The Deposit Flight You're Not Measuring: Why CD Ladders Are Collapsing Your Funding Strategy

Here's a problem hitting community and mid-sized banks right now, and most boards don't know it's happening:

CD renewal rates have collapsed.

The "laddered" CD strategy (3-month, 6-month, 1-year, 2-year, 5-year CDs with staggered maturity dates) is how regional banks manage funding duration and predictability. The math used to work: - CDs mature regularly - Depositors roll them over (most do automatically) - Bank retains the funding - Predictable liability side of the balance sheet

Except they're not rolling over anymore.

Instead, depositors are taking their CD money and moving it to money market mutual funds, Treasury direct, or I Bonds—all of which now offer better yields with comparable safety.

The Arbitrage (Why It's Happening Now)

Your CD offering (March 2026): - 3-month CD: 4.35% - 6-month CD: 4.50% - 1-year CD: 4.65% - 2-year CD: 4.70% - 5-year CD: 4.80%

Competitor offerings: - Money Market Fund (Treasury-backed): 5.10% (fully liquid, SIPC insured) - Treasury Direct (6-month T-bill): 5.35% (U.S. government backed) - Treasury Direct (1-year T-bill): 5.25% - I Bonds (federal): 5.27% (penalty-free after 1 year) - High-yield savings (online bank): 4.85% (fully liquid)

The depositor calculation: - CD: 4.65% (locked 1 year, FDIC insured) - Treasury: 5.25% (locked 1 year, government backed, fully liquid after maturity) - Difference: 60 bps on a $100K deposit = $600/year

For a $1M depositor, that's $6,000/year left on the table by staying in your CD.

The depositor sees this. And they're taking action.

What's Happening to Your CD Book

This isn't theoretical. Banks are reporting:

CD maturity flow analysis (Feb-Mar 2026): - Historical renewal rate (2019-2022): 72-78% - Current renewal rate (Mar 2026): 48-55% - Decline: 20-30 percentage points

Example bank ($8B assets, $3.2B CD book):

Monthly CD maturities: ~$280M

Historical: 75% renew = $210M stays at bank, $70M leaves Current: 52% renew = $145M stays at bank, $135M leaves

Monthly funding gap: $65M (25% increase in outflow)

Annual impact: $780M in lost CD funding

This bank has to: 1. Raise rates on new CDs (to recapture some deposits) 2. Find $780M in alternative funding 3. Accept lower NIM (net interest margin) or restrict lending

If you're a $10B bank with similar CD concentration, you're facing a $1B+ annual funding challenge.

Why This Isn't Showing Up on Your Dashboard Yet

Reason #1: You're measuring CD renewal rates separately from maturity flows.

Most banks track: - % of CDs renewed (renewal rate) - Dollar amount renewed

But they don't track: - Where the depositor's money went (to competitor bank, to money market, to Treasury, to withdrawal) - Why they didn't renew (rate dissatisfaction, didn't need the money, found better alternative)

Reason #2: Your deposit pricing is lagged.

You probably price CDs monthly or quarterly. You adjust rates based on: - Your cost of funds - Competitor rates (from last month's survey) - Funding needs

But you're not comparing yourself to Treasury direct, money markets, or I Bonds in real time. You think you're competitive at 4.65% when you're actually 60 bps below Treasury and 45 bps below money markets.

Reason #3: Deposit granularity is missing.

You probably don't track "which $100K CD customers are likely to switch." You treat all CDs as a single product class.

In reality: - Small CDs ($25K): More likely to renew or withdraw (less price-sensitive, may not shop alternatives) - Mid-sized CDs ($100K-500K): Shopping alternatives actively - Large CDs ($1M+): Definitely shopping alternatives, may be negotiating better rates

Your renewal rate might be 52% overall, but it's probably: - 70% for small CDs - 45% for mid-sized - 25% for large

You're losing expensive funding (the large CDs are core to your funding strategy) while thinking you're doing okay.

The Real Impact on Your Balance Sheet

Let's model what this means for a $10B bank:

Current state (Mar 2026): - CD book: $4.2B - Monthly maturities: $350M - Renewal rate: 52% - Funding inflow from CDs: $182M/month - Funding outflow: $168M/month

Cost of new funding (to replace outflows): - Fed funds: 5.25% - Borrowings from other banks: 5.15% - Retail deposit alternatives (savings, MMA): 4.75% - Raising CD rates: 4.95% (to be competitive)

Current NIM (net interest margin): 2.85%

If you raise CD rates to 4.95% to recapture deposits: - Cost of deposit funding rises from 4.65% to 4.95% (30 bps) - NIM compression: 2.85% → 2.82% (3 bps) - Annual impact on a $10B asset bank: $3M in lost NIM

If you don't raise CD rates: - $168M monthly outflow x 12 = $2.016B annual CD outflow - Must replace at 5.15% (Fed funds rate) - vs. current cost of 4.65% - Spread: 50 bps on $2B = $10M annual cost

So you're choosing between: 1. Compress margin 3 bps (lose $3M) by raising CD rates 2. Replace funding at 5.15% (lose $10M) by not raising rates

Either way, you're losing $3-10M annually. Most banks choose option #1 (raise rates) and rationalize the margin compression.

What Smart Banks Are Doing

Strategy #1: Shift away from CDs toward "stickier" deposits.

Instead of chasing CD renewals, build: - Transaction deposits (checking accounts, business cash management) - Sweep deposits (linked to lending relationships) - Relationship-based deposits (if you're the bank, they stay)

Stickier deposits are 50-75 bps cheaper than CDs and more stable.

Cost of implementation: Investing in digital banking, business banking features, and relationship infrastructure.

Time horizon: 18-24 months.

Strategy #2: Match the competition on rates, accept the margin hit.

If Treasury is at 5.25% and your CD can't compete, raise your CD rates to 5.10%.

Yes, NIM compresses. But you retain funding. The alternative (losing $2B in deposits) is worse.

Banks that did this aggressively in 2022-2023 retained deposits and protected market share. Banks that lagged lost deposits and had to raise rates at higher levels later.

Strategy #3: Offer structured products instead of plain vanilla CDs.

Instead of a 1-year CD at 4.85%, offer: - Step-up CD (4.50% year 1, 5.00% year 2) - Callable CD (5.25% if rates don't fall below 4.5%) - Market-linked CD (CD + equity index participation)

Slightly more complex for depositors. But more attractive rates for the bank. And more "stickiness" (depositors are more locked in).

Strategy #4: Build alternative funding channels.

Reduce reliance on retail deposits altogether: - Brokered deposits (use deposit brokers to access wholesale funding) - Reverse repos (short-term borrowing against securities) - Fed Home Loan Bank advances (FHLBank borrowing, often cheaper than deposits) - Correspondent bank funding

Reduces deposit pricing pressure because you have alternatives.

What Your Measurement System Is Missing

If your CFO/treasurer isn't tracking these metrics weekly, you're flying blind:

1. CD renewal rate by maturity bucket and size. - Where are we losing the most money? - Large CDs maturing and rolling elsewhere?

2. Destination analysis (where did the money go?). - Surveys to departed depositors - Market research on competitor offerings - Comparison to Treasury, I Bonds, money markets

3. Pricing gap analysis. - Are our CDs competitive vs. local competitors? - vs. Treasury? - vs. money markets?

4. Deposit cost trend. - What's the all-in cost of our deposit book? - Is it rising faster than rates? - What's the forward cost assumption in your budget?

5. Funding adequacy stress test. - If CD renewal rates fall to 40%, can we still fund the balance sheet? - What alternative funding channels do we have? - What's the cost?

If you can't answer these questions, your board probably can't either. And your balance sheet is more fragile than you think.

What Your Board Needs to Know (This Quarter)

Add to the agenda:

1. CD renewal rate trend (last 12 months). - Are rates declining? - By customer segment? - Projected impact on annual funding?

2. Pricing analysis: Your CD rates vs. Treasury/money markets. - What's the gap? - Can depositors see the arbitrage? - What's our strategy to compete?

3. Forward funding plan. - If CD renewals stay at 50%, how do we fund the balance sheet? - What's the impact on NIM? - What deposit or funding strategies do we need to deploy?

4. Stress-test: Deposit outflow scenario. - If CD renewals drop to 35% (worst case), what happens? - Do we have enough liquidity? - What constraints does this put on lending?

The bottom line: CD funding is becoming less reliable. Banks that recognize this and proactively shift toward stickier deposits, match competitive rates, or develop alternative funding will maintain flexibility.

Banks that assume "deposits will come back" are making a dangerous bet.

They won't. Not until Treasury rates fall materially. And there's no guarantee they will anytime soon.

Plan accordingly.