HST Calculator Ontario 2026: Net HST Owed + Filing Frequency

Free Canadian Tax Tool · Insight CPA

HST Calculator Ontario 2026: Net HST Owed + Filing Frequency

Estimate your net HST owed (HST collected minus Input Tax Credits) and see whether CRA requires you to file monthly, quarterly, or annually. Uses the current 13% Ontario HST rate and the $1.5M / $6M filing-frequency thresholds under the Excise Tax Act regulations.

Calculator

How to use this tool

  1. 1
    Enter your annual taxable sales. Include all HST-taxable sales for the year before HST. Exclude exempt supplies (rent of residential property, most financial services, most health & educational services).
  2. 2
    Enter your ITC-eligible purchases. Add up HST paid on business expenses eligible for Input Tax Credits. This is the HST amount you paid, not the pre-tax purchase price.
  3. 3
    Choose province and current filing frequency. Provincial selection sets the HST rate. Filing-frequency lets us tell you if CRA would require a different cadence.
  4. 4
    Read your result. You will see HST owed (net of ITCs), CRA-required frequency, and the next filing deadline. If you are near a threshold, plan for the frequency change 12 months out.

Frequently asked questions

What HST rate does this calculator use?
13% for Ontario (federal 5% + provincial 8%). We also support the 15% HST rate for New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland & Labrador. Alberta, BC, MB, SK, QC, YT, NT, and NU use GST + provincial sales tax and are outside the HST-only tool’s scope.
When does CRA require monthly or quarterly HST filing?
CRA sets your assigned filing frequency based on annual taxable supplies: under $1.5M you may file annually, $1.5M-$6M requires at least quarterly, and over $6M requires monthly. You can always elect to file more frequently than required to improve ITC cash-flow.
What counts as an Input Tax Credit (ITC)?
HST you paid on business inputs used to make taxable supplies: rent, professional fees, supplies, equipment, and most operating costs. Meals & entertainment ITCs are 50% (aligned with the 50% income-tax deduction). Personal-use portions and exempt-supply inputs are not ITC-eligible.

Optional · Enhanced Report

Get the CPA-reviewed PDF version (optional)

The calculation above is free to use as is — no email required. If you would like a printable 1-page PDF summary plus a filing checklist tailored to your filing frequency, share your details below and we will email it. Unsubscribe any time.

We use your email to send the PDF and short educational follow-ups. Unsubscribe any time. See our privacy policy.