Introduction: BAS & GST — Critical Compliance Areas for Australian Businesses
For small and medium enterprises (SMEs) operating in Australia, Business Activity Statement (BAS) lodgement and Goods and Services Tax (GST) management are among the most important — and often confusing — compliance obligations. Accurate BAS and GST reporting ensures you meet your Australian Taxation Office (ATO) responsibilities while avoiding costly penalties.
At Professional Bookkeeping Service (PBS), we simplify BAS preparation and GST management, ensuring your business stays compliant, accurate, and stress-free.
What is a Business Activity Statement (BAS)?
BAS Definition
A Business Activity Statement (BAS) is a government form submitted to the ATO, summarising a business’s:
- GST collected and paid
- PAYG withholding obligations
- PAYG instalments (if applicable)
- Other tax obligations (e.g. Fringe Benefits Tax, Wine Equalisation Tax)
Your BAS lodgement frequency depends on your business size and GST turnover:
| GST Turnover | BAS Lodgement Frequency |
| $20M+ | Monthly |
| <$20M | Quarterly (most common for SMEs) |
| Voluntary | Monthly or Quarterly |
What is GST?
GST Definition
Goods and Services Tax (GST) is a 10% consumption tax applied to most goods, services, and other items sold or consumed in Australia.
- Businesses registered for GST must collect GST on taxable sales.
- GST collected must be reported and remitted to the ATO through BAS.
- Businesses can claim GST credits on business-related purchases (Input Tax Credits).
Who Needs to Register for GST?
Australian businesses must register for GST if:
- Annual turnover exceeds $75,000
- For non-profit organisations: turnover exceeds $150,000
- Taxi or ride-share drivers (regardless of turnover)
Failure to register when required may result in ATO penalties and unpaid tax liabilities
Components Reported in BAS Lodgement
1. GST Collected (Output Tax)
GST charged on sales and taxable supplies.
2. GST Paid (Input Tax Credits)
GST paid on business purchases and expenses.
3. PAYG Withholding
Tax withheld from employee wages.
4. PAYG Instalments (for some businesses)
Estimated income tax pre-payments based on prior earnings.
5. Other Taxes (if applicable)
- Fringe Benefits Tax (FBT)
- Luxury Car Tax (LCT)
- Wine Equalisation Tax (WET)
Why Accurate BAS Lodgement is Crucial
Avoid ATO Penalties
Late or inaccurate BAS lodgements can trigger fines, interest charges, and audits.
Maintain Cash Flow Accuracy
Overstating GST credits or underreporting sales creates future cash flow shortfalls.
Reduce Audit Risk
Consistent, accurate BAS submissions reduce ATO audit likelihood.
Keep Clean Historical Data
Clean reporting helps future tax returns, business loans, and business sale valuations.
Common BAS Lodgement & GST Mistakes Made by SMEs
| Mistake | Consequence |
| Late lodgement | Penalties and interest charges |
| Incorrect GST classification | Overpaid or underpaid GST |
| Missing invoices or receipts | Incomplete GST credit claims |
| Incorrect PAYG calculations | Underpayment or overpayment of tax |
| Not reconciling accounts | Ongoing reporting errors |
Software Solutions for BAS and GST Management
Cloud-Based Platforms
At Professional Bookkeeping Service (PBS), we specialise exclusively in Xero for ongoing BAS and GST management.
While we have experience with platforms like MYOB and QuickBooks, we only support them during short-term migration periods. Once onboarded, all our clients are transitioned to Xero to ensure streamlined processes, consistent reporting, and simplified compliance.
Benefits of Automation with Xero
Using Xero, we provide:
- Real-time GST tracking
- Automatic calculation of Input Tax Credits and GST payable
- ATO-integrated BAS lodgement
- Error reduction through automated reconciliations
How Professional Bookkeeping Service (PBS) Simplifies BAS Lodgement & GST for Australian SMEs
At PBS, we handle the full BAS and GST process:
- GST registration and setup
- Ongoing GST coding for all transactions
- Accurate BAS calculations
- Timely BAS submissions to ATO
- PAYG withholding reporting
- Full ATO compliance management
- Record retention for audit-readiness
With PBS managing your compliance, you avoid late lodgements, missed payments, and ATO penalties — while freeing up time to focus on business growth.
Frequently Asked Questions
Can I lodge my own BAS?
Yes, but professional management helps avoid errors, maximises GST credits, and reduces audit risk. Many SMEs prefer to outsource BAS preparation.
What happens if I miss my BAS lodgement deadline?
The ATO applies late lodgement penalties and may charge interest. Persistent lateness can trigger audits and stricter ATO scrutiny.
Is GST charged on all my sales?
Some items are GST-free (e.g. basic food, some medical services). We ensure correct GST classification for every transaction.
Get Professional BAS Lodgement & GST Management Support
Professional Bookkeeping Service (PBS) provides complete BAS Lodgement and GST Management solutions for Australian SMEs. Our expert team handles the entire compliance process — accurately, on time, every time.
Contact us today for a free consultation.
