Glossary · Due diligence

Vendor due diligence

Vendor due diligence (VDD) is a due diligence the seller commissions from an independent audit firm before the sale launches — designed to compress buy-side DD and pre-empt risk findings.

Definition

In classic M&A only the buyer does DD: the clock starts post-LOI. For sellers playing on timing or buyer plurality, that's a drawback: every buyer runs their own version, it drags out, and every surprise found drives a price chip.

A VDD flips the script. A Big Four firm or specialist M&A-DD shop walks through financials, legal and operations for 3-6 weeks and delivers an independent report into the dataroom. Buyers build on it rather than starting from zero. Result: shorter DD (4-6 weeks vs 8-12), more buyers willing to bid seriously, and the seller can address surprises up front instead of mid-deal.

When it matters

Mainly for deals above €5m, competitive auctions, or businesses with complex structure (multi-entity, cross-border, family). Below €5m the cost (€20-60k for a Benelux SME) usually exceeds the return.

Read: pre-emptive VDD for SMEs

Frequently asked

How much does VDD cost?: €20-60k for a Benelux SME with €5-20m revenue, depending on scope (financial-only vs full-scope financial + legal + commercial) and sector complexity.
How much DD time does it save?: Typically 30-50% reduction. A 10-week buy-side DD becomes 5-6 weeks; a 5-bidder auction strips 6-8 weeks from the timeline.
Do buyers actually trust a seller-commissioned VDD?: Yes, provided it is executed by an independent Big Four or specialist DD shop that offers its own liability (via the "reliance letter") to the buyer. An internal VDD carries little weight.
When is VDD overkill?: For deals below €5m, strongly bilateral negotiations (one strategic buyer), or businesses without much complexity. Invest in a well-prepared dataroom without external VDD instead.

Related terms

Dataroom (VDR)— A dataroom is the secure online space where the seller organises every due-diligence document…
Letter of Intent (LOI)— A Letter of Intent is a typically non-binding term sheet capturing the headline commercial…

Definition

Frequently asked

How much does VDD cost?

€20-60k for a Benelux SME with €5-20m revenue, depending on scope (financial-only vs full-scope financial + legal + commercial) and sector complexity.

How much DD time does it save?

Typically 30-50% reduction. A 10-week buy-side DD becomes 5-6 weeks; a 5-bidder auction strips 6-8 weeks from the timeline.

Do buyers actually trust a seller-commissioned VDD?

Yes, provided it is executed by an independent Big Four or specialist DD shop that offers its own liability (via the "reliance letter") to the buyer. An internal VDD carries little weight.

When is VDD overkill?

For deals below €5m, strongly bilateral negotiations (one strategic buyer), or businesses without much complexity. Invest in a well-prepared dataroom without external VDD instead.