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Bookkeeping mistakes with potentially costly fixes.

  • Writer: K. McLaren CPA, CGA
    K. McLaren CPA, CGA
  • Sep 28
  • 2 min read
Bookkeeping isn’t always the most exciting part of running a business.  But here’s the truth:  ignoring it, or getting it wrong, can end up costing you a lot more than just time. 

We’ve seen small mistakes snowball into expensive clean-up jobs that business owners never planned for.  Here are some common bookkeeping mistakes that individuals and small businesses often make:

🔢 1. Mixing Personal and Business Finances
  • Using the same bank account or credit card for both personal and business expenses.
  • Makes tracking business finances and tax filing difficult.

📅 2. Not Keeping Books Up-to-Date
  • Delaying data entry or reconciliation can lead to forgotten transactions and errors.
  • Leads to inaccurate financial reporting.

🧾 3. Missing Receipts or Documentation
  • Not saving receipts or backup for expenses.
  • Makes audits, tax deductions, and verifying transactions harder.

🧮 4. Incorrectly Categorizing Transactions
  • Misclassifying income or expenses (e.g., treating an asset purchase as an expense).
  • Affects financial reports and tax liabilities.

💳 5. Failing to Reconcile Bank and Credit Card Statements
  • Not matching bookkeeping records with actual bank/credit card statements.
  • Can hide discrepancies, fraud, or missed entries.

🗂️ 6. Not Tracking Accounts Receivable/Payable
  • Forgetting to track who owes you money (or what you owe).
  • Can lead to cash flow problems or missed payments.

🧑‍💻 7. Manual Errors in Data Entry
  • Typing mistakes, duplications, or omissions.
  • Can skew reports and lead to poor business decisions.

📊 8. Ignoring Financial Reports
  • Not reviewing income statements, balance sheets, or cash flow reports.
  • Misses trends, red flags, or areas for improvement.

📆 9. Not Backing Up Data
  • If using software without backup, losing data due to technical failures.
  • Leads to permanent loss of financial records.

🧾 10. DIY Bookkeeping Without Knowledge or Support
  • Trying to handle everything without understanding accounting basics.
  • Leads to compounding errors, especially around taxes or compliance.

✅ Tips to Avoid These Mistakes:
  • Use accounting software (like QuickBooks, Xero, or Wave).
  • Set a weekly schedule for bookkeeping tasks.
  • Keep receipts and digitize them.
  • Separate business and personal finances.
  • Work with a professional bookkeeper or accountant periodically.


Each of these items might seem small on its own, but together, they can create a mess that’s time-consuming and costly to fix.  Clean-ups often mean sifting through months of receipts, re-entering transactions, and correcting reports, all of which take extra hours and, unfortunately, higher fees. 
 
The ripple effect doesn’t stop there.  Inaccurate books can also:

·   Delay your ability to apply for loans or grants because the numbers aren’t ready.
·   Leave you unprepared for tax season, increasing the chances of penalties and interest.
·   Make it harder to make confident business decisions because the data you’re relying on just isn’t accurate.

Timing matters, so start your clean-up now, before the holiday season, because by then, bookkeeping professionals are already swamped and it becomes much harder to get the help you need quickly. 

The good news?  With consistent bookkeeping and clear systems, you can avoid these problems altogether.  And if you don’t want to do it alone, we’re here to help.  We’ll keep your numbers accurate and up to date, give you regular insights into your business performance and make sure you’re ready for tax time with no last-minute surprises.
 
 
 

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