About Us

Kostkas is a general practice accounting firm based in Darwin Northern Territory.

The firm was founded in 1957 by Jaromir (Jerry) Kostka, a gifted Czech migrant who spoke 8 languages. Since 1974 Kostkas has operated from 10 Malabar Court Larrakeyah Darwin. We are independently owned. Professionally we are members of both CPA Australia and the Taxation Institute of Australia. Our two Directors are both registered tax agents.

Our Clients

Kostkas clients are diverse. With 60 years experience Kostkas can assist all taxpayers from wage and salary earners & subcontractors through to complex business structures. Kostkas are here for all tax payers great and small.
We have experience in Building & Construction; Professional Services; Retail; Primary Production and Property Development.
Our goal is to maintain a long term professional relationship with you, no matter where in this world life moves you.

Our Model

We model Kostkas on your old fashioned GP – consistent and available, with strong general knowledge. Like your Family GP we know sometimes you or your business should seek specialist advice.
If you ever require specialist advice we have a network of trusted specialists that we can refer you to. As your trusted advisor we manage that process to ensure you continue to get sound advice. We do not outsource work overseas.

Who We Are

Our staff regularly undertake continuing professional development to ensure we are across the latest tax and business issues affecting you.

David Pemberton




David holds a Bachelor of Business from the University of Southern Queensland with a double major in Accounting and Information Systems. He is a Certified Practising Accountant and holds a Public Practising Certificate with CPA Australia. He is also an Associate Member of the Taxation Institute.

His commercial experience covers Primary Production; Construction & general contracting as well as a wide variety of Service Industries. He is very interested in the impact of the Digital Age and how small and medium size businesses might adapt and profit.

Kyriacos Savvas




Kyriacos joined Kostkas while studying at Charles Darwin University. After completing his Bachelor of Commerce majoring in Accounting he focussed his career by successfully completing studies with the Taxation Institute to earn the designation Chartered Tax Adviser. As recognition of his commitment to Kostkas clients he took equity in the firm in 2018.

Kyriacos is a third generation Territorian. In his spare time he enjoys sports, fishing & hunting.