BAS Preparation Guide: A Checklist for Australian Businesses

If you're running a business in Australia and registered for GST, one of your essential tasks is lodging your Business Activity Statement (BAS) with the Australian Taxation Office (ATO). The BAS reports your business’s tax obligations, including Goods and Services Tax (GST), Pay As You Go (PAYG) withholding, and other tax liabilities. Proper BAS preparation can save you time, ensure compliance, and help you avoid costly penalties. 

In this guide, we’ll walk you through how to prepare your BAS, and provide a handy checklist to ensure nothing is missed.

What is a BAS?

A Business Activity Statement (BAS) is a tax report submitted to the ATO by businesses that are registered for GST. Your BAS allows you to report and pay:

- Goods and Services Tax (GST)

- PAYG Withholding (tax withheld from employee wages)

- PAYG Instalments (if applicable for your income tax obligations)

- Fringe Benefits Tax (FBT) instalments (if applicable)

- Luxury Car Tax (LCT) and Fuel Tax Credits (for businesses in certain industries)

Most businesses lodge their BAS either monthly or quarterly, depending on their GST turnover. 

Preparing Your BAS: Step-by-Step Guide

BAS preparation can seem daunting, especially for new business owners, but with the right approach and tools, it can be a straightforward process. Follow these steps to make your BAS preparation easier and more accurate:

Organise Your Financial Records

Accurate and up-to-date financial records are critical when preparing your BAS. Before you start, make sure:

- All invoices and receipts are organised: You should have clear records of all your sales, purchases, and expenses. Use accounting software to manage these, or maintain a well-structured filing system.

- Bank accounts are reconciled: Ensure that your bank statements match the transactions in your accounting software. Reconciling your accounts helps you spot any discrepancies early.

- Invoices and receipts for GST claims are valid: To claim GST credits, you must have a valid tax invoice for purchases over $82.50 (including GST).

Calculate Your GST

GST is a major component of your BAS. Here’s how to calculate your GST obligations:

- GST on Sales (GST Collected): Add up the total GST you've charged your customers for sales during the reporting period.

- GST on Purchases (GST Paid): Add up the total GST you've paid to suppliers on business purchases for which you can claim credits.

The difference between these two amounts is what you either pay to or claim from the ATO. If GST collected exceeds GST paid, you’ll owe the ATO. If GST paid exceeds GST collected, you’ll be entitled to a refund.

Report PAYG Withholding

If you employ staff, you must report the PAYG tax you’ve withheld from their wages. This ensures that the ATO receives the correct tax instalments from your employees’ pay. To calculate:

- Total wages: Include the gross wages paid to employees for the period.

- PAYG withheld: This is the total amount of tax withheld from those wages. Your payroll system or accountant should calculate this for you.

Review PAYG Instalments

If the ATO has notified you that your business must pay PAYG instalments, you’ll also report these on your BAS. PAYG instalments are prepayments towards your annual income tax liability, and you’ll need to enter the instalment amount on your BAS form.

You can either use the instalment amount provided by the ATO or calculate your own if your circumstances have changed.

Check for Other Obligations

Depending on your business, you may also have to report additional items on your BAS:

- Fringe Benefits Tax (FBT) instalments: If your business provides fringe benefits to employees, such as company cars or entertainment, you may have to pay FBT. The ATO will notify you if this applies.

- Luxury Car Tax (LCT) and Fuel Tax Credits (FTC): These apply to specific industries and goods. If applicable, you’ll report these on your BAS.

Complete and Lodge Your BAS

Once you’ve calculated all your obligations, you’re ready to complete your BAS form. You can lodge your BAS in several ways:

- Online via the ATO Business Portal: This is the fastest and most convenient method.

- Through your accounting software: Most cloud-based accounting programs, such as Xero or MYOB, allow you to lodge your BAS directly with the ATO.

- Through your accountant or BAS agent: If you prefer, you can have a registered BAS agent or accountant prepare and lodge your BAS on your behalf.

Once lodged, make sure you pay any amounts owing by the due date to avoid penalties or interest.

BAS Checklist: What You Need Before Lodging

Here’s a handy checklist to make sure you have everything in order before submitting your BAS:

1. Financial Records in Order  

   - All income and expense transactions are recorded

   - Tax invoices and receipts are organised

   - Bank accounts are reconciled

2. GST Calculations  

   - Total GST collected from sales is calculated

   - Total GST paid on purchases is calculated

   - Adjustments for GST credits or refunds are made

3. Payroll and PAYG Withholding  

   - Gross wages for all employees are recorded

   - PAYG withheld amounts are calculated and ready to report

4. PAYG Instalments  

   - ATO-provided instalment amount is ready, or  

   - You’ve calculated a new PAYG instalment amount (if circumstances have changed)

5. Other Obligations (if applicable)  

   - FBT instalments calculated

   - Luxury Car Tax and Fuel Tax Credits are ready to report

6. Final Review  

   - Double-check all figures for accuracy

   - Ensure your BAS form is complete

7. Lodgement Method  

   - Decide how you will lodge (online, through your accountant, etc.)

   - Ensure lodgement is made before the due date

BAS Due Dates

The due date for lodging your BAS depends on your reporting cycle:

- Quarterly BAS: Due on the 28th of the month following the end of each quarter (28 October, 28 February, 28 April, and 28 July).

- Monthly BAS: Due on the 21st of the following month.

If the due date falls on a weekend or public holiday, the BAS must be lodged by the next business day.

Tips for Streamlining BAS Preparation

- Use Accounting Software: Automating your accounting processes with software like Xero, QuickBooks, or MYOB will save time and reduce errors.

- Keep Records Up-to-Date: Set aside time each week to reconcile accounts, upload receipts, and record transactions. This will make BAS preparation much quicker when the time comes.

- Work with a BAS Agent: If BAS preparation is overwhelming or time-consuming, consider hiring a registered BAS agent. They’ll ensure your BAS is accurate and lodged on time, freeing you to focus on running your business.

Final Thoughts

Preparing and lodging your BAS doesn’t have to be stressful. By keeping your financial records organised, regularly reconciling your accounts, and following this checklist, you’ll be well-prepared to complete your BAS accurately and on time. Remember, lodging on time is crucial to avoid penalties, so stay on top of your reporting obligations and seek professional advice if needed.

Following these steps ensures you meet your tax responsibilities and keep your business running smoothly.