How do I evaluate a bank's deposit franchise?

Start with four things: the share of non-interest-bearing deposits, the bank's cost of deposits compared to peers, the stability of the deposit base through rate cycles, and whether deposits are growing organically. A bank with a strong deposit franchise has a low-cost, sticky funding base that competitors cannot easily replicate.

The deposit franchise is the single most valuable thing a bank owns, even though you won't find it listed as an asset anywhere on the balance sheet. It represents the bank's ability to attract and retain deposits at rates below what it could earn by lending or investing that money. The wider that gap, the more profitable the bank.

A strong deposit franchise gives a bank cheap, stable funding that sticks around year after year. Two banks can hold identical loan portfolios, but if one funds itself with low-cost checking accounts and the other relies on high-rate CDs and wholesale borrowing, their profitability will look completely different. Evaluating the deposit franchise means determining whether the bank has that kind of durable funding advantage.

Start With the Deposit Mix

The composition of a bank's deposits tells you more about funding quality than almost any other single data point. Deposits break into three broad categories:

Non-interest-bearing demand deposits (checking accounts that pay nothing). These are the gold standard because they cost the bank zero in interest expense. A bank where 25% to 35% or more of total deposits are non-interest-bearing has a significant funding advantage.

Interest-bearing demand and savings deposits (including money market accounts). These carry some cost, but it's usually well below market rates because customers value the liquidity and convenience more than the yield.

Time deposits, primarily certificates of deposit (CDs). These have fixed rates and fixed terms, making them the most rate-sensitive and least sticky category. A deposit base heavy in CDs will reprice faster when rates move.

The mix matters because it determines how expensive the bank's funding is and how quickly that cost changes when interest rates shift. A bank with 30% non-interest-bearing deposits and 40% low-rate savings has a fundamentally different cost structure than one with 15% non-interest-bearing and 45% CDs.

Measuring the Funding Cost Advantage

The cost of deposits, calculated as total interest expense on deposits divided by average total deposits, is the most direct way to compare funding costs across banks. Banks with strong deposit franchises consistently report deposit costs well below peer averages and well below prevailing rates on CDs and money market funds.

Deposit beta tells you how sensitive a bank's deposit costs are to changes in market interest rates. It measures how much deposit rates increase for each percentage point increase in the federal funds rate. A bank with a 30% deposit beta only passes along 30 cents of every dollar increase in market rates to its depositors, while a bank with a 70% deposit beta passes along 70 cents. Lower is better, and the gap compounds quickly over a full rate cycle.

To see this in practice, consider two community banks during a period when the Fed raises rates by 2 percentage points. Bank A has a deposit beta of 25% and sees its cost of deposits rise from 0.40% to 0.90%. Bank B has a beta of 60% and sees its cost rise from 0.50% to 1.70%. Bank A's net interest margin (NIM) likely expanded during those hikes, while Bank B's margin was squeezed. That difference in deposit beta is the deposit franchise at work.

Stability, Granularity, and Growth

Not all deposits are equally reliable as a funding source. Regulators and analysts draw a line between "core deposits" and "non-core deposits" because the distinction has real consequences for both liquidity risk and franchise value.

Core deposits (retail checking, savings, and small business accounts) tend to be relationship-based and rate-insensitive. A customer with direct deposit, bill pay, and a debit card tied to their checking account is unlikely to move for an extra quarter point of interest. These deposits are sticky by nature.

Non-core deposits (brokered deposits, large time deposits over $250,000, listing service deposits, and institutional money market accounts) behave differently. They flow to whoever offers the highest rate and can leave quickly. A bank that relies heavily on non-core funding is more vulnerable to deposit flight during periods of stress or competition.

The ratio of core deposits to total deposits is one of the best stability indicators available. Well-funded community and regional banks typically maintain core deposit ratios above 80%. Granularity also matters: a bank with 50,000 accounts averaging $15,000 each is inherently more stable than one with 500 accounts averaging $1.5 million. Large depositors have more options and more incentive to shop around.

Deposit growth trends round out the stability picture. Organic deposit growth that keeps pace with or exceeds loan growth indicates a self-funding bank with a healthy franchise. Declining balances, or a shift from non-interest-bearing to interest-bearing accounts, may signal competitive pressure or customer attrition. The deposits-to-assets ratio (typically 75% to 85% for well-funded banks) shows how much of the balance sheet is deposit-funded versus reliant on wholesale borrowing from sources like the Federal Home Loan Bank (FHLB).

How This Differs Across Bank Types

Community banks often have the strongest deposit franchises relative to their size. They operate in defined geographic markets where personal relationships, branch convenience, and local brand loyalty keep deposit costs low. Many community banks maintain non-interest-bearing deposit ratios above 30% and total deposit costs well below national averages.

Regional banks face more competitive pressure on deposit pricing because they serve larger markets with more alternatives for customers. Their deposit franchises tend to have moderately higher costs but greater scale. Regionals with strong commercial banking relationships can accumulate significant non-interest-bearing operating accounts from business clients, which adds real franchise value.

Large money-center banks benefit from massive scale and payment system integration, but their deposit bases often include significant institutional and rate-sensitive balances. Comparing deposit franchise quality across size categories requires adjusting for these structural differences rather than doing straight cost-of-deposits comparisons.

Signals of Strength and Weakness

When evaluating a deposit franchise, certain patterns stand out as reliable indicators.

Signs of a strong franchise:

Non-interest-bearing deposits above 25% of total deposits

Cost of deposits consistently below peer averages across rate environments

Low deposit beta (under 40%) during rising rate periods

High core deposit ratio (above 80%)

Steady organic deposit growth without aggressive rate promotions

Minimal reliance on brokered deposits

Signs of a weakening franchise:

Declining non-interest-bearing deposit balances as a percentage of total deposits

Deposit costs rising faster than peers, indicating a high deposit beta

Growing dependence on brokered deposits or CD specials to maintain funding levels

Customer attrition evident in declining account counts

Deposits-to-assets ratio falling below 75%, suggesting increased wholesale funding reliance

The Deposit Franchise and Bank Valuation

Deposit franchise quality directly affects what investors will pay for a bank's stock. Banks with superior funding advantages consistently trade at higher price-to-tangible-book-value (P/TBV) multiples because their low-cost deposits generate more earnings from every dollar of equity. Two banks with identical asset portfolios and capital levels can have meaningfully different valuations if one funds itself at 0.50% and the other at 2.00%.

In mergers and acquisitions, the deposit franchise is explicitly priced through the core deposit premium, expressed as a percentage of core deposits. Acquirers have historically paid 5% to 15% (and sometimes more) of core deposits as a premium in bank deals, reflecting the long-term funding value a strong deposit base provides. Premiums tend to be higher when interest rates are elevated, when the deposit base is heavily non-interest-bearing, and when the target bank operates in an attractive market.

For investors evaluating bank stocks, deposit franchise analysis ties everything together. A bank earning a 1.10% return on assets with a funding cost of 0.40% is in a fundamentally different competitive position than one earning 1.10% with a funding cost of 1.50%. The first bank has margin to absorb credit losses, invest in technology, and return capital to shareholders. The second is running on thin margins with little room for error.