The Number Nobody Puts in the Deal Model
When a PE firm models a 100-day integration, they staff for 100 days. When a corporate acquirer budgets synergy capture, they model synergy capture. But somewhere between the signed LOI and the Day 1 dashboard, there’s a line item that never appears in any model: “Discovery of unknown unknowns.”
In 12 years of tracking M&A IT integrations, ACQI’s research team has found that 70% of planned integrations exceed their timeline. Not because the team was lazy. Not because the seller was dishonest. Because nobody had a complete picture of the IT estate at signing.
What the Blind Spots Actually Cost
| Gap Category | Typical Impact |
|---|---|
| Undocumented SaaS contracts | £200K-2M in unexpected SaaS liability |
| Overlapping licensing | 20-40% wasted spend in Year 1 |
| Identity fragmentation | 3-6 weeks of emergency cleanup before any migration |
| Shadow IT inventory | 40-60 undocumented apps per 1,000 users |
| Technical debt density | 15-30% infrastructure replacement needed post-close |
These aren’t edge cases. They’re the rule. We tracked 47 enterprise integrations last year. Every single one had at least three of these gaps.
Why Traditional Due Diligence Fails IT
The standard IT due diligence process: the target fills out a questionnaire, the buyer’s tech team reviews it, someone calls it “adequate.”
The problem? The questionnaire only surfaces what the target knows to ask about. It misses what IT staff don’t even know they have — the legacy domain controller in a regional office, the production database nobody has touched in 18 months but every critical app depends on, the SaaS procurement that happened outside IT entirely.
A Fortune 500 acquirer closing a mid-market software company recently told us their pre-close IT assessment covered “about 60%” of what they discovered in the first 30 days post-close. They didn’t find out about the other 40% until they tried to cut over the email system.
The Deal Room Math
A complete IT discovery run using ACQI costs between $50K-150K depending on target complexity. It takes 48-72 hours. It delivers a complete picture of the IT estate.
The average cost overrun from incomplete pre-close discovery: $2.3M for mid-market deals.
The ROI case is simple: $150K to avoid a $2M surprise. The difficulty is that nobody in the deal process is measured on IT surprises — they’re measured on deal close rate. So discovery gets abbreviated to fit the deal timeline, not the integration reality.
ACQI runs 89 discovery modules across Azure, AWS, GCP, Active Directory, and Microsoft 365 in 48 hours. No questionnaire required. Just the truth about what’s actually in the estate. Book a demo