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GST/HST on an invoice: what contractors must show
GST/HST on an invoice depends on the total. Under $100 you need your name, the date and the total. From $100 add your registration number and the tax. From $500 add the customer's name, a description and the payment terms.
What the CRA requires
| Total | What it must show |
|---|---|
| Under $100 | Your business name, the invoice date, the total. |
| $100 to $499.99 | All of the above, plus your GST/HST registration number, and the GST/HST amount (or a statement that the price includes tax at the rate). |
| $500 or more | All of the above, plus the customer's name, a short description of the work, and the payment terms. |
These thresholds come from the CRA's rules and have applied since April 2021.
In Quebec
Revenu Québec uses the same thresholds for the GST and QST, and from $100 both your GST and QST numbers go on the invoice. See Preparing Invoices.
Your registration number
Your GST/HST number is 15 characters: your 9-digit business number, then RT, then a 4-digit account number. Customers can check it on the CRA's registry.
In Knockround today
Knockround puts your business details, the customer, the number, the lines and the total on every invoice, and you can add your tax number. It doesn't yet split GST/HST and QST into named lines, so if you need that, check an invoice against this page before relying on it.
This is general information. Your accountant or the CRA can tell you what applies to you.
Questions
When do I have to register for GST/HST?
Generally once your taxable revenues pass $30,000 over four consecutive quarters. The CRA has the details.
Do I have to show the GST/HST number on every invoice?
From $100 up, yes. Under $100 it isn't required, though many businesses show it anyway.
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