On The Wire · 2026-05-31 · 8 min
Card acquiring is the safe line on a bank's payments P&L. Until you look at the slope. EU interchange caps took 30-45% out of margins since 2015. Fintech acquirers keep winning on price. Mid-sized European banks now lose 10-12% of merchants a year to lower-cost competitors, accelerating. Most banks treat A2A as a defensive hedge - something to offer so merchants don't leave. The math says it's the offensive line. This briefing walks the numbers on one example: a mid-sized European bank with 18,500 merchants and €47M in card acquiring revenue. €785K to integrate payware's transaction resolution network. €240K/year ongoing. By year 2, €7.75M of new A2A revenue plus €3.2M of card revenue retained from merchants who would have churned. By year 5, €97.84M cumulative net value, 14-month payback, churn from 12% down to 3.8%, NPS up 34 points. Full episode for the build-versus-join comparison (€8-12M and 24-30 months versus €785K and 6-9 months), the year-by-year financial model, three bank case studies, the risk register, and the decision framework for whether your bank should move now or wait. Full source material and the complete business case:
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