How much does it cost to get a HST number in Ontario? An Ontario HST number is the same federal CRA GST/HST account used across Canada, and CRA’s registration page does not list a fee for it. In Ontario, registering a business name costs $60 and incorporating a business corporation costs $300; both are separate from the CRA account.
Separate possible costs
- CRA GST/HST account: no fee is published on CRA’s registration page.
- Ontario business name registration (sole proprietorship or partnership): $60, online or by mail.
- Ontario business corporation incorporation: $300, online or by mail.
- Adviser service: an optional third-party charge.
Register through the CRA
An ordinary taxable Ontario sale of $100 before tax generally has $13 HST, since Ontario’s HST rate is 13%, subject to the actual supply and place-of-supply rules. For the registration steps themselves — effective date, business details, Business Registration Online — see how to get an HST number in Ontario and Business Registration Online. For the full federal cost breakdown, see what GST registration costs.
Sources, checked 2026-10-21: CRA registration route; CRA rates and place of supply; Ontario, cost and time to register a business name or corporation.