A fundamental principal of GST/HST is that no tax should be incorporated into the cost of inputs that registrants use in commercial activities. With certain exceptions, registrants are entitled to a refundable credit, called an input tax credit (ITC), for tax paid or payable on purchases that relate to a commercial activity.
Commercial activities include the supply of goods and services taxable at 0%, 5% and 13%. Commercial activities do not include the supply of exempt goods and services, such as long-term residential rent (for example, of one month or more). Therefore, you cannot claim ITCs for the GST/HST you paid or owe on items that you use to provide exempt goods and services, or for personal use.
You can recover the GST/HST you pay or owe on goods and services you use in operating a business of making taxable supplies. Examples are:
Where goods or services are used partly for personal use or for making exempt supplies, you are entitled to a partial ITC to the extent that they are for use in commercial activities, with certain exceptions for capital property, as discussed below.
Expenses for which you cannot claim an ITC include the following:
For more information, see the General Information for GST/HST Registrants guide.
Most registrants claim their ITCs when they file their GST/HST return for the reporting period in which the related purchases were made. If you do not claim ITCs at that time, you have four years after the end of that reporting period to claim them on a GST/HST return.
When you calculate your ITCs, you can include purchases for which you have received an invoice, but that you have not yet paid.