September Canadian Business Due Dates & Three Fabulous Business Resources!


Hello Reader!

Welcome to August 31st 2026! In this Newsletter:

  • What’s due at the end of August?
  • My Three Favorite Resources for September!
  • What due dates are coming up in September?
  • Updates

What’s Due End of August?

  • If you are incorporated, and you owed greater than $3k in corporate Income Tax for your previous fiscal year, then you are required to pay installments for next year on the last day of every month. August 31st is the due date for the August Corporate Tax Installment.
  • Though there are no other standard items due at the end of this month, be aware that if your Sales Tax filing is monthly, July's GST/HST filing and remittance is due on August 31st. If your Sales Tax quarterly filing is on a different schedule because of a corporate fiscal year end date that is not standard, the GST/HST for a quarter May to July would be due Aug 31st. Also, if your Corporate Fiscal Year End is February, your Corporate Tax Return is due 6 months after your Fiscal Year end (August 31st). If your Corporate Year End is June, the Income Tax Payable is payable 2 or 3 months after the Fiscal Year End; either due end of August or end of September, depending on your corporation. Check in with your accountant to find out more about your corporate tax due dates specific to your corporation.

My Three Favorite Resources for September!

  1. How to find what comprises Line 101 Sales and Revenue on the QuickBooks Online QBO GST/HST Module: QuickBooks has changed their reports in QBO, and the report we used to provide the details of line 101, Sales and Revenue on the GST/HST report and module now no longer works. In this video I show you the workaround to see the detailed list of transactions that comprises Line 101 Sales and Revenue on the QBO GST/HST Module.
  2. Ministry of Labour Ontario Free Information Sessions: If you are in Ontario and have Employees, then these free live Webinars can help bring clarity the the ESA. (Scroll to the bottom of this page). Up next on Sept 16th: Employment Standards Act Hours of Work and Overtime Pay Overview.
  3. Telus #StandWithOwners 2026: If you're reading this before Sept 2nd, you can apply for a chance to win $125,000 in funding, technology and exposure and become part of a thriving community of Canadian business owners. Find out more here!

What Resources have you found that have helped you start, run, or grow your business? Feature it (and a callout to your business!) in our next Resources Newsletter!

What due dates are coming in September?

Now’s the time to prep your September Calendar! #BeThatBusiness that is organized! Here are some September due dates that might affect your business:

  • September 7th is Labour Day. Labour Day takes place each year on the first Monday in September. Find out how that may impact your payroll here.
  • If you have employees, September 15th is the due date for your payroll source deductions relating to August's payroll if you are a regular remitter.
  • If you have employees, then you likely are registered for provincial Workplace Insurance (WSIB/WCB). WCB in some provinces is due monthly, and on the 15th. In Ontario, WSIB is due quarterly, and the premiums on earnings from July to Sept are due on Oct 31st.
  • If you owed greater than $3k in personal income tax for two years in a row, then you are required to pay quarterly installments for next year. They don't match the business quarterly schedule though. September 15th is the next personal income tax installment due date.
  • If you are incorporated, and you owed greater than $3k in corporate Income Tax for your previous fiscal year, then you are required to pay installments for next year on the last day of every month. September 30th is the due date for the September Corporate Tax Installment.​
  • Though there are no other standard items due at the end of this month, be aware that if your Sales Tax filing is monthly, August's GST/HST filing and remittance is due on September 30th. If your Sales Tax quarterly filing is on a different schedule because of a corporate fiscal year end date that is not standard, the GST/HST for a quarter June to August would be due September 30th. Also, if your Corporate Fiscal Year End is March, your Corporate Tax Return is due 6 months after your Fiscal Year end (September 30th). If your Corporate Year End is July, the Income Tax Payable is payable 2 or 3 months after the Fiscal Year End; either due end of September or end of October, depending on your corporation. Check in with your accountant to find out more about your corporate tax due dates specific to your corporation. Check out CRA's "Quick Reference Guide" for more information.

Updates:

QBO BANK FEED MINI COURSE: I'm launching a "Mini Course Series" of courses on my website. Shorter than my Masterclass Courses and my in depth bookkeeping simulation, these mini courses will be less than an hour each and will be a quick hit of the foundational concepts that I have found to be useful to know and build understanding on. First up, "QuickBooks Online Bank Feed Mini Course". Why? Because understanding the bank feed is KEY to understanding QBO. To avoid QBO Chaos, these are a not a "Nice to Know", they're a "Need to Know".

IS ADVISORY REALLY THE FUTURE OF BOOKKEEPING? I keep hearing that "Advisory" is the future of the bookkeeping industry in this coming age of AI, but nobody seems to define what that actually means, and I don't think it captures what our future really looks like. In my second post of the sister newsletter "The Source Documents", I break down why I push back against the traditional expectations of advisory, and what our true superpower as bookkeepers will be in the age of AI. This newsletter is separate from this one, intended for bookkeepers and firm owners. Sign up here if that's you.

FABULOUS FIRST FRIDAYS @FIVE!: Looking to connect? Join my live FABULOUS FIRST FRIDAYS @FIVE open Zoom Meeting! My Monthly Open AMA Zoom Chat Session where we can connect and discuss questions regarding all things bookkeeping and business in Canada. It's a free group event where anyone can drop by to say hi and ask a question! Click here to register! Next one is Friday September 4th.

Be Intentional Today!
Get out there, and Be That Business That Thrives!

Naomi Wilkins, CPB
I Love Making Bookkeeping Make Sense

www.naomiwilkins.ca

Need more than a First Friday fix?
Here are a few ways I can help:

QBO GST/HST Module Fix
QBO File Health & Reliability Review
Nifty Nomi One-on-One Zoom Session

Let's Get Social!

Disclaimer: This Newsletter is intended to inform readers in general terms. It is not intended to provide any tax or business advice. Please consult your accountant if you have any questions about your unique situation. While I have tried to ensure the accuracy of the information in this newsletter, I accept no liability for errors or omissions.

Be That Business Newsletter

You want to "Be That Business" – the one that's organized, informed, and thriving. But to get there, you need to understand how your business actually works. That's where the "Be That Business Newsletter" comes in. Each month, you'll receive essential Canadian business deadlines for the month ahead, plus practical tips and resources to help you master your records, data processes, and the inner workings of your business. Let's move beyond just ticking boxes and build a business with intention. You cannot manage what you do not monitor, but knowing what and how to monitor efficiently and accurately avoids wasted time, money, and double work. Compliance is the foundation, but understanding how your business actually works and leveraging that information and data for growth? That’s where the magic happens! ✨

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