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As banking technology evolves and customers gain more ways to manage money, the financial industry faces a critical liquidity challenge. The old definition of a “core deposit” is becoming obsolete, forcing institutions to look beyond product type and cost to the behavior of the relationship itself.
**Why Redefining Core Deposits is Urgent**
In a recent survey, 70% of financial institutions named growing and retaining core deposits as their top challenge for 2026 and beyond. Yet, there is no consistent industry definition for what a “core” deposit actually is. This ambiguity directly impacts pricing, funding strategy, and competitive positioning.
The fundamental question now is not *what* the deposit is, but *how stable* the relationship is. A low-cost checking account that leaves tomorrow may be far less valuable than a higher-cost relationship that remains through multiple rate cycles.
**The Evolving Deposit Landscape and Customer Behavior**
Competition for deposits now spans online banks, fintechs, brokerage accounts, and emerging alternatives like stablecoins. Customers, having experienced historic rate hikes and bank failures, are managing their deposits more actively, like portfolio managers.
Data shows deposit relationship stability has shifted. After a period of unusual growth and stability during 2020-2021, retention fell sharply in 2023. While it has improved, it remains below pre-pandemic averages. The key strategic question is whether this change in customer behavior is temporary or permanent.
**Actionable Steps:**
* Analyze how your customer base behaved during the last rate cycle.
* Identify which relationships proved most resilient.
* Monitor early warning indicators like activity levels and relationship breadth.
**The Hidden Story Behind Deposit Growth Numbers**
Headline deposit growth figures can be misleading. Two institutions can report the same total growth while having vastly different underlying dynamics.
* **Example:** One institution replaces $100 million in outflows with $100 million in new money, maintaining a $1 billion total. This high churn is costly.
* Another retains nearly all existing relationships while growing, indicating a stable funding base.
Replacing lost deposit relationships currently costs roughly **25–40 basis points more** than retaining them. This represents a significant difference in funding economics and should lead to different strategic priorities.
**Actionable Steps:**
* Separate growth from new relationships versus growth within existing ones.
* Identify which customer segments are adding versus contracting balances.
**A Practical Framework for Identifying Core Deposits**
A perfect definition may not exist, but a practical approach focuses on relationship behavior. Institutions should analyze deposits based on these six key questions:
1. Does the relationship remain through rate cycles?
2. Do balances stay when attractive alternatives emerge?
3. How rate-sensitive is the relationship?
4. How broad and valuable is the overall relationship?
5. How difficult and expensive would these deposits be to replace?
6. Is new growth expanding the franchise or just replacing outflows?
The goal is to move from a static product definition to a dynamic understanding of stability, rate sensitivity, and replacement risk. This analysis guides where to price, where to invest resources, and where the best opportunities lie.
**Redefining “Core” for Your Institution**
Ultimately, a core deposit is a relationship-based deposit an institution can expect to retain at a reasonable cost across changing environments. However, each institution must apply this concept idiosyncratically.
The new guiding question is: **What does a core relationship look like at *my* institution, and what are we doing differently today based on that definition?**
This behavioral insight is crucial for building a valuable, stable funding base that supports long-term franchise growth.
Source: Thefinancialbrand.com