Deutsche Bank / Postbank · 2016 · cost index 5/5
Deutsche Bank absorbs Postbank into integration purgatory
Multi-year, multi-billion IT integration; branch and core systems lagged for a decade
What happened
The Postbank acquisition was sold as scale. In practice it was two retail banks, two core stacks, and one integration program that outlived executives, consultants, and several "target architectures." Customers saw outages, duplicate accounts, and branch chaos while slide decks promised a unified platform Real Soon Now.
Failure mode
M&A as architecture trigger without a strangler plan. SOA middleware, vendor packages, and internal fiefdoms ran in parallel for years. Each "big bang" cutover date slipped because nobody owned the ugly reconciliation logic in the legacy cores.
Lesson
Bank mergers are data integration projects wearing suits. If you cannot name the system of record for a retail account on day one, you do not have a strategy — you have a decade of risk and a line item for Capgemini.
Sources
- Financial Times — Deutsche Bank Postbank integration
- Bloomberg — German banking IT transformation costs
- BaFin public remarks on operational resilience (context)
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