What Is a CIM? How to Read the Book on a Business for Sale

A CIM — confidential information memorandum, the "book" in deal slang — is the 30–80 page document a broker writes about a business for sale, handed to buyers after they sign an NDA. It's part prospectus, part sales brochure: company history, operations, staff, financials recast to show true owner earnings, a growth story, and the case for the asking price. Read it the way you'd read a dating profile written by the person's mother. The facts are mostly real. The lighting is professional.

What's in the book, section by section

The executive summary gives you the shape of the deal in two pages — revenue, earnings, price, reason for sale. The business overview covers history, products, customers, suppliers, staff and lease. Then come the recast financials: three to five years of P&L, adjusted to show SDE or adjusted EBITDA — the earnings a new owner would actually enjoy. A growth section explains what the seller would do with the business if only they weren't selling it (a genre with its own dry comedy), and the package closes with deal structure and price rationale.

Everything hangs on the recast. The median Main Street business sells around 2.7× cash flow, so each dollar of claimed earnings is roughly three dollars of asking price. Which brings us to the one table worth reading twice.

The add-back table: where price is manufactured

Add-backs are expenses on the tax return that supposedly won't apply to you: the owner's salary, their health insurance, the family truck, one-time legal bills. Legitimate recasting is standard and fair. But every soft add-back inflates the price at 3×, and advisory firms report buy-side reviews commonly trim claimed earnings by 10–30%. The classic tells: "one-time" expenses that appear every year, a relative on the payroll doing real work for token pay, and rent from an owner-owned building booked below market.

Sources: Breakwater M&A; Axial, Dead Deal Report; BizBuySell Insight Report, Q2 2026.

The other two pages that decide everything

Customer concentration hides in the business overview, often as a cheerful pie chart. If one customer is 35% of revenue, you're not buying a business, you're buying a relationship you don't have yet. Check whether the top accounts are under contract, for how long, and whether they're loyal to the company or to the departing owner personally.

Owner dependence is the quieter killer. Read the staff table against the story: if the owner is the top salesperson, the chief estimator, and the only one with the supplier relationships, then the earnings you're buying walk out the door at closing. The CIM will phrase this as "opportunity for a hands-on operator." Translate accordingly.

When Axial autopsied 75 broken LOIs, diligence findings (25.3%) and earnings discrepancies (21.3%) together explained 46.6% of dead deals — mostly things a careful CIM read would have flagged before anyone signed anything. The CIM is where you form the suspicions that due diligence and a quality of earnings review later confirm or clear.

Reading it like a pro: a 90-minute method

First pass, 15 minutes, no judgment: read the executive summary and flip every page so the shape sinks in. Second pass, an hour, with a highlighter and the actual financial statements side by side: tie the recast table to the P&L line by line, circle every add-back you'd have to defend to a lender, and mark every claim with no number attached ("strong recurring revenue" — how much, from whom, under what contract?). Third pass, 15 minutes, write the question list for the broker. Numbered questions get numbered answers; vague unease gets a sales call.

Two last calibrations. A thin or sloppy CIM isn't automatically a bad business — it's usually a signal about the broker who wrote it, which matters if you'll be negotiating through them for the next four months. And a gorgeous CIM isn't automatically a good business; it's evidence the seller paid for good packaging. The quality of the book and the quality of the business are two different facts. Buyers who keep them separate — and sellers who hire brokers capable of producing an honest, rigorous book — are both reading this page for the same reason.

Frequently asked questions

What does CIM stand for in business sales?

Confidential Information Memorandum — the 30–80 page book a broker prepares on a business for sale, shared after you sign an NDA. Also called the "deal book" or "offering memorandum."

Is the information in a CIM reliable?

Treat it as an informed sales brochure. The raw numbers usually trace to real books, but the recast earnings include add-backs ranging from solid to hopeful. Diligence and a QoE review exist to test them.

What should I look at first in a CIM?

The add-back table, customer concentration, and owner dependence. Those three decide whether the headline earnings — and the price built on them — survive scrutiny.