The Hidden Tech Risks Investors Miss Before Acquiring a Company
- 6 hours ago
- 5 min read
Most investors focus on financials when evaluating a deal. But the biggest risks are often hidden in the technology. That's where deals quietly lose value or fall apart entirely.
In our experience working with investors and executives through technology-driven acquisitions, these risks rarely surface in early-stage analysis. But they consistently affect deal outcomes — through integration delays, unexpected costs, and liabilities that were never priced in.
A 2024 Fortune analysis of 40,000 acquisitions worldwide found that 70–75% of deals fail. Bain & Company, in the same year, found that only 30% achieve their synergy targets. Technology is often one of the reasons those deals fall short — especially when risk is not examined early enough. The scale of the problem becomes clearer when you look at the numbers:
Risk 01
The Technical Debt You Cannot See on a Balance Sheet
Technical debt is the accumulation of shortcuts, outdated code, and deferred maintenance that builds up inside any software product over time. Developers describe it as a silent tax — every workaround taken to ship faster creates a future obligation to fix things properly. The problem for investors is that this obligation does not appear anywhere in a company's financials.
According to McKinsey, technical debt can consume up to 40% of a company's entire technology estate. Analyses of M&A transactions show that 31% of acquired codebases carry significant technical debt that materially threatens valuations and post-deal performance. Think of it like buying a car that looks immaculate on the outside but hasn't had an oil change in five years. The price might look right — until you drive it home.
The consequences compound after signing. Alvarez & Marsal highlights that IT integration in M&A is often complex and prolonged, with fragmented systems, incompatible architectures, and siloed teams requiring years of effort, significant capital investment, and dedicated resources—often delaying value realization and consuming capacity intended for growth initiatives. McKinsey research shows that hidden IT costs—often driven by technical debt and system complexity—can significantly inflate total cost of ownership, with some organizations uncovering up to 58% additional hidden costs only after deeper analysis of their technology estate.
"Technical debt is not a tech team problem. It is an investor problem. The bill always comes due — the only question is who pays it."
Risk 02
Cybersecurity Vulnerabilities Inherited at Closing
Perhaps no category of hidden tech risk has proven more financially catastrophic than cybersecurity, and the pattern is remarkably consistent. A buyer acquires a company, and somewhere in the integration process, a breach that predated the deal surfaces. By then, the acquirer owns the liability.
Case Study · Verizon / Yahoo, 2017
A $350 Million Lesson in Pre-Deal Disclosure
When Verizon acquired Yahoo, two previously undisclosed data breaches came to light during the process — one affecting 500 million accounts, the other every Yahoo account in existence. The deal price was cut by $350 million, Verizon absorbed shared legal liability, and the SEC fined Yahoo $35 million for failing to disclose the incidents in time. The reputational damage outlasted the financial settlement.The Marriott–Starwood acquisition tells a similar story: a breach that began in 2014 ran continuously through the deal process and for two years after closing, eventually resulting in a £123 million GDPR fine. In both cases, the liability transferred with the company, because no one looked carefully enough before signing.
These are not outliers. A 2024 analysis of M&A-related cybersecurity incidents found that the manufacturing sector accounted for 42% of observed M&A incidents, making it the most affected industry, largely due to legacy systems and complex operational technology environments. The integration period is itself a window of elevated risk: mismatched security standards and unfamiliar IT policies create new exposure at exactly the wrong moment.
Hidden vulnerabilities take an average of 277 days to identify and contain. In an acquisition, that clock often starts ticking before the ink is dry — and the new owner is the one who answers for it.
Risk 03
Scalability Constraints and Infrastructure Surprises
When an investor acquires a company, the thesis often involves growth: more customers, higher transaction volumes, expanded product lines. What the due diligence process rarely interrogates is whether the target's technology can actually support that growth. Scalability constraints are invisible at current operating levels — they only manifest when you push the system.
Cloud infrastructure is one of the most common sources of post-deal surprise. Many targets have accumulated spending commitments, subscription tiers, and single-provider dependencies that only become visible when contracts are read carefully. Vendor lock-in — where infrastructure is deeply tied to one cloud provider in ways that make migration costly — is a structural constraint that rarely appears in executive presentations.
Legacy systems add another layer. When a company still depends on a physical data centre, the costs of hardware age, energy, and eventual migration are real but almost never included in projections. And when two companies each run their own ERP, CRM, and finance systems, the cost of unifying them routinely exceeds initial estimates.
Before any deal closes, there should be a clear answer to one question: can this infrastructure support the growth the thesis depends on? If the answer is unknown, it belongs in the valuation model.
Risk 03
Software Licensing, Open Source, and IP Landmines
Software licensing is among the least glamorous topics in M&A — and among the most financially dangerous when overlooked. Most large software vendors run structured audit programs with explicit revenue targets assigned to their compliance teams. When a company changes ownership, it often triggers audit rights. The findings can be severe.
Holland & Knight, a law firm with significant M&A technology practice, has documented cases where software audits conducted after closing identified non-compliance issues resulting in nine-figure demands — in some instances exceeding the entire value of the transaction. These are predictable outcomes of deals where licensing was not reviewed before signing.
Open-source components present a related problem. These issues are easy to miss in fast-moving deals, but they can affect ownership, compliance, and future product value. Modern software is built on open-source libraries, which creates licensing obligations that need tracking. Some licences require any derivative work to also be made open source. If a target has incorporated such components without realising the implications, the acquirer may inherit an obligation that undermines the IP it thought it was buying — including IP chain of title questions that can materially alter deal terms or kill transactions entirely.
Request a complete inventory of all third-party software licences and confirm compliance status
Run a software composition analysis to identify open-source components and their licence obligations
Confirm all IP is owned outright, with no contractor or founder carve-outs
Ask whether the target has been subject to a software audit in the past three years, and what the outcome was
Check whether change of control provisions in software contracts trigger renegotiation rights for the vendor
THE BOTTOM LINE
Tech Due Diligence Is Not a Checkbox — It Is a Valuation Tool
The technology stack of a target company is not a secondary concern. In a digital economy, it is often central to whether the investment thesis holds. Research shows that IT is a major enabler of M&A synergies, particularly through system consolidation, cost reduction, and operational integration.
At the same time, more than 60% of transactions fail to achieve their expected synergies, often due to integration challenges—including technology.
The investors who consistently get this right treat technical due diligence as a valuation instrument, not a formality. Technical debt adjusts the purchase price. Cybersecurity posture affects representations and warranties coverage. Scalability constraints reshape the integration cost model. Licensing exposure becomes a negotiating lever.
In our experience, these risks rarely appear in early-stage deal analysis. But they are almost always present to some degree — and consistently affect outcomes when left unexamined.
If you are evaluating a technology company, these risks should be visible before the deal closes — not after. A structured technical due diligence process helps make them visible early, while there is still time to price them, negotiate around them, or walk away.
That is the work we support with investors and leadership teams.
