Free tool · GST/HST
Do I need to register for HST?
Six questions on the CRA’s small-supplier rules — the $30,000 threshold by single quarter and by last four quarters, associated businesses, the taxi and ride-share exception and voluntary registration — show whether registration is likely required.
The questions
Answer for taxable sales before expenses, worldwide, by calendar quarter.
Your result appears here
Answer all 6 questions to see whether HST registration is likely required.
General information only. This checker follows the CRA’s page on when to register for the GST/HST and runs entirely in your browser — nothing you choose is sent or stored. It is not tax advice and not a determination of your registration status; the rules for non-residents, digital platforms and public service bodies differ. Rules checked on September 25, 2026.
About three minutes
Registering, or already over the line?
Tell us what you sell and roughly what you bill by quarter. A partner will confirm whether registration applies and set up the filing rhythm with your bookkeeping.
Start: bookkeepingPrefer to talk? (905) 234-6925
The background
How the small-supplier rules work.
The CRA’s rule is short, but the details — which quarter, what counts, who is associated — decide whether you owe HST you never collected.
The $30,000 test, two ways
You stop being a small supplier if taxable sales go over $30,000 in one calendar quarter, or over $30,000 across the last four consecutive calendar quarters. Both tests count revenue before expenses, worldwide, including zero-rated sales.
The day it takes effect
Over in a single quarter: you are registered from the sale that took you over, and must charge HST on that sale. Over across four quarters: you stay a small supplier to the end of the following month, then are registered from your next taxable sale. Either way, register within 29 days.
What doesn’t count
Exempt supplies — most residential rent, many health and child-care services, most financial services — plus goodwill and sales of capital property are left out. If everything you sell is exempt, you don’t register.
Associates count together
The threshold applies to you and your associated businesses combined, so a second corporation doesn’t reset the count.
Taxi and ride-share
Self-employed taxi and commercial ride-sharing drivers must register from the day they start, whatever their sales.
Registering early
Under the threshold you can register voluntarily if you make taxable supplies, and claim input tax credits on business purchases. You then charge HST, file returns and stay registered for at least a year.
Questions
Is this a CRA determination?
No. It shows what the CRA’s published rules suggest for your answers. Your effective date and obligations depend on your actual sales by calendar quarter.
What happens if I went over the threshold months ago?
You were required to register from the sale that took you over, and the CRA can assess HST on sales since then even if you never charged it. Registering promptly and sorting out the back period is far cheaper than waiting.
Is it a calendar quarter or any three months?
Calendar quarters: January to March, April to June, July to September and October to December.
I only sell to customers outside Canada. Do I still register?
Exports are usually zero-rated, which counts toward the $30,000 threshold. You would charge 0% but register, file, and claim input tax credits on your costs.
Is anything I answer sent to Versa?
No. The result is worked out in your browser and nothing is stored. If you’d like to talk it through, start a conversation about bookkeeping.