
About us
Since its inception in 2012 from a modest office on Cavill Avenue, Surfers Paradise, Koste has consistently been at the forefront of innovation in the tax depreciation sector. Pioneering the adoption of Virtual Site Inspections, we set a new industry standard.
We were also the first to introduce fixed price structures for residential reports, ensuring transparency and trust. Furthermore, our trailblazing spirit led to the creation of specialist tax depreciation software, now utilized by hundreds of partners to produce white-label reports. With over 40,000 reports for clients across Australia, our growth is a testament to our unparalleled expertise and service. Founded by Mark Kilroy, a renowned expert in the field, Koste boasts a robust team of Quantity Surveyors nationwide. Our commitment to professionalism and results, combined with our innovative strides, solidifies Koste as the premier choice for tax depreciation needs.

Dear valued clients and partners
At Koste, our commitment goes beyond just providing a service; it’s about delivering excellence.
With every report we prepare, our promise is to meticulously ensure that you claim every deduction you’re entitled to, leveraging the latest tax legislation. Our journey in this field has been marked by a relentless pursuit of expertise and a genuine care for our clients. As the founder, I take immense pride in our team’s dedication and the trust you place in us. Rest assured, with Koste, you’re not just choosing a service provider, but a partner who truly champions your financial interests.
Warm regards, Mark Kilroy
Our Journey
Starting in 2012, Koste set out from Brisbane with a vision to reshape tax depreciation in Australia.
Our growth was swift, expanding to major cities by 2016 and strategically acquiring KC Partnership in 2017. With the introduction of EDepreciation in 2018 and our innovative Capal software in 2020, we solidified our commitment to cutting-edge solutions. The challenges of COVID-19 spurred us to further invest in technology, ensuring we not only met but elevated industry standards. Today, Koste stands as a beacon of innovation, resilience, and unwavering dedication to our clients.
Meet our Directors

Mark Kilroy is a seasoned Chartered Quantity Surveyor and the visionary CEO and Founder of the Koste Group.
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Claire is one of the founding partners of Koste Group. With a background in Property and Marketing,
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Sean is regarded as one of Australia’s leading specialists in Tax Depreciation, with over two decades
Read MoreValues & Culture
Expertise
At Koste, we pride ourselves on housing the industry’s finest. Our team embodies the pinnacle of knowledge and skill, ensuring that our clients receive unparalleled advice and service in the realm of tax depreciation.
Passion
Beyond professionalism, our team is driven by a genuine fervor for what we do. This passion is evident in every project, ensuring each client feels valued and understood.
Client Focus
Our clients are at the heart of everything we do. We prioritise their needs, ensuring tailored solutions and a commitment to their financial success.
Unity
Collaboration and cohesion define our approach. At Koste, we believe in harnessing our collective expertise, ensuring that challenges are met head-on and solutions exceed expectations.

Work with us
Koste is committed to creating a diverse workplace environment and is proud to be an equal opportunity employer.
We employ qualified Quantity Surveyors to prepare the Tax Depreciation Schedules and provide in-house on-going professional training to our staff.
Thinking of starting a career in the Construction and Taxation industry? There are exciting opportunities to join our team at Koste as a Quantity Surveyor or Business Affiliate. Both full-time and part-time positions are currently available.
Internships
Working closely with The University of Queensland (UQ), Bond University, and The Queensland University of Technology (QUT), Koste provides a 3-month internship program at our Gold Coast headquarters. Interns will gain industry work experience and put theory into practice during their internship.

Become an
Outsource Partner
As a Koste outsource partner, you will be able to receive all the support you need to provide your clients with tax depreciation reports. It includes free software that you can use to generate reports for your clients, marketing tool kits, and monthly blog articles. We are here to grow your business with you and build a long-term partnership. As a long-term Koste business partner, we aim to help you grow your business together.

Our Contributions to Charity
Koste Tax Depreciation has always valued the opportunity to give back to the community. We care about our society and try our best to invest in our community whenever we can. Giving back to society strengthens our ties to the local community and our bond with Australia and the rest of the world.
We at Koste would like to express our gratitude to all of our loyal clients who have trusted us to help them raise thousands for various charities over the years. Additionally, Koste encourages individuals to realise their full potential by starting their own businesses, which we support.

Kiva
Kiva is a loan platform that helps more than 1.7 billion people around the world who cannot get bank financing to start a business. Using Kiva’s services, students can pay for their education, and female entrepreneurs can start their businesses! In addition, farmers are able to invest in equipment, and families can afford emergency care whenever needed.
In collaboration with Kiva, Koste has made investments in start-ups in need of financial support. Many of these companies have been in the food, education, and agricultural sectors for many years. Our initial investment has helped individual small business owners located from the Philippines to Fiji. We have also helped entrepreneurs set up a business and provide for their families, which we are all very proud of.
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We’d love to hear from you
Let us know how your experience was and if there is anything
we can do better to help you.