GST/HST Refund Calculator for Ecommerce Stores
Most ecommerce sellers either overpay or underpay their GST/HST without knowing it. This free GST/HST refund calculator shows what you collected, what you paid, and whether the government owes you money.
Estimate the GST, HST, PST & QST you've collected on sales across Canada — minus what you paid on purchases — to find your net amount due or refundable. Enter figures for any single reporting period (monthly, quarterly, or annual).
Enter your sales to customers in each province. Leave blank or enter $0 if you had no sales there.
Enter the total amount of business purchases (inventory, expenses, supplies, etc.) on which sales tax was charged to you.
⚠ Please select your home province and enter your total purchases before calculating.
| Province / Territory | Rate | Sales | Tax Collected |
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Need to know how to pay CRA? Here's a step-by-step video → How to Pay Your HST & Corporate Income Tax to CRA
This tool provides estimates only and is based on combined provincial sales tax rates. It does not account for specific exemptions, registration thresholds, or ITC eligibility rules. Consult a qualified accountant for advice specific to your situation.
WHY THIS MATTERS
You might be owed a refund and not know it
If you pay more GST/HST on business purchases than you collect on sales, the government owes you the difference. This is common for ecommerce sellers who buy inventory in Canada but sell mostly to the US. The free calculator above shows where you stand.
GST/HST rates vary by province and math is not simple
Sales tax in Canada ranges from 5% in Alberta to 15% in the Atlantic provinces, and Quebec has its own system. What you owe depends on where your customers are, not where you are. The free GST calculator above applies the right rate for every province.
Filing this wrong triggers CRA audit
Incorrect GST/HST filings are one of the most common audit triggers for ecommerce businesses. We see this regularly, sellers file based on guesswork and it creates problems. Getting the numbers right from the start is easier than correcting them later.
HOW THIS WORKS
Knowing what you owe is the start. Filing it correctly is what matters.
GST/HST for ecommerce is more difficult than most sellers expect, especially when you sell across provinces or into the US. We help Canadian Shopify and Amazon businesses make sure nothing is missed, claim what they are owed, and avoid CRA issues before they start.
Common questions about GST/HST for ecommerce stores
How does the GST/HST refund calculator work?
It calculates the total GST/HST you collected on sales in all provinces, removes the GST/HST you paid, and shows if you owe the government or are owed a refund. This free GST refund online calculator is built for Canadian ecommerce sellers on Shopify, Amazon, or both.
How is a GST/HST refund calculated for ecommerce?
The GST refund calculation formula is simple:
Total GST/HST collected on sales – total GST/HST paid on business purchases
If you paid more than you collected (common for sellers who export to the US) the difference is your refund. The free GST/HST calculator above runs this formula using your real numbers.
What are the GST/HST rates by province?
Rates range from 5% in Alberta and the territories up to 15% in New Brunswick, Newfoundland, and PEI. Ontario is 13%, Nova Scotia is 14%, and Quebec is 14.975%. BC, Manitoba, and Saskatchewan charge GST plus a separate provincial tax. The free HST refund calculator above applies the correct rate for every province, including Ontario’s 13%.
Can ecommerce sellers get a GST/HST refund?
Yes. If you pay more GST/HST on purchases than you collect on sales, you get the difference back. This is common for ecommerce sellers who sell to the US, where GST/HST does not apply, but buy inventory and supplies in Canada. Use the free tax refund calculator above to estimate yours.
What is the GST/HST credit and how is it estimated?
You can recover the GST/HST you paid on business purchases. This is called an input tax credit. PST in BC, Manitoba, and Saskatchewan is generally not recoverable. This GST/HST credit calculator estimates your credit based on your real sales and purchase numbers.
Do I charge GST/HST on US sales from my Canadian Shopify store?
No. GST/HST only applies to sales made in Canada. If your customer is in the US, you do not charge it. But you still pay GST/HST on your Canadian business expenses, which is why many ecommerce sellers who export end up with a refund.
What is the difference between GST, HST, PST, and QST?
The key difference for ecommerce sellers is that GST/HST paid on business purchases is recoverable, but PST is not. GST is the federal 5%. HST combines federal and provincial in participating provinces. PST is a separate provincial tax in BC, Manitoba, and Saskatchewan. QST is Quebec’s provincial tax
How do I pay my GST/HST balance to the CRA?
Payment goes through your CRA My Business Account. We have a step-by-step video showing exactly how to pay your HST and corporate income tax to CRA.
How often do I need to file GST/HST returns?
Monthly, quarterly, or annually, depending on your revenue. Most ecommerce sellers over $1.5 million in revenue file monthly. Your accountant can confirm which applies to you, or you can check your CRA account.
Should I use a free GST calculator or hire an accountant?
A free GST calculator gives you a quick check. For the actual filing, especially with cross-border sales or multi-province selling. An accountant who works with ecommerce businesses will catch things a calculator cannot.
Read our disclaimer here
DISCLAIMER: Online Calculator Tools
Please read this disclaimer carefully before using any of the online calculator tools provided by SAL Accounting Professional Corporation.—–
1.No Professional Relationship or Advice
The use of these online calculators does not create an accountant-client, contractual, or other professional relationship between you and SAL Accounting Professional Corporation. The information and estimations generated by these tools are for informational and illustrative purposes only and do not constitute personalized accounting, tax, financial, or legal advice. They are not a substitute for consulting with a qualified tax professional who is familiar with your specific financial situation.
2.Informational Purposes and Accuracy
No Guarantee of Accuracy: SAL Accounting Professional Corporation does not guarantee the accuracy, completeness, or reliability of any results provided by the calculators. Tax laws, rates, and regulations are complex and subject to frequent change. The tools are based on the tax laws applicable at the time they were designed and cannot account for all variables, future legislative changes, or specific rulings that may affect your actual tax liability or financial outcome.
3. User Data Input
You are solely responsible for the information and data you input into the calculators. SAL Accounting Professional Corporation is not responsible for any errors or consequences that arise from inaccurate, incomplete, or incorrectly entered data.
✔ By using these calculators, you acknowledge that you do so at your own risk and that SAL Accounting Professional Corporation does not take any responsibility for decisions taken as a result of any materials or information provided by it.