You will be charged in CAD or USD depending on your billing address. If your billing address is located in Canada, you will be charged in Canadian dollars, and you will be charged tax based on the provincial tax rate of the province in which you are shipping to. If your billing address is in the United States or a country other than Canada, you will be charged in USD and you will not be charged any tax. Depending on the country you are shipping to, duties may or may not apply. We know from experience that there is no duty when shipping to the United States. For duties in other areas, please check with the country in which you are shipping to.