31/07/2026
π€ We're going to share the single most common bookkeeping mistake we see from small business owners β and it's one of the most fixable.
Mixing personal and business finances in the same bank account.
We see it constantly. A business expense paid from a personal card. A personal bill paid from the business account. Cash sales deposited into a personal savings account. It seems harmless in the moment β but it creates enormous problems when it comes to BAS time, tax time, and any kind of financial planning.
Here's what mixing finances actually costs you:
π Your BAS figures become unreliable β you can't easily separate business GST from personal spending.
π You lose deductions β business expenses buried in a personal account often get missed entirely.
π Your bookkeeper or accountant spends hours untangling transactions β time that comes out of your pocket.
π You lose a clear view of actual business profitability β because personal costs are muddying the picture.
π It raises red flags if the ATO ever reviews your records.
The fix is simple β but it needs to be done properly:
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Open a dedicated business bank account. Use it exclusively for business income and expenses.
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Get a separate card for business purchases.
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Pay yourself a regular, documented draw or wage β rather than taking money ad hoc.
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If you're registered for GST, consider a third account specifically for setting aside your GST.
Starting the new financial year is the perfect time to get this right.
π Winner + Co β We help you set the foundation correctly from day one.