When Must A U.S. Retailer Register For GST/HST? Cross-Border Checklist

GST/HST Canada's federal Goods and Services Tax and harmonized provincial-federal sales tax system.

U.S. retailers who sell into Canada must determine whether they have an obligation to register for GST/HST, collect tax, or account for tax at importation. Obligations depend on whether you sell goods or services, whether goods are imported into Canada, sales volumes, and whether you meet the federal small-supplier threshold. Non-resident registration rules have expanded in recent years to capture digital supplies and marketplace sales, so cross-border sellers should evaluate their Canadian tax exposure before scaling Canadian sales.

When Registration Is Required

Registration is generally required when a business makes taxable supplies in Canada and is not a small supplier. Key triggers for a U.S. retailer include:

• Importing Goods: When goods are imported into Canada for sale, GST/HST is typically collected at the border by the Canada Border Services Agency (CBSA). Importers must ensure declarations are correct and that duties and GST/HST are paid or deferred under an accounting program.
• Having Significant Sales To Canadian Consumers: Non-resident vendors that make taxable sales of digital services or goods to Canadian consumers may need to register and collect GST/HST under modern non-resident vendor rules.
• Marketplace Facilitators: Online marketplaces sometimes have collection responsibilities; sellers should confirm whether the marketplace collects GST/HST on their behalf.

Small-Supplier Threshold And Voluntary Registration

The federal small-supplier threshold (for most suppliers) is CAD 30,000 in taxable revenues over the last four consecutive calendar quarters. Below this level a non-resident may not be required to register, but voluntary registration is possible and may be beneficial if the business wants to claim input tax credits on Canadian business expenses or operate with a Canadian tax account.

Collecting, Remitting, And Filing

Once registered, a non-resident must charge the appropriate GST/HST rate on taxable supplies to Canadian customers, file periodic returns with the Canada Revenue Agency, and remit net tax. The frequency of filing depends on historical tax liability and CRA rules. Accurate invoicing that separates tax and taxable amounts is essential for customers and for claiming input tax credits.

Imported Goods Versus Remote Sales

Importation and remote sales are treated differently in practice:

• Imported Goods: GST/HST and any duties are collected at importation. A Canadian-based customs broker can clear goods and remit duties and taxes; importers with appropriate accounts may defer payment.
• Remote Sales (Digital Goods/Services): Non-resident suppliers may be required to register and collect GST/HST on taxable digital supplies to Canadian consumers, particularly after tax changes targeting online vendors.

Practical Example — A U.S. E‑commerce Seller

A U.S. e-commerce retailer ships goods from the U.S. to individual customers in Ontario. If the retailer qualifies as a non-resident vendor required to register, it must charge 13% HST at checkout for sales to Ontario customers and remit that tax to the CRA. If the retailer instead imports bulk inventory into Canada and ships domestically from a Canadian fulfillment center, GST/HST will generally be dealt with at import and the Canadian warehouse operator or importer of record will handle customs and tax treatment.

Checklist For U.S. Retailers Selling Into Canada

• Review Sales Volumes: Compare taxable revenue against the CAD 30,000 small-supplier threshold.
• Determine Supply Type: Distinguish between imported goods, digital services, and in-Canada services — rules differ.
• Check Marketplace Policies: Verify whether marketplaces collect GST/HST or require seller registration.
• Set Up Compliance: Register for a GST/HST account if required, implement tax calculation in checkout, and appoint a customs broker for imports.
• Keep Records: Maintain Canadian invoices, shipping documentation, and customs paperwork for audits and input tax credit claims.

In short, the GST/HST Canada's federal Goods and Services Tax and harmonized provincial-federal sales tax system can create registration, collection, and remittance obligations for U.S. retailers selling into Canada. Determine whether your sales model crosses the registration thresholds, whether importation or remote-supplier rules apply, and whether marketplaces or customs brokers will manage parts of compliance for you.