TaxCalcs by TaxJar

Customer Experience

Calculates the correct amount of sales tax from the purchase of your customers. 



This product is electronically distributed. By purchasing it you accept our refund policy.

Buy together

TaxCalcs by TaxJar
Pay with Amazon add-on for CS-Cart
Pay with Amazon
Facebook Pixel for CS-Cart
Facebook Pixel

Price for all:




The add-on is developed for the USA and Canada. 

A TaxJar account must be created to use the add-on.

Please check the prices of TaxJar at https://www.taxjar.com/pricing/




Make sales tax calculation simple and accurate.


The add-on integrates your store with the TaxJar service that allows you to calculate the taxes automatically for the state, county, city and special taxing district level. The taxes database of the service is regularly updated, so no worries about the sales tax calculation accuracy anymore. 


Do you sell products that are taxed differently from state to state? TaxJar handles all that sales tax complexity so you never have to worry about it.



Key features


Accurate tax calculation for the USA and Canada.

— Easy to use Tax information calculator will allow you to estimate the amount of tax for the product and its shipment.

— Your vendors may use their own TaxJar account API key. It means that TaxJar transactions will be counted separately for your and their accounts.

— You can use a different API key for each storefront.


What your customers will see


The category page


The product details page



The checkout page



What you will see in the admin panel


The fast Tax information calculator



The pop-up with Tax information




The add-on’s settings (Multi-store)




The add-on’s settings (Multi-vendor)





The TaxJar API key setting on the Editing storefront page



The TaxJar API key setting on the Editing vendor page



User Guide



Learn more about the add-on in our User Guide.

Explore the TaxJar video tutorial to know more about the signing up in the TaxJar.




The add-on is compatible with CS-Cart and Multi-Vendor 4.3.1 and above. 

Need compatibility with another CS-Cart version? Contact us now.




This add-on is developed and published by Simtech Development Ltd., a CS-Cart developer. You are guaranteed a quality add-on supported by future versions. If you need help, please contact us via our help desk system.

4.3.7 4.x or 3.x From 3.x or 4.x to 4.3.7 4.3.7 2.2.4 2.x From 2.x to 4.3.7 4.3.7 2.2.4 sp4 1.3.5 1.x From 1.x to 4.3.7 Before After The average time of loading a category page: 1 sec. 5 sec. ! CS-Cart" class="cscart-1" d="M499.358,3808.1a1.552,1.552,0,1,1-1.552-1.58A1.566,1.566,0,0,1,499.358,3808.1Zm-16.5.69a9.429,9.429,0,0,1-3.89.8c-4.085,0-6.744-2.81-6.744-7a6.95,6.95,0,0,1,7.276-7.32,7.647,7.647,0,0,1,3.414.74l-0.56,1.9a5.993,5.993,0,0,0-2.854-.65c-3.106,0-4.785,2.35-4.785,5.19,0,3.17,2.014,5.12,4.7,5.12a7.006,7.006,0,0,0,3.022-.65Zm2.484-2.04a6.823,6.823,0,0,0,3.275.97c1.763,0,2.6-.88,2.6-2.04,0-1.19-.7-1.82-2.49-2.5-2.463-.9-3.61-2.24-3.61-3.88,0-2.21,1.79-4.03,4.673-4.03a6.149,6.149,0,0,1,3.3.86l-0.588,1.81a5.2,5.2,0,0,0-2.77-.82,1.959,1.959,0,0,0-2.239,1.87c0,1.13.784,1.64,2.547,2.35,2.322,0.88,3.554,2.07,3.554,4.11,0,2.44-1.875,4.14-5.037,4.14a7.609,7.609,0,0,1-3.806-.97Zm26.471,2.04a9.419,9.419,0,0,1-3.889.8c-4.086,0-6.744-2.81-6.744-7a6.95,6.95,0,0,1,7.275-7.32,7.649,7.649,0,0,1,3.415.74l-0.56,1.9a6,6,0,0,0-2.855-.65c-3.106,0-4.785,2.35-4.785,5.19,0,3.17,2.015,5.12,4.7,5.12a7.007,7.007,0,0,0,3.023-.65Zm12.681-2.8a23.386,23.386,0,0,0,.195,3.29h-2.21l-0.2-1.73H522.2a5.044,5.044,0,0,1-4.142,2.04,3.884,3.884,0,0,1-4.141-3.94c0-3.32,2.91-5.13,8.143-5.1v-0.29c0-1.1-.308-3.17-3.078-3.14a6.479,6.479,0,0,0-3.554,1.02l-0.56-1.67a8.671,8.671,0,0,1,4.477-1.2c4.142,0,5.15,2.87,5.15,5.59v5.13Zm-2.379-3.71c-2.687-.06-5.737.42-5.737,3.08a2.168,2.168,0,0,0,2.295,2.38,3.42,3.42,0,0,0,3.33-2.29,2.841,2.841,0,0,0,.112-0.79v-2.38Zm6.4-2.44c0-1.62-.028-3.01-0.112-4.28h2.155l0.112,2.72h0.084a4.114,4.114,0,0,1,3.778-3.01,4.662,4.662,0,0,1,.671.06v2.35a4.271,4.271,0,0,0-.839-0.05,3.443,3.443,0,0,0-3.3,3.17,7.587,7.587,0,0,0-.084,1.16v7.32h-2.463v-9.44Zm11.958-7.57v3.29H544v1.9h-3.526v7.39c0,1.7.476,2.67,1.847,2.67a4.644,4.644,0,0,0,1.427-.17l0.112,1.9a6.639,6.639,0,0,1-2.183.34,3.5,3.5,0,0,1-2.658-1.05,5.426,5.426,0,0,1-.952-3.6v-11.93Z" transform="translate(-410 -3766)"/> Before After The average loading time for home page: 0.75 sec. 20 sec.