Commercial due diligence tests whether a target's market and position support the investment thesis. It covers market size and growth, competitive position, customer sentiment and red flags, and it ends with the questions management and expert calls must answer. It complements financial and legal diligence by asking whether the business will keep winning.
Financial diligence confirms what a business has earned. Commercial diligence asks whether it can keep earning it: whether the market is growing, whether the target is winning or losing share, and whether customers are likely to stay. A thesis that rests on assumptions nobody has tested is a common way for a deal to go wrong.
What questions does commercial due diligence answer?
It answers four questions: how attractive the market is, how strong the target's position is, what customers think, and what could break the thesis.
- Market: size, growth, drivers and cyclicality, and how the target defines its market compared with how others do.
- Competitive position: share, differentiation, pricing power and the moves competitors are making.
- Customers: concentration, loyalty, satisfaction signals and switching costs.
- Red flags: regulatory change, disruptive substitutes, dependence on a few customers or suppliers, and claims in the sale materials that don't hold up.
For example, a deal team evaluating a software company might test whether its growth comes from a rising market or from taking share, because the two imply very different futures.
Don't adopt the seller's market figure. Rebuild the market size yourself, top-down and bottom-up, and judge the industry's attractiveness with a structured method such as Porter's Five Forces. The free TAM SAM SOM market sizing template and five forces industry assessment template are starting points for both.
How does desk research differ from expert calls?
Desk research uses public sources to build the fact base quickly; expert and customer calls test the points that public information can't settle. Diligence usually uses both, typically in that order.
Desk research is fast and repeatable: industry reports, public company filings, news, pricing pages and customer reviews. It can map the market, the competitors and the obvious risks, and every claim can be cited. What it can't do is reveal private information, such as a key customer's renewal intentions. That gap is exactly what calls with management, former employees, customers and industry experts are for.
How do findings become questions for management?
Every finding that is uncertain or material should become a specific question. Good questions point to evidence the team can request.
- List the thesis assumptions, such as "the market grows steadily" or "churn stays low".
- Mark each one as supported, contradicted or unclear by the desk research.
- Turn the unclear and contradicted ones into questions, each with the data that would settle it.
- Group the questions by meeting: management presentation, expert call or customer reference.
Prioritizing the must-ask questions matters, because meeting time is short. A SWOT analysis of the target, with evidence and impact ratings, is a useful input when the questions concern its competitive standing.
How does commercial diligence fit the rest of the process?
It runs alongside financial, legal, operational and technology workstreams, and its findings shape the valuation, the terms and the value-creation plan. A shared tracker keeps the workstreams aligned.
A diligence tracker lists each item by workstream, gives it a priority, and records its status, owner and data-room reference. Items that gate a letter of intent or signing get the highest priority, and red flags are logged in one place so none are lost between teams. The conclusions then feed the investment committee memo; the free investment committee memo template has sections for the thesis, risks and diligence status.
What red flags should you look for?
Watch for gaps between the story and the evidence:
- Growth that depends on one customer, one channel or one product.
- A market definition drawn narrowly to make share look large.
- Customer complaints that contradict claims of high satisfaction.
- Regulatory or technology changes that the sale materials don't mention.
Key takeaways
- Commercial due diligence tests whether the market and the target's position support the investment thesis.
- Desk research builds the cited fact base quickly; expert and customer calls settle what public sources can't.
- Every uncertain or material finding should become a specific question, with the evidence that would answer it.
- A shared tracker with priorities and a red-flag log keeps the diligence workstreams aligned.
How Forward Deployed helps
Ask for Outside-In Commercial Due Diligence in your AI assistant: give the target and the deal thesis, see the price, approve it, and get a Word report from public sources, with every claim cited, on market growth, competitive position, customer sentiment and red flags, plus questions for management and expert calls. Due Diligence Planning builds the tracker with priorities and a red-flag log, and Management and Expert Call Preparation prepares prioritized questions for each meeting. All three are listed under deal teams and investors; to discuss a live deal, talk to us.
Frequently asked questions
Is commercial due diligence only for private equity?
No. Private equity firms use it heavily, but strategic buyers, lenders and other investors use the same approach whenever an investment depends on a market and a competitive position. The questions are the same: is the market attractive, is the target winning, and what could go wrong.
How long does commercial due diligence take?
A desk-research view can be produced quickly, which makes it useful for early screening. A full diligence effort takes longer because it adds expert calls, customer references and management meetings, and it runs in parallel with the financial and legal workstreams on the deal timetable.
Can desk research replace expert calls in diligence?
Not fully. Desk research builds a cited fact base and identifies what needs testing, but it can't reveal private information such as customer renewal intentions or internal performance. Expert and customer calls are how those points are settled, so the two work best together.
What is a red flag in commercial due diligence?
A red flag is evidence that could undermine the investment thesis: heavy dependence on a few customers, a shrinking market, a disruptive competitor, unresolved regulatory risk, or claims in the sale materials that the evidence doesn't support. Each red flag should be logged and turned into a question to resolve.