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We always use the DATEV online software for posting digital, imported documents and data sets.


Up-to-date and orderly financial accounting with informative monthly analyses are the basis for sound business management. For companies wishing to place their accounting in the hands of professionals, we are able to offer the following services in particular:

  • Installation of an accounting system

  • Advice on the organization of accounting
  • Implementation of ongoing financial accounting with DATEV Unternehmen Online (DATEV Business Online)
  • Design of monthly / quarterly reporting systems according to individual needs
  • Installation and implementation of cost accounting
  • Transfer of management accounts in various formats via e-mail to head offices all over the world. Reporting language: English
  • Preparation of individual business analyses
  • Preparation of sales tax (VAT) advance returns
  • Regulation of payments


We use online applications such as Arbeitnehmer-Online (Employee-Online) from DATEV in order to create the most efficient processes possible

As an employer, you are obliged to calculate and pay wage and church tax and social security contributions on behalf of your employees. You can be held liable for amounts that are not paid.

In view of the necessary specialist skills required, it could make sense to outsource payroll accounting.

Finanzbuchhaltung und Gehaltsbuchhaltung

Payroll services

  • Set up of payroll systems and processing of monthly payroll calculations:
  • Gross to net pay calculations
  • Net to gross calculations
  • Preparing and filing of monthly returns for wage tax and social security
  • Preparation of annual declaration for legal accident insurance
  • Communication with tax and social security authorities
  • Advice on modification of payroll structure (test calculations)
  • Advice on incentive and stock option schemes

Processing of travel expenses

  • Checking clerical accuracy and agreement with company’s policy
  • Cross-checking travel expenses against local wage tax and social security rules
  • Processing of payments to employees

Hiring of staff

  • Drafting job descriptions and candidates’ profiles
  • Contacts to labour authorities
  • Internet research
  • Drafting and processing of advertisements
  • Pre-selection of candidates
  • Initial meetings with candidates
  • Recommendations to clients
  • Advice on tax and social security questions
  • Information on labour law, residence and work permit, green card procedures
  • +++ 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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