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Key contacts
President Director: Jonathan Nainggolan
Partner: Markus Iwandi
Business Development: Nabila Risty R
Quick facts
Number of partners

7

Number of advisors

39

Network memberships

Indonesian Chamber of Commerce and Industry (Kamar Dagang dan Industri Indonesia)

Languages

Indonesian, English

Key practice areas
General corporate tax
Tax
Tax controversy
Transfer pricing
Firm overview

Ideatax distinguishes itself through deep expertise and a commitment to client satisfaction, offering a comprehensive range of tax services. With extensive experience in both tax consulting and tax authority environments, Ideatax delivers holistic solutions to complex challenges within Indonesia’s tax landscape. The firm specializes in key areas such as Compliance Risk Management, helping to mitigate risks while providing integrated strategies.

Ideatax’s services include assistance with Tax Audits, Transfer Pricing Documentation, Tax Compliance, Corporate and Individual Income Tax Returns, and Tax Due Diligence. The firm also provides expert support for SP2DK, Tax Objections, Appeals, Refunds, and Authorized Economic Operator status. With a proven track record in resolving tax disputes and addressing low compliance, Ideatax consistently delivers results.

Ideatax excels in helping multinational corporations navigate Indonesia's tax regulations, particularly in the area of foreign investment. Strong client relationships, built on trust and mutual respect, are key to Ideatax’s success, and this is complemented by a focus on talent development to ensure its team remains at the forefront of industry advancements.

Ideatax embraces technology to enhance client satisfaction. Its client portal offers real-time access to case updates and documents, while AI-powered tools streamline routine tasks, allowing experts to focus on high-value advisory services.

In addition, Ideatax is committed to diversity and inclusion, fostering an innovative and inclusive work environment. This commitment helps attract top talent, resulting in diverse perspectives and a deeper understanding of client needs.

By prioritizing these areas, Ideatax continues to deliver exceptional tax consulting services, including tax advisory, while improving efficiency, communication, and expertise for its clients.

Connect with us
Key practice areas

Tax advisory:

  • Tax consulting
  • International tax advisory

Indirect tax:

  • Customs
  • VAT

Corporate tax matters:

  • Transactions
  • Cost-sharing arrangements
  • Restructuring
  • Technology
  • Corporate taxes
  • Financial services
  • Cryptocurrency

Compliance management:

  • Technology services

Dispute resolution:

  • Dispute resolution
  • Audit defence
  • Audit support
  • Pre-litigation
  • Controversy management
  • Litigation

Transfer pricing:

  • Cross-Border Project Management
  • TP Policy Design
  • Business Restructuring
  • Economic Modelling
  • Business Model Optimisation
  • Audit Defence
  • Audit Support
  • TP Risk Management
  • IP Management
  • Cost-Sharing Arrangements
  • Dispute Resolution
  • Controversy Management
Sector expertise
  • Automotive
  • Aviation
  • Mining
  • Shipping
  • Industrials
Tel:+62811195708 Email:Contact Us Web Address:https://ideatax.id/
2026 Edition
General corporate tax
Tier 3
20 firms ranked
View full list

Tier 1

Deloitte
7 practice areas
View profile
EY
7 practice areas
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KPMG
7 practice areas
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PB Taxand
5 practice areas
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PwC
7 practice areas
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Tier 2

DDTC
5 practice areas
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GNV Consulting
5 practice areas
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Hadiputranto Hadinoto & Partners
4 practice areas
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RSM Indonesia
5 practice areas
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SF Consulting
5 practice areas
View full profile

Tier 3

Ideatax
4 practice areas
View full profile
MUC Consulting Group
4 practice areas
View full profile
Suryani Suyanto & Associates
4 practice areas
View profile
TaxPrime
4 practice areas
View profile
WTS Indonesia
4 practice areas
View profile

Tier 4

Provisio Consulting
3 practice areas
View full profile

Other notable

Assegaf Hamzah & Partners
6 practice areas
View profile
MIB
3 practice areas
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Metalaw Legal and Tax Consultant
2 practice areas
View full profile
SSP Consultant
2 practice areas
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Tax controversy
Other notable
19 firms ranked
View full list

Tier 1

Deloitte
7 practice areas
View profile
EY
7 practice areas
View profile
GNV Consulting
5 practice areas
View full profile
Hadiputranto Hadinoto & Partners
4 practice areas
View profile
KPMG
7 practice areas
View profile
PwC
7 practice areas
View profile

Tier 2

DDTC
5 practice areas
View full profile
MUC Consulting Group
4 practice areas
View full profile
PB Taxand
5 practice areas
View full profile
RSM Indonesia
5 practice areas
View profile
TaxPrime
4 practice areas
View profile

Tier 3

Provisio Consulting
3 practice areas
View full profile
SF Consulting
5 practice areas
View full profile
Suryani Suyanto & Associates
4 practice areas
View profile

Other notable

Assegaf Hamzah & Partners
6 practice areas
View profile
Azwar Hadisupani Rum & Partners
3 practice areas
View profile
Ideatax
4 practice areas
View full profile
Metalaw Legal and Tax Consultant
2 practice areas
View full profile
WTS Indonesia
4 practice areas
View profile
Transfer pricing
Tier 3
19 firms ranked
View full list

Tier 1

DDTC
5 practice areas
View full profile
Deloitte
7 practice areas
View profile
EY
7 practice areas
View profile
KPMG
7 practice areas
View profile
PwC
7 practice areas
View profile

Tier 2

GNV Consulting
5 practice areas
View full profile
MUC Consulting Group
4 practice areas
View full profile
PB Taxand
5 practice areas
View full profile
RSM Indonesia
5 practice areas
View profile
TaxPrime
4 practice areas
View profile

Tier 3

Hadiputranto Hadinoto & Partners
4 practice areas
View profile
Ideatax
4 practice areas
View full profile
Pro Visioner Konsultindo
3 practice areas
View full profile
SF Consulting
5 practice areas
View full profile
WTS Indonesia
4 practice areas
View profile

Other notable

Assegaf Hamzah & Partners
6 practice areas
View profile
MIB
3 practice areas
View profile
Prime Consult
3 practice areas
View profile
Suryani Suyanto & Associates
4 practice areas
View profile
Overview

Ideatax is a tax consulting firm based in Indonesia, with a team of over 50 professionals, including 5 partners and 1 senior advisor. The firm specializes in tax audit and tax refund assistance, transfer pricing documentation, and tax compliance services. It has industry expertise in the manufacturing and mining sectors. Jonathan Nainggolan and Markus Iwandi are the firm’s key partners. 

During the research period, the team supported various clients with tax refund matters by liaising with the tax authorities, assisting in the submission of required documentation during audits, and providing related advisory services. 

Client feedback 
“IDEA TAX is helpful, always give a solution. They very helping to solve our problem” 

Linked Reviews
Tax

Ideatax is a tax consulting firm providing tax services such as advisory, tax dispute, international tax, transfer pricing and M&A. It has strengths in sectors including automotive, insurance and e-commerce. Partner Markus Iwandi is one of the key practitioners in the team. He specialises in tax advisory, tax disputes, international tax and tax compliance. 

The team, led by Jonathan Nainggolan, recently acted as a tax consultant for PT Heyokha Research Indonesia. The work included providing tax consultation and assistance in the preparation and submission of the client’s corporate income tax return. 

Sponsored

Sponsored

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World Tax Sponsored

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