More than 45 YEARS of SONNTAG

1978 - 2024

Everything under one strong roof. WE are SONNTAG.

Constantly growing expertise, numerous experts and the development of further specialist areas have accompanied us at Sonntag & Partner Partnerschaftsgesellschaft mbB in recent years. We have continued to develop and founded the SONNTAG brand in 2021. This strong roof now unites all the experts, expertise and specialist areas and divisions we have acquired over the years.

The individual companies remained in their form and performance. Only the name changed from "Sonntag & Partner" to "SONNTAG" to emphasize the affiliation to the SONNTAG corporate network. Since then, the companies operate as SONNTAG Audit. Tax. Law; SONNTAG Family Office; SONNTAG Vermögensbetreuung; SONNTAG Audit and SONNTAG IT Solutions.

The transformation reflects the spirit and close collaboration within the company and further strengthens unity and external presence.

The topics of digitalization, specialization in the consulting fields, innovative solutions, the way (mobile) information flows and many other exciting areas play an important role in keeping up with the times.

We continue to meet the challenges of our clients with enthusiasm, support them proactively, and gladly accompany them into the future.

The fifth chapter of SONNTAG has begun.

2023

SONNTAG grows at the Ulm location through the merger with the tax consultancy and auditing company SP&P.

More than 500 people now work at SONNTAG.

2022

Further growth: 400 people now work at SONNTAG.

2021

The expertise gained over the years, along with additional specialized fields and divisions, is consolidated under the strong roof of the brand "SONNTAG".

The firm's workforce grows to 380 employees.

2020

We bid farewell to our firm's founder and namesake, Dieter Sonntag, who passed away suddenly and unexpectedly.

The firm employs over 370 people at the end of the year.

Foundation of SONNTAG Smart Tax GmbH.

2019

The firm employs over 270 people.

Foundation of SONNTAG IT Solutions GmbH & Co. KG.

SONNTAG_IT_Solutions

PRESENT
The fourth decade, S&P 2008 - 2018

2018

  • 240 employees, of these,
  • - 28 partners
  • - 10 trainees

2017

Sonntag & Partner “occupies” approximately 9,000 m² office space in all of its locations

2016

Opening of Sonntag & Partner branch in Nuremberg

2013

Ulm becomes an independent law firm location

2012

S&P opens an office in Frankfurt

2012

1st place JUVE Award: “Law Firm of the Year for Mid-sized Businesses”

2010

Sonntag & Partner employs 175 employees

PRESENT
3 x 10 years l S&P 1998 – 2007

2006

> 140 employees

2003

Opening of the Sonntag & Partner Munich location

2001

The S&P Family Office was founded

 

2000

  • At the turn of the millennium, 95 employees, including partners and trainees, are part of the S&P team

1999

The law firm moves into Prinz Karl Palais in Augsburg

PRESENT
20 years of S&P 1988 – 1997

1996

65 employees, including partners and trainees, are part of the original staff of Sonntag & Partner

1993

The law firm expands to the subject areas of legal consulting and trial representation

1990

The employee base grows to 34 employees

PRESENT
Die ersten 10 Jahre 1978 - 1987

1986

23 employees are part of the original Sonntag & Partner team

1982

Peter Alterauge and Dr. Peter Berndsen expand the sole practitioner law firm into a partnership

1980

6 employees are employed by Sonntag & Partner in Augsburg

1978

Dieter Sonntag founds Sonntag and Partner as a sole practitioner with areas of emphasis in tax consulting and auditing

PRESENT

Wir verzahnen wirtschaftliche, steuerliche und rechtliche Aspekte und beraten fachübergreifend und auf Augenhöhe.

Wir begleiten große Familienvermögen, um langfristige Werte über Generationen zu bewahren.

Wir bieten maßgeschneiderte, praktikable Lösungen zu IT-Compliance, Digitalisierung und IT-Projektmanagement.

Wir beraten, bewerten und prüfen – national, aber auch international als unabhängiger MOORE-Netzwerkpartner.

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