Acquisitions remain one of the most effective ways for organisations to accelerate growth. In many industries, mergers and acquisitions (M&A) provide a faster route to expansion than organic growth alone. For finance leaders and executive teams, acquisitions can unlock new revenue streams, strengthen market position and provide access to capabilities that would otherwise take years to build.
For CFOs in particular, transactions are typically driven by clear strategic and financial objectives. These often include increasing EBITDA, delivering shareholder value, expanding into new markets, acquiring specialist expertise or technology, and creating operational efficiencies through greater scale. When executed well, acquisitions can transform organisations and significantly enhance long-term value.
As a result, companies typically dedicate considerable time and resources to preparing for a transaction. Financial modelling, valuation work, due diligence, and deal structuring often receive intense focus in the months leading up to completion. Legal teams, advisors, and management all work together to ensure the transaction is structured effectively and that risks are identified before the deal is finalised.
However, while the transaction itself receives significant attention, the period immediately after completion is sometimes underestimated. The closing of a deal is not the end of the process, despite it often being seen as the final checkpoint on the M&A timeline. In reality, it is the start of where the true value of the acquisition must be realised.
Put simply, value is rarely created at the moment a deal completes. It is created through successful management and integration in order to ensure that planned targets are acheived.
Our M&A support services supplement finance teams from the very beginning of the acquisition process, ensuring that long-term value realisation is considered from the initial planning stages. With oversight across multiple industries, we can provide valuable insight into what to do – and what should be avoided.
Read on to understand the common post-acquisition completion integration challenges we experience, plus how best to mitigate these.
The Integration Challenge
Once an acquisition has completed, management often face an immediate pressure to demonstrate progress. Leadership attention quickly shifts toward maintaining operational performance, communicating with stakeholders, and ensuring that the newly acquired business continues to operate effectively.
In this environment, the integration process can sometimes become secondary to day-to-day operational priorities. While integration plans may exist, they may not always receive the structured oversight required to ensure they are delivered effectively.
In practice, we frequently observe situations where integration challenges begin to emerge soon after completion. This is particularly common when large corporates acquire smaller businesses where systems, reporting structures, and operating models can differ significantly.
Some common issues that arise include fragmented financial reporting structures, inconsistent accounting policies across the group, and internal control environments that are not yet aligned. Operational synergies that were anticipated during the transaction phase may also take longer than expected to materialise.
It is important to emphasise that these challenges rarely occur because management are not committed to the success of the acquisition – more often they arise as a result of leadership teams managing multiple priorities to pressured timelines. Integration requires time, coordination, and structured planning, which can be difficult to maintain once attention returns to day-to-day operations.
Without clear governance and oversight, the anticipated benefits of the acquisition can be delayed. In some cases, the full value expected from the transaction may never be realised.
The Role of Finance in Successful Integration
The finance function plays a critical role in ensuring that acquisitions deliver the financial and strategic outcomes originally envisioned. CFOs and finance teams are often at the centre of integration efforts because they provide the Rigour and oversight required to manage a complex organisation.
One of the first priorities following an acquisition is the alignment of financial reporting processes. Newly acquired businesses may operate under different accounting policies or reporting frameworks, which can create inconsistencies within group reporting. Ensuring that consolidated financial statements and management reporting structures are aligned is essential to maintaining clarity and control.
Equally important is the strength of the internal control environment. Acquisitions can introduce new systems, processes, and teams into an organisation, and existing control frameworks may not automatically extend across the enlarged group. A careful review of financial controls helps ensure that governance remains robust and that risks are managed appropriately.
Another key responsibility for finance teams is ensuring visibility of performance across the group. This often involves establishing clear reporting frameworks, performance dashboards, and key metrics that allow leadership teams to monitor the performance of the acquired business and track progress toward expected synergies.
Finance teams also play an important role in identifying operational efficiency opportunities. Acquisitions often create potential for cost savings through shared services, procurement efficiencies, or technology integration. However, these benefits typically require deliberate planning and execution rather than occurring automatically.
Why Early Post-Completion Reviews Are Important
Although pre-transaction due diligence aims to identify potential risks, certain issues only become apparent once the acquiring organisation gains full access to systems, data, and operational processes. This is why the period shortly after completion can be particularly important.
Conducting an independent review soon after the acquisition can help organisations identify areas that require attention early in the integration process. These reviews often focus on areas such as financial reporting accuracy, alignment of accounting policies, and the effectiveness of the control environment across the expanded group.
They may also highlight operational risks or exposures that were not fully visible during the due diligence process. In some cases, these findings may have implications under the terms of the Share Purchase Agreement (SPA), making early identification particularly valuable as warranties and remedies for such issues often have defined time restrictions.
Addressing issues at this stage allows management teams to respond quickly, avoid unexpected surprises later in the process, and maintain confidence among stakeholders. Early visibility also helps ensure that integration remains aligned with the strategic objectives that originally justified the transaction.
Integration Does Not Need to Be Resource-Intensive
One common misconception about integration is that it requires large additional teams or significant internal resources. In reality, successful integration is less about the volume of resource and more about the structure and discipline applied to the process.
Organisations that manage integration effectively often share several characteristics. They begin planning integration activities well before the transaction completes and establish a clear roadmap outlining priorities, responsibilities, and timelines. Governance structures are typically put in place to ensure accountability and oversight throughout the process.
Financial reporting frameworks and internal controls are aligned early, allowing management to maintain visibility across the organisation. Clear communication also plays an important role, ensuring that teams across both businesses understand the integration strategy and their role in delivering it.
Finally, many successful organisations seek independent oversight to provide an objective perspective during the integration process. This helps leadership teams identify potential risks or gaps that may not be immediately visible internally.
This may also allow organisations with access to short term specialist expertise which may not warrant a long-term fixed head count increase. Examples include financial modelling which may require an expert to build and tailor a model following the acquisition where the ongoing maintenance can be handled by the in-house finance team.
Together, these elements help ensure that integration remains a strategic focus rather than something that develops informally over time.
Supporting Organisations Through the Integration Phase
At AssurAcc, we work with organisations following the transaction to provide independent assurance, specialist expertise and practical insights during the critical post-completion period.
Our support is designed to help leadership teams gain early visibility over the integration process and identify potential issues before they become significant challenges.
This includes conducting post-completion assurance reviews to highlight risks or exposures that may require management attention. We also support organisations in assessing financial reporting alignment across newly acquired businesses and reviewing internal control environments to ensure they remain robust.
In addition, we have a multi skilled team of experts who can step in to fill any short-term technical challenges that usually follow and acquisition. This can range from financial modelling, consolidation, technical accounting, process alignment and audit support.
By combining financial expertise with an independent perspective, our work helps organisations strengthen governance, improve transparency, and maintain confidence throughout the integration journey.
Turning Acquisitions into Long-Term Value
Acquisitions can be powerful drivers of growth and transformation. However, the success of a transaction is rarely determined by the deal itself. Instead, it is determined by how effectively the newly combined organisation operates once the transaction is complete.
For CFOs and executive teams, maintaining focus on integration during the early stages after completion is essential. With clear planning, strong financial oversight, and independent assurance where needed, organisations can ensure that acquisitions deliver the strategic and financial value they were intended to create.
If your organisation has recently completed an acquisition, or is preparing for one, focusing on integration early can make the difference between a deal that simply closes and one that truly delivers lasting value.
For more information on how AssurAcc can support your organisation during the post-acquisition phase, read more about our M&A support services.
To get in touch, please contact us at enquiries@assuracc.co.uk
