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Personal. Digital. International.


Personal. Digital. International.


Personal. Digital. International.

TREU-GmbH • Tax consulting • Auditing • Germany


since 1921

TREU-GMBH was founded in 1921 and is one of Germany’s oldest auditing companies. Two business partners and currently eight employees provide top-quality services.
Our aim is to offer reliable, customised support to our clients. We attach great importance to the personal trust you put in our expertise and experience. Our role is to act as “family doctor” for your company and serve as your contact for any business management and legal issues you may have.

Owing to our independent status and the personal support we provide, we can afford to be very flexible in catering to your needs. Since our employees come from various walks of life (business management, economics, law) and our client base is highly heterogeneous in terms of their branch of industry and legal form, we have a broad knowledge base and lots of experience to serve your interests.

We work completely with digital technology and use adaptive intelligent software so that we can offer our services as efficiently and cost effectively as possible. In particular, we use programs from DATEV to achieve this. In addition, we employ complex MS Excel tools and utilize ADD-INS such as Datasnipper in order to match pdf files with Excel files.

Network worldwide

TREU-GMBH is an independent accounting and tax consulting firm based in Frankfurt am Main. We closely cooperate with our partner offices of IAPA Deutschland AG, located in the major German business areas, IAPA International as well as UK 200. As the partners of the various consultancies all know each other personally we have created a communication system that guarantees optimal consultation to all our clients in their nationwide and international business activities. Via our membership with IAPA and the UK 200 group we have access to the professional expertise of more than 200 accounting firms worldwide.


We are a good mix of young, dynamic and experienced employees.


Tax, consulting, Auditing, Germany

Financial Accounting

We always book digitally, import receipts and data records with companies online from DATEV.

Payroll Accounting

We use online applications such as employee online from DATEV to make the processes as efficient as possible.
Tax, consulting, Auditing, Germany

Tax Consulting

We support you in all tax matters with highly qualified services.


As a member of the IDW (Institute for Auditors), we observe its requirements. Most of our tests are carried out digitally.


We support young companies with initial advice and with start-up issues.



We can advise and support you with regard to special sales tax issues for international purchases and sales.

TREU GmbH • Tax consulting • Auditing • Germany


We primarily cater to small- and medium-sized companies based in the larger Rhein-Main region, Germany. Moreover, we also advise private individuals, i.e. the associates in a company or managing directors of the companies using our services.

Our corporate clients have different legal forms, company structures and sizes. Aside from the conventional legal forms including private limited companies, stock corporations, sole proprietorships, general commercial partnerships, limited partnerships as well as limited partnerships with a limited liability company as general partner, we also provide advisory services to non-profit associations and foundations. Our portfolio includes groups and company spin-offs as well as holding companies belonging to foreign-based groups.

We are interested in cooperation over the long term, since the quality of our advisory services grows as we acquire additional knowledge of our client and this knowledge grows over the years of cooperation. Some of our clients have been with us for several decades already.

Our foreign clients are primarily based in the following countries:

Hong Kong

→ France
The Netherlands

Upon request, we are happy to provide you with the contact details to our reference clients.


The following sectors are particularly well represented among our clients:

IT service provider



Media technology

Mechanical engineering

Transport & logistics

Wholesale & retail

Sales & distribution companies

We are looking for colleagues to join the team.



We are looking for colleagues to join the team.


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Did you know?

EU VAT E-Commerce Package:
Distance selling as of 1.7.2021

The second stage of the Value-Added Tax E-Commerce Package, which has to be implemented in national law by all EU states by 01.07.2021, foresees the removal of all national turnover thresholds. These will be replaced by a common EU-wide turnover threshold at an amount of EUR 10,000 net.

Please do not hesitate to contact us if we have aroused your interest.

TREU GmbH • Tax consulting • Auditing • Germany

  • +++ We have been a client of Treu-GmbH for many years. In particular, we value the competence, reliability and excellent long-standing cooperation. +++                                              

    Fives-Pillard Deutschland GmbH.
  • +++ Treu-GmbH has been a competent business partner for many years. Mr. Saur is at our side at all times with uncomplicated and competent support; we place great value on the reliable and personal advice provided for our company.+++

    RTSB GmbH
  • +++ Thanks to the understanding of Treu employees about our processes, goals and internal requirements has been established an strong relationship between us. Thanks for the Great Services. +++

    Cognizant Technology Solutions GmbH
  • +++ „Their high level of expertise, as well as communication on an equal footing, are the reasons why we have placed our faith in the services of Treu GmbH for decades."+++

    TEKO Gesellschaft für Kältetechnik mbH
  • +++ „Over the many years that we have been working together with Treu (alternative: with Treu GmbH), the team has really lived up to its name: always very reliable and in close contact with its customers, while at the same time always competent!” +++

  • +++ „We value TREU GmbH as a technically competent service partner who looks after us very reliably in the operational areas of the mandate, but is also always on hand with great specialist knowledge on special topics." +++



    Lyoner Straße 44 - 48
    D-60528 Frankfurt am Main

    Managing director:

    Dipl.-Volksw. Christian Saur Auditor, Tax Consultant


    Commercial Register

    Amtsgericht Frankfurt am Main,
    72 HRB 7580

    Tax Number: 047 246 75146
    Ust.-IdNr.: DE 114222137

    Bank Details

    Deutsche Bank
    Konto: 76 306 76 00
    BLZ: 500 700 25
    IBAN: DE085007002407630676 00

    webdesign by Drela GmbH

    TREU GmbH
    Lyoner Straße 44 - 48
    D-60528 Frankfurt am Main    

    Phone: +49 69 631579-0
    Fax +49 69 6313641

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