7 Reasons You Need an M&A Attorney Before Signing an LOI

Most first-time buyers treat the letter of intent like a formality. They negotiate the headline price, sign the LOI, and plan to "bring in a lawyer later" for the purchase agreement. By the time they do, the deal is already shaped. The exclusivity clock is running. The structure is set. The provisions they should have negotiated are now locked in as the baseline for the definitive agreement.

This is not a theoretical problem. It is the single most common mistake in mid-market acquisitions. The LOI does not just state the price. It establishes the framework for everything that follows: deal structure, timeline, due diligence scope, and which terms the buyer can still negotiate.

Here are seven specific reasons why engaging an M&A attorney before signing the LOI is not optional. It is the single highest-return decision in the acquisition process.

Buyers assume the purchase agreement is where the real negotiation happens. In practice, the LOI establishes the framework that the purchase agreement builds on. Purchase price, deal structure (asset vs. stock), earnout parameters, exclusivity period, and due diligence timeline are all set at the LOI stage.

Once signed, renegotiating these terms requires leverage you no longer have. The seller granted exclusivity based on the LOI terms. Changing the structure mid-stream signals that the buyer is either unsophisticated or negotiating in bad faith. Neither perception helps.

An M&A attorney reviews the LOI before you sign it and negotiates the provisions that will define your entire transaction. This is the moment where the deal economics are actually determined.

LOIs typically include an exclusivity (no-shop) provision that prevents the seller from negotiating with other buyers for a specified period. This benefits the buyer in principle. In practice, poorly drafted exclusivity can trap you.

If the exclusivity period is too long (90+ days without milestones), you are locked into a single target while the seller controls the pace of due diligence. If the provision lacks conditions for extension, you may run out of time and lose your exclusivity without completing diligence. If there is no mechanism to terminate exclusivity when the seller fails to cooperate, you are stuck.

M&A counsel structures exclusivity with appropriate duration (typically 45-60 days), milestone-based extensions, and termination rights that protect the buyer's ability to walk away.

The LOI is commonly described as "non-binding." This is misleading. While the purchase price and most deal terms are typically non-binding, several critical provisions are binding and enforceable from the moment you sign.

Exclusivity is binding. Confidentiality obligations are binding. Expense reimbursement provisions (which may require you to cover the seller's legal costs if you walk away) can be binding. Some LOIs include binding standstill provisions, non-disparagement clauses, or even break-up fees.

Without M&A counsel reviewing the LOI, buyers frequently sign binding obligations they did not intend to accept. The cost of unwinding these commitments. much higher than the cost of having counsel review the document before signing.

Asset purchase vs. stock purchase is not just a legal distinction. It determines your tax basis, depreciation schedule, and total after-tax cost of the acquisition. In an asset purchase, the buyer gets a stepped-up tax basis on acquired assets, generating depreciation deductions that reduce taxable income for years. In a stock purchase, the buyer inherits the seller's tax basis.

The LOI is where deal structure gets defined. If the LOI specifies a stock purchase because the seller prefers it, changing to an asset structure after signing requires significant renegotiation. The tax difference on a $5M acquisition can easily exceed $500K over the depreciation period.

M&A counsel coordinates with your CPA to determine the optimal structure before the LOI is signed, ensuring the deal economics work for both parties from the start.

The LOI typically defines the scope and timeline for due diligence. If the scope is too narrow, you may not discover critical issues until after closing. If the timeline is too short, you rush through diligence and miss problems.

M&A counsel ensures the LOI includes comprehensive due diligence rights covering financial records, legal matters, contracts, intellectual property, environmental issues, employee matters, and regulatory compliance. The LOI should also include the seller's obligation to provide access to records, facilities, and key employees during the diligence period.

Without these provisions in the LOI, buyers find themselves negotiating access to information they should have had automatically. This delays the deal and creates friction that can derail it entirely. See our complete due diligence guide for the full framework.

When the purchase price includes an earnout component, the LOI is where the measurement framework gets established. What metrics determine the earnout payments (revenue, EBITDA, customer retention)? Over what period? Who controls business operations during the measurement period? What happens if the buyer restructures the business in ways that affect the metrics?

These questions must be addressed at the LOI stage. Waiting until the purchase agreement creates disputes that can kill the deal. A $3M acquisition with a $1M earnout tied to revenue targets sounds straightforward until the buyer realizes the seller defined "revenue" differently than the buyer intended.

M&A counsel defines the measurement mechanics, accounting standards, dispute resolution process, and the buyer's operational obligations during the earnout period. This protects both parties and prevents the earnout from becoming a post-closing litigation issue.

M&A legal fees for a mid-market acquisition typically represent 1-3% of the deal value. A single poorly negotiated LOI provision can cost far more.

An overbroad non-compete that restricts the buyer's key employee from working in the industry for five years instead of two. A working capital adjustment mechanism that lets the seller extract $200K at closing. An exclusivity period that wastes three months on a deal that should have been killed after week two. An earnout formula that makes the contingent payment unachievable.

Each of these outcomes is preventable. Each costs more than the total legal fees for the transaction. The decision is not whether to hire M&A counsel. It is whether to hire them before the LOI or after, when the damage is already done.