A rounding guideline that has been adopted in other countries, and that
will be adopted by the federal government for cash transactions with
the Canadian public, is:
The calculation of the Goods and Services Tax (GST) or Harmonized Sales Tax (HST) on purchases, whether for cash or non-cash transactions, will continue to be calculated to the penny and added to the price. It is only the total cash payment for the transaction that will be rounded.
For more information, visit: www.budget.gc.ca