Symmetry Tax Engine vs. Paychex

The leading gross-to-net calculation software for payroll. The Symmetry Tax Engine® (STE) is a powerful gross-to-net calculation engine to build or enhance a payroll platform, embed payroll into an existing application, and increase compliance and accuracy. The Symmetry Tax Engine® accounts for federal, state, and local payroll taxes — both withholding and latent employer taxes — for over 7,400 taxing jurisdictions and U.S. territories. Employer taxes and multi-state processing are accounted for as well. STE covers all 50 states, U.S. territories including Puerto Rico, and Canada.

Paychex Flex® is an all-in-one HR platform built to help businesses hire, pay, manage, and retain employees all from a single interface. Designed to grow alongside your organization, Paychex Flex combines intelligent technology with flexible support to simplify the full scope of human resource management. At the core of the platform is a connected suite of payroll, HR, benefits, and workforce management tools. Paychex Flex automates routine administrative tasks from payroll processing and tax management to benefits enrollment and scheduling.