Constantinus Pratama Rettob, S.E., M.Ak., CTA

Director of Tax


Constan has 12 years of experience in taxation, providing compliance, auditing, and planning corporate and individual taxes. He also has four years of experience in tax appeals within diverse industries. As a tax practitioner, he has been certified as a Tax Attorney.

Constan’s broad tax law practice includes corporate tax planning, tax compliance, tax auditing, mergers and acquisitions, and tax dispute resolution.

Before establishing CSI Consultant, Constan was a tax partner at a national tax firm in Jakarta and a tax accountant at PT Indofood Asahi.

Constan holds his Tax Consultant Certification from the Indonesia Tax Consultant Association (IKPI). He obtained his bachelor’s and master’s degrees in accounting from the University of Indonesia. Constan is currently studying for a law degree at the Trisakti University.

Practice Area

Tax Advice
Tax Review
Tax Dispute Resolution: Audits, Objections, Appeals to the Tax Court, and Judicial Review Requests to the Supreme Court
Tax Compliance
Tax Planning and Audit
Financial Accounting


Bachelor’s in economics from the University of Indonesia (UI), 2009-2014.
Master of Accounting from the University of Indonesia (UI), 2021-2023.
Bachelor’s in law from Trisakti University, 2023-present.

Experience Highlight

  • Successfully assisted a prominent Oil and Gas EPCI Contractor company in the restitution of Value Added Tax on Goods and Services.
  • Successfully assisted one of Indonesia’s luxury hotel companies in the restitution of Value Added Tax on Goods and Services.
  • Successfully represented an oil and gas equipment distributor company in a legal objection regarding Value Added Tax on Goods and Services.


Tax Attorney License, Issued by Indonesian Tax Courts.
A profession in Tax Auditor, University of Indonesia, 2021.
Tax Consultant Certification, Indonesia Tax Consultant Association (IKPI).

Memberships and Affiliations

Member of Indonesia Tax Consultant Association (IKPI).
Member of the Indonesian Institute of Accountants (IAI).
Member of Licensed Tax Attorney from Secretariat of the Tax Court, Ministry of Finance Indonesia (SETPP Kemenkeu).