Paychex provides human capital management (HCM) software and services to small and medium-sized businesses, primarily in the U.S. The company manages mission-critical functions including payroll processing, tax filings, and regulatory compliance. Paychex calculates paychecks and remits payroll taxes for clients who often lack dedicated HR departments. Beyond core payroll, Paychex sells an integrated suite of modules for benefits administration, retirement plans, talent acquisition, and workforce management. The company also operates a Professional Employer Organization (PEO) to manage insurance and compliance through a co-employment model. Paychex reports two segments: Management Solutions, which includes the SurePayroll, Paychex Flex, and Paycor platforms, and PEO and Insurance Solutions. The business model relies on recurring service fees and per-employee charges, supplemented by interest earned on client funds held in transit. Growth strategy focuses on expanding revenue per client through cross-selling, moving upmarket into the enterprise segment via its acquisition of Paycor, and utilizing its WISE AI platform to automate tasks. Paychex generates sales through a direct sales force and a referral network of CPAs and financial institutions. Recent modularization of its software allows Paychex to sell products like retirement plans and insurance independently of its core payroll engine.