Short answer Yes, in most cases you do have to allow for GST/HST Long answer Rules on mandatory registration requirements for charities are stated at https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4082/gst-hst-information-charities.html.  If you are required to register, you may be eligible for rebates. Registered charities can claim a rebate of 50% of the GST or federal part of HST paid or payable. Charities resident in a participating province that are not selected public service bodies also qualify for a 50% rebate of the provincial part of HST. Use Form GST66, Application for GST/HST Public Service Bodies' Rebate and GST Self-government Refund to claim the rebate. If you are eligible to claim a rebate as a charity, claim the amount on line 305 of Part E of the application. Detailed information on rebates is available at https://www.canada.ca/en/revenue-agency/services/forms-publications/publications/rc4082/gst-hst-information-charities.html More… The following Canada Revenue Agency links may be useful in understanding particular GST and HST requirements.