Core deposits are the stable, low-cost funds that everyday customers keep in checking accounts, savings accounts, money market accounts, and smaller certificates of deposit at their bank. Regulators define them precisely: under the FDIC’s Uniform Bank Performance Report, core deposits are the sum of transaction accounts, money market deposit accounts, other savings accounts, and time deposits of $250,000 or less, minus any brokered deposits below that threshold.1Federal Deposit Insurance Corporation. RMS Manual of Examination Policies – Section 6.1 Liquidity and Funds Management They matter because they are the cheapest, stickiest money a bank has, and the share of a bank’s funding that comes from them is one of the clearest signals of its health.
What Counts as a Core Deposit
The categories included are straightforward: demand deposits (checking), NOW accounts, money market deposit accounts, other savings accounts, and CDs up to $250,000. Brokered deposits are excluded from the count even when they sit below the insurance cap, because they lack the ongoing customer relationship that makes a deposit reliable.1Federal Deposit Insurance Corporation. RMS Manual of Examination Policies – Section 6.1 Liquidity and Funds Management
The $250,000 line matters because it matches the FDIC’s standard maximum insurance amount per depositor, per ownership category, at each insured bank. Since the FDIC was established in 1933, no depositor has lost a penny of insured funds.2Federal Deposit Insurance Corporation. Understanding Deposit Insurance That guarantee is what makes these balances stable. A retail customer with $80,000 in checking has no reason to bolt during a downturn, because the money is fully protected.
So the ingredients of a core deposit are simple. The account belongs to a person or small business, the balance sits within insurance limits, it’s tied to an actual banking relationship rather than pure yield-chasing, and it wasn’t placed by a third-party broker. Remove any one of those and the deposit starts behaving very differently.
Core Deposits vs. Hot Money
Non-core deposits are often called “hot money.” They include large institutional balances above the $250,000 insurance cap, jumbo CDs held by corporations or government treasurers, and brokered deposits placed by intermediaries chasing the best rate. A brokered deposit is any deposit obtained through or with the help of a deposit broker, typically a third party moving funds to whichever bank pays the most.3eCFR. 12 CFR 337.6 – Brokered Deposits The depositor may not even know which bank holds the money, and when a competitor offers a better rate, the money leaves.
p>The cost gap is significant. As of early 2026, the average checking account paid roughly 0.07% and the average savings account about 0.39%. Banks competing for institutional money on brokered or jumbo CDs pay a great deal more. A bank funded largely by cheap checking and savings balances has a real profitability advantage over one financing itself in wholesale markets.
The stability gap is bigger still. When rates spike or confidence wobbles, non-core depositors renegotiate or walk. A bank leaning on that money may be forced to sell assets at a loss to meet outflows. Core depositors, held in place by insurance, habit, and the friction of switching banks, tend to stay.
Why Core Deposits Matter to a Bank
A high proportion of core deposits is one of the strongest indicators of bank health regulators look at. Banks where core deposits represent 85% to 90% of total deposits are generally considered well-funded. Banks heavily reliant on non-core sources attract closer supervisory scrutiny.
Stable funding also shapes what a bank can lend. A bank confident in its deposit base can commit to 15-year commercial real estate loans or 30-year mortgages, knowing the money behind them won’t disappear next quarter. A bank dependent on hot money has to match its funding to shorter, more liquid assets, which limits both the customers it can serve and the returns it can earn.
Core deposits also protect margins when rates rise. Bankers track this through the “deposit beta,” which measures how much a bank’s deposit rates move relative to a change in the federal funds rate. If the Fed raises rates half a point and a bank raises its savings rate by 0.10%, that deposit beta is 20%. The lower the beta, the more of the rate hike the bank keeps. Checking and savings holders generally accept below-market rates in exchange for easy access, and most don’t watch rate moves closely, so their betas stay low. Term deposits like CDs reprice faster because customers shop at maturity.
Regulators reinforce all this by restricting what struggling banks can do. A well-capitalized bank has no restrictions on accepting brokered deposits. An adequately capitalized bank needs an FDIC waiver. An undercapitalized bank is barred from accepting them at all.4eCFR. 12 CFR 337.6 – Brokered Deposits Banks below well-capitalized status also face interest rate caps that stop them from luring deposits with above-market rates. The framework effectively pushes weak banks toward a core-deposit funding structure or forces them to shrink.
What Happens When a Bank Lacks Core Deposits
The collapse of Silicon Valley Bank in March 2023 is the clearest recent illustration. Roughly 94% of SVB’s deposits were uninsured, sitting above the $250,000 threshold and belonging mostly to venture capital firms and tech startups with large, concentrated cash balances.5Federal Reserve Board Office of Inspector General. Material Loss Review of Silicon Valley Bank These were sophisticated depositors watching rates closely, with every incentive to move at the first sign of trouble.
On March 9, 2023, SVB customers withdrew $42 billion in a single day, close to a quarter of total deposits. Another $100 billion in withdrawal requests were pending for the following morning. Regulators seized the bank on March 10.5Federal Reserve Board Office of Inspector General. Material Loss Review of Silicon Valley Bank
The Federal Reserve’s post-mortem was blunt. It found that SVB’s management and supervisors “did not appreciate the risks associated with this concentration and seemed to presume that SVB’s depositors would remain at SVB because of their perceived loyalty.”5Federal Reserve Board Office of Inspector General. Material Loss Review of Silicon Valley Bank A traditional core deposit base of insured retail and small business accounts would not have produced that kind of single-day outflow. Core deposits are not just a profitability tool; they are a survival mechanism.
What This Means for You as a Depositor
The composition of a bank’s funding tells you something about its stability. A bank funded primarily by core deposits from customers like you is inherently more resilient than one leaning on institutional hot money. Your deposits are insured up to $250,000 per ownership category regardless, so you won’t lose insured funds either way, but dealing with a failed bank is a headache worth avoiding.2Federal Deposit Insurance Corporation. Understanding Deposit Insurance
The trade-off is clear. Core deposits are cheap for banks because they pay you very little interest. Your checking account earning 0.07% is subsidizing lending, and in exchange you get convenience, FDIC insurance, branch access, and the rest of modern banking infrastructure. Move that money to a high-yield online savings account or a brokered CD and you earn more, but from the bank’s perspective your dollars have shifted out of the core column.
When you want to gauge a bank’s health, look at how it funds itself. Community banks and regional institutions that draw most of their deposits from local retail customers and small businesses tend to have strong core deposit ratios. Banks that have grown quickly by offering above-market rates or leaning on brokered deposits may be more vulnerable when conditions shift. That doesn’t mean avoiding high-yield accounts, but knowing where your bank’s money comes from gives you a clearer picture of the institution holding yours.