Trusted Business Tax Accountants & Fractional CFOs
Book a MeetingPartner with one of the leading accounting firms in Sydney for strategic advice from fractional CFOs and specialist R&D accountants, focused on optimising tax, supporting sustainable growth, and providing financial peace of mind.
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At Quantum House, our experienced team of Sydney accountants and advisers delivers personalised accounting, tax, and fractional CFO solutions designed specifically for SMEs and individuals with complex financial needs.
As one of the leading business tax accountants in Sydney, Quantum House specialises in corporate tax accounting, helping businesses optimise tax outcomes, achieve sustainable growth, and benefit from the ATO tax incentive programs. Our experienced team of company tax accountants provides proactive tax planning, meticulous compliance management, and strategic financial reviews designed around your unique and ambitious business goals.
Our senior Quantum accountants bring years of experience from Australia’s largest firms. This deep expertise, paired with our commitment to personalised service, ensures you receive premium small business accounting advice at highly competitive rates, making our small business accounting services stand out from the rest.
We take a proactive approach to managing your finances by anticipating your needs rather than just reacting to them. By identifying opportunities early through comprehensive tax planning, compliance management and detailed financial reviews, we resolve potential issues before they become costly problems.
Collaboration is central to our way of working. By partnering closely with your financial, legal, and advisory teams, we create holistic strategies that deliver measurable results. Our aim is always to minimise your tax liabilities, optimise your business structure, enhance your cash flow and profitability, and confidently manage regulatory requirements.
Quantum House is dedicated to your financial clarity, growth, and peace of mind. If you’re seeking a small business tax accountant in Sydney who prioritises your business success and is always available when you need support, contact our team today.
Our Professional Services
Explore our comprehensive suite of professional services tailored to meet your financial needs
Business Setup & Closing
Business Setup & Shutdown requires comprehensive advice and implementation
International Trade & Transactions Support
Expert services to secure the successful international deals
What Our Clients Say

I have been very lucky to encounter the services of this team. They are honest, reliable & efficient. Although my business is small, my tax affairs with the ATO were in a mess & I felt rather embarrassed – however, I was treated with the utmost respect, caring & attentiveness. The mess was cleared up & things resolved to a much better state and in a much faster timeframe than I could ever have imagined possible! The service I received made me feel that I was a person rather than just a client. Mr Ben Youn in particular is a rare breed of men with a sense of honour, dignity & compassion. I would highly recommend the services from Ben’s team.
A client from VIC

The ATO contacted us regarding an issue they had identified with our tax returns from nearly four years before. It was an extremely stressful time for us as it involved international and investment tax queries that we simply could not understand and the ATO was adamant that we owed a very large sum of money that we simply did not have available. When we contacted Australian Tax Experts and spoke to Ben and his team we immediately felt reassured that we and our tax issue were in very capable hands. The people at Australian Tax Experts are extremely knowledgeable and dedicated to achieving the best possible outcomes for clients, which is what they did for us. They rectified everything with the ATO and we ended up owing a lot less than what was originally being sought after.
A client from regional NSW

Ben is a top-notch tax expert, and I am not saying it because he is well-knowledgeable on foreign income. His customer service and professionalism was excellent especially when the deadline for submitting my income tax returns was near. He replied to all my queries whether it be minor or major, with patience and asked the right questions which were necessary for the paperwork. Also impressed with the way he organised the contract, and forms. He managed to get everything done in one week, which was amazing if you think about it – he exceeded my expectations. He also followed up over email, about the status of the income tax returns. In short, I highly recommend him if you ever get stuck/lost while trying to lodge income tax return especially if your income comes from another country than Australia and the deadline looms near. Thumbs up to Ben!
A tax client from Sydney

Extremely pleased with all aspects of my contact and service received from this team. At all times I have found them to be very professional, astoundingly prompt, reliable and honest. Most importantly I found the work conducted for me excellent – second to none. They are very precise, proactive and efficient. I would have no hesitation in recommending to anyone. In addition to this, they are very genuine, pleasant and polite people. I will be continuing to utilise their services long into the future.