Running a business
Invoice total calculator
Rate, hours, expenses and HST — the number to put at the bottom.
A starting point, not tax advice. Nothing you type leaves your browser.
How this works
What the number means
The subtotal is rate times quantity plus recoverable expenses. If you are registered, 13% HST applies to the whole subtotal, including most expenses you are passing on.
If you are not registered you must not charge HST. Charging it before you are registered, or continuing to charge after your number is closed, both create problems that take longer to fix than they took to cause.
Worked example. 12 hours at $85 plus $150 of materials is $1,170. With HST the invoice totals $1,322.10, of which $152.10 is tax you are holding for the CRA.
Sources
- CRA — Charge and collect the GST/HST: which rate to charge — modified 8 April 2026
- CRA — When to register for and start charging the GST/HST — modified 16 June 2026
Rates change. The CRA page is the authority, and these are reviewed every January.
Questions
When do I have to register for GST/HST?
Once your taxable revenue passes $30,000 over four consecutive calendar quarters. If you pass $30,000 within a single quarter, you must register within 29 days of the sale that took you over. The CRA sets both rules.
Next step
Want someone to check the real figure?
A calculator estimates. A consultation answers for your actual situation. The first one is free.