Q2 HST Installment Deadline July 31 2026 — What Ontario Businesses Must Pay
Quick Answer
If your business files HST annually and your prior-year net tax was $3,000 or more, your Q2 HST installment is due July 31, 2026. Miss it and CRA charges arrears interest from the due date. This article explains who must pay, how to calculate the amount, where to pay, and the consequences of a late or missed installment.
Who Must Pay HST Installments?
Annual GST/HST filers whose net tax for the prior fiscal year was $3,000 or more must pay quarterly installments in the current year. This threshold applies to the business as a whole — if you have branches or divisions that file separately, the $3,000 limit is measured against total net tax across all branches.
Monthly and quarterly filers are not affected. The installment obligation applies specifically to annual registrants. If you file GST/HST monthly or quarterly, you already remit with each return and do not owe separate installments.
The Four HST Installment Due Dates
For annual HST registrants with a December 31 fiscal year-end, the installment schedule is:
| Quarter | Period Covered | Due Date |
|---|---|---|
| Q1 | January 1 – March 31 | April 30, 2026 |
| Q2 | April 1 – June 30 | July 31, 2026 ← NOW DUE |
| Q3 | July 1 – September 30 | October 31, 2026 |
| Q4 | October 1 – December 31 | January 31, 2027 |
The general rule from CRA: installments are due within one month after the end of each fiscal quarter. If the due date falls on a Saturday, Sunday, or CRA-recognized public holiday, the payment is on time if received by or postmarked on the next business day.
Three Ways to Calculate Your Installment Amount
CRA allows three methods. You may choose any method each quarter — and you can switch methods from quarter to quarter if your situation changes.
Method 1 — Prior Year Method (Simplest)
Divide your prior year’s net tax by four:
Q2 installment = Prior year net tax ÷ 4
Example: If your 2025 net HST remittable was $28,000, your Q2 2026 installment is $28,000 ÷ 4 = $7,000.
This method protects you from installment interest even if your current-year tax ends up higher — as long as you pay 1/4 of the prior year each quarter, CRA will not charge installment interest (though you may owe the balance when you file your annual return).
Method 2 — Estimated Current Year Method
Estimate your current-year net tax and divide by four:
Q2 installment = Estimated 2026 net tax ÷ 4
Use this method if your business revenue has dropped significantly from the prior year and you want to reduce your installment payments. If your estimate is too low and you underpay, CRA will charge installment interest on the shortfall.
Method 3 — Balance Owing (Net Tax Calculation)
Calculate your actual net tax for the quarter based on your HST collected minus ITCs (Input Tax Credits) claimed during the period. This is the most accurate but requires the most recordkeeping. It is often used by businesses with highly seasonal revenue that does not distribute evenly across quarters.
How to Pay Your Q2 HST Installment
CRA accepts HST installment payments through several channels:
- My Business Account (CRA online): Log in to your CRA My Business Account and pay directly via online banking or debit. This is the fastest method and provides instant confirmation.
- My Payment: CRA’s Visa Debit / Mastercard Debit payment portal at canada.ca/my-payment. Credit cards are not accepted.
- Financial institution: Pay at your bank’s business counter or through online banking (add CRA as a payee using your HST Business Number).
- Mail: Mail a cheque payable to the Receiver General of Canada. Allow at least 10 business days for delivery to arrive by July 31.
Important: Your payment must reference your GST/HST Business Number (BN) and the period it covers. Misapplied payments are common — verify on My Business Account after payment to confirm correct allocation.
What Happens If You Miss the July 31 Deadline
Missing your Q2 HST installment triggers arrears interest at the CRA prescribed rate, compounded daily, starting from July 31, 2026 on the unpaid amount. The prescribed interest rate changes quarterly — verify the current rate at canada.ca or in your CRA My Business Account.
Unlike income tax installments, HST installments do not carry a separate instalment interest penalty if you pay the prior-year amount — the protection only applies when you consistently pay 1/4 of the prior year on time each quarter. A single missed quarter breaks the protection retroactively for that quarter.
There is no fixed late-filing penalty for the installment itself (unlike the annual HST return, which carries a 1% penalty plus 0.25%/month up to 12 months). However, if your total annual remittance is insufficient at year-end, both arrears interest and potential penalties on the annual return may apply.
Common Mistakes Ontario Businesses Make
- Using the wrong year’s net tax. The installment is based on your prior year net tax (2025), not your current-year estimate unless you choose Method 2.
- Paying to the wrong account. HST installments are separate from payroll source deductions and corporate income tax installments. Use your GST/HST BN when remitting.
- Forgetting about fiscal year differences. If your HST fiscal year differs from your corporate fiscal year (uncommon but possible), the quarter-end dates shift accordingly.
- Assuming a quiet quarter means no obligation. Even if Q2 revenue was low, your installment obligation is based on the prior year — not current-quarter activity — unless you elected Method 2.
- Leaving it to the accountant without confirming payment. The obligation to pay rests with the registrant. Confirm your accountant’s role — they may calculate the amount but not initiate the payment.
ITCs and the Net Tax Calculation
Your installment is based on net tax — HST collected minus Input Tax Credits (ITCs). Businesses with significant ITC claims (e.g., large capital purchases, construction inputs, or eligible professional services) may find their net tax substantially lower than the gross HST collected. If your ITCs reduce your net tax below $3,000 in the current year, you may no longer owe installments next year.
Track your ITCs diligently throughout the year. Missed ITCs inflate your net tax artificially and create unnecessarily large installment obligations.
Case Illustration — Mississauga Franchise Owner Avoids $1,200 in Interest
Composite illustration; client details anonymized.
A Mississauga franchise owner filed HST annually with 2025 net tax of $44,000. On advice from Bader A. Chowdry, CPA, CA, LPA, they set up a recurring bank transfer of $11,000 per quarter to the Receiver General (using the prior-year method). When Q2 arrived on July 31, 2026, the payment posted automatically — no scrambling, no interest. Their prior-year method also protected them from installment interest even though Q2 revenue was higher than Q1, meaning their actual Q2 liability was closer to $14,000. They owed the difference on the annual return, but paid zero installment interest.
Frequently Asked Questions
Q: I just registered for HST this year — do I owe installments?
A: No. Installments apply to annual filers whose prior-year net tax was $3,000+. If this is your first year, there is no prior year — so no installment obligation. You will owe at your first annual filing.
Q: I switched from annual to quarterly filing this year. Do I still owe a Q2 installment?
A: No. Quarterly filers remit with each quarterly return — they do not owe separate installments. The installment regime applies only to annual filers.
Q: My HST year-end is March 31, not December 31. Is my Q2 still due July 31?
A: No. Your installment due dates are based on your fiscal quarters. With a March 31 year-end, Q1 ends June 30 (due July 31), Q2 ends September 30 (due October 31), and so on. Confirm your specific due dates in My Business Account.
Q: Can I pay more than the required installment?
A: Yes. Overpayments are credited to your account and applied against future amounts owing (including the annual balance at filing). CRA does not refund installment overpayments mid-year, but they reduce what you owe at year-end.
Q: Is there a way to reduce installments if my revenue dropped sharply?
A: Yes — use Method 2 (estimated current-year method). Calculate your expected 2026 net tax based on actual Q1 results and your projection, then pay 1/4 of that. If you underestimate and your actual tax is higher, installment interest will apply on the shortfall.
Important — informational only, not advice. Do not use this article to make any decision.
This article is published by Insight Accounting CPA Professional Corporation for general educational purposes only. It is not tax, legal, accounting, financial, or investment advice, and nothing in this article should be relied upon — by anyone, for any purpose — to make a business, tax, financial, accounting, legal, or investment decision.
Tax law, CRA administrative positions, court interpretations, and Ontario provincial rules change frequently, sometimes retroactively, and the content of this article may be incomplete, simplified, out of date, or wrong by the time you read it. The right answer for your specific situation depends on facts this article does not know — your structure, history, jurisdiction, filings, contracts, and goals.
Before acting, engage your own Chartered Professional Accountant or qualified advisor who has reviewed your specific circumstances in writing. Insight Accounting CPA Professional Corporation, the author, and any contributors expressly disclaim all liability — direct, indirect, or consequential — for any action taken or not taken on the basis of this content.
Insight Accounting CPA Professional Corporation is led by Bader A. Chowdry, CPA, CA, LPA — licensed by CPA Ontario under the Public Accounting Act, 2004. To engage us for situation-specific advice, book a free 30-minute discovery call.
