Banks that Won on Deposit Growth in 2025 Got Boost From M&A

Why It Matters

The findings illustrate that M&A has become a critical lever for banks to secure cheap, stable funding amid intensifying deposit competition, directly influencing balance‑sheet health and lending capacity.

Key Takeaways

• Mid‑size banks grew deposits 8% via acquisitions
• Industry deposit growth only 4% in 2025
• 27 banks' deposits rose 29% after deals
• M&A volume jumped over one‑third year‑over‑year
• Deposit competition expected to rise in 2026

Pulse Analysis

The 2025 deposit landscape marked a turning point for regional banks, which had wrestled with shrinking organic inflows after years of stimulus‑driven surges. As the Federal Reserve trimmed rates, the cost advantage of cheap deposits eroded, prompting institutions to seek alternative pathways. Mergers and acquisitions emerged as a pragmatic solution, allowing banks to inherit established deposit bases rather than rely on volatile brokered funding. This strategic shift is reflected in the Invictus Group’s data, which shows midsize banks achieving deposit growth rates far above the sector average.

Case studies underscore the potency of deal‑driven deposit expansion. Columbia Banking System’s acquisition of Pacific Premier Bancorp propelled its core deposits 34% year‑over‑year, while Eastern Bancshares’ purchase of HarborOne added roughly 20% to its deposit pool, despite organic decline. Across the 27 banks in the $10‑$100 billion tier, combined deposit growth surged 29%, dwarfing the industry’s modest 4% increase. These transactions not only bolstered liquidity but also aligned loan‑to‑deposit ratios, mitigating the risk of balance‑sheet imbalances that can arise from over‑reliance on expensive funding sources.

Looking ahead, deposit competition is projected to intensify, with nearly half of surveyed banks anticipating heightened pressure in 2026. This outlook suggests that M&A activity will remain a vital tool for institutions seeking to fortify their funding foundations. However, regulators and investors will scrutinize the quality of acquired deposits and the integration risks that accompany rapid consolidation. Banks that blend organic growth with judicious acquisitions are likely to emerge with more resilient balance sheets, positioning them to capitalize on future lending opportunities while navigating a competitive funding environment.