How to Do Bookkeeping for GST, Payroll, and BAS Reporting
Published on April 28, 2025
Do you find it hard to stay on top of your business expenses and financial records? Many small business owners face this challenge, especially when dealing with GST, payroll, and BAS reporting. Most small businesses want to avoid mistakes that could affect their tax bill or lead to penalties. By learning bookkeeping basics and using double entry bookkeeping, you can record transactions accurately and prepare financial statements like a balance sheet.
Accounting software and other bookkeeping tools help you track accounts receivable, accounts payable, and cash flow on a day to day basis. With a simple bookkeeping system, you can manage your financial data, understand your financial performance, and make tax returns easier. Staying on top of basic bookkeeping helps you keep your records organised and gives you more time to focus on running your business.
Why Good Bookkeeping Matters for Your Business
Accurate bookkeeping is about more than just ticking boxes for the tax office. It’s the foundation for making informed decisions, planning for growth, and staying compliant with Australian laws. When your financial data is up to date, you can spot issues early, avoid last-minute scrambles, and feel confident that you’re meeting your obligations.
Many small businesses find GST, payroll, and BAS reporting particularly challenging. These areas are closely linked, and mistakes in one can cause problems in the others.
GST: Keeping Track of What You Owe and What You Can Claim
If your business is registered for GST, you need to collect GST on your sales and pay it to the ATO. At the same time, you can claim credits for the GST you’ve paid on business expenses. Keeping clear records of both is essential. If your records are incomplete or inaccurate, you might pay more than you need to—or risk penalties for underpayment.
Using accounting software or a general ledger can make it easier to record transactions and track GST on a day-to-day basis. This helps you understand your cash flow and ensures your accounts reflect what your business owns and owes.
Payroll: Paying Your Team Correctly and On Time
Payroll isn’t just about paying wages. You also need to withhold the right amount of tax, pay superannuation, and report everything to the ATO. Mistakes can lead to unhappy employees, fines, or even legal trouble. Good payroll records help you keep track of entitlements, leave, and other important details. Proper payroll management is a key bookkeeping duty, especially as your business grows.
BAS Reporting: Bringing It All Together
The Business Activity Statement (BAS) is where you report your GST, PAYG withholding, and other taxes. It’s a summary of your business’s financial activities for the accounting period. Accurate bookkeeping makes BAS reporting straightforward and helps you avoid surprises at tax time.
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Simple Steps for Managing GST, Payroll, and BAS
Staying on top of your bookkeeping doesn’t have to be complicated. By following a few simple steps, you can make the process much easier and reduce the risk of errors in your accounts.
Setting Up Your Bookkeeping System
The first step is to choose a bookkeeping system that suits your business. Many businesses use accounting software because it helps automate calculations and keeps everything in one place. Make sure your system lets you track GST, payroll, accounts receivable, accounts payable, and expenses separately.
If you’re not sure which software to use, look for one that is user-friendly and offers good support. Cloud-based bookkeeping tools can be especially helpful because they let you access your records from anywhere and often include automatic updates for tax rates and rules.
Recording GST on Sales and Purchases
Whenever you make a sale, issue a tax invoice that clearly shows the GST amount. Keep copies of all invoices you send and receive. For purchases, make sure you get tax invoices from your suppliers so you can claim GST credits.
It’s a good idea to set aside time each week to enter your sales and purchases into your bookkeeping system. This habit makes it easier to spot unpaid bills, keep your accounts payable and accounts receivable up to date, and maintain accurate record keeping.
Running Payroll the Right Way
When you pay your employees, record each payment, including wages, tax withheld, and superannuation. Make sure you’re using the latest tax tables and super rates. Many payroll systems will do the calculations for you, but it’s still important to check that everything is correct.
Keep records of timesheets, payslips, and any changes to employment conditions. This information will help you answer questions from your team and meet your reporting obligations. As your business grows, you may consider hiring a professional bookkeeper or accountant to help manage payroll and ensure compliance.
Preparing and Lodging Your BAS
At the end of each reporting period—usually every quarter—you’ll need to prepare your BAS. Your bookkeeping system should be able to generate the figures you need. Double-check that your GST, payroll, and other amounts match your records.
Once you’re confident everything is correct, lodge your BAS online or through your tax agent. Make sure you pay any amounts owing by the due date to avoid penalties. Keeping your accounts and financial statements organised will make this process much smoother.
Tips to Make Bookkeeping Easier
Bookkeeping can feel like a chore, but there are ways to make it less daunting. Here are some practical tips to help you stay organised and save time while managing your financial transactions.
Keep Your Records Up to Date
Don’t let receipts and invoices pile up. Set aside regular time each week to update your records. This habit makes it easier to find information when you need it and reduces the risk of errors in your ledger.
Use Technology to Your Advantage
Modern accounting software can automate many tasks, such as calculating GST, generating payslips, and preparing BAS reports. Take advantage of these bookkeeping tools to save time and reduce mistakes in your financial reports.
Stay Informed About Changes
Tax rules and rates can change. Make it a habit to check for updates from the ATO or ask your accountant to keep you informed. This way, you’ll always be working with the latest information and your financial data will be accurate.
Ask for Help When You Need It
If you’re unsure about something, don’t hesitate to ask for help. A qualified accountant or professional bookkeeper can provide advice tailored to your business and help you avoid costly mistakes. This support can be especially valuable as your small business grows and your bookkeeping duties become more complex.
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Common Bookkeeping Mistakes and How to Avoid Them
Even with the best intentions, mistakes can happen. Here are some common pitfalls and how you can steer clear of them, whether you’re handling your own bookkeeping or working with a bookkeeper.
Mixing Business and Personal Expenses
It’s important to keep your business and personal finances separate. Use a dedicated business bank account and credit card. This makes it easier to track your business expenses and claim the right deductions.
Forgetting to Reconcile Accounts
Regularly check that your bookkeeping records match your bank statements. This process, known as reconciliation, helps you spot missing transactions or errors before they become bigger problems in your general ledger.
Missing Deadlines
Late BAS lodgements or payroll payments can lead to penalties. Use reminders or calendar alerts to keep track of important dates. Accounting software often includes these features, helping you stay on top of your accounting period and reporting obligations.
Overlooking Small Transactions
It’s easy to forget about small cash purchases or incidental expenses. Make it a habit to record every transaction, no matter how minor. These can add up over time and affect your GST and BAS reporting, as well as your net profit.
When to Get Professional Support
While many business owners manage their own bookkeeping, there are times when it makes sense to get help. If your business is growing, your finances are becoming more complex, or you simply want peace of mind, a professional bookkeeper or accountant can make a big difference.
An accountant can help you set up your systems, check your records, and make sure you’re meeting all your obligations. They can also provide advice on tax planning, business structure, and ways to improve your cash flow and financial performance.
Conclusion
Good bookkeeping is essential for managing GST, payroll, and BAS reporting. By keeping your records up to date, using the right bookkeeping tools, and seeking help when needed, you can reduce stress and focus on growing your business. Staying organised not only helps you meet your obligations but also gives you a clearer picture of your business’s financial health, assets, and income.
If you’d like support with your bookkeeping or have questions about GST, payroll, or BAS, our friendly team at ACT Tax Group is here to help. Reach out to us today and take the first step towards easier, stress-free financial management.
Lukasz Klekowski
