Phone or Text
587-872-0602

One blog post closer to clean books.

Each blog post from the Castle team is packed with practical tips, real-world experience, and clear answers to common bookkeeping questions. Whether you're sorting expenses or planning for tax time, you'll find guidance to help you run your business with clarity and confidence.

No fluff, no jargon—just useful content written by people who actually do the work. We’re here to make the numbers make sense.

Terms of Service

Welcome to Castle! These terms of service outline the rules and regulations for the use of our bookkeeping services.
By accessing this website and using our services, you accept these terms and conditions in full. Do not continue to use Castle services if you do not accept all of the terms and conditions stated on this page.

1. Services Provided
Castle offers professional bookkeeping services including transaction categorization, reconciliations, financial reporting, GST/HST filing, and other related services as agreed upon with the client.

2. Billing and Payments
All services provided by Castle  are billed on a recurring basis unless otherwise
agreed upon. Payments are due upon receipt of invoice. We accept payment via credit card, debit card, and electronic funds transfer.

3. Cancellation and Refund Policy
Clients may cancel services at any time by providing 30 days’ notice in writing or via email. Refunds for prepaid services will be prorated based on the remaining unused portion of the services.

4. Privacy Policy
Our privacy policy outlines how we collect, use, and protect your personal information. We do not sell or share your information with third parties without your consent, except as required by law.

5. Liability
Castle will perform all services with reasonable care and skill. However, we do not accept liability for losses resulting from acts of nature, third-party errors, or misuse of financial information or reports by the client.

6. Amendments
Castle reserves the right to amend these terms of service at any time. Amendments will be effective immediately upon posting on this website.

7. Contact Us
If you have any questions about this privacy policy or our privacy practices, please contact us at:

Castle
316 1st Ave NE
Phone: 587-872-0602
Email: info@bookwithcastle.com
Phone or Text
587-872-0602

One blog post closer to clean books.

Each blog post from the Castle team is packed with practical tips, real-world experience, and clear answers to common bookkeeping questions. Whether you're sorting expenses or planning for tax time, you'll find guidance to help you run your business with clarity and confidence.

No fluff, no jargon—just useful content written by people who actually do the work. We’re here to make the numbers make sense.
Our Blog

Bookkeeping for Small Business Owners — Part 22

September 24, 2025

Avoiding Common Bookkeeping Mistakes

Even the most diligent small business owners slip up when it comes to their books. These mistakes may seem minor, but over time they can distort your financial picture and cause headaches with the CRA. Knowing what to avoid is half the battle.

Frequent Mistakes to Watch Out For

  • Mixing personal and business expenses — Using the same account for both creates confusion and makes tax time a nightmare.
  • Forgetting to record small expenses — Coffee with a client or mileage to a meeting adds up. Missing them means missed deductions.
  • Not reconciling accounts — Skipping monthly bank reconciliations leads to errors that snowball.
  • Ignoring GST/HST rules — Failing to charge, collect, or remit properly can result in costly penalties.
  • DIY without review — Software is helpful, but mistakes go unnoticed if a professional never reviews your books.

How to Stay on Track

  • Keep business and personal completely separate.
  • Log expenses as they happen — don’t rely on memory.
  • Reconcile monthly to catch errors early.
  • Stay informed on GST/HST obligations.
  • Have a bookkeeper or accountant check your work at least annually.

Pro Tip

Think of bookkeeping like car maintenance: small, consistent care prevents big breakdowns later. Catching mistakes early saves you time, stress, and money.

The Big Picture

Mistakes in bookkeeping aren’t just inconvenient — they can cost you deductions, distort your financial picture, and invite CRA trouble. With good habits and occasional professional oversight, you can avoid these pitfalls and keep your books clean.

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