GST/HST Registration Letter (Canada)

A GST/HST Registration Letter in Canada records the details needed to register a business for GST/HST with the Canada Revenue Agency, governed primarily by the Excise Tax Act (R.S.C. 1985, c. E-15).

GST/HST registration is governed by Part IX of the Excise Tax Act (R.S.C., 1985, c. E-15). Section 240 of the Act requires every person who makes taxable supplies in Canada and who is not a small supplier to register for GST/HST. The small supplier threshold is $30,000 in total taxable revenues in a single calendar quarter or in four consecutive calendar quarters; for charities and public service bodies, the threshold is $50,000. Once the threshold is exceeded, the business has 29 days to register and must begin collecting GST/HST as of the day the threshold is crossed.

The CRA assigns a Business Number (BN) — a unique 9-digit identifier under the Business Number program established by the Canada Revenue Agency Act (S.C. 1999, c. 17) — when a business first registers. The GST/HST program account is identified by the BN plus the RT suffix and account number (e.g., 123456789 RT0001). Businesses that already have a BN from a previous registration (such as a payroll account or import/export account) obtain a new RT program account under their existing BN rather than receiving a new BN.

Voluntary registration — available to small suppliers below the $30,000 threshold under subsection 240(3) of the Excise Tax Act — allows a business to register and collect GST/HST before reaching the mandatory threshold. Voluntary registration is advantageous when a business makes significant purchases subject to GST/HST, because registration allows the business to claim Input Tax Credits (ITCs) on those purchases and recover the tax paid. Without registration, a small supplier cannot claim ITCs. A registration support letter for a voluntary registrant should explain the business's reasons for electing voluntary registration and the anticipated commencement of commercial activity.

Non-resident businesses that make taxable supplies in Canada — including foreign e-commerce platforms, software-as-a-service providers, and digital content suppliers with Canadian customers — may be required to register under the normal registration rules or under the simplified registration regime introduced effective 1 July 2021 under the Digital Services Tax measures in the Budget Implementation Act, 2021, No. 1 (S.C. 2021, c. 23). Non-resident suppliers subject to the simplified regime collect and remit GST/HST at 5% (or HST at the applicable provincial rate) on supplies to Canadian consumers, without the right to claim ITCs under Section 169 of the Excise Tax Act. Section 240 of the Excise Tax Act requires mandatory registration when taxable supplies exceed CAD $30,000; Section 280 establishes penalties for late registration; Section 245 governs reporting period assignment. The Canada Revenue Agency Act (S.C. 1999, c. 17) establishes the CRA's authority to administer GST/HST registration. Section 9 of the Act Respecting the Quebec Sales Tax (CQLR, c. T-0.1) requires separate QST registration with Revenu Québec for supplies made in Quebec. The Tax Court of Canada Act (R.S.C. 1985, c. T-2) grants the Tax Court of Canada jurisdiction over GST/HST assessments, with appeals to the Federal Court of Appeal. Forms-legal.com provides this GST/HST Registration Letter (Canada) template for documenting CRA registration requests under the Excise Tax Act.

A Canadian GST/HST Registration Letter is needed when a business needs to formally document its registration request, verify its registration status with the CRA, or communicate specific business facts that affect the registration process.

New businesses that complete their GST/HST registration online through the CRA's Business Registration Online (BRO) portal at canada.ca may receive a confirmation page but not a formal written confirmation letter. A registration support letter drafted at the time of registration creates a contemporaneous written record of the effective date, the type of supplies the business makes, and any special circumstances — important documentation if the CRA later questions when the business should have begun collecting GST/HST.

Businesses that exceed the $30,000 small supplier threshold mid-year and are uncertain whether their registration is effective need a registration letter to document the date they first exceeded the threshold, which determines the effective date of mandatory registration and the date from which the business should have been collecting GST/HST. A business that collected HST before receiving its registration number must still remit the collected tax; the registration letter documents the circumstances.

Small businesses applying for voluntary registration to claim ITCs on startup purchases — particularly capital expenditures such as equipment, computers, and leasehold improvements that involve significant GST/HST — need a registration letter that specifies the intended commencement of commercial activities and the basis for the voluntary registration election under subsection 240(3) of the Excise Tax Act.

Businesses registering for HST in a participating province — Ontario (13%), New Brunswick (15%), Nova Scotia (15%), PEI (15%), Newfoundland and Labrador (15%) — need to confirm in their registration letter which provincial HST rate applies to their supplies made in that province. For businesses operating across multiple provinces, the registration letter should clarify the provinces of supply and the applicable rates.

Non-profit organizations and charities registering voluntarily — or mandatorily, where taxable revenues from commercial activities exceed the $50,000 public service body threshold under subsection 240(3.1) of the Excise Tax Act — need a registration letter that confirms their non-profit or registered charity status and estimated annual taxable revenues from commercial activities (as distinct from exempt supplies such as memberships and donations).

Section 240 of the Excise Tax Act (R.S.C., 1985, c. E-15) establishes mandatory registration obligations; Section 169 governs ITC claims; Section 245 governs reporting period assignment; Section 280 establishes penalties for late registration and remittance; Section 301 governs the formal objection process for CRA assessments; Section 306 governs appeals to the Tax Court of Canada under the Tax Court of Canada Act (R.S.C. 1985, c. T-2). Schedule IX of the Excise Tax Act contains the place of supply rules determining which provincial HST rate applies. The Canada Revenue Agency Act (S.C. 1999, c. 17) establishes the CRA's authority to administer GST/HST. Section 9 of Quebec's Act Respecting the Quebec Sales Tax (CQLR, c. T-0.1) requires separate Revenu Québec registration for supplies in Quebec. The Input Tax Credit Information Regulations (SOR/91-45) specify documentary requirements for ITC claims. Forms-legal.com provides this GST/HST Registration Letter (Canada) template for documenting CRA registration requests.

A complete Canadian GST/HST Registration Letter contains specific information that supports the CRA's registration process and creates a documented record of the registration request.

The business identification section states the full legal name of the business (as it will appear on the GST/HST account), the operating or trade name (if different), the business structure (sole proprietorship, partnership, corporation — and if a corporation, the jurisdiction of incorporation and Business Corporation Number), and the business's principal mailing address for CRA correspondence. For corporations, the legal name should match the name in the articles of incorporation exactly to avoid mismatch errors in the CRA's registration system.

The Business Number section states the existing BN if the business already has one from a prior CRA program account registration, or confirms that a new BN is required if this is the business's first CRA registration. Including the existing BN eliminates duplicate BN assignments and confirms the new RT program account is linked to the correct business entity.

The nature of business and taxable supplies section describes the principal business activity, the types of taxable supplies made (goods, services, or both), the estimated annual taxable revenues, and whether the business makes any zero-rated supplies (exports, certain agricultural products, prescription drugs) or exempt supplies (residential rent, medical services, most financial services) that are not subject to GST/HST collection. This section determines the reporting period the CRA will assign — monthly ($6M+), quarterly ($1.5M–$6M), or annual (under $1.5M) — under section 245 of the Excise Tax Act.

The effective date section specifies the requested effective date of registration. For mandatory registrants, the effective date is the day the business exceeded the small supplier threshold or, if later, the 29th day after that date. For voluntary registrants, the effective date can be the first day of any calendar month. The CRA may adjust the effective date based on the evidence provided, so the registration letter should include supporting documentation such as the first invoice or contract showing taxable supply activity commencing on or after the requested effective date.

The registration type section specifies whether the applicant is registering under the regular GST/HST registration rules, the simplified registration regime for non-resident digital services suppliers, or a special registration category such as a non-resident registrant supplying real property in Canada. Simplified regime registrants collect GST/HST at 5% (or the applicable HST rate) on supplies to Canadian consumers but cannot claim ITCs, which must be clearly noted in the registration letter to confirm the registrant understands the ITC restriction.

The authorized representative section — included where an accountant or tax professional is submitting the registration on the business owner's behalf — confirms the representative's identity, their CRA RepID (from the Represent a Client system), and the business owner's authorization for the representative to submit the registration and receive confirmation on the business's behalf. Including an RC59 Business Consent authorization reference confirms the representative can follow up with the CRA on the registration status without requiring the business owner's direct involvement. Section 150 of the Excise Tax Act governs the election to treat certain related-party supplies as exempt for GST/HST purposes, which may be relevant for holding company structures. Section 178.8 of the Excise Tax Act governs imported taxable supplies, relevant for businesses receiving services from non-resident suppliers. Section 280 of the Excise Tax Act establishes penalties for late registration (failure to register when required) and late remittance of collected GST/HST — interest accrues at the prescribed rate under the Excise Tax Act Regulations. Section 169 of the Excise Tax Act governs ITC entitlements; the Input Tax Credit Information Regulations (SOR/91-45) specify the documentation requirements for ITC claims by amount. Section 245 of the Excise Tax Act governs reporting period assignments — monthly (over $6M), quarterly ($1.5M–$6M), or annual (under $1.5M). Section 9 of Quebec's Act Respecting the Quebec Sales Tax (CQLR, c. T-0.1) requires separate QST registration with Revenu Québec for supplies made in Quebec. The Tax Court of Canada Act (R.S.C. 1985, c. T-2) grants the Tax Court of Canada jurisdiction to hear objections to CRA GST/HST assessments, with appeals to the Federal Court of Appeal under the Federal Courts Act (R.S.C. 1985, c. F-7). Section 301 of the Excise Tax Act governs the formal objection process for challenging CRA assessments. Forms-legal.com provides this GST/HST Registration Letter (Canada) template as a starting point for documenting CRA registration requests under the Excise Tax Act (R.S.C., 1985, c. E-15).