct zones. The non-binding zone covers the business terms — price, structure, timeline, contingencies — which remain subject to negotiation, due diligence, and definitive documentation. The binding zone covers procedural matters that must be enforceable right now: exclusivity (no-shop), confidentiality, expense allocation, and governing law. This split architecture is intentional and legally deliberate.
In M&A, LOIs are sometimes called Term Sheets or Heads of Agreement depending on the jurisdiction and transaction type. In real estate, the same document is often called a Letter of Intent or Offer to Lease. The underlying legal principles are consistent: key terms are agreed, binding commitments are narrow, and both parties are expected to negotiate in good faith toward a closing. What constitutes "good faith" in this context has generated enormous litigation, and is one of the most important issues LOI drafters must address precisely.
Key Clauses to Review
Binding vs. Non-Binding Provisions
The most critical architectural feature of any LOI. The document must clearly state which provisions are legally binding (typically: confidentiality, exclusivity, expense allocation, governing law, and the binding/non-binding statement itself) and which are non-binding expressions of intent (typically: price, structure, representations, conditions to close). This is usually accomplished through a clear introductory paragraph and a specific section explicitly listing the binding provisions by name.
Ambiguous language like "the parties agree to use best efforts to negotiate" — courts have split on whether this creates a binding obligation to negotiate. Missing explicit carve-outs for which sections are binding. LOIs that use purely contractual language throughout without distinguishing binding from non-binding terms. This is the single most litigated issue in LOI disputes.
Exclusivity / No-Shop Clause
A binding provision prohibiting the seller or target from soliciting, entertaining, or negotiating competing offers for a defined period, typically 30-90 days. This is the primary concession the buyer receives in exchange for investing in due diligence. The exclusivity period must be long enough for the buyer to complete diligence and negotiate definitive documents, but short enough that the seller isn't locked up unreasonably. Some LOIs include a fiduciary out for board-level obligations.
Exclusivity periods exceeding 90 days without clear milestones or termination triggers. No carve-out for unsolicited competing offers in transactions where the board has fiduciary duties. Vague definitions of what constitutes a "competing offer" or "solicitation." Missing remedies for breach — exclusivity without teeth is unenforceable in practice.
Confidentiality Obligations
A binding provision governing the treatment of information exchanged during the LOI negotiation and due diligence process. This clause typically mirrors a standalone NDA and covers definition of confidential information, permitted uses, return/destruction obligations, and term. In many transactions, a separate NDA is executed alongside the LOI; in others, the LOI's confidentiality section stands alone. Either approach is acceptable if the provisions are comprehensive.
Confidentiality provisions that are thinner than what a standalone NDA would provide — parties sometimes underweight this because they're focused on the deal terms. Missing carve-outs for required regulatory disclosures. No mechanism for handling confidential information if the deal falls through. Confidentiality that expires before the transaction is completed or abandoned.
Due Diligence Conditions and Access
Specifies the scope and process of the buyer's investigation of the target, including access to facilities, personnel, financial records, customer contracts, IP, and litigation. Sets the timeline for completion of due diligence and identifies conditions that, if not satisfied, allow the buyer to terminate the LOI. This section is non-binding as to ultimate obligation to close but may create binding procedural obligations around access.
Unlimited or undefined due diligence scope that gives one party unreasonable access to sensitive competitor information. No mechanism to terminate the LOI if due diligence reveals material issues. Tight timelines that don't give the buyer adequate time for meaningful investigation. Missing data room or virtual access protocols for sensitive documents.
Break-Up Fee and Expense Allocation
Addresses who pays for deal costs (legal, accounting, advisory fees) if the transaction does not close, and whether a break-up fee is payable if either party walks away. In large M&A transactions, reverse break-up fees paid by buyers are common. In smaller deals, each party bears its own expenses. This clause is typically binding and provides predictability for both parties on downside exposure.
Asymmetric expense provisions that shift all costs to one party without justification. Break-up fees set so high they effectively compel completion of a bad deal. Missing specificity about what triggers the fee — "failure to close" needs to distinguish between regulatory block, due diligence termination, and breach. No cap on reimbursable expenses if the other party runs up costs.
Conditions to Closing
Identifies the major conditions that must be satisfied for the parties to be obligated to proceed to a definitive agreement and ultimately close. Typical conditions include satisfactory due diligence, board approvals, regulatory clearances, third-party consents, financing, and absence of material adverse change. These are non-binding expressions of what will need to happen, not binding commitments that they will happen.
Conditions drafted so broadly that either party can walk away on any pretext. Material Adverse Change (MAC) definitions that are either too vague or exclude obvious events. Missing specific regulatory approvals that are known to be required. Conditions that are entirely within one party's control — these are effectively escape hatches, not conditions.
Risk Assessment
The most acute risk in LOI practice is the "binding when you don't expect it" problem. Courts in multiple jurisdictions have found that detailed LOIs with specific price terms, timelines, and conditions created binding obligations to negotiate in good faith — even when the document said "non-binding." The more complete and specific the business terms in an LOI, the more courts scrutinize whether there was actual mutual intent to be bound.
Exclusivity provisions create significant litigation exposure when deals fall apart. If a seller enters into discussions with a competing buyer during an exclusivity period, the original buyer has a clear breach of contract claim regardless of whether the ultimate transaction terms were non-binding. Damages can be substantial — courts have awarded the full value of the deal in some cases.
In real estate LOIs specifically, there is a line between an LOI that creates a binding obligation to lease and one that merely creates an obligation to negotiate. Courts look at specificity of terms, conduct of the parties, and whether one party relied on the LOI to their detriment. Real estate LOIs should be drafted with particular care given the significant capital commitments involved.
The confidentiality risk in LOIs is often underestimated. Information exchanged during due diligence — particularly in competitive acquisition processes — can be enormously sensitive. A buyer who uses confidential information gleaned during a failed LOI process to later compete with the target has clear exposure. This risk cuts both ways: sellers who share customer lists and financial models need robust protections; buyers who share acquisition strategies and financing terms need the same.
Finally, the expense risk in failed transactions is real. Legal fees, accounting diligence, financial advisory fees, and management time in a mid-market M&A process can easily run $500K-$2M per side. Without clear expense allocation provisions in the LOI, disputes over who bears these costs after a deal falls apart are common.
Best Practices
Draft the binding/non-binding distinction first, before anything else. The architectural clarity of your LOI depends entirely on this. Use explicit language in the opening recitals: "Except for the Binding Provisions identified in Section X, this LOI is not intended to create any legally binding obligations between the parties." Then list the binding sections by name and number. Never leave this to implication.
Negotiate exclusivity duration and scope carefully — this is the buyer's most valuable LOI concession. Tie the exclusivity period to specific milestones: delivery of due diligence materials, management presentation, draft definitive agreement. If milestones slip because of the seller's failure to provide access or information, the exclusivity period should toll. Build in a termination mechanism if due diligence reveals material issues that weren't disclosed.
For confidentiality, treat the LOI's confidentiality provisions with the same rigor you'd apply to a standalone NDA. Define confidential information specifically. Require return or destruction of materials if the deal falls through. Address what happens to analyses, summaries, and work product prepared by the receiving party based on confidential information. Include a standstill provision preventing the buyer from using confidential information to acquire the target's securities or customers if the deal fails.
Use the LOI to flush out issues early. The detailed negotiation of LOI terms — particularly representations, MAC definitions, and conditions to close — will reveal where the parties actually disagree. It's far cheaper to discover a fundamental disagreement about post-closing employment arrangements at the LOI stage than after two months of full diligence and draft agreement negotiation.
Set a clear timeline with specific milestone dates. Vague timelines invite delay and create pressure asymmetries. A well-structured LOI specifies: due diligence completion date, delivery of draft definitive agreement, target closing date, and what happens if any date is missed. This transforms the LOI from an expression of hope into an actual roadmap.
Frequently Asked Questions
Is a letter of intent legally binding?
Most of it isn't — but parts of it are, and that distinction matters enormously. Typical LOIs are non-binding as to the business terms (price, structure, conditions) but binding as to procedural terms (confidentiality, exclusivity, expense allocation). Courts have found full LOIs binding in cases where the terms were sufficiently specific and the parties' conduct indicated mutual intent to be bound. Every LOI must explicitly state which sections are binding and which are not.
What's the difference between an LOI and a term sheet?
Functionally, very little — both serve the same purpose of documenting preliminary agreement on key terms before definitive documentation. "Term Sheet" is more common in venture capital and startup financing (where it comes from the investor to the company). "Letter of Intent" is more common in M&A and real estate. "Heads of Agreement" is common in Commonwealth jurisdictions. The binding/non-binding analysis is identical regardless of what the document is called.
How long should an LOI exclusivity period be?
Typically 30-60 days for smaller transactions and 45-90 days for larger or more complex deals. The period should be long enough for the buyer to complete meaningful due diligence and negotiate a draft definitive agreement, but short enough that the seller isn't locked up unreasonably. Always tie the exclusivity period to specific milestones rather than a fixed date — if due diligence access is delayed, the period should toll accordingly.
Can I walk away from an LOI?
Yes — that's the entire point of the non-binding structure. However, you remain bound by the binding provisions (confidentiality, exclusivity during the period, expense allocation). If you walk away during an active exclusivity period without a valid termination trigger, you may owe the other party damages. If you walk away after exclusivity expires, you can walk — though you remain bound by confidentiality indefinitely (or for whatever term was specified).
Should I sign an LOI before doing due diligence?
In most M&A transactions, the LOI is signed first and due diligence follows — that's the standard sequencing. The LOI grants the buyer the right to conduct diligence and the seller agrees to exclusivity in exchange. In some situations (particularly where the seller has leverage), the buyer may negotiate for a "light" due diligence period before LOI signing to de-risk the exclusivity grant. What you should never do is sign an LOI with no due diligence rights at all.