3. Cash vs Accrual Confusion<\/strong><\/span><\/h3>\n\nTo enable businesses to report BAS on either a cash or an accrual basis, the ATO permits businesses to mix the two; however, significant reporting discrepancies may arise. For example, a cash-basis business reporting on invoices issued (but not payments received) would overstate sales and could pay more GST than stipulated.<\/span><\/p>\n\n4. Oversight PAYG Withholding or Instalments<\/strong><\/span><\/h3>\n\n P<\/strong>AYG withholding is to be reported by businesses that employ staff. This is one of the most common errors: wages are either forgotten to be recorded in the Bas period or recorded in the incorrect category, creating compliance problems in payroll.<\/span><\/p>\n\n5. Incorrect Expense Coding<\/span><\/strong><\/h3>\n\nClaiming GST on ineligible or personal expenses, such as entertainment, meals with staff, or staff gifts, is a common mistake. Always remember to code your expense categories correctly before submission.<\/strong><\/span><\/p>\n\n6. Not Reviewing Automation<\/span><\/strong><\/h3>\n\nSome owners of small and medium businesses are confident in automation, even though cloud software such as Xero or MYOB simplifies accounting. The previous errors can be transferred to the new system as auto-categorised transactions or invoices are synced, so it is necessary to review them before submission.<\/span><\/p>\n\nWith STP data now flowing directly to the ATO in real time, any payroll figures auto-imported into your BAS need to be manually verified against your payroll reports before submission.<\/span><\/span><\/span><\/p>\n\n7. Quarterly Lodgement Gaps<\/strong><\/span><\/h3>\n\nMistakes of one quarter are likely to be transferred to the other. For example, missing a few items in recording a refund or credit note may lead to quarter-to-quarter reporting discrepancies.<\/span><\/p>\n\nConsider the example of a Sydney-based small business that incorrectly claimed GST on non-GST supplier purchases for two quarters. After discussing their accounts with a BAS agent, they found the mistake, corrected it, and received a refund from the ATO. Not only did this put their cash flow back on its feet, but it also salvaged their compliance record, showing that, despite minor mistakes, they can be mended with the proper support.<\/span><\/p>\n\nWhat's Changed for BAS in 2026: ATO Updates Every Business Must Know<\/strong><\/span><\/span><\/span><\/h2>\n\nThe compliance landscape for Australian businesses has shifted considerably heading into the 2025–26 financial year, and if your BAS process hasn't changed with it, you're carrying more risk than you realise.<\/span><\/span><\/span><\/p>\n\nSingle Touch Payroll Mismatches Are Now Auto-Flagged <\/strong><\/span><\/span><\/span><\/h3>\n\nThe ATO's systems now automatically cross-reference wages reported through Single Touch Payroll (STP) against the PAYG withholding figures in your BAS. If the numbers don't align, the discrepancy is flagged without any manual review needed on the ATO's end. This means payroll and BAS can no longer be treated as two separate jobs — they must be reconciled before every lodgement.<\/span><\/span><\/span><\/p>\n\nPayday Super Is Coming — Start Preparing Now<\/strong> <\/span><\/span><\/span><\/h3>\n\nFrom 1 July 2026, employers will be required to pay superannuation on the same day as wages under the new Payday Super legislation. While Super itself doesn't appear directly on your BAS, it affects your payroll cash flow and the accuracy of your PAYG reconciliations. Businesses that aren't prepared for this shift will feel the pressure at the next BAS period.<\/span><\/span><\/span><\/p>\n\nStricter Enforcement on Late Lodgements <\/strong><\/span><\/span><\/span><\/h3>\n\nThe ATO has publicly confirmed it is tightening compliance enforcement in 2026. Late BAS lodgements now attract faster penalty escalation, and businesses with outstanding debt over $100,000 may have that debt disclosed to credit reporting bureaus. Lodging on time — even a nil BAS — is no longer optional for healthy business governance.<\/span><\/span><\/span><\/p>\n\nPractical Strategies to Avoid BAS Errors<\/strong><\/span><\/h2>\n\nThe challenge of avoiding errors in lodging BAS is not only about correcting numbers; it involves creating good accounting habits that discourage errors. These workable plans will help you maintain your BAS precisely, compliantly, and without stress.<\/span><\/p>\n\n1. Make Reconciliation a Ritual<\/span><\/strong><\/h3>\n\nReconcile your bank accounts, supplier invoices, and customer payments before every BAS period. The reason you should reconcile regularly is to ensure that the figures in your accounting software align with how you actually moved money, i.e., there is no unreported income or duplicate transactions.<\/span><\/p>\n\n2. Smart Utilization of Technology<\/span><\/strong><\/h3>\n\nXero, QuickBooks, and MYOB are among the power tools used in cloud computing, but automation is not absolute. Check your software, ensure you set up GST coding correctly, and confirm that data transformation is complete before submitting.<\/span><\/p>\n\n3. Get GST Documentation Prepared<\/span><\/strong><\/h3>\n\nATO demands evidence for all GST claims. Keep copies of tax invoices, receipts, and supplier ABNs for all purchases or sales. Digital folders or cloud backups may make record-keeping auditable and straightforward.<\/span><\/p>\n\n4. Acquire Business Information Regularly<\/span><\/strong><\/h3>\n\nWhen your business information is altered (e.g., your address, registration status, or ABN), update the ATO as soon as possible. Detecting outdated information may result in a BAS lodgement rejection or a mismatch in reporting.<\/span><\/p>\n\n5. Apply a Pre-Lodgement Checklist<\/span><\/strong><\/h3>\n\nBefore submission, go through a quick review checklist:<\/span><\/p>\n\n\n\t- Did you make sure to check all GST codes?<\/span><\/li>\n\t
- Do you have the up-to-date payroll liabilities?<\/span><\/li>\n\t
- Has the reporting period (monthly or quarterly) been appropriately selected?<\/span><\/li>\n\t
- Did you not settle all the accounts?<\/span><\/li>\n<\/ul>\n\n
Such a simple measure can help to avoid serious reporting mistakes.<\/span><\/p>\n\n6. Outsource BAS Preparation<\/span><\/strong><\/h3>\n\nIn case of BAS lodgement overload, collaborating with a registered BAS agent can help save time, reduce risk, and ensure compliance with the ATO's existing rules. BAS agents are also informed about regulatory developments and can identify mistakes before they become costly.<\/span><\/p>\n\nThis is particularly relevant heading into the Payday Super era from July 2026 — a registered BAS agent will ensure your payroll, super, and BAS obligations are reconciled as one unified compliance process.<\/span><\/span><\/span><\/p>\n\nWhat To Do If You’ve Made a BAS Mistake?<\/strong><\/span><\/h2>\n\nEven seasoned business owners who use sophisticated accounting software will make BAS errors. The good news? The Australian Taxation Office (ATO) enables businesses to fix the majority of BAS errors with minimal effort, provided they detect and correct them in time.<\/span><\/p>\n\nHere's how to set things right:<\/span><\/p>\n\nStep 1: Determine Whether It’s a Small or Large Mistake<\/span><\/strong><\/p>\n\nNot every mistake is the same. ATO distinguishes between minor errors (such as errors in reporting GST amounts) and major issues or persistent ones (when numerous BAS periods are at issue). Check your accounting records and identify whether any of your mistakes fall within the correction range the ATO allowed.<\/span><\/p>\n\nStep 2: Determine the Correction Method<\/span><\/strong><\/p>\n\nA BAS error can be corrected in two significant ways:<\/span><\/p>\n\n\n\t- Include it in your next BAS:<\/span><\/strong> If your error falls within the correction thresholds of the ATO, you do not need to bother to amend in the following BAS statement. This suits small GST under and overclaims.<\/span><\/li>\n\t
- Revise the lodged BAS online:<\/span><\/strong> Review BAS lodged, in case of significant or multi-period errors, using ATO Online Services for Business or your Business relationship software (Xero or MYOB, etc.). This guarantees that your correction has been registered and confirmed.<\/span><\/li>\n<\/ul>\n\n
Step 3: Keep Evidence<\/span><\/strong><\/p>\n\nAlways retain supporting records – in the form of tax invoices, receipts, bank statements, and accounting notes – which demonstrate how you realized and rectified the mistake. Such records defend you against an ATO audit or scrutiny.<\/span><\/p>\n\nStep 4: Monitor for any Interest or Penalty Notices<\/span><\/strong><\/p>\n\nIf you were at fault and underpaid, the ATO can impose interest or penalties. Please check myGov Business and the ATO portal regularly, and act on any notices as soon as possible.<\/span><\/p>\n\nWhen to Seek Expert Help?<\/span><\/strong><\/h3>\n\nIn case of your BAS error in connection to GST credits and PAYG instalment, or a mistake in many reporting periods, it is preferable to reach a registered BAS agent or tax professional. They can negotiate with the ATO on behalf of the client to ensure the correct correction is applied in a tension-free manner.<\/span><\/p>\n\nHow To Lodge Your Changes Correctly?<\/strong><\/span><\/h2>\n\nIn 2026, correcting your BAS online will be as simple as ever; however, you need to be careful so the ATO accepts your change as soon as possible. The following are the steps to follow:<\/span><\/p>\n\nStep 1: Log in to ATO Online Services or BAS Software<\/span><\/strong><\/p>\n\nEnter the ATO Online Services for Business account, or file in the cloud application account (such as Xero or QuickBooks).<\/span><\/p>\n\nStep 2: Choose between “Revise BAS” or “Amend Lodgement”<\/span><\/strong><\/p>\n\nSelect the corresponding BAS period and select revise. This exposes the initial lodgement to editing.<\/span><\/p>\n\nStep 3: Put the corrected numbers and the reason.<\/span><\/strong><\/p>\n\nModify the figures (including GST collected or PAYG withheld) and provide a brief explanation of the correction—this will assist the ATO in understanding why the statistics have changed.<\/span><\/p>\n\nStep 4: Store Proof of Revision Confirmation<\/span><\/strong><\/p>\n\nAfter placing your order, print your revision confirmation receipt and save it as a record of your order.<\/span><\/p>\n\nStep 5: Revise ATO Authorization<\/span><\/strong><\/p>\n\n
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