Somewhere between 60 and 70 percent of acquisitions fail to deliver expected returns. That number hasn’t moved much in 30 years, despite better financial models, sharper legal reviews, and more polished integration playbooks.
The reason is almost always commercial, not financial. Not the P&L—transaction advisors stress-test that six ways from Sunday. The problem is the assumptions underneath the P&L. Customer retention projections that don’t hold up. Competitive positioning that erodes faster than expected. Market growth that was real at the macro level but irrelevant to the target’s actual segments.
Commercial due diligence exists to catch those gaps. And in my experience, buyers either skip it or rush through it in a way that misses the point entirely.
What CDD Is Actually Trying to Answer
One question: Is this company’s commercial position as solid as the seller says it is?
That question breaks into five pieces.
Market Reality
The seller’s deck says the market is growing 12% annually. Maybe. But is the target’s specific sub-segment growing? Or is growth concentrated in areas the target doesn’t serve?
I’ve worked on deals where the “fast-growing market” story was technically true at the industry level, but the target’s niche was actually shrinking. The seller framed the macro trend as relevant. It wasn’t.
Customer Durability
Revenue looks strong. But dig in. If three customers make up 60% of revenue, what happens when one gets acquired, changes strategy, or decides to bring the capability in-house?
And why do customers stick around? Is it because the product is genuinely superior? Or is it because switching is painful and inertia is doing the work? The second scenario looks like loyalty on a spreadsheet. It’s actually a vulnerability—the moment someone makes switching easy, those customers are gone.
Competitive Positioning
What keeps competitors out? IP? Relationships? Regulatory barriers? Scale economics?
In a lot of deals, the supposed moat is thinner than the seller’s pitch suggests. A competitor is working on similar technology. A regulation is about to change. A key customer is building an internal alternative.
Growth Plan Plausibility
Sellers present projections. CDD tests whether those projections are connected to reality.
Target claims 25% growth next year by expanding into Europe. Fine—has anyone confirmed that European buyers want this product? At this price? Through the distribution model being proposed?
This overlaps with market entry analysis. You’re essentially asking: can this company execute its growth plan in the projected timeframe, or is the buyer paying for growth that won’t show up?
Pipeline Integrity
The deck shows $15M in “probable” deals closing within 12 months. CDD independently checks a sample.
We’ve seen pipelines that included conversations from 18 months ago with no recent follow-up. Prospects who had no budget authority. “Handshake agreements” that were actually polite interest with zero commitment behind them.
What CDD Is Not
It’s not financial due diligence—no balance sheet reviews, financial audits, or tax assessments.
It’s not legal due diligence—no contract reviews, litigation analysis, or IP ownership verification.
CDD lives in the space between the numbers and reality. The financials say revenue grew 15% last year. CDD asks why, whether it’s repeatable, and what risks are hiding in places the P&L doesn’t show.
Three Things Buyers Routinely Miss
The Relationship Layer Behind the Revenue
Every B2B company sits inside a commercial ecosystem—a web of referral relationships, intermediaries, and influence patterns.
CDD should map this, not just the direct customer connections. Who sends business to the target? Which consultants recommend them? What happens to referral-driven revenue if a key relationship shifts?
We worked on a deal where 40% of new business flowed through 3 industry consultants who recommended the target to end customers. The seller never disclosed this—not because they were hiding it, but because they’d never thought of it as material. It was very material. If any of those consultants retired or switched loyalties, the new-business pipeline would crater.
The Interview Gap
Most CDD includes customer interviews. The quality range is enormous.
Lazy approach: call 5 references the seller hand-picks. Ask generic satisfaction questions. Get glowing responses because the seller chose their happiest clients.
Thorough approach: independently identify 15-20 customers, including churned accounts and prospects who chose a competitor. Ask pointed questions about switching intent, competitive alternatives they’re evaluating, pricing pressure, and unmet needs.
The distance between what reference customers say and what a broader sample reveals is often the distance between a good deal and a disaster.
Competitive Response
Buyers study today’s competitive landscape. They almost never model what competitors will do after the deal closes.
Acquisitions are public. Competitors notice and react. Sometimes they accelerate R&D. Sometimes they slash prices. Sometimes they poach key employees or destabilize customers during the messy integration period.
Good CDD includes a competitive response scenario—not just “who competes today?” but “how will the competitive landscape shift when this deal is announced?”
Timing Problems
CDD happens during the buyer’s due diligence window—usually 4-8 weeks between LOI and close.
The trap: that window is packed. Financial, legal, tax, IT, HR, and commercial diligence all compete for the same 4-8 weeks of attention. CDD regularly gets squeezed to 2-3 weeks because the financial work ran long.
Two weeks is not enough. Customer interviews alone take 2-3 weeks to schedule and execute properly.
The fix: start pre-CDD market research before the LOI. Build the competitive landscape, market analysis, and preliminary customer mapping before you have access to the data room. When the LOI is signed, you’re 60% complete and can spend the remaining time on work that requires the seller’s cooperation.
What Good CDD Delivers
Four answers:
Is the revenue base durable? Not “will revenue grow” but “will what’s already here hold?” Customer concentration risk. Competitive threats. Technology shifts.
Is the growth plan grounded? Can the target execute its projections given real market conditions and operational constraints?
What risks didn’t the seller disclose? Usually not intentionally hidden—just normalized. They’ve been managing around the risk for years, so they don’t see it anymore.
What’s the realistic revenue trajectory after you close? Accounting for integration disruption, competitive response, and customer anxiety during the ownership transition.
Patterns That Should Raise Alarms
Two decades of this work, and certain signals keep repeating:
Top-3 customer concentration above 40%. Not automatically fatal, but those relationships need individual deep-dives. If any of them are soft, the valuation math changes fast.
Revenue growth driven by non-recurring events. A big contract win. A competitor exit. A regulatory mandate that created temporary demand. These inflate trailing numbers and make projections look more reliable than they are.
Pipeline full of “almost done” deals. When 30%+ of projected pipeline is described as “verbal commitment” or “just waiting on signatures,” verify independently. In my experience, verbal commitments convert at about half the rate sellers claim.
Technology transition risk. The current product works fine, but it’s built on aging infrastructure. Management promises the next version will be better. The next version isn’t shipped yet, and customers are already evaluating alternatives.
Key-person dependency. Revenue hinges on 2-3 individuals who hold the customer relationships. If they leave during integration—and integration is often when people leave—the revenue follows them out the door.
Financial models don’t kill acquisitions. Untested commercial assumptions do. The deals that work are the ones where the buyer understood the commercial reality before signing—not the story the seller told, but the story the market told.