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The most common mistakes with an accountant – and how to avoid them

28/10/2025

Even the best entrepreneurs fall into these traps... The good news is that they are preventable. Here is an ultra-concrete checklist to strengthen your collaboration with your accountant, avoid costly mistakes, and regain control over your management (and choose the right tools with the most used accounting software in Quebec).

🧩 What you'll find out in this checklist

Do you think your accountant "manages everything"? Do you validate his requests without looking too much? Don't you dare to ask questions?

You're not alone. These mistakes are frequent... but not a fatality.
With this checklist, you will:

Ready? We roll out the checklist 👇

📋 The complete checklist to avoid mistakes with your accountant

1. 🤔 Thinking that "the accountant will manage everything"

"I pay an accountant, so he takes care of everything."
False. Your accountant needs your input to do his job properly.

A good accountant can only process what you give him. If there are missing invoices, contracts, receipts... The file is incomplete. And you risk mistakes or penalties.

What you can do:

2. 🛑 Not validating what is submitted

To sign without reading is to sign blindly. Even if you trust your accountant, you are still legally responsible.

An incorrect VAT/GST-QST, an incomplete tax registration (see the GST/QST registration guide), an incorrect figure on your balance sheet, an oversight of the SAR... These small mistakes can be very costly in the long run (and result in an unpleasant notice of assessment ).

What you can do:

3. 🗣 Never ask questions

"I don't want to disturb..."
You're not supposed to be a chartered accountant. It's normal not to understand everything.

A good accountant must be able to clearly explain accounting figures and decisions. And when you need a tax professional, understanding the difference between roles is helpful (and don't hesitate to find the right tax professional if needed for your tax planning).

What you can do:

  • Take notes of your questions as you go
  • Offers a 30-minute check-in every quarter (think of this guide for effective appointments)
  • Uses a fast communication channel (Notion, WhatsApp...)

4. 📅 Being late on documents

Delay is the enemy of quality. And tax compliance.

Your accountant needs time to get it right. Sending your documents the day before a deadline means exposing yourself to errors or penalties. Anticipate your year-end and don't wait until the last moment for your GST/QST instalments.

What you can do:

  • Create a recurring reminder in your calendar (e.g. every 1st of the month)
  • Use a tool like Indy, Pennylane, or Sage to automate
  • Give them access to your business banking area if relevant and track your cash flow
  • Prepares the expected parts for the compilation mission in advance

5. 📂 Keep documents scattered

An invoice by email, another by paper, a third on WhatsApp? Your accountant can't keep up.

Centralized archiving is essential for clean accounting (and respects mandatory document retention deadlines).

What you can do:

  • Organize your docs in a shared folder structured by month (see our record-keeping guide)
  • Uses a scanning tool with automatic recognition (e.g. Scanbot)
  • Avoids sending documents "as they happen" through all channels

6. 💬 Not talking to the accountant about your plans

Are you planning to be hired? Are you going to create a subsidiary? Talk about it before you do it.

Your accountant can help you anticipate the fiscal, social or financial impacts.
But he must be aware (also think of subjects such as tax registration, incorporation or the corporation).

What you can do:

7. 🕵️ ♂️ Never check your accounts

It's not because you delegate that you have to give up everything.

A quick monthly reading of your accounts helps to avoid errors and oversights (and to optimise your costs thanks to the full cost method or the ABC method).

What you can do:

8. 📉 Don't challenge the numbers

If your margin drops or your bottom line drops, it may be time to investigate.

Your accountant is there to help you analyze, understand, and optimize. Think about the combination of accounting + taxation, the method of analysis centres and your level of solvency.

What you can do:

9. 💸 Not checking fees

You pay for a service: it is normal to understand what you are buying.

Sometimes services are charged additionally, or certain services are not included in the package.

What you can do:

10. 🧱 Not Building a Real Relationship

An accountant is not just a supplier. It is a strategic partner.

The more transparent, organized and communicative you are... the more he will be able to help you.

What you can do:

  • Exchange regularly, not only at the end of the year
  • Give them feedback on what works (and what doesn't)
  • Share your vision and priorities (set SMART goals)

💬 Do you want to go through this checklist together?

At Bankeo, we believe that accounting should never be a source of stress.
Our mission: to help you avoid pitfalls, regain control and build a smooth collaboration with your accountant (or ours 😉). To go further, also discover our guide to finding the ideal accountant, our chartered accountant guide and how to find the right pro for your business taxes online. Need an accountant in Montreal or Quebec City ?

👉 Do you want us to go through this checklist together?
Write to us!

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