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We Take Care of Your Accounting Bookkeeping and Tax Needs.

Better ways to

handle accounting.

How Can We Help?

Personal Income Tax Returns

Companies, Trusts, Partnerships & SMSF's

Bookkeeping Advice and Assistance

Small Business Advice

Our client roster for the 2024 financial year is currently at capacity and we are not taking on any new clients. We apologise for any inconvenience this may cause and encourage you to check back with us next year for availability.

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What Our Customers Are Saying

Daryl Northey

★ ★ ★ ★ ★

In the last few year's i changed my accountant to Belair Tax and couldn't be happier. They have helped me with all my questions on everything to do with my tax over the last couple of years and even found items unclaimed from my previous accountant.

Nancy Dunn

★ ★ ★ ★ ★

I am so pleased to have Belair Tax to be my accountant. They are easily accessible, trustworthy and the willingness to give advice when needed. I am very thankful and grateful for their service.

Greg Trew

★ ★ ★ ★ ★

We have had Ros complete our tax papers for approximately 20 years now and have found her to be very thorough, competent and a pleasure to deal with. Our adult children also deal with Ros as well. Thanks Ros!!

Beth Knight

★ ★ ★ ★ ★

Ros O’Brien at Belair Tax has been our business and personal taxation accountant for many years. Ros is an exceptional accountant, an expert in her field, professional, has great attention to detail and goes above and beyond in helping our business achieve its financial goals. I have no hesitation in recommending Ros at Belair Tax.

Worked With Us Before?

★ ★ ★ ★ ★

Tax Deductions

About us

Ros O'Brien has been providing taxation, accounting and bookkeeping services to the Mundaring area since 2001. It is our aim at Belair Tax to provide you with unparalleled personalised service to a broad range of clients across the Mundaring and Eastern Hills area. As your accountant, Ros is here to ensure that all of your financial decisions are made carefully, with all relevant information and with your best interests in mind. Ros is always ready and able to help guide your business on its path to success.

Useful Information

Belair Tax has been operating from Belair House in Mundaring since 2002. Recently we have transitioned to an online office and have set up a small meeting pod in central Mundaring. Face to face meetings with Ros can now be arranged at your business, via Skype or Zoom or at our meeting pod at Suite 9 Mundaring Medical Centre, 5 Nichol Street Mundaring (behind the optometrist). Alternatively you can speak to Ros on the phone. All current appointments you have made with Ros for the coming months still remain the same - we will contact you a few days before your appointment to confirm the meeting format (as above) of your choice. Our contact details are still the same - you can call the office number 9295 0807 or email us at


  • (08) 9295 0807

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