About Sparkasse Zollernalb
Sparkasse Zollernalb, established in 1836, operates as a public-law credit institution owned by the Zollernalb district. The savings bank is affiliated with the German Savings Banks and Giro Association and functions as the market leader in its region.
The institution maintains 50 branches and self-service locations with 699 employees. As part of the Sparkasse-Finanz group, it offers universal banking services including building savings contracts, investment funds, insurance products, and leasing arrangements through partner organisations.
Starting position
The bank defined credit-card sales objectives focused on converting standard cardholders to premium gold-card customers. Rather than broad outreach with high waste rates, management wanted precision targeting. Anonymous data covering master records, payment transactions, turnover, and portfolio details for 12,500 standard credit-card holders was provided for analysis.
Solution
Using DetectX®, customer data was scored across potential classifications. The system weighted data attributes to identify patterns related to purchasing behaviour and transaction likelihood — surfacing the customers with the highest upgrade potential. In August, the targeted cardholders received a direct-mail offer.
Result
Almost 20 percent of the customers identified in the scoring process opted for the gold card within six weeks — against historical success rates of 2–4 percent in comparable campaigns without DetectX®.
The precision approach delivered dual cost reductions through efficient resource allocation and smaller, more effective campaign volumes. The bank subsequently applied this methodology across investment products, pension offerings, and lending — achieving over 70 percent accuracy in identifying at-risk customers.