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System Requirements for TaxCalc

Article ID: 2066
Last updated: 14 Oct, 2020

TaxCalc is either ‘fully supported’, ‘partially supported’ or ‘unsupported’ running on the configurations of operating system as listed here. 

Fully supported

TaxCalc is optimised to work on the specified versions of these operating systems and all releases are tested on them. Please note those marked with a * have additional information below.

Microsoft Windows

  • 10
  • 8(*) / 8.1
  • 7 (Service Pack 1) (*)
  • 2008R2 (2008 before R2 is not supported)
  • SBS Server 2011
  • Server 2012
  • Server 2016

Apple Mac (64-bit Intel processors only)

  • 10.15 Catalina (**)
  • 10.14 Mojave
  • 10.13 High Sierra
  • 10.12 Sierra (*)


  • 64 bit kernel 3.10 (or higher), Debian (e.g. Ubuntu) or Redhat based distributions
  • Graphical user interface (GUI)
  • Office productivity software (for Word and Excel exports)

We fully support customers with TaxCalc queries encountered when running on these configurations and we endeavour to correct any issues that emerge.

Appropriate hardware is required to run any operating system.

Partially supported

* Please note that the operating systems below are no longer supported by Microsoft or Apple, or support is soon to end. Whilst they are currently supported by TaxCalc, this cannot be guaranteed and is on a best efforts basis. TaxCalc would strongly recommend upgrading your operating system if you are using one of the following:

  • Windows 7 - Microsoft support ends 14th Jan 2020
  • Windows 8 - Microsoft support ended Jan 2016 (Windows 8.1 is still fully supported)
  • Max OSX 10.12 Sierra - Apple support ended Oct 2019

** Catalina users may experience a message saying that Apple cannot check the application. In this case please refer to our Knowledge Base article, Issues installing TaxCalc on Catalina.

Pending Changes

Apple Mac (64-bit Intel processors only)

  • 11.00 Big Sur
    • please note that Big Sur is currently in a public beta stage of the release.

TaxCalc v11.10.004 will not currently work on the Public Beta version of Big Sur. Our development team are currently reviewing the new Mac OS to confirm what changes are need. As such, we do not have a fixed timescale for this as yet and we would recommend holding off updating to Big Sur, unless you have an alternative computer you can access TaxCalc with. Our case reference for this is PROD-4674, which you can use to contact support for an update.


For more information on our unsupported operating systems, please see our Knowledge Base article for Retired Operating Systems

These operating systems may no longer be supported by their suppliers making them vulnerable to security threats and we strongly recommend that all customers move to a fully supported platform immediately.

Program Compatibility

  • The Encrypted PDF module is not compatible with Mac or Linux operating systems.
  • Mac and Linux machines can act as clients connecting to the server and CloudConnect versions of TaxCalc, but cannot currently act as the "server machine" for TaxCalc.

Additional Requirements

  • A PDF viewer such as Adobe Reader 9.0 or higher (Adobe Reader 11.0.06 or above is required for Windows 8/8.1 and Windows 10).
  • Microsoft Office 2010 or higher (*excluding Office365) for export and Mail Merge features.
    • Microsoft retired support for Office 2007 on 10 October 2017. Following this, our support of Office 2007 is on reasonable endeavours only.
    • *Office365 is not currently a supported operating system
  • An internet connection to allow the product to be licensed to you, receive updates and file online.
  • A minimum screen resolution of 1024 x 768.
Article ID: 2066
Last updated: 14 Oct, 2020
Revision: 54
Views: 7968
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