Signing a letter of intent feels like a finish line because the buyer and seller have agreed on the main terms. Value, structure, timing, exclusivity, and core conditions are now in writing. The transaction finally looks real.
The LOI is not the end of the process. It is the start of the hardest stretch. After signing, the deal moves into exclusivity, due diligence, purchase agreement negotiation, financing checks, closing logistics, and transition planning.
This is where many transactions either become more solid or begin to weaken. The buyer gets deeper access to the business. The seller has to keep operating while answering detailed requests. Both sides learn whether the terms in the LOI can survive real evidence.
What the LOI Actually Says
A letter of intent is usually three to six pages. It sets out the purchase price or valuation range, transaction structure, expected closing timeline, diligence requirements, financing assumptions, and the path toward a signed purchase agreement.
The exclusivity window is one of the most important terms. It usually lasts sixty to ninety days and gives the buyer time to complete due diligence without competing against other buyers. During that period, the seller usually cannot solicit or negotiate with another buyer.
Many LOI terms are non-binding, but non-binding does not mean unimportant. Value, working capital expectations, earnout structure, seller financing, transition involvement, and representations and warranties insurance can all shape the final economics.
The practical rule is simple. Every term in the LOI should be treated as the starting point for the final deal. If a term is vague, the purchase agreement will have to clarify it later, often when both sides are tired and more protective.
What Happens in Exclusivity
Once the LOI is signed, the buyer begins formal due diligence. This is a structured review of the business across financial, legal, commercial, operational, tax, HR, technology, and industry-specific issues.
The buyer will submit a due diligence request list. It may ask for three to five years of financial statements, tax returns, customer contracts, supplier agreements, employee information, leases, debt schedules, insurance policies, intellectual property records, and system access documentation.
A due diligence checklist helps both sides separate required documents from nice-to-have requests. It also makes the response process easier to manage when several advisors are asking questions at the same time.
The seller's response quality matters. A clean data room builds buyer confidence. Slow, incomplete, or inconsistent responses create doubt, even when the underlying business is strong.
This period also brings in outside advisors. Accountants may run a quality of earnings review. Attorneys will check contracts, corporate records, employment matters, and legal exposure. Lenders may ask for their own documentation. Every advisor creates another set of questions.
How Findings Affect the Deal
Diligence rarely confirms every LOI assumption cleanly. The buyer may find customer concentration risk, margin pressure, undocumented addbacks, weak contracts, employee classification issues, aging receivables, related-party expenses, or inconsistent revenue recognition.
A finding does not automatically kill the deal. Minor findings can be resolved through documentation or management explanation. Moderate findings may change working capital, purchase price, seller financing, earnouts, holdbacks, or indemnification terms.
Material findings are different. If the buyer discovers a fact that changes the business's risk profile, the buyer may renegotiate the deal terms or walk away. This is why the post-LOI period is not just administrative. It is where the buyer tests whether the LOI was based on a true picture of the business.
Preparation changes the tone of this phase. A seller who already understands the weak points can answer directly. A seller who discovers problems alongside the buyer loses control of the narrative.
The Path to the Purchase Agreement
As diligence progresses, the attorneys begin drafting and negotiating the purchase agreement. This document turns the LOI into a binding transaction. It defines exactly what is being sold, what the buyer is paying, what conditions must be satisfied, and what happens if a representation proves inaccurate after close.
The purchase agreement is where many important issues become specific. Representations and warranties, indemnification caps, baskets, survival periods, closing conditions, working capital mechanics, non-compete obligations, transition support, and post-closing covenants all need to be negotiated.
This negotiation can slow the deal if the LOI left too much unresolved. A vague LOI creates room for disagreement later. A clear LOI strategy reduces the number of economic fights that show up during documentation.
The buyer and seller should expect the purchase agreement phase to feel more technical than the LOI. That is normal. The stakes are higher because this document controls obligations after closing.
What Still Has to Happen Before Closing
Signing the purchase agreement may happen at closing, or it may happen shortly before closing with conditions still outstanding. The exact sequence depends on the deal structure, financing, regulatory needs, and closing mechanics.
Before closing, the parties usually confirm financing, finalize working capital estimates, collect third-party consents, prepare funds-flow documents, sign ancillary agreements, resolve final diligence questions, and coordinate the formal transfer of ownership.
This is also when small operational details become important. Payroll cutoff dates, insurance binders, customer assignment notices, vendor access, bank signature authority, and system permissions can all create friction if they are handled at the last minute.
The seller also needs a transition plan. Key employees may need carefully timed communication. Customers may need to be notified after close. Systems access, bank accounts, payroll, insurance, vendor relationships, and reporting rhythms all need a Day 1 plan.
For lower middle market transactions, the time from signed LOI to close is often sixty to ninety days. Clean data rooms, prepared advisors, responsive communication, and clear phase gates are what keep that timeline from slipping.
How to Protect Momentum After the LOI
Momentum after the LOI depends on discipline. The seller should have one source of truth for diligence requests, one owner for response coordination, and one advisor team aligned on what can be shared at each stage.
The buyer should keep requests focused on decisions. Asking for every document imaginable slows the process and creates noise. A better diligence process connects each request to a specific risk, valuation question, closing condition, or purchase agreement term.
Both sides should hold regular check-ins. Short weekly calls can surface blockers before they turn into frustration. Silence during exclusivity is rarely neutral. It usually means questions are piling up somewhere.
A simple status rhythm also protects the relationship. Open items should be grouped by owner, deadline, and deal impact. If an item could affect price, structure, financing, or closing conditions, it should be escalated early instead of buried inside a request tracker.
A useful acquisition playbook gives buyers and sellers a clearer map of the post-LOI process. It does not remove negotiation, but it helps both sides understand what each phase is supposed to prove.
The Practical Takeaway
The LOI is an important milestone, but it is not a closed deal. The transaction still has to survive diligence, documentation, financing, closing mechanics, and transition planning.
The best prepared sellers enter exclusivity with clean materials, known risk points, and a realistic view of what buyers will test. The best prepared buyers enter with a clear diligence plan, strong LOI strategy, and discipline around which findings should affect deal terms.
The post-LOI phase rewards preparation. The cleaner the evidence, the fewer surprises emerge. The clearer the LOI, the fewer issues are left for the purchase agreement. The better the closing plan, the easier ownership transfer becomes.
That preparation also protects trust. When the process is organized, both sides can focus on the few issues that actually matter instead of burning energy on avoidable confusion.
A signed LOI creates the path. The work after the LOI determines whether the deal reaches the end of it.
