After the Deal Is Done: Why Legal Teams Are Forgotten in Post-M&A Integration — and in Other Major Transformations Too

Once a deal closes, leadership attention and investment shift rapidly to revenue-critical priorities such as partner integration, client transition, compensation harmonisation and the alignment of large business units where efficiencies can deliver rapid cost take-out. 

Smaller functions such as legal, or risk and compliance — not typically positioned as value-generating functions — therefore receive proportionally less post-deal investment and leadership attention.  

At the same time, many of the external advisers supporting the transaction, including external legal counsel, step back, having fulfilled their role in getting the deal over the line. In parallel, in-house legal teams often face resourcing constraints — including headcount reduction or restructuring — reducing capacity precisely as legal, regulatory and contractual complexity and risks peak. 

And mergers are not the only point at which legal can be overlooked when it comes to investment. Other periods of significant change — including restructurings, carve-outs and large-scale transformation programmes — can place similar pressure on legal teams, as complexity increases faster than capacity and sustainable change becomes difficult to deliver.

Making the Case for Investment in Legal Teams 

Industry analysis suggests that post-merger integration typically requires additional investment of around 5–15% of deal value when considered holistically, including systems, people and operating changes.

In practice, a core part of our work as strategy and technology consultants to in-house legal teams is helping legal leaders articulate a clear, evidence-based case to central management for why legal and compliance functions need access to a portion of this investment — not as a cost, but as a critical enabler of risk management and effective change delivery. 

High-Impact Initiatives for Legal Teams 

Closing the support gap rarely requires a wholesale transformation programme. What legal teams most often need is targeted, time-bound intervention focused on stabilising risk, enabling change and relieving pressure during peak transition. This typically takes the form of the following high-impact initiatives: 

1. Contract & Obligation Transition Support 

After a merger, organisations often inherit large, disorganised contract portfolios — spanning vendor agreements, leases, employment contracts, NDAs and more — stored across disparate systems, formats and teams. Legal functions frequently require sustained support to identify, prioritise and manage the contractual risk created by organisational change. 

2. Legal Technology & Data Transition 

More organisations are now deploying AI in the later stages of the deal cycle — including execution, integration and post-deal learning — placing growing pressure on legal teams to follow suit. Bain’s 2026 M&A Report indicates that AI adoption in M&A more than doubled in 2025, with 45% of executives reporting reliance on AI tools and around one-third systematically deploying them, including for integration-related activities. This creates a critical need to address existing technology estates: rationalising, integrating or stabilising legacy systems and data where the operating environment has materially changed.  

3. Legal & Compliance Operating Model Design 

Another major challenge following a merger is the restructuring of roles and reporting lines as organisations consolidate functions. Designing clear, workable operating models for legal and compliance teams is essential, particularly during mergers, restructurings or major transformation programmes.  

4. Regulatory & Compliance Operationalisation 

Translating regulatory and compliance obligations into practical controls, workflows and governance that the business can actually use. By embedding compliance into contracts, procurement and operational processes, legal teams can move beyond policy and advisory work to enable consistent, day-to-day execution. 

With 80% of respondents to a Bain & Co report in early 2026 expecting increased or sustained M&A activity this year, the pressure on in-house legal teams is only set to grow. Konexo is therefore braced to support legal functions through these periods of heightened complexity. We combine operating model, technology and data expertise with interim legal resourcing and managed services to support in-house legal teams precisely where complexity peaks and capacity is most constrained. 

This article has been published as part of Konexo Insights: AI, legal transformation, post M&A integration and flexible in-house legal resourcing.