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Key contacts
CEO & Managing Partner: Christoph Zimmel
Quick facts
# Partners

23

# Total number of lawyers

300

# Practitioners (worldwide)

80,000

Key practice areas
General corporate tax
Indirect tax
Real estate
Tax
Tax controversy
Transfer pricing
Social media feeds
Firm overview

Grant Thornton is one of Austria’s leading providers of Tax, Audit and Advisory services. As part of one of the world's largest professional services networks with member firms in 150 countries, the firm supports organisations of all sizes and industries to navigate complexity and seize opportunities.

Tax

Grant Thornton Austria provides tailored tax advisory services to help businesses and individuals navigate complex national and international tax regulations. Services cover corporate tax, international tax, transfer pricing, M&A, tax compliance, and private wealth, combining technical expertise with personal advice and the strength of an internationally connected network.

Audit

Grant Thornton Austria provides independent audit and assurance services that help strengthen trust in financial and business information, giving stakeholders a reliable basis for decision-making. The firm combines audit expertise with advanced technology and industry knowledge to deliver efficient, high-quality audits, while also supporting clients with accounting-related advisory and assurance matters.

Advisory

Grant Thornton Austria delivers strategic advisory services that support companies through transactions, transformations and complex business challenges. Its multidisciplinary teams advise on areas such as transaction support, valuation, restructuring and many more, providing tailored solutions that help organisations achieve sustainable growth and informed decision-making.

Key practice areas

  • Business model optimisation
  • Cross-border project management
  • Policy design
  • Technology services
  • Corporate taxes
  • Cryptocurrency
  • Financial services
  • M&A
  • Restructuring
  • Technology
  • Transactions
  • Audit defence
  • Audit support
  • Controversy management
  • Litigation
  • Customs
  • VAT
  • International tax advisory
  • Tax consulting
  • Business restructuring
  • Cost-sharing arrangements
  • International tax planning
  • IP management
  • TP policy design
  • TP risk management
Other office

WIENER NEUSTADT OFFICE

Domplatz 16
Wiener Neustadt 2700
Austria

T: +43 2622 64088
E: wienerneustadt@at.gt.com
W: https://www.grantthornton.at/en/officesaustria/wiener-neustadt/

KLAGENFURT OFFICE

August-Jaksch-Straße 2
Klagenfurt am Wörthersee 9020
Austria

T: +43 664 882 363 56
E: klagenfurt@at.gt.com
W: https://www.grantthornton.at/en/officesaustria/klagenfurt/

Address:
Gertrude-Fröhlich-Sandner-Straße 1/Top 13
1100 Wien
Austria
Tel:+43 1 5054313 Email:Contact Us Web Address:https://www.grantthornton.at/en/
2026 Edition
General corporate tax
Tier 2
23 firms ranked
View full list

Tier 1

Binder Grösswang
5 practice areas
View profile
Deloitte Tax
6 practice areas
View full profile
Ernst & Young
5 practice areas
View profile
KPMG Austria
3 practice areas
View profile
LeitnerLeitner
5 practice areas
View full profile
PwC
7 practice areas
View profile
TPA Steuerberatung
7 practice areas
View profile
bpv Hügel
6 practice areas
View profile

Tier 2

CERHA HEMPEL
4 practice areas
View profile
Dorda
3 practice areas
View profile
Freshfields
5 practice areas
View profile
Grant Thornton Austria
6 practice areas
View full profile
ICON
5 practice areas
View full profile
Schönherr
4 practice areas
View profile
Wolf Theiss
4 practice areas
View profile

Tier 3

BDO Austria
2 practice areas
View profile
Kinstellar
4 practice areas
View profile
Schindler Attorneys
5 practice areas
View profile

Tier 4

Aigner Buzanich
3 practice areas
View profile
Althuber Spornberger & Partner
3 practice areas
View profile
DLA Piper Weiss-Tessbach
2 practice areas
View profile
Diwok Hermann Petsche
2 practice areas
View profile
PHH Tax
2 practice areas
View profile
Indirect tax
Tier 2
11 firms ranked
View full list

Tier 1

Deloitte Tax
6 practice areas
View full profile
Ernst & Young
5 practice areas
View profile
LeitnerLeitner
5 practice areas
View full profile
TPA Steuerberatung
7 practice areas
View profile

Tier 2

Binder Grösswang
5 practice areas
View profile
Grant Thornton Austria
6 practice areas
View full profile
ICON
5 practice areas
View full profile
Schindler Attorneys
5 practice areas
View profile

Tier 3

Kinstellar
4 practice areas
View profile
bpv Hügel
6 practice areas
View profile

Other notable

CERHA HEMPEL
4 practice areas
View profile
Real estate
Tier 2
6 firms ranked
View full list

Tier 1

Deloitte Tax
6 practice areas
View full profile
Ernst & Young
5 practice areas
View profile

Tier 2

Grant Thornton Austria
6 practice areas
View full profile
Schönherr
4 practice areas
View profile
TPA Steuerberatung
7 practice areas
View profile
bpv Hügel
6 practice areas
View profile
Tax controversy
Tier 2
14 firms ranked
View full list

Tier 1

Althuber Spornberger & Partner
3 practice areas
View profile
Binder Grösswang
5 practice areas
View profile
Deloitte Tax
6 practice areas
View full profile
Freshfields
5 practice areas
View profile
LeitnerLeitner
5 practice areas
View full profile
Schönherr
4 practice areas
View profile
bpv Hügel
6 practice areas
View profile

Tier 2

CERHA HEMPEL
4 practice areas
View profile
Grant Thornton Austria
6 practice areas
View full profile
Schindler Attorneys
5 practice areas
View profile
Wolf Theiss
4 practice areas
View profile

Tier 3

Aigner Buzanich
3 practice areas
View profile
ICON
5 practice areas
View full profile
Kinstellar
4 practice areas
View profile
Transfer pricing
Tier 1
14 firms ranked
View full list

Tier 1

Deloitte Tax
6 practice areas
View full profile
Ernst & Young
5 practice areas
View profile
Grant Thornton Austria
6 practice areas
View full profile
KPMG Austria
3 practice areas
View profile
PwC
7 practice areas
View profile

Tier 2

Freshfields
5 practice areas
View profile
ICON
5 practice areas
View full profile
LeitnerLeitner
5 practice areas
View full profile
TPA Steuerberatung
7 practice areas
View profile
bpv Hügel
6 practice areas
View profile

Tier 3

Kinstellar
4 practice areas
View profile
Wolf Theiss
4 practice areas
View profile

Tier 4

Binder Grösswang
5 practice areas
View profile

Other notable

Schindler Attorneys
5 practice areas
View profile
Overview

Grant Thornton Austria’s tax team, led by Raphael Holzinger and Werner Leiter, comprises over 150 professionals advising a wide range of clients—from sole proprietors to listed companies. With 2024 tax revenues exceeding €17.5 million, it ranks among Austria’s top tax teams. The firm offers partner-led, personalised tax advisory and compliance services, leveraging its international network and cross-border collaboration to support clients expanding globally. 

During the research period, the firm provided buy-side structuring advice and post-deal integration support for the acquisition of a large software provider, navigating multiple complex restructuring steps. In addition, the team assisted a legal tech client for cross-country tax and transfer pricing restructuring, recognising the firm’s reputation as a leading advisor in complex international tax matters. 

Client Feedback 

"Timely, critical, and practical advice—tailored to your business needs." 

Awards
It was another banner year for Deloitte, which picked up more awards than any other firm at a gala ceremony held at The Londoner in Leicester Square
Grant Thornton Advisors’ latest acquisition has produced the fifth-largest US advisory firm by revenue, but there’s still a clear gulf between it and the big four
The private equity-backed deal hands Grant Thornton immediate and impressive US scale, but World Tax data suggests the firm still has work to do to gain recognition
Grant Thornton advanced plans to integrate its Australian firm into its US arm, as tax developments spanned law firm hires, aviation levies and digital services taxes
Booming APA statistics reflect the growing credibility of India’s TP framework and the country’s shift toward a tax certainty approach, ITR has heard
New reforms represent the most seismic shift in Canadian TP legislation since its enactment and a clear inflection point for MNEs, ITR has heard
Partners are divided on Italy vs PDM D’s analytical depth, evidentiary standards, and what the judgment signals for future intra-group financing cases
The UK firm made the appointments as it seeks to recruit 160 new partners over the next two years
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