Capstone Partners’ latest Accounting Services M&A Update reports that the Accounting Services sector has faced a significant supply/demand imbalance, in which labor shortages have necessitated innovative growth strategies to meet rising demand. While all U.S. public companies are required by the U.S. Securities and Exchange Commission (SEC) to receive an annual independent audit, the private sector has increasingly depended on accounting firms to navigate tax reforms from the One Big Beautiful Bill—which largely targeted businesses and high-net-worth (HNW) individuals. As a result, accounting firms have increasingly broadened offerings to bolster cross-selling opportunities and capitalize on the sector’s ample white space. These ambitions provide a favorable outlook for Accounting Services sector merger and acquisition (M&A) growth throughout 2026, which is expected to build on the gains witnessed in 2025.
Accounting services M&A spiked 26% year-over-year (YOY) to a record 194 transactions announced or completed in 2025. Sector M&A volume has continued to climb year to date (YTD), rising 14.8% YOY to 62 deals. Robust transaction activity has been supported by participants’ ability to showcase stable cash flows, significant client retention, and strong financial projections. In addition, buyers in the space have increasingly rolled up accounting firms with service and end market specialization to bolster cross-selling opportunities for tax, audit, and advisory offerings. Strategic buyers have historically led accounting services M&A activity due to Association of International Certified Professional Accountants regulations requiring certified public accountant (CPA) shops to be majority owned by licensed CPA professionals. However, this trend has reversed YTD as sponsors have increasingly utilized the alternative practice structure to penetrate the space. To date, financial acquirers have accounted for 54.8% of accounting services M&A compared to 38.9% in the prior year period, with deal volume spiking 69.1% YOY.
Sponsor capital raising for Accounting Services-focused funds rebounded from 2024’s deep decline in 2025 and has continued to trend upwards in YTD 2026. Total private equity (PE) capital raised for sector-specific funds has risen 16.1% YOY to $12.7 billion YTD. Buyout funds have comprised the majority (87.9%) of PE capital raised in the sector to date, which bodes well for accounting services M&A activity throughout the year. In addition, the median size for Accounting Services-focused funds has increased 23.6% YOY to $581 million through YTD 2026. This indicates that sponsors may move up market for platform transactions or further accelerate add-on dealmaking.
“Technology transformation has become a strategic requirement in accounting services M&A, not a value enhancer. Investors are weighting AI readiness, organic growth quality, and operational discipline more heavily than market size or M&A runway, reflecting a shift toward firms that can deploy capital to improve delivery, scale efficiently, and expand into higher-value advisory services—a compelling opportunity for those well positioned and thoughtfully prepared,” said Capstone Director Erik Larson, the lead contributor in the newly released report.
Capstone Partners’ Business Services Investment Banking Team provides M&A, capital formation, and financial advisory services to the owners of middle market businesses in the Accounting Services sector. Our team partners with leading mid-to-large sized businesses that serve growing end-markets.
For more information on the Accounting Services M&A trends featured in this report or to speak with one of our Business Services M&A Team members about how to grow, value, and/or sell your company, we are here to help. Contact us today.
