What Is Commercial Due Diligence?
Commercial due diligence (CDD) is the workstream within the broader due diligence process that assesses the quality, sustainability, and growth potential of a target company’s revenue and market position. Where financial due diligence examines whether the historical numbers are accurate, commercial due diligence asks: are those numbers sustainable, and can the business grow?
CDD is typically commissioned by the buyer (often a private equity fund) and is conducted by a specialist strategy consultancy or the advisory arm of the buyer’s M&A advisor. The output is a commercial due diligence report that either validates or challenges the investment thesis underlying the acquisition price.
What Commercial Due Diligence Covers
| Assessment Area | What Is Examined |
|---|---|
| Market sizing and growth | Total addressable market, serviceable market, growth rate, structural drivers |
| Competitive position | Market share, competitive differentiation, barriers to entry, competitor landscape |
| Customer quality | Customer concentration, relationship depth, contract terms, NPS or satisfaction data |
| Revenue sustainability | Revenue mix (recurring vs project), churn rate, pipeline quality, customer retention |
| Sales and commercial model | Go-to-market model, pricing strategy, sales team capability, channel mix |
| Growth opportunities | Untapped adjacencies, cross-sell, geographic expansion, product extension |
| Management assessment | Commercial leadership quality, strategic capability, execution track record |
Commercial vs Financial Due Diligence
These are complementary workstreams, not substitutes:
| Commercial DD | Financial DD | |
|---|---|---|
| Primary question | Is the business well-positioned to sustain and grow revenue? | Are the reported financials accurate and sustainable? |
| Performed by | Strategy consultancy, commercial advisors | Accounting firm (big 4, mid-tier) |
| Inputs | Customer interviews, market data, management discussions | Audited accounts, management accounts, QoE analysis |
| Output | Market assessment, competitive positioning, growth scenario analysis | Normalised EBITDA, working capital analysis, QoE report |
| Timing | Typically concurrent with financial DD | Typically concurrent with commercial DD |
Both reports feed into the final binding offer price. A strong CDD report can justify a buyer paying at the top of the valuation range; a weak or negative CDD report — particularly on customer concentration or market saturation — will cause the buyer to reduce their offer or walk away.
The Role of Customer Interviews
A rigorous CDD process includes direct interviews with the target’s customers. With the seller’s permission (typically granted to a small number of top customers who can be trusted with process confidentiality), the CDD advisor speaks directly with customers to assess:
- The strength and depth of the customer relationship
- The customer’s likelihood of renewing or continuing to purchase post-acquisition
- The customer’s perception of the target relative to its competitors
- The customer’s buying decision factors and switching costs
Customer interviews are the most valuable data point in CDD. A seller whose top 5 customers speak enthusiastically about the relationship materially strengthens the buyer’s confidence and reduces the discount applied to customer concentration risk.
Vendor-Initiated Commercial Due Diligence
Sellers sometimes commission their own CDD report — a vendor commercial due diligence (VCDD) or vendor due diligence (VDD) process — before going to market. This is particularly common in the Australian and UK mid-market, where quality sell-side processes regularly include a vendor CDD report prepared by a reputable firm and provided to buyers during the data room phase.
Benefits of vendor CDD:
- Surfaces commercial issues before buyers find them (and use them to reprice)
- Provides a credible, independently-prepared narrative that supports the seller’s business case
- Reduces the buyer’s need for extensive independent CDD, accelerating the process and reducing deal risk
- Demonstrates to buyers that the seller is running a sophisticated process — which increases competitive tension
Vendor due diligence reports typically include both financial and commercial workstreams, commissioned by the seller and “addressed” or reliant-on by buyers (under a formal letter of reliance).
When Commercial Due Diligence Is Required
CDD is not universal. It tends to be mandatory for:
- Private equity acquisitions — PE funds are required by LPs to conduct independent CDD on most investments above a minimum size; this is a standard part of investment committee approval
- Large strategic acquisitions — A corporation acquiring a business entering a new market it is unfamiliar with typically commissions CDD to validate market assumptions
- Complex or high-growth businesses — Where a meaningful portion of the acquisition price reflects future growth (i.e., the EBITDA multiple is high because of future expansion potential), CDD validates whether that growth is realistic
CDD is less commonly used for:
- Very small transactions (below A$5–10M) where cost is disproportionate to transaction size
- Strategics acquiring highly familiar categories
- Family office buyers making owner-operated acquisitions
Implications for Sellers
Sellers who understand commercial due diligence can prepare proactively:
- Organise customer data — Customer revenue concentration, contract terms, renewal history, NPS scores, and longlisting of referenceable customers for CDD interviews
- Prepare a market analysis — Independent market sizing and growth data that supports the seller’s growth narrative; ideally referenced to credible industry sources
- Document competitive positioning — Clear articulation of why the business wins customers over competitors, supported by win/loss data
- Pre-empt the key risks — If there are known risks (a large customer relationship, a competitive entrant), acknowledge and address them proactively rather than waiting for the buyer’s CDD to surface them
- Commission vendor CDD — For mid-market transactions above A$15–20M, consider a vendor CDD report from a credible firm to control the commercial narrative and accelerate the buyer’s process
Lyndon Advisory helps sell-side clients prepare for commercial due diligence by developing the commercial narrative, organising the data room, and guiding sellers through the buyer CDD interview process.