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Decision-Grade Review
Deal Process
Feb 6, 2026 · 15 min read · Sorai Editorial · M&A Diligence Research · Updated Mar 30, 2026
The path from LOI to close is where diligence findings, agreement terms, consents, and financing have to line up. This guide explains the execution phase that decides whether deals actually finish.
Quick answer
The LOI-to-close phase is the most execution-heavy part of any M&A process because diligence, negotiation, financing, and closing conditions all have to progress together. Boston Consulting Group reported that large announced deals averaged 191 days from announcement to close in 2024, which helps explain why execution discipline matters so much once exclusivity begins. The real challenge is not only finishing the work, but keeping the workstreams aligned as the facts change.
The most delicate part of a transaction usually begins after the LOI is signed. Before that point, the deal still lives mostly in thesis, strategy, and preliminary analysis. After that point, the work turns operational. Diligence has to move quickly, agreement terms have to reflect the facts as they emerge, financing and consent processes have to stay on track, and the buyer has to convert a working hypothesis into a real closing package.
That is why LOI-to-close execution is where many deals either stabilize or start to slip. Boston Consulting Group reported that large announced deals averaged 191 days from announcement to close in 2024, and about 40 percent missed their announced close timing [Boston Consulting Group, "The 2024 M&A Report: Deals Are Taking Longer to Close. How to Respond.", 2024]. Those figures are a useful reminder that even after a transaction is announced to the market, the execution path remains fragile. In a private process, the same truth usually applies before the world ever sees the deal.
An LOI does not remove uncertainty. It changes the cost of uncertainty.
Once the LOI is signed, the buyer often enters exclusivity, narrows its room to maneuver, commits more advisor spend, and creates momentum internally. The questions that were earlier strategic become immediate process risks:
The execution phase is therefore less about discovering whether a business is interesting and more about proving whether the transaction can close on acceptable terms.
The first step after LOI is not simply "start diligence." It is to reset the process around the work that now controls the path to close.
That usually means making four things explicit right away:
Financial, legal, tax, commercial, financing, and integration-related decisions all have to move together. If one of those tracks is treated as secondary, the timeline eventually reflects it.
The buyer should already know which questions could still change the economics, structure, or closing certainty. Those questions should become the organizing logic of the post-LOI process.
The team needs more than a generic closing date. It needs interim decision points such as initial issue escalation, draft agreement timing, major diligence turning points, lender deadlines, and consent work.
Execution slows down when issues are everyone's problem and no one's task. The cleaner the ownership model, the better the process moves.
The post-LOI diligence phase is where the deal team has to absorb the most information in the shortest time. This is usually where the process feels busiest, but the real challenge is not only document volume. It is preserving coherence while the findings come in.
This workstream pressure-tests revenue quality, margin durability, cash conversion, working capital behavior, debt-like items, and the quality of management's adjustments. The timeline risk is not just slow analysis. It is late discovery of issues that should have been escalated earlier into pricing, structure, or protection terms.
Legal review is often where transferability, consent rights, unusual liabilities, litigation exposure, and governance issues emerge. These findings matter disproportionately because they can affect both the certainty and timing of close.
Tax review often reveals structural complexity that changes the transaction mechanics. Exposure does not have to be catastrophic to be timeline-relevant. If it affects purchase form, indemnity design, or disclosure requirements, it can still slow the process materially.
The hardest issues rarely sit in only one workstream. A contract-transfer issue may affect revenue durability. A tax structure issue may affect how the agreement is drafted. A working-capital question may become one of the central negotiating points. If the workstreams stay isolated, the deal loses momentum because the team has to explain the same story multiple times in different formats.
Bain's 2025 Global M&A Report is useful context here because it reinforces how much transaction quality depends on preparedness and disciplined execution, not only on finding attractive assets [Bain & Company, "2025 Global M&A Report," 2025].
Many teams think of diligence and agreement negotiation as separate phases. In practice, the best execution processes overlap them. Once material issues surface, the transaction documents have to respond.
That translation work usually concentrates around a few high-impact areas.
If diligence changes the buyer's view of earnings quality, net debt, or working capital behavior, that usually affects how the economics should be framed. Those changes do not always lead to headline repricing, but they often influence the adjustment mechanics and the protections the buyer wants at close.
The agreement has to reflect the actual risk profile of the business, not the generic form. Diligence only creates value if the facts it uncovers actually influence the legal protections and disclosures.
Certain issues are broad business risks. Others are specific enough that the buyer may want narrower, more explicit protection. That distinction often becomes one of the main negotiation battlegrounds.
Some diligence issues do not change price. They change what must happen before the deal can close or what commitments the seller must make along the way.
This is where LOI-to-close execution becomes particularly sensitive. If the parties waited too long to expose these issues, the agreement stage absorbs the delay. If the issues were escalated early, the negotiation is still difficult, but it is less likely to become chaotic.
Even a strong purchase agreement draft does not close the deal by itself. Several execution tracks often sit beside the main negotiation and can still control timing.
Map the process
Sorai is built for teams that need financial, tax, and legal diligence to stay aligned before the final memo sprint.
Some counterparties need to consent before the asset can transfer cleanly. If the team identifies those needs late, the delay can be severe because the consent process may not be fully within either party's control.
Depending on the transaction, regulatory review may be routine or highly material. Either way, it cannot be treated as an afterthought because the timing risk is often outside the immediate control of the buyer and seller.
If the transaction depends on lender work, commitment terms, or other funding mechanics, the execution timeline has to include those dependencies explicitly. It is not enough for financing to exist conceptually. It has to be documented, sequenced, and synchronized with the rest of the process.
Disclosure schedules, adjustment statements, support agreements, and other closing materials take real time. Teams frequently underestimate how much coordination these items require late in the process.
As the deal approaches close, the work becomes more about readiness than discovery. The questions change again:
The better-run transactions treat close as a managed sequence, not a ceremonial finish line. That means fund flows, approvals, signatures, filings, schedules, and internal decision checkpoints are prepared with the same rigor as the earlier diligence work.
The process does not become irrelevant the moment the deal closes. Post-close adjustments, working-capital true-ups, transition services, and early integration actions still depend on how well the pre-close record was built.
If the purchase-price mechanism is vague, if the diligence record is fragmented, or if issue ownership was unclear before close, those weaknesses usually show up immediately afterward. The best teams think about that before the closing date, not after it.
The specific issue changes from deal to deal, but the recurring patterns are familiar.
If the buyer signs the LOI before identifying the few issues most likely to matter, the post-LOI process becomes broader and slower than it should be.
A large issue list is not the same thing as decision support. Teams lose time when everything is important and nothing is clearly ranked.
If diligence findings are not translated into legal and economic positions early enough, the agreement phase expands under pressure.
Consent requirements, financing details, and structural complexities cause the most damage when they surface after the rest of the process has already accelerated.
Execution degrades when legal, finance, tax, and senior decision-makers are all working hard but not from the same record.
AI does not eliminate the hard parts of post-LOI execution. It does not negotiate the agreement, obtain consents, or satisfy closing conditions. What it can do is reduce the informational drag inside the process.
McKinsey's 2026 work on GenAI in M&A is most useful when read as a workflow argument: the benefit comes from embedding AI into the parts of the process where research, synthesis, and issue escalation are slowing teams down [McKinsey & Company, "Gen AI in M&A: From theory to practice to high performance," January 2026]. Deloitte's 2025 M&A generative AI study points to the same real-world direction, with firms adopting GenAI inside M&A workflows rather than only in isolated experiments [Deloitte, "2025 GenAI in M&A Study," 2025].
The strongest uses during LOI-to-close execution are usually:
AI can help classify materials, pull recurring fields, highlight exceptions, and preserve evidence links across large diligence sets.
The team moves faster when findings from different workstreams can be summarized, linked, and escalated without repeated manual translation.
If evidence, reviewer comments, and issue ownership remain connected, the team spends less time rebuilding the story between diligence, agreement drafting, and senior review.
The cleanest transactions usually share the same characteristics:
This is what makes the difference between a process that feels busy and a process that is actually under control.
Sorai is built for the operating record between evidence gathering and senior review. In an LOI-to-close process, that matters because momentum is lost every time the team has to reconstruct what was found, what it means, who owns it, and what happens next. Keeping evidence, issue ownership, and review context connected helps reduce that drag across diligence, negotiation, and closing preparation.
LOI-to-close execution is where a transaction stops being mostly strategic and becomes fully operational. The buyers who run this phase well do not just work harder. They make dependencies explicit, keep the workstreams aligned, and translate findings into decisions quickly enough to preserve momentum on the path to close.
Sources cited
Author
Editorial review team for Sorai's public diligence content
The editorial team translates public primary-source research and Sorai's workflow perspective into material designed for private equity, corporate development, and transaction advisory readers.
Frequently asked questions
After the LOI, the buyer moves through full diligence, agreement negotiation, financing and consent work, closing preparation, and then post-close adjustment mechanics. This is the phase where the transaction shifts from thesis testing to execution discipline.
Exclusivity periods vary by process, but the important point is that they compress time for the buyer once signed. The buyer now has to finish diligence, negotiate the agreement, satisfy closing conditions, and maintain internal conviction before that window expires or has to be extended.
Deals most often stall when a core diligence issue changes the economics, when agreement terms cannot be reconciled, when a consent or regulatory dependency proves harder than expected, or when financing and execution readiness fall out of sync.
A working capital mechanism is the purchase-price adjustment framework that compares a target or peg to actual working capital at closing. It matters because it converts diligence findings and accounting definitions into real closing economics.
Yes, especially in document-heavy diligence and cross-workstream coordination. AI can accelerate review, synthesis, and escalation, but it does not replace negotiation, approvals, lender work, or third-party consent processes.
Go deeper
Use the service pages below to review how Sorai supports pre-LOI screening, full diligence, and review-readiness across the deal cycle.
Relevant workflow
Review the early-confidence workflow for screening before full diligence cost is committed.
Relevant workflow
See the shared operating record that connects evidence, owners, and review decisions.
Relevant workflow
Understand how Sorai supports the financial workstream once the deal moves into full verification.
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Pre-LOI due diligence helps buyers test the deal thesis, identify the highest-risk issues early, and decide whether to proceed, pause, or narrow the scope before exclusivity begins.
Financial DD
Net working capital determines the purchase price adjustment at closing. Covers NWC definition, normalization, peg negotiation, and the true-up mechanism that protects both parties.