GST/HST Calculator
Updated
Quick answer: Add or back out GST/HST for any Canadian province in one tap. Handy for invoices, quotes and quick checks. Built by EverStone CPA.
The arithmetic is the easy part; which rate applies to a sale across a provincial line is not. Ask about a specific invoice.
Opens your own email app with the numbers filled in — add your question and a CPA replies, usually the same business day.
BC, Saskatchewan, Manitoba and Quebec also charge a separate provincial sales tax (PST/RST/QST). Pick the “GST only” line for the federal amount, or the combined line where the sale also attracts the provincial tax at its general rate — many services do not. Estimate for convenience, not tax advice.
How much GST or HST is in this amount — or how much do I add to it?
Anyone invoicing, checking a supplier bill, or backing tax out of a total that was quoted tax-included. It cannot tell you whether the supply is taxable in the first place, which is the question that actually goes wrong.
On this page
Estimated GST/HST: a worked example
These are the numbers already in the calculator above, so you can follow the arithmetic against the result it is showing.
| Step | Figure |
|---|---|
| Adding tax to $1,000 | $1,000 × 5% = $50.00 tax, $1,050.00 total |
| Extracting tax from $1,000 | $1,000 ÷ 1.05 = $952.38 before tax, $47.62 tax |
| Why they differ | The second treats the $1,000 as already including tax. Applying 5% to a tax-included total over-states the tax. |
What it assumes, and where it stops
Every estimate rests on assumptions. These are the ones that would change your number most.
| Assumption | What it means for your number |
|---|---|
| The supply is taxable at the selected rate | Zero-rated supplies carry 0% but still allow input tax credits; exempt supplies carry no tax and allow none. The difference matters more than the arithmetic. |
| The province is the place of supply | The rate follows place-of-supply rules, not where your business is. A BC firm can be required to charge 13% on an Ontario supply. |
| BC PST is not included | PST is a separate provincial tax with its own registration and return, and it is not an input tax credit. |
General information, not advice. Have a CPA confirm it for your situation
Understanding GST/HST in Canada
GST/HST is a tax on most goods and services in Canada. The rate you charge follows the place of supply, meaning where your customer is. That is 5% GST in Alberta and the territories, 13% HST in Ontario, 15% HST in the Atlantic provinces (14% in Nova Scotia since 2025), and 5% GST plus a separate provincial tax in BC, Saskatchewan and Manitoba.
Once your taxable sales pass $30,000 over four rolling quarters you must register, charge and remit GST/HST. The upside: you can then claim input tax credits for the GST/HST you paid on business expenses, which often means a smaller remittance, or a refund. Use the calculator above to add or remove tax for any province, then talk to us about registration and filing.
This calculator gives a general estimate for information only, not tax advice specific to your situation. Rates and rules change, and your result depends on details it can’t capture. We confirm the numbers for your circumstances once we review your enquiry.
Good to know
Do I need to charge GST/HST as a contractor or small business?+
What is the difference between GST, HST and PST?+
What is the GST and PST in B.C.?+
What is the HST rate in Nova Scotia?+
Which provinces charge HST?+
How do I calculate GST on a Canadian invoice?+
How do I read the result this calculator gives me?+
What does the GST/HST calculator not account for?+
Which rate applies if my client is in a different province than I am?+
Does this tell me how much GST/HST I owe CRA?+
When should I have my GST/HST numbers checked?+
More free tools for GST-registered owners
Worked out the tax on a sale? These answer the questions owners usually ask next.
Sources
The rates and thresholds behind this page. Rates change — check the source before relying on a figure.
General information, not advice. Have a CPA confirm it for your situation
Who this is for, and who it is not
This is for working out a number quickly. It is not a filing: when the return itself is due, we prepare and file it on a fixed fee.
What happens when you get in touch
Working the tax out is the easy half; filing it on time every period is the part people hand over.
- A free thirty-minute conversation. What you do, what is filed and what is overdue. You leave with a fixed fee in writing and no obligation to take it.
- Access, in the first week. We are authorized with the CRA, so notices and balances get looked up rather than requested from you. If you are switching firms, your file is requested the same week.
- Current, then ahead. Books set up or brought current, anything overdue scheduled oldest year first, and the next twelve months of deadlines set before they arrive.
Send an enquiry, or ask one question first — both go to a CPA, not a queue.
Where we work
The fee is the same wherever you are. The practice runs from the Abbotsford office and serves Chilliwack farms and trades, Langley owner-managed firms and Mission operators, across the wider Fraser Valley, and on to companies in Vancouver.
Want the exact numbers for your situation?
These tools are a starting point. Send an enquiry and we’ll run your real figures, and give you a fixed quote to handle it all.
Knowing the amount is half of it. When you have to file and remit it depends on your filing frequency.
Have a question about this?
Ask it free through the quick-question form and a CPA replies by email within one business day. For something that needs a proper look, a one-off Advice Call is a paid 45-minute session with a Chartered Professional Accountant: $225 plus GST, booked by email or phone with a secure payment link. It is credited against your first invoice if you become a client within 60 days. Looking for an accountant to take this on rather than an answer? Send an enquiry.
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