Banking M&A: How Early Tech and Data Planning Can Smooth Integration

Early technology and data planning is essential in Banking M&A to smooth integration and protect deal value. The Deloitte report notes that data and technology questions, while critical, are not always top of mind during deal formation, even as regulatory windows narrow. The sign-to-close window has grown longer in recent years due to regulatory scrutiny, while the post-announcement period before Legal Day 1 has shortened; 2025 marked a turning point with shorter timelines. Executing planning in parallel with deal discussions can enable a seamless Legal Day 1 and faster end-state migrations, while reducing risk and costs. In practice, stronger tech and data planning can lower integration costs, expedite synergy capture, and strengthen the customer experience. The study offers a concrete action approach: prioritize technology and data decisions during the sign-to-close window. This alignment helps accelerate synergy capture, improve customer experience, and lower integration costs. Leaders should coordinate plans for both immediate Day 1 migrations and long-term end-state states, rather than treating IT as a separate stream. The message is clear: technology and data are central to whether an announced deal delivers on its promises.