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SBM Tax Consultants

Advisory services are a MAJOR FOCUS of our firm!

We are here for you!

Whether tax or business management consulting – we have personally stood by our clients for over 25 years.

20 clever minds handle your account as a qualified, highly-motivated team, which you can trust and rely on to offer state-of-the-art working approaches and a high level of professional expertise.

Together we will find a solution for every challenge and jointly chart a course towards success.

fast – competent – proactive

Partners in the consultancy

Axel Brenner

Tax Consultant, Partner



I have been a tax consultant since 2000, and I particularly enjoy providing tax and business management advice to companies and private individuals, with annual financial statements and profitability analyses, along with and all aspects of company incorporation and succession planning.

Christian Mester

Tax Consultant, Partner



In February 2005 I passed my tax consultant exams. Since then I have been responsible for the office management. My job is to secure that my colleagues can work. In addition to personnel planning, quality management, acquisition and control functions, I also like to take care of my clients myself. This cannot always be brought in line smoothly, however both aspects together make the tax consultancy appealing.


Eleonore Steilen

Certified Accountant, Tax Consultant, Founder of the firm



After 6 years of in-depth and successful work out on my own, I am extremely pleased to have found in Mr Brenner and Mr Mester, first two colleagues and ultimately long-term partners who will continue to lead the firm in my interest.

A tax consultancy steeped in history

Auszeichnung "Digitale DATEV-Kanzlei 2024"

Auszeichnung "Exzellenter Arbeitgeber 2024"

Rezertifizierungsaudit ISO 9001 : 2015

Überwachungsaudit "DStV-Qualtitätssiegel"

Auszeichnung "Digitale DATEV-Kanzlei 2023"

Auszeichnung "Arbeitgebersiegel 2023"

Auszeichnung "Digitale DATEV-Kanzlei 2022"

Auszeichnung "Arbeitgebersiegel 2022"

Auszeichnung "Digitale DATEV-Kanzlei 2021"

Überwachungsaudit "DStV-Qualitätssiegel"

Auszeichnung "Arbeitgebersiegel 2021"

Rezertifizierungsaudit ISO 9001 : 2015

Award "Digital DATEV Firm 2020"

Retirement of Ms Steilen - "You never really step down completely!"

Monitoring audit - "German Association of Tax Advisers Seal of Quality"

1. SBM Christmas market + jubilee of 20 years on Bonner Landstrasse

"ISO 9001 : 2015" Certificate

"German Association of Tax Advisers Seal of Quality : 2015" Certificate

Name change to "Steilen Brenner Mester Partnership Tax Consultants"

Erstes digitales Buchhaltungsmandat

Das papierlose Büro - Einführung digitales Dokumenten-Management.

Digitalisierung in der Belegerfassung nimmt Fahrt auf - Wir ermutigen Mandanten, die Vorteile zu nutzen.

Entry in the partnership register

Establishment of the partnership "Steilen + Brenner + Partner" with Mr. Mester

Establishment of the partnership "Steilen + Brenner + Horn"

Establishment of the partnership "Steilen + Brenner"

Move from Industriestrasse to Bonner Landstrasse

Founding of the "Steilen Tax Consultancy"