Stephanie Quay · Founder & CEO, Five Experts · March 2026
Most acquisition models are built on a growth assumption. The business will improve under new ownership. Revenue will be more stable than it looks. The right operator will unlock the upside that was sitting there all along. These assumptions are often right. But the ones who actually realize them aren’t the ones who planned for growth after close. They’re the ones who built the foundation for it before.
The Setup
Growth doesn’t start at close. It starts in diligence.
The most common mistake searchers and independent sponsors make is treating diligence and post-close planning as two separate phases. Diligence is about protection , finding the problems, validating the numbers, getting lender comfortable. Post-close planning is about growth , building the 100-day plan, identifying the value creation levers, figuring out where to focus first. In practice, the window to do the growth planning well is exactly the same window as diligence. And most searchers use it almost entirely for protection.
The result is that they close on a business they understand financially and walk into a commercial picture they’re still figuring out. The first six months become the learning period that diligence should have been. And the growth that was baked into the acquisition model gets pushed out by a year while the new owner learns what the business actually is.
The searchers and independent sponsors who grow fastest post-close are the ones who already know the answer to the most important question before they sign: if the founder left the day after close, how much of this business would still be here in twelve months?
Answering that question , really answering it, not just noting it as a risk , is what separates diligence as a protection exercise from diligence as a growth planning tool. Everything that follows from it tells you what your first 90 days need to look like.
The Commercial Foundation
Commercial diligence is not a risk checklist. It’s a growth map.
Most searchers and independent sponsors approach commercial diligence, if they do it at all, as a way to validate the thesis rather than build it. They’re checking whether the revenue is as stable as it looks, whether the customer base is as diversified as the CIM suggests, whether the competitive position is real. That’s useful. But it’s only half of what commercial diligence can do.
Done well, the commercial workstream answers three questions that define your post-close trajectory. First, which customers are truly institutional relationships and which are personal to the founder? That answer tells you where your first 30 days need to be focused and what’s at risk if you don’t move quickly. Second, what is the real sales motion and what does it take to sustain it without the founder? That answer tells you whether you have a growth engine or a growth gap. Third, what are the actual value creation levers , not the ones in the CIM upside case, but the ones with real operational mechanisms behind them?
The question most CIMs don’t answer
Almost every LMM CIM includes an upside case. Almost none of them can be traced back to a specific, operational mechanism that would actually produce that growth. Knowing which levers are real before you close changes what you pay, what you plan for, and what you do on day one.
The businesses that grow fastest post-close are the ones where the new owner walked in already knowing the answers to these questions. Not guessing. Not hoping the CIM was right. Knowing , because someone who has done this before across dozens of LMM deals spent time in the data room and in direct conversations with customers and employees getting to the real picture before close.
The Operator Question
Know what the business actually needs from you in the first 90 days.
Most searchers have thought carefully about whether they can run the business. The question worth sitting with before close is slightly different: does your background match what this specific business needs during the transition, not just at steady state?
A founder-dependent business with fragile customer relationships and a team that has never been managed by anyone other than the founder is a particular kind of operating environment. The skills that matter most in the first 90 days are relationship continuity, trust-building under uncertainty, and the ability to establish credibility quickly without systems or structure doing the work for you. Those skills are learnable and many searchers have them. But it is worth being honest about where the gaps are before close rather than after.
The searchers who navigate transitions well tend to be the ones who mapped the specific demands of this business against their own experience before they signed, identified where they needed support, and had that support lined up before day one. That is not a sign of weakness. It is what good preparation looks like.
The Transition
Founder dependency is the risk that compounds fastest.
Every LMM business has founder dependency. The question is where it lives and how deep it runs. Searchers and independent sponsors who underestimate it don’t usually discover the problem in the first week. They discover it in month three when a key customer relationship goes quiet, or in month five when the operations that ran smoothly under the founder start showing gaps that nobody knew existed because the founder just handled them.
Identifying founder dependency before close is one of the most valuable things good commercial diligence does. But identifying it is only step one. The second step is building a transition plan around it , specific relationships that need to be introduced and handed over, institutional knowledge that needs to be documented, decisions that need to be transferred to someone who can make them without the founder in the room.
The founders who transition well are usually the ones who are structured around it. A clear timeline. Specific customer introductions on a schedule. A defined role during the transition period that doesn’t create confusion about who is running the business. Founders who stay involved informally and without structure almost always create drag rather than continuity, even when their intentions are good.
The transition plan is not a nice-to-have. It is the single most important operational document in the first 90 days. If it doesn’t exist before close, the first 90 days become the process of creating it in real time while also running the business.
The Plan
The 90-day plan that works is the one built before you close.
Most 90-day plans are written in the weeks after close, once the new owner has access to the full business and can see what they’re actually working with. That timing is understandable. It’s also the wrong approach.
The 90-day plan built after close is built on discovery. The 90-day plan built during diligence is built on evidence. The difference is that the first one starts from scratch. The second one starts from a commercial picture of the business that was assembled before you owned it, before the founder had any reason to manage the information, and before the pressure of running a business started competing with the time to think clearly about what needs to happen first.
What the diligence-informed 90-day plan actually looks like is specific, not generic. It names the three customers whose relationships are at risk in the first 30 days and the specific person responsible for each one. It identifies the two or three growth levers that are real and sequenced by what can be activated fastest. It has a founder transition schedule already agreed to before close. And it has a set of metrics defined in advance so the new owner knows at day 60 whether the plan is working rather than finding out at day 180.
1. Days 1 to 30: Stabilize with confidence, not guesswork
Because diligence identified the at-risk customer relationships before close, outreach is already mapped and underway. The founder transition schedule was agreed to before signing. The team knows who is in charge. What would normally be a reactive scramble becomes an orderly handoff because the risk inventory was built in advance.
2. Days 31 to 60: Validate what diligence found on the ground
The commercial picture assembled during diligence now gets tested against reality. Revenue assumptions from QoE get confirmed against actual customer behavior. The sales motion gaps identified before close get addressed with specific hires or process changes rather than discovered for the first time. Adjustments at this stage are refinements, not course corrections.
3. Days 61 to 90: Execute the plan you already built
By day 61 the growth levers are active because they were identified and sequenced before close, not discovered after. The team knows the year-one priorities. Reporting is in place. The business is being run, not learned. That is the difference diligence makes.
This is what the process looks like when the commercial foundation is built before close rather than after. Each phase moves faster because the previous one was informed by real evidence rather than best guesses. The first 90 days become a confirmation of what you already knew rather than a crash course in the business you just bought.
Work with Five Experts
We stay involved from diligence through the transition
Five Experts works with searchers and independent sponsors in the lower middle market. We provide commercial due diligence, deploy QoE specialists from our bench who understand LMM deal sizes and pace, and help you identify and place the right operator for your specific acquisition. We price our engagements for LMM deal sizes and we stay involved through the deal and into the transition. Most acquirers treat the commercial foundation as something to figure out after close. The ones who build it before are the ones who actually hit their year-one plan. If you are moving into LOI or working through a deal right now, reach out. The conversation is free.
Growth@FiveExperts.com
