In the 1970s, Fiducia began to establish subsidiaries and participating interests in other companies, to serve the expanded customer base with industry-specific solutions and services.

In the 1980s Fiducia supported automation of payments by installing ATMs in the dialogue system, started the development of a banking application procedure.

After a further merger in 1999 with the GRK BG data center Kassel GmbH, and the RWG Rechenzentrale Wurttembergischer cooperatives GmbH, Stuttgart in 2001, Fiducia AG Karlsruhe / Stuttgart developed the Fiducia banking procedures together with the rbg Rechenzentrale Bavarian cooperatives eG.

According to market research firm Gartner in 2004, Fiducia developed into the seventh-largest IT service provider in Germany.

In 2006 the PSD Bank made a decision to gradually migrate from Sparda (SDV) to agree, which happened by July 2008.

With massive pressure from the owners of both companies and with the objective of saving costs, merger talks began again in September 2011.

The Federal Cartel Office approval of the merger was announced in late May 2012, however, talks ended in July 2012 due to differences in company valuation.

For all IT solutions, Fiducia offers extensive support for the implementation and optimization of the applications in the form of consulting, training and coaching.

Fiducia operates two active and fully redundant data centers with more than 8,700 Unix servers in the Karlsruhe area.

A high-security data center with a high degree of automation, focusing on protection from failures and attacks, was put into operation in 2008 in the Rhine Stetten (district of Karlsruhe).

(As of 2012) Fiducia claims to have one of the largest MPLS networks to communicate with the local systems of its partner banks.

Fiducia is also, together with GAD, responsible for the technical and operational implementation of the payment procedure in the cooperative banks.