Why Banks Care About Deposits

How It Works

Banks need money to lend money. They get that money from two sources: customer deposits and wholesale funding markets. Customer deposits are dramatically cheaper. When customers leave money in a checking account earning 0.01%, the bank is essentially borrowing money at near-zero cost. In the wholesale market — borrowing from other banks, issuing bonds, or taking Fed loans — the bank pays market rates, which fluctuate with interest rate conditions and can be significantly higher.

The gap between deposit funding costs and wholesale funding costs is the hidden subsidy that makes banking extraordinarily profitable in normal times. A bank that funds itself with $500 billion in low-cost retail deposits has a structural advantage over a competitor that must fund itself at market rates. This is why acquiring deposits — through branches, marketing, interest rates, and services — is the central strategic priority for most retail banks.

When banks lose deposits, the consequences cascade. The bank must replace that funding at higher cost, compressing margins. If deposit outflows are large or fast, the bank may struggle to fund existing loan commitments. In extreme cases, rapid deposit outflows — bank runs — can push an otherwise solvent bank into insolvency because it cannot liquidate long-term loans fast enough to meet immediate withdrawal demands.

This is why the banking industry treats deposit competition — whether from money market funds, Treasury direct accounts, or yield-bearing stablecoins — as an existential threat rather than normal market competition. Deposits are not just one product; they are the raw material for the entire business.

Why It Matters

The entire regulatory battle over digital finance comes down to deposits. Banks are not fighting stablecoins, DeFi, or blockchain technology because they are inherently dangerous. They are fighting because they see these technologies as vehicles through which consumers might finally discover that keeping idle cash in a 0.01% checking account is a raw deal.

The moment consumers have a convenient, regulated, dollar-stable alternative that pays 4% — they will move their money. This is rational behavior that banks cannot compete with without fundamentally restructuring their cost bases. Their response — lobbying against the competition rather than innovating to match it — reveals that the banking industry's real preference is regulatory protection over market competition.

Real-World Example

In 2022 and 2023, as the Federal Reserve raised interest rates dramatically, consumers began noticing that money market funds and Treasury bills were paying 4 to 5% while their banks paid essentially nothing. This triggered a slow-motion deposit migration: consumers moved money from bank accounts into money market funds, directly buying T-bills, or into high-yield savings accounts at online banks. Traditional banks lost hundreds of billions in deposits during this period. A regulated yield-bearing stablecoin would accelerate this migration dramatically.