GST/HST Explained: A Bookkeeping Guide for Canadian Businesses
What GST/HST is, when you need to register, how to track it in your books, and how to stay CRA-compliant — a plain-English guide for Canadian businesses.
If you run a business in Canada, GST/HST is unavoidable — and getting it wrong is an easy way to attract a Canada Revenue Agency (CRA) review. Here's a plain-English guide to keeping it clean in your books.
What is GST/HST?
GST (Goods and Services Tax) is a federal tax on most goods and services. In several provinces it's combined with provincial sales tax into a single HST (Harmonized Sales Tax). The rate you charge depends on the province where your customer is located, not where you are.
When do you need to register?
Generally, you must register for GST/HST once your business passes the $30,000 revenue threshold over four consecutive calendar quarters (the "small supplier" limit). Many businesses register voluntarily before that to claim input tax credits.
This is general information, not tax advice — confirm your situation with a CRA-registered professional. Our tax & compliance support is reviewed by a practising Canadian CPA.
Input tax credits (ITCs)
The upside of registering: you can claim back the GST/HST you pay on business purchases as input tax credits. Accurate bookkeeping is what makes this work — every eligible expense needs to be recorded and coded correctly, with the tax tracked separately.
How to track GST/HST in your books
- Set the right tax codes in QuickBooks, Xero, or Sage for each province you sell into.
- Separate the tax on every sale and purchase so it lands in the right GST/HST accounts.
- Reconcile regularly so the tax payable and ITC balances always tie out.
- File on time — monthly, quarterly, or annually, depending on your assigned period.
Clean, current books make filing a non-event. Messy books make it a scramble — which is exactly where a reliable month-end close pays off.
Common GST/HST mistakes
- Charging the wrong provincial rate.
- Missing input tax credits because expenses weren't coded properly.
- Forgetting to register after crossing the threshold.
- Filing late and incurring penalties and interest.
How Aimfox helps
We prepare your GST/HST data, keep your books CRA-ready, and our practising Canadian CPA reviews and files your returns. You get accurate tracking, maximised input tax credits, and zero last-minute stress.
See our tax & compliance support and outsourced accounting services, or book a free consultation.
This article is general information for Canadian businesses and not a substitute for professional tax advice.
