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Symmetry Tax Engine

symmetry.com

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Spec score 8.2 #16 of 105 in Tax Compliance Software

What it is

Symmetry Tax Engine calculates gross-to-net payroll taxes for software platforms, payroll providers, employers, and payment companies. It covers federal, state, local, and employer taxes across all 50 U.S. states, U.S. territories including Puerto Rico, and Canada, with calculations for more than 7,000 jurisdictions. Listed tax types include federal withholding, FICA, paid family and medical leave, unemployment and disability taxes, benefits and pre-tax benefit rules, and local taxes such as city, county, school district, and municipality taxes. Deployment is available as a hosted Web API or an on-premise SDK installed in a customer’s environment. The API supports JSON and XML; the SDK supports Windows, Linux, and macOS, with interfaces including C/C++, Java, .NET, .NET Core, and Delphi. The paid product has no free plan, offers a trial by contacting Symmetry, and has pricing on request. Symmetry is headquartered in Scottsdale, Arizona, and was founded in 1984.

Spec sheet

Purpose
Symmetry Tax Engine is a gross-to-net payroll tax calculation engine for building, embedding, and scaling payroll platforms.Read 10 Oct 2026 · symmetry.com
Intended users
Symmetry lists software developers, payroll or HR service providers, large employers, payroll managers, entrepreneurs, and payment companies as potential users.Read 10 Oct 2026 · symmetry.com
Deployment
The engine is available as a hosted Web API or an on-premise SDK installed in the customer's local environment.Read 10 Oct 2026 · symmetry.com
Free plan
NoRead 20 Sep 2026 · symmetry.com
Trial
The product FAQ invites prospective customers to contact Symmetry to learn about its free trial; it does not state a trial duration.Read 10 Oct 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com
Support
Symmetry says support includes help with tax accuracy, jurisdiction questions, API and SDK integrations, onboarding, and filing guidance.Read 10 Oct 2026 · symmetry.com
Headquarters
Scottsdale, Arizona, United StatesRead 28 Sep 2026 · symmetry.com
Founded
1984Read 28 Sep 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com
API access
YesRead 20 Sep 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com
Jurisdictions covered
7000Read 20 Sep 2026 · symmetry.com
Performance and uptime
The product page reports an average calculation time of 3.32 milliseconds and 99.99% uptime.Read 10 Oct 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com
Supported tax types
Federal withholding; FICA; paid family and medical leave; SDI/VDI/employee SUI; courtesy withholding; FUTA; SUTA; benefits and pre-tax benefit rules; city; county; school district; municipality; earned income; privilege; local services; JEDDs/JEDZRead 20 Sep 2026 · symmetry.com
Tax coverage
It covers federal, state, local, and employer taxes across all 50 U.S. states, U.S. territories including Puerto Rico, and Canada.Read 10 Oct 2026 · symmetry.com
Tax jurisdictions
The product calculates taxes for over 7,000 taxing jurisdictions.Read 10 Oct 2026 · symmetry.com
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.Read 10 Oct 2026 · symmetry.com

Plans and prices

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

Every Symmetry Tax Engine plan and price →

Strong points and limits

Strong points

  • Covers more than 7,000 tax jurisdictions
  • Supports U.S., territories, and Canada
  • Available as hosted API or on-premise SDK
  • API supports JSON and XML
  • Trial available by contacting Symmetry

Limits

  • No free plan
  • Pricing is available on request

Who it suits

It suits developers and organizations building payroll systems that need calculations across many tax jurisdictions. The hosted API and on-premise SDK offer different deployment options.

Verdict

The engine specifies broad jurisdiction and tax-type coverage, along with API and SDK deployment choices. Buyers will need to request pricing and contact Symmetry about the trial.

Where Specifiction places it

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