How do I file a GST/HST return in Canada?
GST/HST returns are filed annually (most small businesses), quarterly, or monthly based on revenue thresholds set by the CRA. The return reports HST collected minus input tax credits (ITCs) claimed on business expenses, with the net amount either remitted to or refunded from the CRA. Annual returns are due 3 months after the fiscal year-end.
Detailed Explanation
Once registered for GST/HST, you must file returns at a frequency determined by the CRA based on your annual taxable revenues. Understanding your filing frequency, how to calculate your net tax, and what credits you can claim is essential to avoid penalties and overpayments.
GST/HST filing frequency
The CRA assigns filing frequency based on your total annual taxable revenues: - Annual filing (revenues under $1.5 million): return and payment due 3 months after your fiscal year-end. For a December 31 year-end, due March 31. - Quarterly filing (revenues $1.5 million to $6 million): return and payment due within 1 month after each quarter's end - Monthly filing (revenues over $6 million): return and payment due within 1 month after each month's end
You can voluntarily opt for more frequent filing if your business regularly has GST/HST refunds to claim — quarterly or monthly filing puts refunds in your hands faster than waiting for the annual deadline.
The Quick Method of accounting
Small businesses with annual revenues under $400,000 (excluding GST/HST) can use the Quick Method, which simplifies GST/HST accounting significantly. Instead of tracking ITCs on every expense, you: 1. Collect GST/HST from customers at the normal rate (5%/13%/15%) 2. Remit a reduced rate (the Quick Method remittance rate) applied to GST/HST-inclusive revenues 3. Keep the difference as a built-in offset for ITCs
For Ontario service businesses using Quick Method (2026), the remittance rate is approximately 8.8% of HST-inclusive revenues. You also get a 1% credit on the first $30,000 of GST/HST-inclusive revenues per year.
Example: An Ontario service business using Quick Method with $100,000 in revenues (plus 13% HST = $113,000 total billings). Quick Method remittance: approximately 8.8% of $113,000 = $9,944. Actual HST collected: $13,000. You keep $3,056 — this represents your deemed ITC for business expenses. You do not track individual expense ITCs under this method.
The Quick Method is elected by filing Form GST74 with the CRA.
Standard method: calculating net tax
Under the standard method: 1. Add up all GST/HST charged to customers during the reporting period (Tax on Sales) 2. Add up all ITCs you are eligible to claim on business expenses 3. Net Tax = Tax on Sales - ITCs 4. If positive: remit the net tax to CRA 5. If negative: you have a refund
What qualifies as an ITC?
You can claim an ITC for the GST/HST paid on any expense that is: - Used at least partly in your commercial (taxable or zero-rated) activities - Supported by valid documentation - Claimed within 4 years of the due date for the return in which the ITC would first have been available
Documentation requirements for ITCs
The amount of documentation required scales with the purchase amount: - Under $30: no documentation required - $30 to $149.99: supplier name, invoice date, total amount, and GST/HST paid or the rate used - $150 and over: all of the above PLUS your business name and GST/HST registration number, description of goods/services, and per-item pricing
The supplier's GST/HST registration number is critical — you cannot claim an ITC on purchases from unregistered suppliers.
Filing a GST/HST return
Most businesses file electronically through CRA My Business Account (NETFILE for GST/HST) or through a representative using the Represent a Client portal. You can also mail a paper GST34 return, though electronic filing is faster and recommended.
Installments for annual filers
Annual GST/HST filers with net tax over $3,000 must make quarterly installments throughout the year. The annual return then reconciles the total owing against installments already paid.
Source: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses/complete-file-return-business.html
Real-World Examples
Annual filer under Quick Method (Ontario service business)
A freelance web designer in Ontario has $90,000 in revenues (plus 13% HST = $101,700 total). Using the Quick Method at an 8.8% remittance rate: 8.8% x $101,700 = $8,950 remitted to CRA. She collected $11,700 in HST. She keeps $2,750 — the deemed ITC to cover her business expenses. Annual filing due March 31 for her December 31 year-end.
Quarterly filer with refund position
A product startup buys $200,000 in goods and pays $10,000 in HST on inventory purchases in Q2, but only sold $50,000 worth and collected $6,500 in HST. Net tax = $6,500 - $10,000 = -$3,500 (refund). The company opts for quarterly filing (permitted voluntarily) to receive refunds within 6-8 weeks rather than waiting for the annual return.
Standard method with mixed taxable and exempt revenues
A small landlord owns two commercial units (taxable, 13% HST) and two residential units (exempt, no HST). Annual commercial rent: $60,000 (collected $7,800 HST). Commercial expenses: $15,000 (paid $1,950 HST as ITCs). Residential expenses: $20,000 (paid $2,600 HST but CANNOT claim ITC — related to exempt supply). Net tax payable: $7,800 - $1,950 = $5,850. The $2,600 on residential expenses is an unrecoverable cost.
Common Mistakes to Avoid
- Missing the 3-month annual GST/HST return deadline (March 31 for December 31 year-end) — the CRA assesses penalties and interest from day one after the due date.
- Claiming ITCs on expenses that are used to make exempt supplies — there is no ITC recovery on the GST/HST paid on expenses related to exempt revenues like residential rent.
- Not keeping documentation adequate for the purchase amount — an ITC for a $200 purchase requires the supplier's GST/HST registration number; without it the ITC is disallowable on audit.
- Forgetting to elect the Quick Method before the first return — it must be elected in advance and cannot be applied retroactively.
Frequently Asked Questions
What happens if I file my GST/HST return late?
Late filing penalties are 1% of the net tax owing plus 0.25% per month (up to 12 months). If you have a refund, there is generally no late-filing penalty but refunds are not paid until the return is filed. Interest is charged on unpaid amounts at the CRA's prescribed rate (approximately 8-10%) compounded daily from the due date. File even if you cannot pay — the penalty for not filing is on top of interest on the unpaid amount.
Can I change my GST/HST filing frequency?
You can request a change in filing frequency by contacting the CRA or through My Business Account. The CRA may automatically reassign your frequency if your revenues change substantially. Voluntarily moving to quarterly or monthly filing (even if your revenues qualify for annual) is allowed and makes sense if you regularly have large refund positions.
Are there any goods or services where I charge 0% GST/HST?
Yes — zero-rated supplies are taxable at 0%. You charge nothing to the customer but you CAN still claim ITCs on your related expenses. Zero-rated supplies include: exports of goods and services, basic groceries (unprepared food), prescription drugs and medical devices, international air travel, and certain agricultural products. This is different from exempt supplies where no HST is charged AND no ITCs are available.
If I do business in multiple provinces, which rate do I charge?
The rate depends on the place of supply (where the supply is made), which generally follows the recipient's location for services. If you provide consulting services to an Ontario client from your BC office, you generally charge 13% Ontario HST. The CRA's place of supply rules can be complex for digital services, property, and cross-border supplies. When in doubt, check CRA's place of supply guide or consult an accountant.
How do I handle GST/HST on purchases from outside Canada?
When you import goods into Canada, you pay GST at the border through the Canada Border Services Agency (CBSA). For services and digital products purchased from foreign suppliers, large foreign digital service providers serving Canadians are required to register for GST/HST under simplified registration rules. As a registered business, you may need to self-assess (reverse charge) GST/HST on certain imported services if the foreign supplier does not collect it.
Practical Tips
- Reconcile your GST/HST account monthly even if you file annually — it is much easier to find mismatches from one month of records than to reconstruct a full year's worth of transactions when your accountant asks in February.
- If you regularly receive large GST/HST refunds (common in export businesses or capital-intensive startups), apply to the CRA to file monthly — this dramatically improves cash flow compared to annual refunds.
- Consider the Quick Method carefully for service businesses under $400k — the math frequently favours it because service businesses have few input HST costs, making the standard method's ITC tracking unrewarding.
- Create a separate bank savings account specifically for GST/HST collected — treat it as a trust account, not operating cash, and transfer HST amounts there on every invoice payment received.
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