WinRAS - Calculation of Source Deductions and Employer Contributions

To use this service
Purpose of the service

You can use the WinRAS computer program to calculate the following:

  • Source deductions of Québec income tax, contributions to the Québec Pension Plan, and Québec parental insurance plan premiums
  • Employer contributions to the Québec Pension Plan and the health services fund, as well as employer Québec parental insurance plan premiums
  • Employers
  • Individuals in business (self-employed persons)
Conditions for use

Note that this application will not run on a Macintosh operating system.

  • WinRAS must be used in conjunction with the Guide for Employers (TP-1015.G-V). This guide give instructions on how to deduct, remit and report source deductions and employer contributions.
  • The 2016 WinRAS application was updated further to the Budget Speech delivered on March 17, 2016. You must therefore use the 2016.07 version to calculate source deductions of Québec income tax for any pay period beginning after the following dates:
    • May 31, 2016, to take into account the maintenance of the rate of the tax credit for the purchase of shares issued by Fondaction; 
    • June 30, 2016, to take into account the reduction of the health contribution.
  • The 2015.01 version of WinRAS does not contain any tax changes that were announced after December 2, 2014.


To use this program:

  1. Download the WinRAS file to your computer.
  2. Follow the installation instructions.
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