The high performance payroll tax modeling calculators.
Calculators by Symmetry are custom paycheck calculators for any gross-to-net calculation need. Intelligent, user-friendly solutions to the never-ending realm of “what-if” scenarios.
The payroll tax modeling calculators, powered by the Symmetry Tax Engine, include federal, state, and local taxes, and benefits and other deductions, and integrate directly into your website or application via an API or widgets.
The full set of paycheck calculators.
Reliable data makes Calculators by Symmetry an indispensable tool, and with over 11 variations of calculators, tax clarity and client satisfaction evolve naturally.
This product’s excellence is defined at the apex of user friendliness and relevant data. Based on user input, Symmetry utilizes geocoding technology to determine the applicable taxation for each individual calculation, providing relevant and timely results.Request a demo today to see if the calculators are the right fit for you.
Interested in multi-state gross-to-net calculations?
Check out the Symmetry Tax Engine.
Advantages of integrating a payroll tax modeling calculator.
Complete customization.
Change the background color, font color, style, or pre‑set values in the widgets or use the API to build a unique interface. A wide variety of options are available for customization depending on your audience. See a sample of the Salary Calculator for free.
"style": {
"labels": {
"font-family" : "Helvetica, Arial, sans-serif",
"font-size" : "14px",
"color" : "#333"
},
"headings": {
"font-family" : "Helvetica, Arial, sans-serif",
"font-size" : "14px",
"color" : "#777"
},jsonCallback({
"model": {
"grossPay": "77777",
"grossPayType": "ANNUALLY",
"grossPayYTD": "10000",
"payFrequency": "SEMI_MONTHLY",
"w42020": true,
"federalFilingStatusType2020": "MARRIED",
"twoJobs2020": false,
"dependents2020": "0",
"otherIncome2020": "0",
"deductions2020": "0"
"additionalFederalWithholding": "100",
"roundFederalWithholding": true,
"exemptFederal": false,
"exemptFica": false,
"exemptMedicare": false,
"state": "IN",
"voluntaryDeductions[0][deductionAmount]": "5"
},
});Flexible functionality.
JSON technology can be used to pre-populate employee data in the calculator fields or modify the calculator relative to your company’s voluntary deductions or other income items. Deductions such as medical insurance and retirement plans can also be created to mirror those items on an employee’s paystub.
Expand engagement.
Add a calculator to your website and drive traffic and repeat visitors while also improving your site’s SEO. Enhance an Employee Self-Service portal and reduce calls to your payroll department. Create as many unique or complex paycheck modeling scenarios as needed.
Who will love it?
- Product Management
"The biggest challenge we faced as an organization was how do we build and maintain a payroll calc engine that supported federal, state, and local calculations at a price point that was both effective and efficient for our business."
The API vs. Widgets.
There are two methods of integration that differentiate this technology - the embeddable widgets and the application programming interface (API).
With a sleek, customizable interface that is lightweight and loads quickly, your employees can access the calculators on any device, and they’ll look and perform great.
API
Build your own interface and call the Calculators by Symmetry API for the paycheck calculations. Quick to implement, the API gives you the most flexibility to design your own payroll calculators.
How API works:
See developer docs to get more information on the API.
{
"content": "Calculators",
"_links": {
"self": {
"href": "http://calculators.symmetry.com/api/calculators",
},
"salary": {
"href": "http://calculators.symmetry.com/api/calculators/salary",
},
"hourly": {
"href": "http://calculators.symmetry.com/api/calculators/hourly",
},
"grossup": {
"href": "http://calculators.symmetry.com/api/calculators/grossup",
},
"bonus-percent": {
"href": "http://calculators.symmetry.com/api/calculators/flatbonus",
},
}
}Widgets
Copy and paste a one-line script tag into your HTML for out-of-the-box paycheck calculators. Great for quick implementation if you like the way our calculators look.
How Widgets work:
See developer docs to get more information on the widgets or contact Symmetry to receive a key to activate the widgets.
| Name | Script |
|---|---|
| Salary | <script async src="https://calculators.symmetry.com/widget/js/salary.js?key=yourKey"></script> |
| Hourly | <script async src="https://calculators.symmetry.com/widget/js/hourly.js?key=yourKey"></script> |
| Gross-up | <script async src="https://calculators.symmetry.com/widget/js/grossup.js?key=yourKey"></script> |
| Flat bonus | <script async src="https://calculators.symmetry.com/widget/js/flatbonus.js?key=yourKey"></script> |
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Try our contact form if you don't find your question answered here.
How often are the Paycheck Calculators updated?
The calculators are updated monthly to ensure you get the most current withholding computations, with interim releases during parts of the year when taxes change more frequently.
How accurate are the Paycheck Calculators?
As the creators of the first online paycheck calculator, we are not satisfied until accuracy is verified to the penny. As such, all calculations are tested exhaustively by our engineers before release. Because payroll systems use different methods to calculate withholding, an answer within 1-5 cents is considered acceptable based on a single work location. For multi-state scenarios, see the Symmetry Tax Engine.
Are the Paycheck Calculators suitable for payroll or tax websites?
Yes. Many service providers (payroll firms, PEOs, staffing companies) use the calculators on their websites. Calculators enrich site content, increase traffic, and are sticky for visitors.
Where can I see more examples of Calculators by Symmetry paycheck calculators?
Symmetry Software has a library of calculator examples available to prospective clients who take the calculators for a spin with our trial. Contact us to get started or for full documentation, read our Calculators by Symmetry developer docs.
Get started.
Looking for more?
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Symmetry Payroll Forms directly integrates and automates the withholding forms process at the federal, state, and local levels with over 125 compliant forms.