Paychex has been running payroll since 1971 and today supports roughly 800,000 businesses, from one-person shops to enterprise contractors. For HVAC companies, Paychex hits a sweet spot that pure small-business tools miss: it can handle a 3-person residential shop on Paychex Flex Essentials, but it also supports the complex scenarios larger HVAC contractors run into - certified payroll for prevailing-wage jobs, multi-state tax, union dues and fringe benefits, workers' comp integration, 401(k) administration, and garnishments.
Owners typically like Paychex for three reasons. First, tax filing is done for them across federal, state, and local jurisdictions, including quarterly and annual forms. Second, dedicated specialists help with setup and recurring questions, which matters when an HVAC owner is also the dispatcher, HR lead, and head of sales. Third, Paychex's broader HR bundle - Paychex HR Services, benefits, retirement plans, applicant tracking, and learning management - lets a growing HVAC company consolidate vendors as headcount climbs from 10 to 100+ technicians.
The flip side is that Paychex is a sales-led, quote-based product. Published pricing is limited, which makes comparison shopping harder than with Gusto or QuickBooks Payroll. For shops running ServiceTitan, Housecall Pro, or FieldEdge, Paychex integrates via Paychex Flex and a growing marketplace, and SurePayroll by Paychex offers a self-service option at a lower price point for very small HVAC shops.