Business acquisitions in Australia fail or underperform for a lot of reasons, and IT is near the top of the list of overlooked risk areas. Financial due diligence gets done properly. Legal due diligence gets done properly. HR, property, and environmental are typically reviewed. Then the technology environment of the acquired business either gets a cursory glance or is skipped entirely on the assumption that “the IT will sort itself out” after settlement.

It does not sort itself out. It reveals itself, usually at significant cost and at the worst possible moment, which is when you are trying to integrate two businesses and deliver on the strategic rationale for the acquisition. This post is for Operations Managers, General Managers, and business owners involved in acquisition planning who need to understand what IT due diligence actually involves and why skipping it is one of the more expensive mistakes you can make in a transaction.

Why IT Due Diligence Is Often Skipped

There are a few reasons IT due diligence gets deprioritised in Australian acquisition processes, and most of them are understandable even if the outcome is not.

Deals move fast. When a transaction has momentum, the pressure to not slow things down with additional workstreams is real. IT due diligence adds time and cost, and in a competitive process, buyers are reluctant to appear difficult. That pressure is legitimate, but it does not change the risk profile of what happens after settlement.

IT is seen as a solvable problem. Most buyers assume that whatever IT issues exist in the target business can be addressed post-acquisition as part of the integration plan. Sometimes that is true. Often it is not, because the issues that surface are more complex, more costly, or more urgent than anticipated.

There is no standard process. Financial and legal due diligence have established frameworks. IT due diligence does not have the same standardised methodology, which means it is easy to treat as ad hoc or optional rather than as a structured risk assessment.

The deal team does not know what to look for. Most lawyers and accountants involved in transactions are not equipped to assess technology risk. Without someone in the room who knows what questions to ask, IT risk does not get properly evaluated.

None of those reasons justify skipping it. An IT system with significant debt, security vulnerabilities, or licensing non-compliance can represent hundreds of thousands of dollars in remediation cost, regulatory exposure, and operational disruption that was not priced into the deal. IT due diligence is how you find that before you sign, not after.

The 8 Things to Check in Any Acquisition IT Audit

A structured IT due diligence assessment for an Australian acquisition should cover the following areas as a minimum.

1. Hardware inventory and age. What devices exist, how old are they, and are they supported? A business with a fleet of laptops and servers that are beyond end-of-life has a near-term capital expenditure requirement that should be reflected in the deal price or remediated before settlement. Hardware that is no longer supported by the manufacturer is also a security liability.

2. Software licensing compliance. This is one of the most commonly found issues in acquisition IT audits. Many businesses, particularly smaller ones that have grown organically, are running software that is either unlicensed, running on more devices than the licence permits, or using perpetual licences that are not transferable to the acquiring entity. Unlicensed software represents a legal liability that transfers with the business. The exposure can be significant depending on the software involved.

3. Vendor contracts and transferability. What IT contracts does the target business hold, and which of those contracts transfer on acquisition versus require renegotiation? Managed services agreements, internet service contracts, software subscriptions, and hardware maintenance contracts all have terms around change of ownership. Some renew automatically and include significant penalties for early termination. Others have clauses that trigger renegotiation on a change of control event. Knowing what you are inheriting before settlement avoids unpleasant surprises.

4. Cybersecurity posture. What is the current security baseline of the target’s IT environment? This includes whether endpoint protection is deployed and current, whether multi-factor authentication is in place for key systems, what the patch status is across devices and servers, whether any known vulnerabilities exist, and what the incident history looks like. A business that has experienced a security incident and not disclosed it represents both a liability and a potential compliance obligation under the Notifiable Data Breaches scheme.

5. Data assets and privacy compliance. What data does the target business hold, where is it stored, and is that storage compliant with the Privacy Act and any applicable sector-specific regulations? Data stored in non-compliant locations, shared without appropriate controls, or retained beyond required periods represents regulatory risk. Understanding the data landscape also informs post-acquisition integration planning.

6. Infrastructure dependencies and single points of failure. Does the target business have critical infrastructure that is held together by one person’s knowledge, one server that has never been backed up, or one piece of software that the entire operation depends on? Single points of failure in IT environments are common and often invisible until they fail. An IT due diligence assessment identifies these dependencies so they can be addressed as part of integration planning.

7. Backup and recovery capability. Is the target business’s data being backed up? If so, how, where, and how recently has the restore process been tested? Businesses that have never tested their backup restoration process frequently discover during an actual recovery event that the backups are incomplete, corrupt, or inaccessible. That is an existential risk for a business you have just acquired.

8. Integration complexity and cost estimate. Based on what you find across the above areas, what will it actually cost to bring the target’s IT environment up to your standards and integrate it into your existing infrastructure? This is the output that the rest of the due diligence feeds into, and it is the number that should influence your deal price or your integration budget.

Common IT Skeletons Found in Acquisitions

In IT due diligence assessments across Australian acquisitions, some findings come up consistently.

Legacy systems with no vendor support. Businesses running end-of-life operating systems, unsupported databases, or deprecated line-of-business applications are carrying security and operational risk that the acquiring party inherits on day one. Replacing these systems is often more complex and expensive than anticipated because undocumented data migrations and integrations surface during the process.

Unlicensed software at scale. Particularly common in businesses that grew quickly without formal IT governance. Adobe Creative Cloud on 15 machines with two licences, Microsoft Office installs that are not tied to an active subscription, and industry-specific software running on more seats than paid for are all typical findings.

Security gaps that have not been assessed. Many acquisition targets have never had an independent security review. When one is conducted as part of due diligence, the findings can be significant: no multi-factor authentication on email, no endpoint protection on staff devices, open ports on internet-facing infrastructure, and administrative accounts shared across multiple users. These gaps are often not disclosed because no one on the target side knows they exist.

IT knowledge held by one departing person. Particularly in businesses where a founder or long-tenured IT person is part of the exit, significant institutional knowledge about how systems are configured and maintained may not be documented anywhere. When that person leaves, the acquiring business is left managing infrastructure no one fully understands.

Cloud infrastructure with no governance. Businesses that have adopted cloud services organically often have AWS, Azure, or Google Cloud environments with no cost controls, no access governance, and significant sprawl. Monthly cloud bills can be significantly higher than represented, and the security configuration of these environments is often poor.

How to Cost-Remediate What You Find

Not every IT issue found during due diligence is a reason to walk away from a deal. Many are quantifiable and either priceable into the transaction or addressable through a structured integration plan. The key is having the information before you commit rather than discovering it during integration when your leverage is gone.

Findings from an IT due diligence assessment should be categorised by urgency and cost. Critical security vulnerabilities, unlicensed software with significant legal exposure, and failing infrastructure with no backup represent immediate post-settlement priorities. Ageing hardware, legacy system migrations, and integration work represent planned expenditure that should be budgeted and resourced as part of the integration plan.

The output of a rigorous IT due diligence assessment is a remediation roadmap with associated cost estimates, not just a list of problems. That roadmap allows the acquiring business to make informed decisions about deal structure, integration investment, and post-settlement priorities rather than being surprised by each issue as it surfaces.

How Otto IT Supports Acquisition IT Assessments

Otto IT conducts IT due diligence assessments for Australian businesses involved in acquisitions. Our assessments cover all eight areas described above and produce a written report that includes findings, risk ratings, and remediation cost estimates suitable for inclusion in deal documentation or board reporting.

We work within your transaction timeline and can typically complete an initial assessment within one to two weeks of engagement, depending on the size and complexity of the target’s environment. For larger or more complex transactions, we can structure a phased assessment that delivers critical findings first. Our managed IT support team has the technical breadth to assess environments across all major platforms, and our security practice covers the cybersecurity assessment component with the rigour that a compliance-focused finding requires.

Post-acquisition, we can also support the integration and remediation work identified during due diligence. Having the same team that identified the issues also managing the remediation removes the handover friction that occurs when due diligence and integration are conducted by different providers. Our digital transformation services include post-acquisition technology integration for businesses that need structured support through the combination process.

The Bottom Line

IT due diligence is not a nice-to-have in Australian business acquisitions. It is a risk management necessity for any buyer who wants to understand what they are actually acquiring. The cost of a thorough IT assessment is a rounding error compared to the cost of discovering a significant IT liability after settlement.

The businesses that approach acquisitions with rigorous IT due diligence make better-informed deals, build more accurate integration budgets, and face fewer unpleasant surprises in the months after settlement. The businesses that skip it tend to find out why that was a mistake at exactly the time they can least afford the distraction.

Talk to us about IT due diligence. Contact Otto IT before you sign, and we will make sure you know exactly what you are buying from a technology perspective.

Frequently Asked Questions

How long does it take to implement diligence acquiring business for a small business?

Implementation timelines vary based on your environment size and complexity. Most small to medium-sized Australian businesses can expect an initial rollout to take anywhere from a few days to several weeks, depending on the scope. Partnering with an experienced managed IT provider helps streamline the process and reduces disruption to day-to-day operations.

What are the ongoing costs associated with diligence acquiring business?

Costs depend on your organisation’s size, existing infrastructure, and the level of support you require. Many modern solutions use subscription-based pricing, which makes ongoing costs predictable and easier to budget. We recommend requesting a scoped proposal tailored to your specific environment to get an accurate figure.

Do I need an in-house IT team to manage diligence acquiring business?

Not necessarily. Many organisations outsource this to a managed IT services provider, which gives you access to specialist expertise without the overhead of a full-time hire. A good provider will handle setup, monitoring, updates, and support on your behalf, freeing your team to focus on core business activities.

Is diligence relevant for non-technical industries like law, accounting, or healthcare?

Absolutely. Non-technical industries often have the most to gain, as they handle sensitive client data and face strict compliance and regulatory requirements. Solutions in this space are designed to be accessible and user-friendly, so your staff do not need a technical background to benefit from them.

How do I know if my current approach is adequate?

The best starting point is a technology assessment or independent audit conducted by a qualified IT professional. This identifies gaps in your current setup and produces a prioritised list of improvements. Otto IT offers complimentary assessments for businesses looking to understand their technology posture and where to focus next.