Symmetry Developer Docs & Guides: Tax Engine, Payroll Forms, I-9 & Wage APIs

Our hope is that you will find quick and easy access to our documentation to assist you in getting up and running with Symmetry Software products.

Symmetry Tax Engine

Payroll processing and tax calculator to build or enhance a payroll platform, embed payroll into an existing application and increase compliance and accuracy.
Basic concepts Tax Logic API NEW!
Symmetry Guides

NEW! Pairs verified tax rates with step-by-step filing protocols and AI-powered search.
Overview
Symmetry Payroll Forms

Directly integrate and automate the withholding forms process at the federal, state, and local levels with over 130 compliant forms.
Overview Hosted API
Symmetry I-9

Automate Form I-9 compliance for seamless remote and in-person onboarding.
Overview
Symmetry Payroll Point

Identify and accurately determine complex state and local taxes based on a work and residential address.
Overview Portal API
Symmetry Minimum Wage Finder

Integrate minimum wage rates by exact location coordinates directly into your application.
Portal API Guide
Calculators by Symmetry

Over 11 embeddable payroll tax modeling calculators for any gross-to-net calculation need.
Widgets API

Symmetry Tax Engine