GST/HST for Small Businesses: What You Need to Know
Updated: 19 hours ago
Canadian Business Taxes
October 12, 2026 - 4 mins read
Clear records make GST/HST simpler.
GST/HST is one of those responsibilities that can become complicated quickly when you’re running a small business. You might be unsure when you need to register, whether you should be charging GST or HST, or how much of the tax you’ve paid on business expenses you can claim. And if your bookkeeping isn’t properly maintained, preparing a GST/HST return can become more complicated than it needs to be. Here’s what Canadian small business owners should understand about their GST/HST obligations.
1. When Does a Small Business Need to Register for GST/HST?
For most businesses, GST/HST registration becomes mandatory when revenue from taxable supplies exceeds the $30,000 small supplier threshold. This is based on revenue from taxable supplies, not your business’s net profit.
The threshold is generally assessed over a single calendar quarter or four consecutive calendar quarters. Revenue from associated persons may also need to be considered. When you exceed $30,000 in a single calendar quarter, you generally must register and begin charging GST/HST on the supply that caused you to exceed the threshold. If you exceed the threshold over multiple quarters without exceeding it in one quarter, different timing rules apply. Some businesses may also choose to register voluntarily before reaching the threshold, provided they meet the applicable conditions. Because registration dates affect when tax must be charged, it’s important to determine when your business becomes required to register rather than assuming you can wait until year-end.
2. What’s the Difference Between GST and HST?
The tax you charge depends on the nature of the supply and the applicable place-of-supply rules. For many taxable goods and services:
Alberta: The GST rate is 5%.
Ontario: The HST rate is 13%.
A business located in Alberta may still need to charge Ontario HST on certain supplies made to Ontario customers. Similarly, an Ontario business may charge a different rate depending on where the supply is considered to take place. You shouldn’t assume the correct tax rate is always determined by your business’s physical location.
There are also supplies that are zero-rated or exempt from GST/HST, so the nature of your business activity matters.
3. Can You Claim GST/HST Paid on Business Expenses?
Registered businesses engaged in commercial activities may be eligible to recover GST/HST paid on qualifying purchases and expenses through input tax credits (ITCs). However, not every business purchase automatically qualifies.
Eligibility depends on several factors, including the business use of the purchase, the nature of the expense, and whether the necessary supporting documentation is available. For example, certain meals and entertainment expenses are subject to restrictions, while some purchases used partly for personal purposes may require an adjustment. Keeping a receipt is important, but the receipt must contain the required information and the expense must meet the applicable ITC rules. The CRA requires registrants to maintain records that support their GST/HST claims.
4. How Often Do You Need to File GST/HST?
Your filing frequency depends on the reporting period assigned by the CRA or a valid reporting-period election. Businesses may file:
Monthly
Quarterly
Annually
Monthly and quarterly GST/HST returns are generally due one month after the end of the reporting period. For example, a business with a regular July 1 to September 30 quarterly reporting period would ordinarily have an October 31 filing and payment deadline, subject to the CRA’s weekend and holiday rules.
Annual filing deadlines depend on the business and reporting period. Some annual filers have special filing and payment deadlines. Your GST/HST reporting period may not match your income tax reporting period, so it’s important to verify the dates assigned to your business.
5. Why Accurate Bookkeeping Matters for GST/HST
GST/HST reporting relies on accurate records of your taxable sales, tax collected, and eligible input tax credits. When financial transactions aren’t properly recorded, several problems can arise. For example, sales may be recorded without the appropriate GST/HST, purchases may be incorrectly categorized, or tax credits may be claimed without adequate supporting documents. Unreconciled accounts and missing transactions can also affect the completeness of your records.
Before a GST/HST return is prepared, the relevant bookkeeping should be reviewed to ensure the underlying information is complete and properly supported. Having your transactions recorded in accounting software is only part of the process. The accuracy of those records matters just as much.
6. What Happens If You Miss a GST/HST Filing Deadline?
Missing a GST/HST deadline can create additional obligations. Depending on the circumstances, the CRA may charge interest on outstanding amounts and penalties for late returns. Even when a business cannot pay the full amount owing, it should not simply ignore its filing obligations. If your GST/HST returns are overdue, the first step is determining which reporting periods are outstanding and whether the bookkeeping for those periods is complete. Once the records have been reviewed and corrected where necessary, the outstanding returns can be prepared using the appropriate financial information.
Need Help With Your GST/HST Bookkeeping?
Managing GST/HST becomes easier when your bookkeeping is accurately maintained throughout the year. At Pivotal, we help small businesses across Alberta and Ontario maintain organized financial records, track GST/HST, and prepare their bookkeeping for applicable tax filing requirements. Whether you need ongoing bookkeeping support or have several outstanding periods to catch up on, our team can help you get your records in order.
Book a Discovery Call to discuss your bookkeeping and tax preparation needs.
Sources
Nathlyne Gboway | Founder
Bookkeeping and tax for individuals and businesses, handled with care.
Based in Edmonton, Alberta, serving small businesses across Alberta and Ontario. Want more bookkeeping and tax insights in your inbox?
Comments