Tools

Ontario HST Calculator 2026

Sales tax calculator, HST 2026

Use this Ontario HST calculator to estimate invoice totals, verify quote pricing, and explain tax clearly to clients in 2026.

This Ontario sales tax calculator helps businesses and freelancers calculate HST from a before-tax subtotal or reverse-calculate tax from a tax-included total, so invoice and quote totals stay clear and accurate.

Tax Calculator

Ontario Sales Tax Calculator

Enter a before-tax or tax-included amount to calculate HST instantly.

CAD

HST

13%

Combined

13%

Breakdown

Subtotal
$100.00
HST (13%)
$13.00
Total tax
$13.00
Final total
$113.00

How Ontario sales tax works

  • Ontario applies a single harmonized sales tax (HST) rate of 13% on most taxable supplies.
  • For forward calculations, apply 13% HST to your taxable subtotal to get the final invoice total.
  • For tax-included prices, reverse calculation helps separate the HST amount from the final price.
  • Invoices should clearly show subtotal, HST rate, HST amount, and final amount due.
  • If your business sells in multiple provinces, place-of-supply rules can affect which tax rate applies.

Ontario rebates and exemptions

  • Some supplies are zero-rated and taxed at 0%, while others are exempt; both are treated differently from fully taxable sales.
  • Items such as basic groceries and certain qualifying medical products may be zero-rated under federal rules.
  • Certain services, including many financial services and some residential rent scenarios, can be exempt from HST.
  • Tax treatment can vary by transaction type, customer type, and industry; verify unusual cases with official CRA guidance before filing.

Filing and invoicing notes for Ontario

Ontario businesses that must register for HST generally need to collect and remit tax on taxable supplies.
Keep consistent records of subtotal, HST collected, and tax-included totals across quotes, invoices, and books.
If you convert estimates into invoices, apply the same HST logic end-to-end to avoid reconciliation issues.
Rates, rules, and exceptions may change over time. Confirm final compliance details using current CRA requirements.

Frequently asked questions

What is the Ontario sales tax rate in 2026?

Ontario uses HST at 13% for most taxable goods and services in 2026.

How do I calculate HST on an Ontario invoice?

Multiply the taxable subtotal by 13% to find HST, then add that tax amount to the subtotal to get the final total.

Can I use an Ontario tax included calculator for reverse HST?

Yes. Enter the tax-included total to estimate the pre-tax amount and isolate the HST portion for bookkeeping and invoice clarity.

Do all Ontario businesses need to charge HST?

Not always. Charging and registration depend on your business status, taxable activities, and applicable CRA thresholds.

Is this Ontario HST calculator useful for quotes and service pricing?

Yes. It helps you prepare clear quotes, customer-facing price explanations, and invoice-ready tax breakdowns quickly.

More Canadian tax calculator pages

We are expanding this tools library province by province. Quebec is live first, with more Canadian tax calculator pages planned next.

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