Accounting & Tax Acquisitions in Michigan

Doeren Mayhew, a national assurance, tax and advisory firm, has acquired Novotny CPA Group, expanding its West Michigan presence. The integration strengthens Doeren Mayhew’s tax and audit capabilities while bringing Novotny partners and staff into Doeren Mayhew’s Grand Haven and Grand Rapids offices.

Doeren Mayhew, a national assurance, tax and advisory firm, has acquired Grand Rapids-based Benoit & Associates, CPAs, effective June 1, 2025. The deal deepens Doeren Mayhew's tax capabilities and expands its presence in West Michigan; Maurice Benoit joined Doeren Mayhew as a principal and relocated with his staff to the firm's downtown Grand Rapids office.

Prosperity Partners, a Chicago-headquartered accounting platform backed by Unity Partners, has completed the acquisition of Detroit-area tax and accounting firm Cendrowski Corporate Advisors (CCA). The add-on expands Prosperity's tax, valuation and outsourced accounting capabilities and establishes a local presence in the Detroit/Bloomfield Hills market; terms were not disclosed.

Marcum LLP has acquired Croskey Lanni, PC, a Detroit-area accounting firm with an office in Boca Raton, Florida, effective May 1, 2024. The deal brings six partners and more than 50 associates to Marcum, expanding its Midwest presence and bolstering tax, assurance, technology, and financial advisory capabilities.

B. Riley Financial acquired Crawford & Winiarski, a Detroit-based boutique forensic accounting and litigation consulting firm, and integrated the team into B. Riley Advisory Services to establish a dedicated Litigation Support and Forensic Accounting practice in Detroit. The deal expands B. Riley’s financial consulting capabilities, particularly in forensic accounting, litigation support and automotive-industry expertise; financial terms were not disclosed.

E78 Partners has acquired Outliers LLC, a Michigan-based finance and accounting firm that provides interim CFO, FP&A, post-merger integration and turnaround services for private equity portfolio companies. Outliers will join E78's Leadership & Transaction Services business unit to expand E78's capabilities for servicing middle-market PE-backed companies; the deal was backed by E78's sponsor, Further Global. Terms were not disclosed.

IRIS Software Group has acquired Thomson Reuters myPay Solutions to expand its CPA-focused payroll and tax services in the Americas. The deal adds outsourced payroll processing, banking and tax reporting capabilities—serving CPA firms and their SMB clients across the United States—to IRIS' existing accountancy and payroll portfolio.