About Us

We provide our services to all kinds of corporations, organizations and associations. We provide services in the fields of Audit, Tax and Advisory. We perform competent services for well-known companies, organizations and associations in local and global markets. Our clients benefit from our global networking and the combined know-how of all member firms.
We are a member of Crowe since 2001:
Crowe is one of the world`s largest global network of independent accounting and advisory services firms. With more than 200 representations in 129 countries more than 35.000 employees work for Crowe Global in over 764 offices.

Crowe Frankfurt consists of four independent entities:
  • INTERTAX TREUHAND GmbH Steuerberatungsgesellschaft (tax advisory company)
  • HSA Frankfurt GmbH Wirtschaftsprüfungsgesellschaft (audit company)
  • IAR Intertax Airline Representation GmbH
  • IAT Intertax Asset Treuhand GmbH Steuerberatungsgesellschaft (tax advisory company)

Our history

  • 1968: Foundation of INTERTAX TREUHAND GmbH Steuerberatungsgesellschaft
  • 2000: Extension of the services into the field of audit
  • 2001: Joined the Crowe Horwath International network
  • 2004: Relocation to new office premises in Frankfurt “City West”, constant increase in clients and staff
  • 2005: Reorganization of INTERTAX TREUHAND GmbH Steuerberatungsgesellschaft and foundation of the independent entity HSA Frankfurt GmbH Wirtschaftsprüfungsgesellschaft
  • 2010: Foundation of IAR Intertax Airline Representation GmbH as a special service provider for air traffic tax
  • 2014: Foundation of IAT Intertax Asset Treuhand GmbH Steuerberatungsgesellschaft as a special service provider
  • 2018: Rebrand - Crowe Horwath becomes Crowe