1962 Dkfm. Dr. Walter Stauffer establishes an auditing and tax advisory firm.
1976 Dkfm. Dr. Stauffer admits his first partner - Dkfm. Wolfgang Gassner: the firm becomes Auxilia Treuhand GmbH.
1994 Auxilia Treuhand becomes a member firm of the international BDO network, the fifth largest worldwide professional services organization (BDO stands for the founding members Binder, Dijker and Otte).
1996 BDO Auxilia acquires UNICONT Revisions- und Treuhand-GmbH, an old established Viennese firm of tax advisers.
2006 The firm Lechner Linz Treuhand Wirtschaftsprüfungs- und Steuerberatungs-GmbH joins the BDO Group network, becoming the BDO representative in Upper Austria.
2010 As part of the international BDO New Naming Project, BDO Auxilia Treuhand GmbH becomes BDO Austria GmbH. In order to expand and strengthen BDO’s presence in eastern Austria, BDO Austria GmbH takes a successful strategic stake in Burger & Partner Wirtschaftsprüfungsgesellschaft m. b. H. BDO Upper Austria, with its head office in Linz, strengthens its presence in the region with offices in Eferding and Ottensheim.
2015 65 experts from Grant Thornton joined the BDO network, under the firm name BDO Agitas GmbH, continuing the expansion of our expertise in the areas of auditing, tax advisory services, accounting, financial advisory services, and forensic, risk & compliance services.
2016 BDO expands its advisory services by acquiring the firm of Strametz & Partner, which now operates under the name of BDO People & Organisation Consulting GmbH. This firm provides a complete spectrum of services in the executive recruiting, development and diagnostic services sectors.
2017 BDO started a cooperation with Dr. Edelsbacher und Partner Wirtschaftsprüfungs- und Steuerberatungsgesellschaft mbH, which is located in Salzburg. At the beginning of May 2017, BDO strengthened its engagement in Styria and established a new location at Murtal.
2018 BDO grows once again: The Austin | BFP Unternehmensgruppe becomes a full member of BDO in Austria, operating under BDO Styria. Thus, BDO is now the largest provider of audit and consulting services in Styria. BDO will increasingly focus on consulting.
In August 2018, BDO strengthened its presence in Vienna, Linz and Bruck/Leitha with the Jonasch & Platzer group of law firms, while also expanding its expertise in risk advisory.
2020 The KS group was welcomed under the BDO umbrella. The experts in Burgenland not only provide advice on tax and business management, but also specialize in the local sector.
Grahammer & Partner Unternehmensberatung GmbH joined BDO on May 1st, 2020 and has been operating under the name BDO Corporate Finance GmbH since that date. The new BDO location in Dornbirn serves clients in both Vorarlberg and Tyrol, significantly expanding BDO's presence in western Austria.
In December 2020, dr. mayer gmbh wirtschaftsprüfungs- und steuerberatungsgesellschaft – or dmg for short – joined the BDO network, strengthening its presence in Upper Austria.
2022 The BDO family will be expanded to include another federal state. With the opening of the new location, BDO experts are now also present in Klagenfurt with their know-how. In addition to classic consulting services, they also focus on regional consulting.
In addition, Baumgartner & Partner will join BDO in September. In Wolfsberg, they advise start-ups, sole traders, SME and freelancers, as well as the public sector. Thanks to their regional roots, they will strengthen BDO's presence in Carinthia.
2023 The new location in Eisenstadt will be opened and will henceforth support the care of BDO clients in Burgenland and in the south of Lower Austria. The professional focus is primarily on supporting medium-sized companies and the public sector in the areas of tax advice, auditing and consulting.
2024 The Dornbirn office moved to Lustenau and expanded its entire service portfolio in Vorarlberg. The focus in Vorarlberg is on corporate finance and tax advice. In addition, Ager & Partner will join BDO and increase its expertise throughout Austria with the Tyrolean office in Schwaz. In addition to traditional tax advice and accounting, the location also offers services in the areas of assurance, consulting, corporate finance, and people & organisation.