Paychex

Paychex, Inc. is an American company that provides human resources, payroll, and employee benefits outsourcing services for small- to medium-sized businesses. Founded in 1971 and headquartered in Rochester, New York, the company has more than 100 offices serving approximately 800,000 payroll clients in the U.S. and Europe. Paychex is ranked 681st on the Fortune 500 list of largest corporations by revenue.

Paychex was founded in 1971 by Tom Golisano, who started the company with only $3,000.

The operation grew to include 18 franchises and partnerships, which were eventually consolidated into one private company in 1979. In 1983, the company (ticker symbol: PAYX) became a public company via an initial public offering.

Paychex acquired Pay-Fone in 1995. In 1996, the company acquired Olsen Computer Systems and National Business Systems.

Between 2002 and 2003, it acquired Advantage Payroll Services, Interpay, and Time in a Box, followed by Time in a Box's parent Stromberg in 2004.

The company purchased Hawthorne Benefit Technologies in 2007, SurePayroll, Inc. in 2010, and ePlan Services in 2011. It Icon Time Systems and ExpenseWire in 2012 for an undisclosed amount. Between 2013 and 2017, it purchased myStaffingPro NETtime solutions Advance Partners, and Human Resources Outsourcing, Inc.

Rochester Democrat and Chronicle named Paychex one of the Best Places to Work in Rochester in 2016.

It acquired Lessor Group 2018. That year it also acquired Oasis for a reported $1.2 billion.