This estimate is for informational purposes only. This tool provides a rough estimate and is not a substitute for the advice of an accountant. For advice tailored to your situation, Bankeo will find you the ideal accountant for free, with no obligation.
Find an AccountantEnter the subtotal or the total including tax, and specify whether tax is already included.
The calculator automatically applies the Ontario HST rate of 13%. You can also use the selector above to switch to another Canadian province or territory as needed.
View the subtotal, the HST (13%), and the total including taxes, ready to use on your invoices.
In Ontario, the sales tax is the HST (Harmonized Sales Tax) at 13%. This is a single tax that combines the federal portion (5%) and the provincial portion (8%), administered by the Canada Revenue Agency (CRA). Unlike the two-tax system in some provinces, Ontario does not add a separate provincial tax: a single rate of 13% applies. The calculator above applies this 2026 rate by default. Understanding how it works is essential for billing correctly and claiming back the taxes paid on your business purchases.
The HST is applied as a percentage of the pre-tax subtotal: in Ontario, 13% is added to the pre-tax price to arrive at the total. Since this is a single harmonized tax, there is no separate federal and provincial calculation on your invoice: the combined rate of 13% is applied as a single amount. The calculator uses this exact rate and applies it automatically, which prevents rounding errors in your billing.
A taxable sale (the majority of cases) is charged at the full HST rate, which is 13% in Ontario. A zero-rated sale is charged at 0%, but the business can generally recover the tax paid on related purchases. An exempt sale carries no tax, and the business cannot recover the tax paid on related inputs. Ontario also applies point-of-sale rebates on certain goods (children’s clothing, books, prepared food items under $4, among others), for which the provincial portion of the HST is deducted.
| Item | What the tool displays |
|---|---|
| Country and Jurisdiction | Ontario is the default setting (13% HST), with the option to switch to other Canadian provinces and territories |
| Applicable Rates | Ontario’s 2026 HST (13%), or the rates in effect in the selected jurisdiction |
| Calculate Total Including Taxes | Subtotal, HST, and total calculated automatically |
| Convert from tax-inclusive to tax-exclusive | Reverse calculation based on a total amount including tax |
| Cases with Multiple Rates | Single HST in Ontario; federal and provincial taxes combined in provinces with two tax rates |
| Update | 13% HST (Ontario), 2026 rates adjusted by jurisdiction |
The Ontario HST rate (13%) is displayed by default; other rates appear based on the selected jurisdiction. Official source: Canada Revenue Agency (CRA), rates effective in 2026.
By default, the calculator applies Ontario’s 13% HST: a single tax that combines the federal portion (5%) and the provincial portion (8%), administered by the Canada Revenue Agency (CRA). Certain categories of goods are eligible for point-of-sale rebates, are zero-rated, or are exempt. The selector also allows you to calculate rates for other Canadian provinces or territories.
Enter your total amount (including tax) and specify that the tax is already included: the tool calculates the subtotal excluding tax by dividing by 1.13 (the combined Ontario HST rate), then isolates the HST amount. In Ontario, since the tax is harmonized, only a single tax is calculated. Our calculator performs these calculations automatically.
In Ontario, a business must register and collect HST once its taxable sales exceed the $30,000 threshold. Once registered, the business charges HST to its customers, files periodic returns, and remits the net tax to the CRA. An accountant can confirm your obligations based on your business activity and situation.
In Ontario, HST registration becomes mandatory once taxable sales exceed $30,000 over four consecutive quarters; below that threshold, the business is considered a small supplier. Below this threshold, the business generally does not charge HST, but it also cannot claim a refund for the HST paid on its purchases. Voluntary registration remains an option to claim these tax credits.
A registered business can deduct the HST it paid on its business expenses from the HST it collected on its sales, and then remit the difference to the CRA (or receive a refund if the amount is negative). In Ontario, this recovery is facilitated through ITCs.
Bankeo helps entrepreneurs find the ideal accountant, specializing in HST, tax returns, and bookkeeping. The service is free for entrepreneurs. Our team understands your situation, your industry, and your needs, then connects you with vetted accountants who can manage your tax returns and tax strategy, and continues to support you along the way.
A Complete Guide to How the GST and HST Work for SMEs.
Read the article →Registration steps, required documents, and deadlines.
Read the article →Calculation, filing frequency, and remittance requirements.
Read the article →How to Reclaim Taxes Paid on Your Business Purchases.
Read the article →Calculate sales tax in another province:
Quebec (GST/QST) · British Columbia (GST and PST) · Alberta (GST) · Manitoba (GST and PST) · Saskatchewan (GST and PST) · Nova Scotia (HST) · New Brunswick (HST)
Bankeo helps entrepreneurs find the ideal accountant who specializes in taxation, sales taxes, and tax filings. It’s a free service with no obligation, and we’re here to support you every step of the way.
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