Key takeaways
- A VDD report is a seller-commissioned quality of earnings and operational diligence report prepared before the sale process begins, shared with qualified buyers.
- Well-prepared VDD reports compress buyer diligence timelines by 4 to 8 weeks, reducing process risk and management bandwidth consumption.
- VDD reports are most valuable when the business has complex financials, non-standard accounting, or prior-year adjustments that need proactive explanation.
- At $5M to $15M EBITDA, VDD report costs typically run $75K to $200K; the ROI depends on whether it prevents a price re-trade or process failure.
- A VDD report does not replace buyer diligence, but it sets the narrative and establishes the baseline that buyer QoE must either confirm or refute.
What a vendor due diligence report is
A vendor due diligence (VDD) report is a quality of earnings and operational analysis commissioned by the seller, completed before or during a sale process, and made available to qualified buyers. It covers the same ground a buyer QoE covers: revenue quality, EBITDA adjustments, customer concentration, working capital, and key operating metrics. The difference is that the seller controls the timing, scope framing, and narrative.
VDD is not a way to hide problems. Buyers will conduct their own diligence regardless. VDD is a way to surface, explain, and contextualize issues before they become surprise re-trade events late in the process.
VDD vs. Buyer QoE
When a VDD report pays for itself
VDD reports are not the right choice for every transaction. They add cost, require management time for preparation, and create a document that buyers can use to identify issues if the report is not carefully prepared. The scenarios where VDD consistently delivers positive ROI are specific.
When VDD Makes Economic Sense
Scenario 1: Complex adjustments
Business has multiple years of non-recurring items, ownership perks, or one-time charges that need proactive EBITDA bridge explanation.
Scenario 2: Non-GAAP accounting
Business uses modified or industry-specific accounting that differs from what buyers expect to see.
Scenario 3: Revenue quality questions
Revenue mix includes project-based, variable, or contract-expiring revenue that requires careful characterization.
Scenario 4: Prior-year volatility
Revenue or EBITDA had a down year that needs contextualized explanation before buyer QoE surfaces it.
Scenario 5: Competitive process
Multiple sophisticated buyers in parallel; VDD accelerates each buyer's process simultaneously without duplicating management time.
The clearest ROI case: a business with $8M EBITDA that has $1.5M in defensible EBITDA adjustments. Without VDD, each buyer's diligence team approaches those adjustments skeptically and may apply haircuts. With VDD, the adjustments are pre-documented with supporting schedules, and the buyer QoE either confirms or argues against a pre-established position. Sellers with well-documented adjustments re-trade less often.
What a VDD report covers
A full VDD report covers quality of earnings (revenue analysis, EBITDA adjustments, working capital), operational overview (key customer and vendor relationships, management team, systems), and often a brief commercial assessment (market position, competitive dynamics). The financial analysis is the core.
Typical VDD report length
40-80 pages
EBITDA adjustment schedules
Yes, fully documented
Customer concentration analysis
Yes, by revenue %
Working capital analysis
Yes, trailing 12-month normalized
A distribution business preparing for a sale had three years of adjusted EBITDA that included owner compensation normalization, a one-time facility repair, and a COVID-related PPP loan forgiveness gain. Without VDD, each buyer spent 3 to 4 weeks reconciling these items, creating re-trade risk on the PPP gain characterization. The VDD report addressed all three items with supporting schedules and legal analysis. Buyer QoE confirmed the adjustments. The process closed 6 weeks faster than comparable transactions and with no re-trade on EBITDA.
Limitations of a vendor due diligence report
VDD does not replace buyer diligence. Sophisticated PE buyers will conduct their own QoE regardless of whether a VDD exists. The VDD sets a baseline and establishes narrative, but the buyer's firm will verify, and any inconsistency between the VDD and buyer QoE findings becomes a negotiating point in the seller's favor or against it depending on which direction the inconsistency runs.
VDD reports prepared by less rigorous firms can create problems: if the buyer's QoE finds issues the VDD missed or characterized incorrectly, it damages seller credibility at a critical negotiating moment. Commission VDD only from firms with credible M&A diligence track records.
A VDD report is only as valuable as its preparer is credible. Buyers discount VDD from unknown or seller-friendly firms. The report should come from a recognized accounting or advisory firm with M&A diligence experience.
Cost, timing, and how to commission a VDD report
VDD costs at lower-middle-market deal sizes ($5M to $25M EBITDA) typically run $75K to $200K depending on business complexity, number of years covered, and scope. The timeline from engagement to report delivery is typically 6 to 10 weeks.
Commission the VDD 3 to 4 months before you intend to launch the sale process. This gives time for the report to be completed, for any identified issues to be addressed, and for the final report to be available to buyers at or shortly after process launch.
Seller-commissioned VDD reports were used in approximately 35% of European M&A transactions above $50M and in a growing share of US lower-middle-market transactions above $20M.
Processes supported by VDD reports closed an average of 5.3 weeks faster than comparable processes without VDD, based on transaction timeline analysis across 180 deals.
Re-trade frequency on EBITDA was 28% lower in transactions with VDD reports versus comparable transactions without them.
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