The First 100 Days After You Buy a Business

Acquisition entrepreneurs spend months on sourcing, valuation, diligence, and deal structure. Then they close, walk into the building on Monday morning, and discover that none of that work told them what to do next.

This is where deals actually break. The purchase price was reasonable, the seller note was fair, the financials checked out — and then the top salesperson quits in week three, the largest customer calls to "check in on the transition," and the operations manager who really ran the place starts updating her resume. The business you underwrote is not the business you own if the people who made it work decide to leave.

The first 100 days is a specific, manageable problem with a repeatable framework. Here is how to run it.

The Governing Principle: Earn the Right to Change Things

The single most common mistake first-time buyers make is arriving with a plan. You spent six months building a thesis about what this business could become, and you are eager to execute it. Resist that for 90 days.

Every employee, customer, and vendor is running the same calculation in their head: is this new owner going to make my life worse? Every change you make in the first month is read as evidence for "yes." Every week you leave things stable is evidence for "no." Stability early buys you enormous latitude later.

This does not mean doing nothing. It means separating learning from changing, and doing all of the first before any of the second.

Days 1-14: Presence and Retention

Announce it correctly, and announce it once. Employees should hear about the sale from the seller, with you standing beside them, in a live all-hands — not from a customer, a rumor, or an email. The seller does the talking. The message is short: I sold the business, here is who bought it, here is why I chose them, I am staying on through the transition. Your part is briefer still: I am not here to change what works, your jobs are secure, and I will be talking to every one of you this week.

Interview every employee individually. In a business under 50 people, do all of them inside two weeks. Four questions, same four every time: What do you do here that nobody else knows how to do? What is broken that you have wanted to fix for years? Who are the customers you personally worry about? What would make you leave?

That last question is not rhetorical. Write down the answers. You are building a retention map and a problem inventory at the same time, and you are doing it in the only window where people will speak candidly — before they have formed an opinion about you.

Lock in the key people immediately. Diligence should have identified the two or three employees whose departure would materially impair the business. Within the first two weeks, have a direct conversation with each: here is your role going forward, here is a retention bonus payable at 12 months, here is what growth looks like for you under new ownership. Do not wait for them to come to you. By then they have already interviewed somewhere else.

Days 15-45: Customers, Cash, and Controls

Call the top 20% of customers personally. Concentration risk is the quiet killer in small-business acquisitions. If your top five accounts are 40% of revenue, those five phone calls are the most important work you will do all quarter. Bring the seller on the call when you can. The framing is simple: nothing about your service, pricing, or point of contact is changing, and here is my direct cell number.

Take control of cash before anything else. Within the first month, you should personally own: bank account signature authority, the approval threshold for outgoing payments, the weekly cash flow report, and the AR aging. You do not need to redesign the accounting system. You need to know, every Friday, how much cash came in, how much went out, and what is owed to you.

Build the 13-week cash forecast. If you used a seller note, an SBA loan, or any structured financing, debt service is now a fixed weekly obligation against a business whose cash cycle you do not yet understand. A rolling 13-week forecast is the single most useful operating document in the first year. It surfaces problems while they are still small enough to fix.

Days 46-100: The Seller Handoff and the First Real Changes

Extract the undocumented knowledge. The seller's transition period is a wasting asset, and most buyers waste it. Build an explicit list of what only the seller knows: the vendor who gives informal terms, the customer whose contract renews on a handshake, the pricing exception nobody wrote down, the regulatory inspector who visits every March. Work through it in scheduled weekly sessions with a written agenda, not casual conversation. Assume the seller is fully gone at day 100 even if the agreement says otherwise.

Pick one change and make it well. Somewhere in your employee interviews, the same complaint came up four or five times. That is your first change. Not the one from your investment thesis — the one your team already told you about. Fix it, credit the employees who raised it, and let the organization watch the new owner solve a problem they cared about. That single move buys more credibility than a year of good intentions.

You do not take control of a business by making decisions. You take control by understanding it well enough that your decisions are obviously right to the people who have to execute them.

The Scoreboard

At day 100, four numbers tell you whether the transition worked: employee retention (target: 100% of the people you flagged as key), customer retention among the top 20% of accounts, actual cash flow against the model you underwrote, and whether you can now answer any operational question without calling the seller.

If those four are intact, the acquisition worked and everything after this is optimization. If one of them is broken, fix it before you touch anything else — a growth plan built on a business that is quietly losing its people or its customers is not a growth plan.

The deal is not done at closing. Closing is the moment the real work starts, and the first 100 days determine whether you bought an asset or a problem.

For the complete acquisition framework — sourcing, structuring, financing, and transition — get your copy of Creative Acquisitions. Related reading: the Due Diligence Checklist, the Earn-Out Structure, and the Holdco Model.

Connect with Dr. Connor Robertson on drconnorrobertson.com, LinkedIn, Substack, Medium, and X. Additional acquisition resources and the Pittsburgh business community are at The Pittsburgh Wire.