GST Invoice Template - Canada

A GST invoice is a legal document required by the Canada Revenue Agency (CRA) when a GST-registered business charges GST to a customer. Unlike regular invoices, a GST invoice must include the vendor's GST registration number, the GST amount charged, and be issued before payment is received. Regular invoices don't require this level of detail. For GST-registered businesses, issuing proper GST invoices is essential for claiming input tax credits on business expenses and maintaining CRA compliance. The template ensures all mandatory fields are included automatically.

Only GST-registered businesses must issue GST invoices. In Canada, businesses with revenues exceeding $30,000 in a four-calendar-quarter period must register for GST/HST. Once registered, you're required to charge GST (or HST in participating provinces) to most customers and issue GST invoices. Small businesses below the threshold can choose to register voluntarily. Self-employed workers, freelancers, and contractors operating above the threshold must register and issue GST invoices to remain compliant with CRA regulations.

A valid GST invoice requires specific information: your business name and GST registration number, invoice date and number, customer name and address, itemized description of goods or services, quantity and price of each item, GST amount charged separately, and total amount due. The invoice must be issued before or when payment is requested, not after. The template includes all these mandatory fields to ensure compliance. Missing any required element can result in the invoice not being recognized by the CRA.

GST is calculated as a percentage of the subtotal. The federal GST rate is 5%, but in HST provinces (ON, NS, NB, NL, PE), the combined rate is 13% or 15%. Some provinces also have additional PST. To calculate: multiply your subtotal by the applicable rate (5% for GST, 13-15% for HST, or combined rates where PST applies). The template automates this calculation for you. Round to the nearest cent. Always display the GST amount separately on the invoice so customers and the CRA can clearly see the tax charged.

No. Only GST-registered businesses can legally issue GST invoices in Canada. If you're not registered, you must issue a regular invoice without charging GST, even if you're required to be registered. Operating without proper GST registration while charging GST can result in significant CRA penalties, back taxes, and interest charges. If you're approaching the $30,000 registration threshold, register proactively to avoid compliance issues. The CRA takes GST compliance seriously, so using the correct invoice type for your registration status is critical.

GST (Goods and Services Tax) is the 5% federal tax applied nationwide. HST (Harmonized Sales Tax) combines federal and provincial tax at 13% or 15% in Ontario, Nova Scotia, New Brunswick, Newfoundland, and PEI. PST (Provincial Sales Tax) is a separate provincial tax in British Columbia, Saskatchewan, and Manitoba, applied in addition to the 5% GST. Quebec charges QST instead. The tax rate you charge depends on your business location and your customer's location. The template allows you to configure the correct rate for your province and adjust for interprovincial sales.

You must retain GST invoices and supporting documentation for six years from the end of the fiscal year in which the transaction occurred, as required by CRA regulations. This applies to both invoices you issue and invoices you receive. Digital copies are acceptable if they're legible and complete. Poor record-keeping is one of the most common audit triggers. Using a template system ensures consistent formatting and makes records easier to organize and retrieve during a CRA audit or review.

Common errors include omitting your GST registration number, failing to show GST separately, using an incorrect tax rate for the province, issuing invoices after payment is received, and including customers' GST numbers on invoices (which isn't required). Rounding GST incorrectly or mixing GST rates on multi-province sales also causes problems. Some businesses charge GST to exempt customers or forget to update invoices for HST provinces. The template eliminates most of these errors by enforcing proper field requirements and calculations automatically.