A letter of intent (LOI) is the document that moves a sell-side M&A process from competitive to bilateral. When a buyer submits an LOI, they are committing resources — legal, financial, organizational — to a defined path toward close. For the sell-side advisor, the LOI marks the end of open competition and the beginning of the most consequential negotiation in the engagement.
Getting the LOI terms right before countersigning is one of the highest-leverage things a seasoned advisor does. What gets left vague at the LOI stage becomes a pressure point during due diligence and definitive documentation — when the seller has no remaining competitive leverage.
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Where the LOI Fits in the Sell-Side Process
The LOI arrives after the indication of interest (IOI) round and management presentations. A standard structured sale process runs:
- Advisor pitchbook → mandate won
- CIM, teaser, and buyer list prepared
- Teaser distribution → NDA execution → CIM distribution
- IOI deadline — buyers submit non-binding indications
- Management presentations — shortlisted buyers meet management
- Preliminary data room access
- LOI deadline — buyers submit binding letters of intent
- Exclusivity granted — one buyer enters the final phase
- Full due diligence, definitive agreement, close
At step 7, the buyer has reviewed the CIM, met management, and started preliminary diligence. The advisor’s job is to convert buyer interest into a committed, well-structured offer that protects the seller’s position going into exclusivity.
M&A LOI Template: Key Sections
A complete letter of intent addresses these provisions:
1. Parties and Transaction Summary
Identifies the buyer entity, the target, and the nature of the proposed transaction — acquisition of shares, assets, or a merger. Includes a short summary of the deal concept.
Advisor note: Verify the buyer entity named in the LOI matches the entity with financing in place. Some buyers submit LOIs from a holding company or special purpose vehicle that differs from the fund or balance sheet that will fund the acquisition. Mismatched entities create complications in definitive documentation.
2. Purchase Price
The most important section. A well-constructed LOI specifies:
- Consideration type — cash, acquirer equity, or a combination
- Enterprise value or equity value — the basis for the offer, stated clearly (EV before net debt and working capital adjustments, or equity value post-adjustments)
- Working capital target — the assumed net working capital level at close, and the mechanism for adjusting the purchase price if actual closing NWC differs
- Earn-out structure — if contingent consideration is proposed, the LOI must specify the metric (revenue, EBITDA), measurement period, cap, payout timing, and dispute resolution mechanism
- Escrow or holdback — any portion of the price retained post-close to cover warranty claims or earn-out adjustments
Advisors should push buyers to present a specific price rather than a wide range. A buyer who submits an LOI with a $10M–$20M EV range after management presentations has not committed. The LOI stage comes after the buyer has met management and reviewed preliminary data — they have the information to name a number.
3. Deal Structure
How the transaction is structured has significant tax and liability implications for both parties. The LOI should address:
- Asset purchase vs. stock purchase — asset purchases allow buyers to step up the tax basis of acquired assets; stock purchases transfer liabilities with the entity. This is one of the most frequently negotiated points between legal teams, and it is far easier to resolve at the LOI stage than in the definitive agreement.
- Equity rollover — if the seller (typically management) is rolling equity into the combined entity, the LOI should specify the percentage, valuation basis, governance rights, and lockup terms.
- Earnout structure — if earnout provisions are included, advisors should insist on specific metrics, measurement periods, and caps at the LOI stage. LOIs that defer earnout mechanics to the definitive agreement create adversarial drafting situations where the buyer negotiates from an entrenched position after exclusivity has been granted.
4. Exclusivity Period
The exclusivity provision is typically the only fully binding economic provision in an M&A LOI. It restricts the seller from soliciting or negotiating with other buyers during a defined period.
Standard exclusivity periods by deal size:
| Deal Size | Typical Duration |
|---|---|
| Lower middle market (under $50M EV) | 30–45 days |
| Middle market ($50M–$250M EV) | 45–60 days |
| Upper middle market (over $250M EV) | 60–90 days |
| Complex or highly leveraged deals | 90–120 days |
Advisors should require that any extension beyond the base period be tied to defined milestones — completion of a specific diligence workstream, delivery of a commitment letter, or a specified board approval step — not granted automatically. Open-ended extension rights give buyers a free option to delay without consequence.
5. Key Conditions to Close
The buyer’s stated conditions for proceeding from LOI to definitive agreement. Common conditions include:
- Satisfactory financial and legal due diligence
- Receipt of financing commitments (for leveraged or sponsored buyers)
- Key employee retention agreements
- Third-party consents (material customer contracts, regulatory filings, landlord approvals)
- Material adverse change (MAC) provisions — defining what changes in the business would permit the buyer to exit or renegotiate
Advisor note: Broadly worded MAC provisions give buyers wide latitude to renegotiate or exit the deal post-exclusivity. Advisors should negotiate for specific, narrow MAC definitions — qualifying material changes must be quantified or fall into clearly defined categories to trigger the provision. General economic downturns, industry-wide events, and changes in financial markets should be carved out.
6. Due Diligence Timeline and Access
Specifies the expected diligence period (typically 45–90 days from exclusivity), scope of management access, facility visits, and IT access requirements for tech-enabled businesses.
7. Confidentiality
Confirms that the NDA signed before CIM access remains in force through the LOI process and post-termination, regardless of whether the deal closes.
8. Governing Law and Jurisdiction
Specifies which state or jurisdiction’s laws govern the LOI. This is binding even though the deal economics are not.
Binding vs. Non-Binding Provisions: The Critical Distinction
Every LOI should include an explicit designation of which provisions are binding and which are not. Ambiguity on this point causes disputes.
| Provision | Typical Status |
|---|---|
| Purchase price | Non-binding |
| Deal structure | Non-binding |
| Working capital target | Non-binding |
| Earn-out terms | Non-binding |
| Conditions to close | Non-binding |
| Exclusivity | Binding |
| Confidentiality | Binding |
| Governing law | Binding |
| Expense allocation | Binding |
| Break fee (if included) | Binding |
According to Deloitte’s M&A transaction research, disputes over binding versus non-binding LOI provisions are among the most common causes of early deal failure — and they are almost entirely preventable with clear drafting at the LOI stage.
The non-binding nature of the economic terms means that purchase price, structure, and conditions can and often do change materially during due diligence. This is why advisors treat the LOI price as a starting point, not a committed outcome, and maintain competitive tension through the LOI stage by working multiple buyers toward parallel submissions before granting exclusivity to one.
What Advisors Negotiate Before Countersigning
An experienced sell-side advisor does not countersign an LOI as submitted. The typical negotiation points:
Valuation gap. If the buyer’s price is below the seller’s expectations, the advisor should assess whether the gap reflects different assumptions about working capital, EBITDA normalization, or strategic value. Some gaps are resolvable through clarification or additional information; others reflect a fundamental disagreement on value that will not close in due diligence.
Exclusivity length. Advisors routinely push back on requests for 90+ day periods. A buyer who needs 90 days after management presentations and preliminary data room access to reach a definitive agreement is either uncertain about the transaction or planning to use the exclusivity period to re-trade. Propose 45–60 days with defined milestone-based extensions.
Earn-out mechanics. If an earn-out is proposed, require specifics on the metric, measurement period, cap, and payout triggers before granting exclusivity. An earn-out with undefined terms is not a real commitment — it is an option for the buyer to structure the earn-out favorably after exclusivity.
Financing conditionality. For financial sponsors, require evidence of financing credibility — a debt term sheet from a named lender or a confirmed equity commitment from the fund — before accepting an LOI with a financing condition. Sponsored buyers who cannot demonstrate financing readiness should not receive 60-day exclusivity.
MAC definition. The material adverse change provision governs when a buyer can exit the deal or renegotiate price after signing the LOI. Advisors should ensure MAC carve-outs exclude general economic conditions, industry-wide events, and changes in financial markets unless those changes disproportionately affect the target.
According to McKinsey & Company’s M&A research, sellers who enter exclusivity with vague LOI terms consistently achieve lower final deal values than those whose advisors enforced specificity at the LOI negotiation stage.
LOI to Definitive Agreement: What Remains to Be Negotiated
The LOI is a framework. The definitive purchase and sale agreement (PSA or SPA) is the binding contract. Between LOI signing and definitive agreement execution, the following are negotiated in detail:
- Representations and warranties — the seller’s factual statements about the business that survive closing and form the basis for indemnification claims
- Indemnification — who bears financial responsibility for breaches of reps and warranties, the cap, the basket/deductible, and the survival period
- Working capital mechanics — the exact target, reference balance sheet, and true-up procedures
- Closing conditions — specific, verifiable conditions each party must satisfy before close
- Escrow and holdback — amounts, duration, release triggers, and dispute resolution
Advisors who allowed LOI terms to be vague or one-sided often find themselves negotiating the deal economics from a position of weakness — after exclusivity has begun and competitive tension has been extinguished.
PwC’s M&A advisory practice notes that post-LOI renegotiation of terms that should have been resolved at the LOI stage is one of the most consistent sources of deal value leakage in middle-market transactions.
Related Resources
- Indication of Interest (IOI) in M&A — the non-binding first-round bid that precedes the LOI
- Letter of Intent (LOI) — Glossary Term — definition and key provisions reference
- M&A Share Purchase Agreement: Key Terms — the binding definitive document that follows the LOI and closes the transaction
- M&A Process Letter — the formal bid instructions document issued before the LOI round
- Exclusivity in M&A — the binding LOI provision that ends the competitive process
- M&A Deal Structure: Asset vs. Stock Sale — deal structure mechanics relevant to LOI negotiations
- Earn-Out in M&A: A Banker’s Guide — mechanics, metrics, and how to negotiate earn-out covenants before granting exclusivity
- M&A NDA: Confidentiality Agreements Explained — the document that precedes CIM distribution and remains in force through the LOI
- The Sell-Side M&A Process — full process overview from mandate to close
- M&A Deal Documents: Complete List — every document in the sell-side process
Frequently Asked Questions
What should an M&A letter of intent include?
An M&A LOI should include: purchase price (specific figure or tight range), deal structure (asset vs. stock sale, consideration mix), working capital target, earn-out provisions if applicable, exclusivity period and duration, key conditions to close, and confirmation that NDA confidentiality obligations remain in force. Binding provisions — exclusivity, confidentiality, governing law — should be clearly separated from non-binding deal economics.
How long is a typical exclusivity period in an M&A LOI?
Standard exclusivity periods run 45–60 days for middle-market transactions. Buyers frequently request 90–120 days for complex or highly leveraged deals. Advisors should resist periods beyond 60 days absent a clear justification: extended exclusivity reduces competitive leverage and delays the process if the preferred buyer walks away before close.
Is an M&A letter of intent legally binding?
Most M&A LOI provisions are explicitly non-binding — including purchase price, deal structure, and conditions to close. However, certain procedural provisions are typically binding: exclusivity, confidentiality, expense allocation, and governing law. The non-binding economic terms can change materially during due diligence, which is why advisors negotiate LOI terms carefully before countersigning.
When is an LOI issued in the M&A process?
An LOI is typically issued after management presentations — when a buyer has met the management team, reviewed preliminary data room materials, and formed a firmed-up view of value and structure. In structured sale processes, the sell-side advisor sends a process letter specifying the LOI format, required terms, and submission deadline before inviting final bids.
What is the difference between an IOI and an LOI in M&A?
An indication of interest (IOI) is a preliminary, non-binding signal submitted after CIM review, before management presentations. It typically includes a valuation range and broad deal structure. An LOI is submitted after management presentations and is more specific: a point price, defined deal structure, exclusivity request, and due diligence timeline. The IOI filters buyers into management presentations; the LOI moves one buyer into exclusivity.
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