Loan-to-Deposit Ratio
The Loan-to-Deposit Ratio (LDR) measures the proportion of a bank's deposits that have been deployed as loans, providing an indicator of liquidity risk and how aggressively a bank is using its deposit funding base to generate interest income.
Banks fund themselves primarily through deposits (checking, savings, and time deposits from retail and commercial customers) and deploy that funding into loans that earn interest income. The loan-to-deposit ratio divides the total loan portfolio by total deposits and expresses the result as a percentage. A ratio of 80% means $80 of loans exist for every $100 of deposits.
A very low LDR (below 60%) suggests a bank is holding excess deposits in liquid assets rather than deploying them into loans — potentially conservative but leaving return on equity lower than peers. A very high LDR (above 90-100%) suggests the bank is heavily leveraged relative to its stable deposit base and may need to access wholesale funding (brokered deposits, FHLB advances, repo) to fund its loan book — increasing vulnerability to funding market disruptions.
US banking regulators — the OCC, Federal Reserve, and FDIC — do not set a hard LDR limit, unlike some international regulators, but they monitor the ratio as part of the CAMELS examination framework (Capital adequacy, Asset quality, Management, Earnings, Liquidity, Sensitivity). Banks with consistently high LDRs attract closer scrutiny of their liquidity management and contingency funding plans.
During the 2008 financial crisis, banks with high LDRs and heavy reliance on short-term wholesale funding found themselves in acute distress when wholesale markets froze. Post-crisis reforms, including the Liquidity Coverage Ratio and Net Stable Funding Ratio requirements under Basel III, address the funding stability issues that a high LDR can signal.
For equity investors analyzing bank stocks, LDR is a useful quick diagnostic of a bank's growth orientation versus conservatism and its funding structure. Rising LDRs at a bank reporting strong loan growth may signal margin improvement but also requires verifying that deposit growth is keeping pace to avoid funding mismatches.