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✦ Tools & Resources

Reverse HST Calculator: Remove GST/HST From Any Total (2026)

Enter any tax-included total and get the pre-tax amount and the sales tax you paid, using 2026 rates for every province and territory.

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Pre-tax amount{{ fPreTax }}
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Total paid{{ fTotal }}
Sales tax is {{ taxPct }} of what you paid in {{ provName }}.
Starting from a pre-tax price instead? Use the GST/HST Calculator to add tax.
Sales tax on {{ fTotal }} across Canada
Tax portion of the same receipt total, by province.
Rates current for 2026 (Nova Scotia HST 14%). Estimates for general information only and not a substitute for professional tax advice.
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How to remove HST from a total

Divide the total by 1 plus the tax rate. In Ontario, where HST is 13%, a $1,130 receipt divided by 1.13 gives a pre-tax amount of $1,000, so the HST is $130.

Taking 13% off the total doesn't work: 13% of $1,130 is $146.90, which overstates the tax by $16.90. The tax was added to the pre-tax price, so it has to be removed the same way.

If you're starting from a price before tax, use the HST Calculator instead.

✦ Good To Know

GST/HST Frequently Asked Questions

Most receipts, card statements and "all-in" quotes only show the total. To record an expense in your books, claim input tax credits or check that a supplier charged the right rate, you need the pre-tax amount and the tax as two separate figures.

If your business is registered for GST/HST, yes: the tax you paid on business purchases comes back as input tax credits on your return. Keep your receipts: for purchases of $100 or more, the receipt must show the supplier's GST/HST number to support the claim.

If you're not registered yet, you must register once your taxable sales pass $30,000 over four consecutive calendar quarters. For help with registration or returns, call (905) 814-0111 or see our GST/HST filing service.

Yes. In HST provinces, there is a single rate to remove. In British Columbia, Manitoba, Saskatchewan and Quebec, the GST and the provincial tax are both calculated on the pre-tax price, so you divide by 1 plus the combined rate. In Quebec, that means dividing by 1.14975 (5% GST plus 9.975% QST).

Alberta, the Northwest Territories, Nunavut and Yukon only charge the 5% GST: divide by 1.05. Pick your province in the calculator and it applies the right rate for you.

It almost always will. A gap of a cent or two can appear when a store rounds the tax line by line or mixes taxable and zero-rated items, such as basic groceries, on one receipt. For your books and your returns, use the amounts printed on the invoice. If reconciling receipts eats your evenings, our bookkeeping service can take it over.

What's the difference between GST, HST and PST?

The GST (goods and services tax) is the 5% federal sales tax charged across Canada. Ontario, New Brunswick, Newfoundland and Labrador, Nova Scotia and Prince Edward Island combine it with their provincial portion into one harmonized sales tax (HST): 13% in Ontario, 14% in Nova Scotia and 15% in the other three.

British Columbia, Saskatchewan and Manitoba charge their own provincial sales tax (PST, called RST in Manitoba) on top of the GST, and Quebec charges the QST. Alberta and the three territories have no provincial sales tax, so only the 5% GST applies.

How much of a tax-included total is actually tax?

It's less than the rate suggests, because the rate applies to the pre-tax price, not to the total. In Ontario, HST makes up 13/113 of any total, or about 11.5%. At 15% (New Brunswick, Prince Edward Island and Newfoundland and Labrador), the tax is about 13% of the total, and at Nova Scotia's 14%, about 12.3%. The province chart higher up on this page shows this share for every province.

How do I separate the GST from the provincial portion?

Find the pre-tax amount first, then apply each rate to it. A $112 receipt in British Columbia is $100 before tax: $5 of GST and $7 of PST.

In an HST province, the federal share is still 5% of the pre-tax amount. On a $1,130 total in Ontario, the $130 of HST breaks down into $50 of GST and $80 of the provincial portion. You need that split when an item qualifies for Ontario's point-of-sale rebate of the 8% provincial portion, such as children's clothing.

Which rate applies when I buy from a business in another province?

For goods, it's generally the rate of the province where they're delivered, not where the seller is. A laptop shipped by a registered Alberta retailer to an Ontario address should carry 13% HST, not just the 5% GST, so choose the delivery province in the calculator. Services follow their own place-of-supply rules, which usually look at the customer's address.

Unsure whether you should be charging HST?
Farrukh Ahmed, CPA, has served Mississauga since 1995 and handles bookkeeping, GST/HST filing and tax preparation. Get it right before the CRA asks. Responses within 24 hours.
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