Top 5 Bookkeeping Mistakes Small Businesses Make
How to Avoid Them
Managing your own bookkeeping might seem easy at first — until small errors start adding up and cause big financial headaches.
At Soren Accounting & Advisory, we’ve worked with many small businesses across Melbourne, Sydney, Adelaide, and Perth, and we often see the same avoidable mistakes that lead to cash flow issues, missed BAS deadlines, or even ATO penalties.
In this post, we’ll walk you through the five most common bookkeeping mistakes small businesses make and how you can avoid them.
1️⃣ Mixing Business and Personal Expenses
This is one of the biggest mistakes small business owners make.
When personal and business expenses are paid from the same account, it becomes difficult to track deductible expenses and prepare accurate financial reports.
How to avoid it:
Open a dedicated business bank account. Use business debit or credit cards for all business purchases. Record personal expenses separately to avoid confusion during BAS or tax time.
2️⃣ Not Reconciling Bank Accounts Regularly
Bank reconciliation helps ensure your financial records match your actual bank balance. Many business owners skip this step for months — only to discover missing transactions or duplicate entries later.
How to avoid it:
✔ Reconcile your bank and credit card accounts weekly or at least monthly.
✔ Use accounting software like Xero or MYOB to automate reconciliation.
✔ Review any discrepancies immediately.
3️⃣ Forgetting to Track GST Correctly
Incorrectly coding GST on invoices or purchases can lead to inaccurate BAS reports — and that can cost you time and money if the ATO requests adjustments.
How to avoid it:
Understand when to charge GST and when not to. Make sure your accounting software is set up correctly for GST. Work with a registered BAS Agent to review your reports before lodgement.
4️⃣ Ignoring Payroll Compliance
Managing payroll involves more than just paying staff — you also need to calculate PAYG withholding, superannuation, and ensure compliance with Fair Work obligations.
How to avoid it:
✔ Use STP-compliant payroll systems.
✔ Keep employee records updated.
✔ Lodge your payroll reports on time through your accounting software.
5️⃣ Not Backing Up or Reviewing Data
Relying only on one device or manual records can be risky. A small data loss can wipe out months of financial history.
How to avoid it:
✔ Store all records in cloud-based systems like Xero or MYOB.
✔ Schedule monthly reviews of your financial data.
✔ Regularly download backup copies for extra security.
Bookkeeping mistakes can happen to anyone — but with a little structure and professional support, you can stay on top of your business finances.
At Soren Accounting & Advisory, we help small businesses across Melbourne simplify their bookkeeping, stay BAS-compliant, and make confident financial decisions.
If you’re ready to take control of your numbers and stop worrying about bookkeeping errors, we’d love to help.
0421 003 815
info@sorenaccounting.com.au
