Missing an HST filing deadline is one of the most common — and most avoidable — ways Ontario businesses end up paying penalties and interest to the CRA. Understanding your filing frequency and what’s actually due when can save you real money.

Your filing frequency depends on your revenue

The CRA assigns your HST filing frequency based on your annual taxable sales: smaller businesses typically file annually, mid-sized businesses file quarterly, and larger businesses file monthly. You can request a different frequency if it suits your cash flow better.

The general pattern

• Monthly filers submit their return and payment one month after each reporting period ends.
• Quarterly filers do the same — one month after the quarter closes.
• Annual filers generally have more time to file, but the payment deadline often falls earlier than the filing deadline — a detail that catches people out every year.

Why this trips up so many business owners: it’s easy to assume one deadline covers both filing and payment. It frequently doesn’t. The safest approach is to know both dates for your specific filing frequency and fiscal year-end — they’re not the same for every business.

How to stay ahead of it

• Confirm your exact filing frequency and both deadlines in your CRA My Business Account
• Set calendar reminders two weeks and one week before each due date
• Keep your books up to date year-round, not just before a deadline

If you’re not sure which deadlines apply to your business, our team can confirm your exact filing calendar and make sure nothing slips through. Call +1-905-279-6367 to book a free consultation.