Treurag AG

What Treurag AG does

Treurag AG is a regional German tax advisory and audit firm headquartered in Mainz, Rheinland-Pfalz, operating through a dual-entity structure that separates regulated tax advisory (TREURAG AG Steuerberatungsgesellschaft, HRB 1665) from statutory audit services (TREURAG GmbH Wirtschaftsprüfungsgesellschaft, HRB 52892). The firm serves three customer segments: private individuals seeking personal tax filing and advisory support, commercial businesses requiring annual financial statements, bookkeeping, payroll, and tax compliance, and freelance professionals needing specialized self-employment tax and accounting services. Its service portfolio comprises six modules: Steuerberatung (tax advisory), Jahresabschluss (annual financial statements), Finanzbuchhaltung (financial accounting), Lohn- und Gehaltsabrechnung (payroll), Wirtschaftsprüfung (statutory audit), and Betriebswirtschaftliche Beratung (business consulting), delivered through a partner-led engagement model.

The firm is led by a management board (Vorstand) of Gerhard Heinrich and Ralf Ostermann, with Prof. Dr. Martin Leo Heinrich chairing the supervisory board (Aufsichtsrat). The team of approximately 7 employees includes multiple credentialed Steuerberater and a Wirtschaftsprüfer, supported by academically qualified staff (Diplom, M.Sc.). The practice is built on traditional professional services delivery — personal consultations, phone, and email — with no proprietary technology platform, digital distribution channel, or AI/ML capabilities disclosed. Distribution is entirely regional, focused on the Mainz area and the broader Rheinland-Pfalz market.

The business model is a traditional fee-for-service professional services model: engagements are quote-based, scope-driven, and rely on partner-led client relationships rather than marketing or intermediated sales channels. The firm holds no patents, has no disclosed external funding, and is owned and controlled by its managing partners. With no subsidiaries beyond the wholly-owned auditing GmbH, no M&A history, and no disclosed revenue or headcount growth, Treurag AG functions as a stable, independent Mittelstand advisory practice rather than a high-growth or venture-backed entity.

Name

Treurag AG

Legal name

TREURAG Aktiengesellschaft

Website

https://treurag.de

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Treurag AG is a Mainz-based German tax advisory and audit firm operating through TREURAG AG (tax) and TREURAG GmbH (audit), serving private individuals, commercial businesses, and freelance professionals in the Rheinland-Pfalz region with traditional professional services.

Ownership category

akta.pro rank

Product category

Tax Advisory & Audit Services

NAICS

Administrative Management and General Management Consulting Services (541611), Other Scientific and Technical Consulting Services (54169)

SIC

Services-Management Consulting Services (8742), Services-Management Services (8741)

akta.pro primary industry

Tax Operations Support (Indirect Tax, Withholding, Compliance Admin) (BPAAAGAI)

akta.pro secondary industry

General Ledger & Close (Journal Entries, Month-End Close, Reconciliations) (BPAAAGAC)

Keywords

• Tax advisory services
• Audit services
• Financial accounting
• Payroll processing
• Business consulting

Headquarters

HQ city

Mainz

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Distribution channels1 record

Marketing channels1 record

Core offering

Treurag AG is a Mainz-based professional services firm operating through a dual-entity structure—TREURAG AG Steuerberatungsgesellschaft (tax advisory) and TREURAG GmbH Wirtschaftsprüfungsgesellschaft (auditing). It delivers six core service modules: tax advisory, annual financial statements, financial accounting, payroll processing, statutory auditing, and business consulting to private individuals, commercial businesses, and freelance professionals.

Product overview

Treurag AG operates as a dual-entity structure comprising TREURAG AG Steuerberatungsgesellschaft (tax consulting company) and TREURAG GmbH Wirtschaftsprüfungsgesellschaft (auditing company), offering integrated professional services. The service portfolio centers on six core modules: Steuerberatung (tax advisory), Jahresabschluss (annual financial statements), Finanzbuchhaltung (financial accounting), Lohn- und Gehaltsabrechnung (payroll), Wirtschaftsprüfung (auditing), and Betriebswirtschaftliche Beratung (business advisory). Together, these divisions provide comprehensive tax, audit, and business consulting services to private individuals, commercial businesses, and freelance professionals in the Mainz region.

Differentiator

Problem solved

Functional benefit

Products and services

• Steuerberatung (Tax Advisory)

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Recent moves3 records

Expansion highlights1 record

Direct peers

• Stotax Group: Network of German Steuerberater and Wirtschaftsprüfer offering tax advisory, audit, and business consulting to SME clients. Similar to Treurag in service scope and Mittelstand orientation, structured as a federation of local firms rather than a single entity.
• CURACON: German mid-market tax, audit and corporate consulting firm, focused on the Mittelstand segment and regulated industries (e.g., healthcare, social). Comparable to Treurag in target client base and service portfolio, but at materially larger scale with multiple offices.
• Ecovis: International tax, audit, legal and management-consulting network with significant Mittelstand focus in Germany. Comparable to Treurag because it also bundles tax advisory, audit, and business consulting for SMEs, though via a network model across many geographies.
• ETL Gruppe: Germany's largest network of mid-market Steuerberater and Wirtschaftsprüfer, including tax advisory, audit, payroll, and business consulting. Directly comparable to Treurag in service mix, but operates as a cooperative-style franchise network aggregating many local Kanzleien rather than a single integrated firm.

Broad incumbents

• BDO AG Wirtschaftsprüfungsgesellschaft: Top-5 global accounting network's German member firm, providing audit, tax and advisory. Overlaps with Treurag on audit and tax advisory services for mid-market clients but operates at much larger scale with corporate and international clientele.
• Mazars in Germany: International audit, tax and advisory firm with a substantial German practice covering audit, tax compliance, and business consulting. Comparable service lines to Treurag but at significantly larger scale and with broader geographic reach.
• RSM Germany (dhpg): German tax, audit and consulting firm and member of the RSM international network, serving mid-market clients across multiple German locations. Overlaps with Treurag on tax compliance, statutory audit, and business consulting, but with broader geographic coverage.
• Ebner Stolz: Independent German mid-tier audit, tax, legal and consulting firm with offices across Germany. Overlaps with Treurag on tax advisory, statutory audit, and business consulting for Mittelstand clients, but operates on a much larger scale and broader service menu.
• HLB Germany (Husemann, Eickhoff, Salmen & Partner): Mid-tier German tax, audit and consulting firm grouped under the HLB international network. Comparable in services (Steuerberatung, Wirtschaftsprüfung, betriebswirtschaftliche Beratung) to Treurag, but with multi-office German footprint.

Others

• DATEV: Germany's dominant IT and software cooperative serving tax advisors, auditors and accountants. Not a direct competitor but rather the backbone technology and data infrastructure on which most small German Kanzleien (including Treurag) run their daily workflows.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/treurag-ag

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Treurag AG