GST/HST registration: when and why
Should you register before you cross the $30K threshold? The answer is usually yes, and here is why.
Published February 26, 2025 · 5 min read
GST/HST registration is mandatory once your business earns more than $30,000 in worldwide taxable sales over four consecutive quarters. Most businesses delay registration until they are forced to. That is usually a mistake.
Why register early
The instant you register for GST/HST, you can claim Input Tax Credits (ITCs) on every business expense you incur. That means recovering the GST/HST you paid on your laptop, your software subscriptions, your office rent, your professional services.
If you are pre-revenue or low-revenue but spending heavily to build, early registration can put thousands of dollars back in your pocket.
When NOT to register early
If your customers are individuals (not businesses) and registering would force you to add 5-15% to your prices, you may price yourself out of the market until you cross the threshold and have to.
If your costs are minimal (e.g., a pure service business with low overhead), the ITC benefit may not outweigh the administrative cost.
How registration works
Register online through CRA's My Business Account or by phone. Takes about 15 minutes. You get a Business Number with a GST/HST account suffix.
Choose your filing frequency: annual (if revenue under $1.5M), quarterly, or monthly. Most small businesses pick quarterly.
Charge GST/HST on every taxable sale starting from your effective registration date.
Common mistakes
Forgetting to charge GST/HST on invoices after registration. The CRA still collects from you whether you charged the customer or not.
Not claiming ITCs because you did not keep receipts. Every receipt with GST/HST is potentially money back to your business.
Missing filing deadlines. Penalties are immediate and compound.
GST/HST registration is more often a tool than a burden. If your business has meaningful expenses and you are not selling exclusively to individuals on price-sensitive terms, register early and start claiming ITCs.