By Boyd O'Rourke
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March 30, 2026
Mergers and acquisitions within the accounting firm industry continue to accelerate, driven by succession planning needs, technology investment, talent constraints, geographic expansion, and the pursuit of new service lines. The pace and volume of transactions is being fueled, in large part, by private equity investment in the accounting firm space. Yet as deal activity accelerates, so does a critical reality: the long term success of an acquisition is determined well before the transaction closes—and long after the announcement is made. Experience across the profession shows that insufficient due diligence and poorly executed post acquisition integration are the most common sources of value erosion in accounting firm transactions. What the Regulator is saying and How JGA sees it At the AICPA December 2025 conference on Current SEC and PCAOB Developments, common topics were the presence of private equity in the accounting firm space and the opportunities and challenges that come with this investment. As it relates to private equity, then-acting PCAOB Chair George Botic noted that while these investments have the potential to enhance audit quality by increasing firm capacity and modernizing audit tools with advanced technologies, the presence of private equity presents a risk that firms shift incentives to prioritize profitability over audit quality. Mr. Botic stated, “Both AI and private equity investments in accounting firms carry the potential to truly reshape the profession. Yet these opportunities come with clear challenges to ensure that overreliance on AI and the pressures of private equity do not jeopardize audit quality.” At JGA, we expect the PCAOB to increase its inspection focus on a firm’s system of quality management. To the extent that acquisitions present quality risks to a firm, we expect increased attention from the PCAOB in terms of how firms are managing these risks. Due Diligence: Looking Beyond the Numbers Financial performance, partner buy ins, and deal structure naturally receive significant attention during an acquisition. However, professional services firms—particularly those providing audit and assurance services—certain of the greatest risks often reside outside the financial statements. Effective accounting firm due diligence must assess not only what the target firm has earned, but how it has earned it—and whether that performance is sustainable. This includes gaining a deep understanding of: Audit quality history, including inspection and peer review results, Independence, ethics, and regulatory compliance practices, Industries served, industry concentration and related expertise, Client concentration, retention trends, and engagement risk profiles, Partner governance, compensation alignment, and succession readiness, Technology platforms, data security, and scalability, and Firm culture, leadership dynamics, and decision making processes. When these areas are not rigorously evaluated, issues frequently surface after the transaction closing—when remediation is more disruptive, more expensive, and far more visible to regulators, clients, and staff. The Risks of Inadequate Due Diligence Inadequate diligence often leads to unanticipated post transaction challenges, including: Regulatory findings related to legacy engagements, Independence violations requiring retroactive remediation, Client attrition driven by service disruption or cultural misalignment, Talent loss stemming from unclear expectations or compensation inequities, and Technology incompatibilities that impair efficiency and data integrity. Deficiencies inherited through acquisition can affect inspection outcomes, firm reputation, and overall audit quality long after the transaction closes. Integration: Where Value Is Created—or Lost Even when due diligence is performed thoughtfully, post acquisition integration remains the most common point of failure. Integration is often underestimated, treated as an operational exercise rather than a strategic initiative requiring sustained leadership attention. Successful integration goes far beyond combining systems or standardizing branding. It requires deliberate alignment across how the firm operates, governs itself, and delivers quality—particularly in areas such as: Audit methodology and documentation standards Quality management systems and monitoring processes Partner roles, authority, and accountability Talent development, evaluation, and retention Communication with clients, regulators, and staff Absent a structured integration plan, firms risk operating as a collection of semi independent practices rather than a cohesive organization. This fragmentation can undermine consistency, weaken accountability, and complicate regulatory compliance. A Strategic Imperative in a Changing Profession As consolidation continues and regulatory scrutiny intensifies, rigorous due diligence and disciplined integration are no longer optional. They are essential to managing risk, sustaining quality, and realizing the full value of a transaction. For accounting firm leaders, the message is clear: growth through acquisition can be a powerful strategy—but only when supported by a comprehensive understanding of what is being acquired and a deliberate plan for how the combined firm will operate as one. Firms that treat diligence and integration as leadership imperatives—rather than transactional steps—are better positioned to protect audit quality, retain talent, and preserve client trust while achieving growth objectives. JGA’s Role Guiding Firms through these Opportunities For firms seeking to grow through acquisition without sacrificing quality, control, or visibility, JGA is a solution. JGA is uniquely qualified with deep experience working with accounting firms on quality management, governance, and operational transformation. We have proven due-diligence tools built that are designed to be practical, adaptable, and immediately usable—while also supporting long term consistency as firms pursue multiple acquisitions over time. Ready to get started or need help refining your acquisition activities? Contact your JGA audit quality expert today to schedule a consultation and ensure acquisition activities are tailored to your firm’s needs.