No. 62of 109 ·Tax Compliance Software

Symmetry Tax Engine

Web · Windows · Mac · Linux · Self-hosted · API

Freedom report

Two barsScore 5.7

Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

Symmetry Tax Engine is ranked #62 of 109 in tax compliance software on Freedom251, made by Symmetry Tax Engine (Scottsdale, Arizona, United States). It runs on API, Linux, macOS, Self-hosted, Web, Windows. A free trial is offered.

Symmetry Tax Engine plans and pricing

All plans

Symmetry Tax Engine Tailored pricing based on product needs and usage; tax updates, implementation, and support included symmetry.com · 10 Oct 2026

Compared on tax compliance software

Free plan: No

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The record

Jurisdictions covered: 7000
API access: Yes
Purpose: Symmetry Tax Engine is a gross-to-net payroll tax calculation engine for building, embedding, and scaling payroll platforms.
Tax coverage: It covers federal, state, local, and employer taxes across all 50 U.S. states, U.S. territories including Puerto Rico, and Canada.
Tax jurisdictions: The product calculates taxes for over 7,000 taxing jurisdictions.
Deployment: The engine is available as a hosted Web API or an on-premise SDK installed in the customer's local environment.
Interfaces and operating systems: Its technical information lists JSON and XML for the Web API and SDK, plus SDK support for Windows, Linux, and macOS.
Updates: The on-premise SDK is released monthly with interim releases when tax changes are more frequent, and Web API updates are released more frequently.
API security and data: The product page says API communications are encrypted in transit and the engine does not store personal data; it stores anonymized usage metrics.
Security compliance: Symmetry says it is SOC 2 Type 2 compliant and lists TLS 1.3 for data in transit and AES-256 encryption at rest in AWS.
Integrations: The Web API supports secure HTTPS with JSON and XML, while the SDK offers interfaces including C/C++, Java, .NET, .NET Core, and Delphi.
AI tools: The product page describes an MCP interface for querying the production tax engine from Claude, Cursor, Copilot, and ChatGPT; it is read-only by design.
Support: Symmetry says support includes help with tax accuracy, jurisdiction questions, API and SDK integrations, onboarding, and filing guidance.
Performance and uptime: The product page reports an average calculation time of 3.32 milliseconds and 99.99% uptime.

Where it ranks on Freedom251

Best Tax Compliance Software in 2026#62 of 109
Best Payroll Tax Software in 2026#21 of 30

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Sources

symmetry.com/symmetry-tax-engine· checked 20 Sept 2026
symmetry.com/security· checked 10 Oct 2026
symmetry.com/support· checked 10 Oct 2026
symmetry.com/pricing· checked 10 Oct 2026