Our Professional,

CITASCO is a tax consulting firm dedicated to provide innovative and best solutions for clients’ tax problems and business needs. We offer a broad range of tax services performed by our highly skilled and experienced professionals that strive to exceed all of our clients’ expectation.

Our Vision

To become a premier tax consulting firm in Indonesia.

Our Mission

To continuously provide excellent tax services to clients.

Our Leader

Dr. Ruston Tambunan, Ak, CA., S.H., M.Si, M.Int.Tax
(Managing Partner / Founder)

Ruston_new Seven years served as an auditor in the government institution of Financial and Development Supervisory Body (BPKP), including four years as a Tax Auditor in Charge at a joint tax auditor team with Directorate General of Tax (DJP). In the last seven years, he worked at PT. Truba Jurong Engineering, one of the leading construction companies in Indonesia and held the previous position as a Vice President of Finance, Accounting, and Tax.

He is a registered state accountant who graduated from State College of Accountancy (STAN). He also holds a Master of Science in Tax Administration and Policy from the University of Indonesia (UI) and Master of International Taxation from The University of Sydney (USyd), Australia. Also, he awarded his Doctor of Law from the University of Brawijaya. He is a registered Advocate at PERADI.

He has been a part-time lecturer at the University of Indonesia and Prasetiya Mulya Business School Jakarta for several years. He mostly teaches Corporate Income Tax, Tax Management, and International Tax subjects. He writes many articles on taxation published in national newspapers.

Currently, he is a Vice President of the Indonesian Tax Consultants Association (ITCA) and a member of the Indonesian Fiscal Association (IFA).

He has a National "C" Certificate in Taxation (Brevet C) and an official license for a tax consultant from the Minister of Finance. Also, he is a Registered Tax Attorney at the Indonesian Tax Court.

Tax Consultation



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Exchange Rates

Currency Exchange Rate *
EUR 17317.25
USD 14768
GBP 19110.68
AUD 10511.27
SGD 10870.01
* Rupiah

Effective Date :
21.10.2020 - 27.10.2020

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