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Ontario HST calculator

Ontario charges one sales tax, the 13% HST: 5% federal and 8% provincial, collected together by the Canada Revenue Agency. The calculator adds HST to a price or takes it out of a total.

Rates checked on September 25, 2026 against the official sources listed below.

Calculation

For example 1,234.56 or 1234,56

Amount before tax
$100.00
HST (13%)
$13.00
Total
$113.00

Rates in force

TaxRateSinceCollected by
HST (harmonized sales tax)13%July 1, 2010Canada Revenue Agency

One tax, two parts

On July 1, 2010, the HST replaced Ontario's 5% GST and 8% provincial retail sales tax. The rate has not moved since: 13%. An invoice shows the HST as a single 13% rate without splitting the federal and provincial parts; that is what the CRA asks for.

Some items skip the 8% provincial part through a point-of-sale rebate, printed books and children's clothing among them. The customer then pays 5%. The calculator uses the general 13% rate; for those items, pick Alberta (5%) in the list.

Registering and filing

HST works like GST: you register with the CRA once your taxable supplies pass $30,000 over four consecutive calendar quarters, or within a single quarter, and you file in My Business Account or through GST/HST NETFILE. There is no separate provincial number and no second return.

What decides the rate is the place of supply, not the seller's address. A Vancouver store that delivers a mattress to Toronto charges 13% HST, and an Ontario business that delivers to Manitoba charges the 5% GST instead of HST, plus Manitoba RST if it has to collect it.

One example, both ways

Adding the taxes: $250.00
Amount before tax$250.00
HST (13%)$32.50
Total$282.50
Removing the taxes: $500.00
Amount before tax$442.48
HST (13%)$57.52
Total$500.00

To remove the taxes, divide the total by 1.13, then check that the price you get plus its rounded taxes adds back up to the total.

In QuickBooks Online

In QuickBooks Online, go to All apps, Sales Tax, Overview, pick Ontario, then the filing frequency and reporting method. QuickBooks creates one agency, the CRA, and the most common Ontario tax codes, the 13% HST among them.

By default QuickBooks takes your business address as the place of sale. For a delivery outside Ontario, change the location on the transaction and the rate follows, as long as the customer's shipping address is right.

→ Guide: filing a GST/HST return from QuickBooks Online

Quick answers

What does a $100 item cost in Ontario with tax?

$113.00: $100 plus $13 of HST.

Why doesn't $100 including tax give an exact amount?

Because no price produces exactly $100.00 once the HST is rounded to the cent. At $88.49 the HST is $11.50 and the total $99.99. At $88.50 the HST is $11.505, rounded to $11.51, and the total $100.01. The calculator keeps the HST of $88.49 and adds the leftover cent to the amount before tax, so the figures still add up to $100.00.

How do I take HST out of an amount?

Divide the total by 1.13. For $500 including tax: 500 ÷ 1.13 = $442.48 before tax and $57.52 of HST.

Before the return, in QuickBooks

This calculator settles one invoice at a time. If your books are in QuickBooks Online, Caribooks has an Autopilot loop, Sales tax check, that goes over last month before the return. It flags each sale or purchase with no tax code, with a code unusual for that customer or vendor, or with tax that does not match its code's rate, then totals the tax collected, paid and net for each tax agency. It only reads: nothing in your books changes.

What Caribooks doesPlans

Other provinces and territories

Sources

Every rate and rule on this page comes from the official pages below, read on September 25, 2026.