Private capital fuels rapid transformation of US accounting and consulting sector

Private capital is remaking the US accounting and consulting profession at speed, turning a once‑hesitant market into a core target for buy‑and‑build strategies that pair recurring compliance work with higher‑margin advisory services.

Investors have moved from tentative minority stakes to complex, scale‑oriented transactions as advisory work, M&A support, finance transformation, cybersecurity, risk consulting and AI integration, has become the primary growth engine. According to Houlihan Lokey bankers Matthew Dodd, Patrick Hughes and Shivan Arora, more than $50 billion of capital has flowed into the sector since 2020, and valuation expansion is now outpacing revenue growth as firms deploy technology and branded, repeatable solutions to broaden margins and client reach.

The sector’s fragmentation is central to the investment thesis. With tens of thousands of CPA practices nationwide, private equity sees ample roll‑up opportunity to construct national platforms. Recent high‑profile deals cited by industry advisors, such as New Mountain Capital’s backing of Grant Thornton Advisors and Blackstone’s purchase of Citrin Cooperman, illustrate growing confidence in platform playbooks and clearer exit pathways, including PE‑to‑PE secondaries and continuation vehicles.

Data and industry reports paint a consistent picture of intensifying activity. S&P Global Market Intelligence found that global deal value for accounting, auditing and taxation firms reached $6.31 billion in the first 11 months of 2024, the highest level since at least 2015, driven by the sector’s predictable, recurring revenues. Consultancy and advisory boutiques and mid‑tier firms have attracted particular interest as they scale regionally and invest in technology to compete for national mandates. Capstone Partners, which advised on recent transactions, notes accelerating private equity interest carrying into 2025 as sponsors help firms shore up balance sheets for M&A, retain talent and professionalise operations.

Artificial intelligence has sharpened the opportunity. What began as pilot projects is becoming embedded infrastructure: tax research, document review, workflow automation and analytics are being automated to produce reusable intellectual property and standardised product offerings, automated reporting packs, compliance modules and portfolio‑readiness dashboards among them. PwC and Deloitte’s multi‑billion‑dollar AI commitments underscore how large firms are racing to embed generative AI across client services, a trend that investors and acquirers expect to accelerate value creation in portfolio companies.

Deal structures have evolved to reflect regulatory constraints and operational realities. US independence rules restrict outside ownership of audit practices, prompting buyers and sellers to adopt separated practice models where attest services remain under CPA control while advisory, tax and technology operations are governed through distinct entities. Minority growth investments, platform mergers and continuation vehicles are now commonplace, enabling firms to access capital for technology, shared services and roll‑up execution while preserving audit independence. The American Institute of Certified Public Accountants and the Securities and Exchange Commission remain active in scrutinising firm structures, governance and quality systems.

Operational integration is the principal execution risk. Combining firms requires harmonised methodologies, robust data governance, consistent quality controls and careful cultural alignment as partnership governance adapts to performance frameworks more typical of private equity backing. Investors stress the need for scalable shared services and defensible sector specialisms, government contracting, regulated industries and disaster‑recovery capabilities have emerged as attractive, contract‑backed advisory niches.

Not all accounts align exactly on scale. A sector timeline compiled by industry observers reports more than 90 deals between 2020 and 2025 with an aggregate value cited at around $200 billion, highlighting the breadth of activity when strategic combinations and sponsor‑to‑sponsor transactions are included. Such figures sit alongside more conservative measurements of annual deal flows, but together they convey a rapid maturation of the market and the diversity of capital inflows.

Looking ahead, winners will be those that combine deep domain expertise with technology‑driven, repeatable offerings and rigorous quality frameworks. According to practitioners and advisers, select advisory assets could command multiples approaching premium levels as buyers prize unified, AI‑enhanced platforms able to deliver consistent outcomes at scale. Internationally, similar dynamics are emerging in Europe, where sponsors are targeting aging partnership models and rising advisory demand to create cross‑border consolidated practices.

Private equity’s footprint in accounting and consulting has moved from novel to mainstream. For firms, the strategic choice is stark: embrace capital‑backed transformation to accelerate technology, M&A and talent programmes, or risk being squeezed by consolidators building national, tech‑enabled advisory franchises. Those that successfully combine disciplined governance, branded products and embedded AI will help define the profession’s next chapter.