Why core deposits should top every community bank's 2027 plan, and what to do about it before the year begins

The deposit conversation has changed many times. In the early 1990s, it was about brick-and-mortar convenience. Before the financial crisis, it was about CD specials in the Sunday paper. After the crisis, when rates sat near zero, deposits seemed almost like an afterthought. Money arrived on its own, and many banks had more liquidity than they knew what to do with.

That era is over. As boards and management teams finish their 2027 strategic plans, one priority belongs ahead of the others: protecting and growing core deposits. It isn't the most exciting item on the agenda. But nearly every other goal depends on it, from loan growth and margin to liquidity and, in the end, the bank's independence.

In the Conference of State Bank Supervisors' (CSBS) 2026 Annual Survey of Community Banks, bankers named core deposit growth and net interest margin as the top two external risks they face.¹ The two are linked. A bank that can't fund itself with stable, low-cost core deposits ends up paying for wholesale funding, brokered money, or rate-chasing CD promotions. That cost comes straight out of the margin.

The same survey found that nearly 60% of community bankers are concerned that stablecoins could affect their deposits and lending capacity.² Ten years ago, that worry would have sounded like science fiction. Today it reflects a real change in how money moves and where customers keep it. Every dollar that moves into a digital token, a brokerage sweep, or a fintech wallet is a dollar the local bank can't lend to the family farm, the Main Street retailer, or the first-time homebuyer.

Every lesson from the past few years comes back to one point: the risks that hurt banks are the ones they did not model. Here is where community banks should focus their attention.

For decades, the deposit playbook had one main move: when you need money, raise the rate. That playbook is worn out. Deposit competition today isn't only about who posts the highest number on the lobby sign. Customers, and business customers especially, now judge their bank on convenience, digital capabilities, treasury services, payment speed, and the overall value of the relationship.

That's good news for community banks, if they act on it. A bank that competes only on rate is in a race to the bottom against online banks and money-market funds with national scale. A bank that competes on relationship value can hold deposits at a reasonable cost because the customer gets something they can't easily find elsewhere: a local decision maker, a treasury solution that fits their business, and the confidence that someone answers the phone.

Historical deposit behavior is a useful guide, but it describes the world that was, not the one that might be. Mobile banking, instant payments and online rate comparison have changed how quickly money can leave. Rather than relying only on past decay rates and betas, ask harder questions: What happens if your largest depositors move 20% or 30% of balances in a single quarter? How concentrated are your uninsured balances? Which relationships are truly sticky, and which only look that way because rates have not given customers a reason to move? Test the assumptions, then document why you chose the ones you did.

Earnings at risk tells you how the next 12 to 24 months could play out. Economic value of equity tells you what is happening to the long-term value of the franchise. Too many banks watch one and treat the other as a compliance exercise. They answer different questions, and a balance sheet can look fine on one measure while building real exposure on the other. Review both against board-approved limits, and when either moves toward a limit, the conversation should be about strategy, not just reporting.

A borrowing line is only as good as the collateral behind it. Confirm how much capacity you actually have with the Federal Home Loan Bank, the Federal Reserve discount window, correspondent lines and brokered or listing-service channels, and how much of it depends on pledged collateral that is already spoken for. Then look at concentration. A bank that relies heavily on one wholesale source, or one large depositor group, has a single point of failure. Diversifying before you need the money is far cheaper than scrambling after.

This is the priority most often overlooked, and the one that matters most on a bad day. A contingency funding plan on paper is not the same as money in the account. Who has the authority to draw? Are the passwords, tokens and authorized signers current? Has collateral been pre-positioned, and how long does it take to move more? Is there a backup if the primary contact is out? Run a live test, ideally a small actual draw, on each contingent source at least once a year. The time to discover a broken process is during a drill, not during a deposit outflow.

ALM models are only as good as the behavioral assumptions inside them. If rates fall, borrowers will refinance and prepay, shortening asset cash flows just as reinvestment yields decline. If rates stay high, deposits will continue migrating from non-interest-bearing and low-cost accounts into CDs and money market products. And on either side of the balance sheet, repricing rarely happens on the day the market moves. Build realistic prepayment speeds, deposit migration patterns and pricing lags into your assumptions, and validate them against your own bank's recent experience rather than generic industry defaults.

Here is where ALM moves from the boardroom to the branch. If the bank is liability-sensitive and needs to shorten funding costs, a lender should not be able to book long-term fixed-rate loans at thin spreads without escalation. If the bank is flush with liquidity, deposit officers should not be matching every special rate in town. Pricing authority, exception limits and approval thresholds should flex with the bank's actual position and be reviewed whenever that position changes. When the people setting rates every day understand what the balance sheet needs, margin protection becomes everyone's job.

For banks heading into budget season, these steps can turn the priorities above into action before the 2027 plan is finalized:

1. Define your scenarios. Agree with the ALCO on at least five scenarios that reflect the paths above, including one that is specific to your local economy.
2. Challenge the assumptions. Review deposit decay rates, betas, prepayment speeds and pricing lags against your own recent data, and document any changes.
3. Map your funding. Build a single view of every funding source, its capacity, the collateral behind it and any concentration.
4. Run a contingent funding drill. Test access to each backup source, confirm authorized users and credentials, and record how long each step takes.
5. Align pricing authority. Update loan and deposit pricing guidelines and exception limits to reflect the bank's current balance-sheet position.
6. Refresh the board dashboard. Present the seven board-level measures with limits, trends and management commentary.
7. Consider an independent review. An outside validation of the ALM model and its key assumptions can strengthen both your decisions and your exam readiness.

Margin resilience is not about predicting the future. It is about building a balance sheet, a funding plan and a governance process that can hold up across a range of futures. The improvement in banking performance over the past year has given many community banks some breathing room. The smartest use of that room is to stress the assumptions that worked in good times, close the gaps before they are tested, and give the board a clear view of where the bank stands.

The next rate cycle will come, as it always does, on its own schedule. The banks that will be glad they did this work are the ones that start now.