Michigan’s Mercantile Bank partners with Jack Henry to modernize its core tech ahead of a merger, integrating core processing and enterprise workflow for better efficiency, automation, and scalability.
Key Highlights
Core banking migration and workflow automation
Mercantile Bank has selected Jack Henry’s core processing platform along with its Enterprise Workflow solution to automate manual processes, streamline operations, and improve system integration.Merger-driven transformation & timeline
The bank is preparing for its upcoming merger with Eastern Michigan Bank. The full transformation is scheduled to be completed by Q1 2027 under the Mercantile brand, aligning with the core migration project.Strategic growth & community banking focus
With ~$6.2 billion in assets, Mercantile Bank—Michigan’s largest community bank—is using this core upgrade to support long-term goals: organic growth, market expansion, and selecting only the right acquisition fits. The evaluation for the vendor took two years and involved over 60 stakeholders.
Summary Story
Mercantile Bank, a $6.2 billion-asset community bank based in Michigan, has chosen Jack Henry to modernize its core banking technology. The bank will adopt Jack Henry’s core processing platform and Enterprise Workflow solution to enhance efficiency, reduce manual tasks, and integrate systems more tightly.
This tech upgrade comes as Mercantile prepares for a merger with Eastern Michigan Bank, finalized in Q4 2025, with the full tech transformation under the Mercantile brand scheduled for Q1 2027. Eastern Michigan Bank already has 40+ years of experience on the Jack Henry platform, which supports a smoother transition.
The decision to pick Jack Henry followed a rigorous two-year evaluation process engaging more than 60 internal stakeholders. Mercantile sees this move as critical to supporting its ambitions: expanding organically, entering new markets, and pursuing acquisitions that align with its strategy. By upgrading its core system, Mercantile intends to strengthen its delivery of services in commercial, retail, municipal, non-profit, and agricultural banking.
