2M+
BAS lodgements processed by Australian firms annually
Zero
ATO compliance issues since handover — our case study
24h
Standard BAS working file turnaround

The BAS Preparation Burden on Australian Accounting Practices

Every quarter, Australian businesses registered for GST must lodge a Business Activity Statement (BAS) with the ATO. For accounting firms servicing dozens or hundreds of GST-registered clients, BAS season is one of the most labour-intensive periods of the year — a predictable surge that strains capacity, compresses margins and creates partner-level bottlenecks.

The mathematics are sobering: an accounting firm with 200 quarterly BAS clients, where each BAS preparation takes an average of 2.5 hours, faces 500 hours of billable BAS work every quarter. At an average staff cost of $45/hour, that's $22,500 of in-house labour every quarter — $90,000 annually — just for BAS preparation alone.

Outsourcing BAS preparation to a qualified offshore team cuts this cost by 55–65% while maintaining the same quality, accuracy and ATO compliance your clients expect.

Key BAS Compliance PointBAS lodgements must be completed by a registered tax agent or BAS agent under the Tax Agent Services Act 2009. OrtusPro Global prepares the BAS working file and supporting reconciliations, which your registered tax agent reviews and lodges. This is the correct and compliant division of labour.

What BAS Preparation Work Can Be Outsourced?

GST Reconciliation and Coding Review

The most time-consuming element of BAS preparation is reconciling GST collected (from sales) against GST credits claimed (from purchases), and verifying that all transactions have been coded correctly. Our team reviews the client's Xero or MYOB file, identifies miscoded transactions, corrects them with a clear audit trail, and prepares the GST reconciliation workpaper showing the BAS figures.

Common GST coding errors we identify and correct include:

  • Personal expenses coded as business expenses with GST credits claimed
  • Input-taxed transactions (residential rent, financial services) incorrectly coded as GST-claimable
  • Capital acquisitions that should be apportioned between business and private use
  • International transactions incorrectly coded as taxable supply (should be GST-free)
  • ATO, bank fees and superannuation contributions where no GST should be claimed

PAYG Withholding Reconciliation

For businesses with employees, the BAS includes PAYG withholding obligations. Our team reconciles payroll data against the PAYG withholding amounts reported in the BAS, ensuring consistency between the payroll records and the ATO lodgement.

PAYG Instalment Calculations

For clients on quarterly PAYG instalments, we calculate the correct instalment amount based on the prior year tax liability, apply any variation requests, and include the instalment in the BAS working file.

Fuel Tax Credits

For clients in eligible industries (agriculture, construction, mining, transport), fuel tax credits are claimed via the BAS. Our team calculates the correct fuel tax credit claim based on fuel purchase records and the applicable rate for each fuel use category.

Fringe Benefits Tax (FBT) Instalments

For clients registered for FBT, quarterly BAS lodgements may include FBT instalment obligations. We prepare the FBT instalment calculation and include it in the BAS working file for partner review.

Xero and MYOB BAS Report Preparation

Our team is proficient in preparing BAS reports directly from Xero (using the GST report and BAS module) and MYOB (using the tax codes report and BAS reconciliation). The completed BAS report — including all supporting workpapers — is returned to your firm for review and lodgement via the ATO Portal or ATO Online Services for Agents.

Quality Control: How We Ensure BAS Accuracy

BAS errors are costly. An incorrect GST figure can trigger an ATO amendment, a general interest charge (GIC) of approximately 9.17% per annum on outstanding amounts, and a shortfall penalty of up to 75% of the tax shortfall for deliberate avoidance. For an accounting firm, a client BAS error also carries significant reputational risk.

OrtusPro Global's BAS preparation process includes a mandatory two-layer quality review before any work leaves our team:

  1. Preparer review — the assigned accountant completes the BAS working file and self-checks against the reconciliation workpaper
  2. Quality supervisor review — a senior team member reviews the coding, the GST figures and the workpapers before the package is returned to your firm

Only after both layers sign off does the BAS preparation package leave our team. The result is a lodgement-ready file that your partner or registered tax agent can review and lodge with confidence.

BAS Preparation Keywords: What Australian Firms Are Searching For

If you are researching "outsource BAS preparation Australia", "BAS lodgement service", "outsource GST reconciliation" or "BAS agent outsourcing", it is worth clarifying the terminology:

  • BAS preparation — the preparation of the BAS working file and supporting reconciliations. This can be performed by a non-registered preparer under the supervision of a registered tax or BAS agent.
  • BAS lodgement — the actual submission of the BAS to the ATO. This must be performed by a registered tax agent or BAS agent. OrtusPro Global prepares; your registered agent lodges.
  • GST reconciliation — the process of reconciling GST reported in the BAS against the accounting records. This is the most critical component of BAS accuracy.

Integrating BAS Outsourcing With Your SMSF and Bookkeeping Workflow

For accounting firms that also administer SMSF funds, BAS outsourcing pairs naturally with SMSF bookkeeping outsourcing. A single offshore team can handle the SMSF annual preparation work in the quiet Q1 and Q3 periods, and scale up to handle BAS preparation during the Q2 (January) and Q4 (July) lodgement peaks. This smooths the offshore team's workload and maximises your cost efficiency year-round.

Similarly, combining BAS outsourcing with ongoing Xero bookkeeping outsourcing means the offshore team is maintaining the client's Xero file month-to-month — making BAS preparation faster, more accurate and less likely to generate queries when the BAS period arrives.

Start With a Free BAS Trial Job

Submit one client's Xero or MYOB file and we will prepare the complete BAS working file — GST reconciliation, PAYG withholding reconciliation and all supporting workpapers — at no charge. You review it, assess the quality, and decide whether to proceed. Dedicated resources can be onboarded within 48 hours of your first call. Contact us to get started.