Items and Services Tax or GST can be a consumption tax which is charged of many goods and services sold within Canada, no matter where your company is located. At the mercy of certain exceptions, all companies are needed to charge GST, currently at 5%, plus applicable provincial sales taxes. A company effectively represents a realtor for Revenue Canada by collecting the taxes and remitting them with a periodic basis. Companies are also permitted claim the required taxes paid on expenses incurred that report with their business activities.