GST/HST Business Calculator

You must register when your total taxable revenues exceed $30,000 over four consecutive calendar quarters or in a single quarter. Below this threshold, you are a "small supplier" and registration is optional.

The Quick Method is a simplified way to calculate GST/HST. Instead of tracking ITCs on every expense, you apply a flat remittance rate to your revenue (including GST/HST collected). It is available to businesses with under $400,000 in taxable sales.

ITCs let you recover the GST/HST paid on business expenses. You subtract ITCs from the GST/HST you collected to determine your net tax. You need proper documentation (invoices) to claim ITCs.