Deposit Betas: Why Your Savings Rate Lags Every Fed Move

The Asymmetry Everyone Has Felt

The Federal Reserve raises rates and your credit card APR updates within a statement cycle, while the savings account at a giant bank continues paying a rounding error above zero. The asymmetry is universal, measurable, and central to how banking actually earns money. The measurement is deposit beta, the share of a change in the Fed\'s policy rate that a bank passes through to its depositors. A beta of 1.0 means full pass through, savers get every basis point. A beta of 0.2 means the bank keeps 80 percent of the raise. Across the 2022 to 2023 hiking cycle this site\'s Looking Back series chronicles, cumulative deposit betas at the largest retail banks landed around 0.4 or below on interest bearing accounts, and effectively near zero on ordinary checking and legacy savings, while the online banks covered in our cash parking article ran betas approaching 0.8 and higher.

Why the Lag Is the Business

The mechanism is the core of bank economics this site\'s net interest margin article dissects. Banks earn the spread between what their assets yield, loans and securities that reprice quickly with the market, and what their funding costs, deposits that reprice only when the bank chooses. When the Fed hikes, asset yields rise fast, deposit costs rise slow, and the gap between the two betas flows straight into net interest income, which is why the giant banks reported record spread income through the hiking cycle. The strategic asset being monetized is customer inertia, moving a checking relationship means redirecting paychecks, autopays, and habits, and banks price that switching cost with precision. Notice the cynical elegance of the direction asymmetry too, in cutting cycles deposit rates fall faster than loan books reprice, the beta is high on the way down and low on the way up, heads the spread wins, tails inertia loses.

What 2022 Through 2026 Taught

The recent cycle added three refinements to the textbook. First, technology raised betas structurally, money moves at phone speed now, and the 2023 deposit flight that killed SVB, covered in its own article here, was the violent proof, banks learned that underpaying depositors is safe only until it abruptly is not, and system wide deposit costs rose faster than in past cycles as online competitors and money market funds, paying the full market rate, siphoned balances. Second, the mix shift is the hidden beta, even customers who never chase rates slowly migrated balances from checking into CDs and money funds, raising banks\' funding costs through composition rather than repricing, the industry calls it deposit migration and it continued well after the Fed stopped hiking. Third, the current plateau, with the Fed holding at 3.50 to 3.75 percent through 2026 and the new chair offering no forward guidance, banks are managing betas in the dark, pricing deposits against a rate path nobody will telegraph, which compresses the margin planning this site\'s bank equity coverage relies on.

Using the Concept

Two applications, one personal, one analytical. Personally, deposit beta is a bill you can simply decline to pay, the cash parking article on this site shows the venues running high betas, and moving idle savings is the rare financial act with guaranteed payoff. Analytically, deposit beta is a first order driver of bank valuation, when you read any bank\'s earnings, find the deposit cost line and its trajectory, a bank whose beta stays low while rivals\' rise owns a genuinely sticky franchise, the most valuable asset in banking, while a bank whose deposits reprice fast is renting its funding and will show it in the margin. Analysts model betas explicitly for exactly this reason, and interviewers in any banking seat will assume you can explain the concept in one sentence. The sentence, deposit beta measures how much of the Fed\'s rate a bank shares with its savers, and the gap is the profit.

The Bottom Line

Deposit betas quantify the oldest quiet subsidy in finance, banks reprice assets at market speed and deposits at inertia speed, harvesting the spread from customers who never move. The 2020s sharpened the game, technology and one famous bank run raised the cost of underpaying, migration taxes even the loyal, and a guidance free Fed makes the pricing a nightly gamble. For your own cash the lesson is ten minutes of action, for your analysis of any bank it is the first line worth checking, and for your economics education it is the cleanest example you will ever meet of a price set not by cost but by customer attention.