Expert Accounting Tailored for You

We're here to provide expert financial guidance while managing all of your accounting needs, ensuring clarity, compliance, and growth in your financial understanding

Services We Provide

Professional Bookkeeping

Recording day-to-day transactions and ensuring you maintain current records to make wise decisions.

Tax Planning & Advisory

The best strategies for seeking optimal tax advantages aren't easy to find. Our experts will assist you in seeking the best possible outcomes with regards to tax minimisation and asset protection.

Industries

  • Medical & Health
  • Construction
  • IT
  • Finance & Brokerage
  • Not for Profit Organisations
  • Automotive
  • Retail
  • Hospitality & Food
  • Real Estate
  • Consultancy

Compliance

  • Tax
  • Accounting
  • ASIC Corporate Secretarial
  • SMSF Tax / Financial Accounts / Audit
  • Payroll & Super
  • BAS / IAS / PAYG

Our Story

Demir & Co was established in 2001 with its practice located in Glenroy. Our senior accountant, Sinan Demir, has over 30 years of experience within the accounting field and is a qualified FCPA. He has a wealth of knowledge and practical experience in tax, accounting and in a variety of areas within the business sector.

Demir & Co demands a high standard from all its staff who are either fully qualified or acquiring their CPA / CA registration.

Our success is drawn from our commitment to professional development, the foresight to utilise the latest technologies and procedures, our willingness to listen to our client’s needs and to act on feedback from clients and staff members.

A simple process to access the services you need

Whether you're starting a new business or considering switching to a new accountant or tax agent, our onboarding process is simple.

01.

Get in Touch

02.

Meet

03.

Sign On

5.0
Based on 36 reviews
powered by Google
James Yousif
11:21 21 Aug 25
Sinan has been my accountant for almost 20 years. From the days of when I was a PAYG employee to now being a company/trust business owner running my own finance brokerage firm. I wouldn’t have stayed with Sinan from Demir & Co, if I didn’t trust in his knowledge and education. He sits down and explains everything to me making sure I understand everything in clear black and white, gaining my full trust and understanding. Sinan, it’s always a pleasure dealing with you throughout the years. Thank you!
Alex Kasap
07:46 29 Jul 25
I've had Sinan as my accountant for over a decade. Sinan's very good at what he does, he's reliable, easy to work with, a professional with strong knowledge on all aspects of current taxation laws. I trust Sinan completely with my finances and couldn't recommend him more highly.
Jack Prow
06:10 15 Nov 24
If you're a self employed business owner looking for reliable, intelligent and HELPFUL accountants who you can feel safe with on your journey, Demir & Co should be who you partner with.

They always go above and beyond to make sure I'm prepared for everything, and also educate me along the way so I also understand how everything works.

Absolute gentlemen!
John Perrigo
23:06 24 Oct 24
Excellent service! Fast, efficient and friendly, if you’re looking for an accountant this is the place.
Umer
21:14 17 Oct 24
I recently visited Demir & Co for the first time and had an excellent experience with Sinan. He was professional, thorough, and took the time to explain everything clearly, answering all of my questions with patience. I was referred by a colleague who has been using their services for a long time, and I now understand why they’ve stayed loyal. I am very happy with the service I received and will highly recommend Sinan / Demir & Co to anyone looking for reliable and knowledgeable tax accountant.
christian cale
08:33 07 Oct 24
Had a meeting with Sinan from Demir & Co to process/complete my tax return. He made it very easy and smooth and was happy to answer any questions i had. I wont be going anywhere else to process my returns from now on. Highly recommended.
Eylem Kepenci
23:20 26 Aug 24
I had my first tax return appointment with Sinan, and he explained everything very clearly and professionally. Highly recommended.
Bree Littlehales
00:01 17 Jul 24
Sinan and the team have been looking after us at tax time for over 15 years now. Their service is excellent, we highly recommend them
Atakan ATAKUL
13:09 30 Apr 24
Exceptional Service, Especially from Sinan!

I can't recommend this accounting team enough! They're incredibly helpful as a team, but I want to give a special shoutout to Sinan. His expertise and dedication are unmatched. Sinan goes above and beyond to provide important information tailored to your needs. Thanks to him, navigating financial matters has been a breeze. If you're looking for top-notch service, look no further than this team, especially Sinan
Keldo Gliana
04:10 23 Feb 24
Exceptional service from Sinan and the team at Demir & Co! Their professionalism and business acumen stand out in every interaction. Always responsive and highly efficient, they’ve made complex accounting processes seamless and straightforward for us. Highly recommend their services for anyone in need of expert accounting assistance.
Area of Service
  • Tax return
  • Tax Planning
  • GST
  • Payroll
  • Superannuation
  • Workcover
  • Auditing & Benchmarking
  • Business advice
  • Bookkeeping
  • Home & Business loan assistance
  • Corporate Secretarial including company, trust and super fund formations
© 2025 Demir & Co. All rights reserved.