
BAS and IAS Lodgement
Business Activity Statement (BAS)
A bookkeeper prepares and lodges BAS on behalf of the business, which involves reporting GST collected and paid, PAYG withholding, and other tax obligations. They ensure accurate records, timely lodgment, and compliance with the Australian Taxation Office (ATO) requirements.
Instalment Activity Statement (IAS)
For businesses not registered for GST or those needing to report PAYG withholding or instalments, a bookkeeper handles IAS preparation and lodgment. They calculate amounts owed, ensure accurate reporting, and help the business avoid penalties.
By managing BAS and IAS, bookkeepers ensure businesses meet their tax obligations efficiently and on time, giving owners peace of mind and reducing the risk of errors or late fees.


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Real Feedback from Satisfied Clients
“Highly recommend Olive Tree Bookkeeping. Reliable, knowledgeable of the latest taxation regulations, along with providing valuable business accounting insights. Angela has been looking after my business bookkeeping for over 6 years. We would be lost without her.”
Fiona Baldwin
Highland Fling Pty Ltd
“OTB has brought my business back up to the current era. She instills a huge amount of confidence in me and feels more like a member of our team than a contractor. She is thorough, precise, and fantastic to deal with.”
Jaclyn Merlino
Specialized Construction Pty Ltd
“As an accountant, we use Olive Tree Bookkeeping to refer our clients to. You know you will be in good hands with your numbers with Angela.”
Mark Calleja
Mark Calleja Accounting Pty Ltd
“OTB & Angela have been with us for many years now. Since they’ve started with us, they have completely turned around our business. We are now on top of ‘the backend’ of the business, which gives us the time and peace of mind to just focus on what we are good at, landscaping! Angela is very professional and extremely organized. I would recommend her services to anyone.”
Les Edwards
Edwards Landscaping
“6 months ago we were more than 14 months behind in all of our books, including 5 different companies. In the short time that Angela has been with us, I can finally say ‘We are ahead of the game!’ She has brought some really great systems into play, including a new filing system. She has helped us understand our financial position and the importance of bookkeeping. She has adapted to our business, and we are happy she has joined our team.”
Kerry White
Huna 7 Entertainment Pty Ltd
“Extremely pleased that Angela was recommended as the best person to get me set up and running on Xero. Angela’s expertise made the entire process painless.”
Matt Hartland, Hartland Fashion Agencies Pty Ltd
“Olive Tree Bookkeeping gives our business the financial stability and confidence we need to operate and grow. Our finances are well managed and our risks proactively mitigated. Angela’s solution-driven approach makes even our more complex tasks feel achievable. Always professional and 100% committed.”
Candice Quartermain
Common Ventures Pty Ltd
“6 months ago we were more than 14 months behind in all of our books, including 5 different companies. In the short time that Angela has been with us, I can finally say ‘We are ahead of the game!’ She has brought some really great systems into play, including a new filing system. She has helped us understand our financial position and the importance of bookkeeping. She has adapted to our business, and we are happy she has joined our team.”
Kerry White Huna 7 Entertainment Pty Ltd