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Why Deals Die

The diligence findings that kill transactions.
2026 EditionComplimentary PDF30+ pagesPrepared by the Windsor Drake Research desk
Executive summary

What this report finds

A founder who signs a letter of intent feels the deal is done. It is not. The riskiest part of a sale begins at the LOI, in confirmatory diligence, and a large share of signed deals never close, or close on materially worse terms than the term sheet promised.

Key takeaways from the analysis

Deals fail at every stage of a sale, but not evenly. Understanding where failure concentrates tells a founder where to focus the preparation that prevents it.

Deals die for reasons that fall into a small number of categories. The taxonomy below names them, because a founder who knows the categories can prepare against each, rather than worrying about deal failure in the abstract.

A dead deal is painful, but a retrade can be worse, because the founder, having lost leverage and alternatives, often accepts a materially worse deal rather than walk away with nothing. Understanding how a retrade works is how a founder resists it.

The abstractions become concrete in the arc of a single failed deal. The illustrative sequence below is composed from the common pattern, and it shows how a strong company and a real buyer end with nothing.

A buyer who walks loses some fees and a few weeks. A founder who watches a deal die loses far more, and the full cost is rarely appreciated until it is paid. Understanding the stakes is what justifies the preparation.

~46%
Of failures from diligence
~21%
From QoE discrepancies
#1
EBITDA reduction, the killer
Post-LOI
Where most deals die

Windsor Drake’s research desk compiled this report from transaction data, public filings, and the firm’s sell-side advisory work in software, fintech, AI, and cybersecurity. It is intended to inform founders, owners, and acquirers evaluating a transaction, and does not constitute investment advice.

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FAQ

Questions about this report

What is Why Deals Die?

The diligence findings that kill transactions. A founder who signs a letter of intent feels the deal is done.

What time period does the report cover?

The report draws on 2025 deal activity across the software, fintech, AI, and cybersecurity markets, with Windsor Drake’s outlook for 2026.

How much does the report cost?

It is complimentary. Enter your email and the full PDF is sent to your inbox.

Who is the report for?

Founders, owners, and shareholders weighing a sale, alongside the acquirers, investors, and journalists who track lower middle market M&A.

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