Discount Rate

The discount rate is the interest rate a central bank charges when it lends money to commercial banks — typically for short-term emergency needs. It is one of the oldest and most powerful tools of monetary policy, sometimes called the “lender-of-last-resort rate” because central banks use it to prevent banking panics.

The simplest lever of monetary policy

The discount rate operates like a thermostat for the banking system. When a bank runs short of cash at the end of the day or faces unexpected loan defaults, it can borrow from the central bank’s “discount window” at the discount rate. This borrowing is safe and routine, a normal feature of banking. But the rate itself sends a signal: when the central bank raises the discount rate, it makes emergency borrowing more expensive, discouraging banks from loose lending practices. When it lowers the rate, it makes borrowing cheaper and easier, encouraging banks to lend and fueling economic activity.

How it differs from the federal funds rate

The Federal Reserve controls two headline interest rates. The federal funds rate is the rate at which banks lend to each other overnight to meet their reserve requirements. The discount rate is the rate at which the Fed lends to banks directly. The Fed typically sets the discount rate well above the federal funds rate — historically 1 to 1.5 percentage points higher. This gap discourages banks from borrowing directly from the Fed unless they truly need to, preserving the federal funds rate as the binding overnight rate. If the discount rate were lower, banks would borrow from the Fed instead of from each other, and the Fed would lose control of the overnight market.

The discount window as a safety valve

During normal times, the discount window is a quiet corner of central banking. Banks rarely borrow from it. But in a crisis, the discount window becomes critical. During the 2008 financial crisis, the Federal Reserve cut the discount rate and loosened the terms for borrowing — banks could pledge lower-quality collateral, borrow for longer periods, and access larger amounts. This flood of Fed lending was essential to preventing a complete freeze of the financial system. Similar measures were deployed in March 2020 when the COVID-19 pandemic hit.

Psychological power: the stigma of the discount window

There is a strange paradox to the discount window: even when the Fed makes borrowing easier and cheaper, banks are reluctant to use it. This reluctance is rooted in the stigma of being seen as desperate. When a bank borrows from the discount window, other market participants may interpret it as a sign of financial weakness. This perception, even if unfounded, can trigger a run on the bank — depositors withdraw funds, and suddenly the bank really is in trouble. To combat this stigma, central banks have at times renamed their discount window programs with more neutral language. The Fed’s “Primary Credit Facility” sounds less ominous than “emergency lending.”

Reserve requirements and the discount rate

The discount rate is intimately tied to reserve requirements — the percentage of deposits that banks must hold on hand. When the central bank lowers reserve requirements, banks are free to lend out more money, boosting the money supply. When it raises reserve requirements, banks must hold more in reserve, shrinking the money supply. The discount rate complements this mechanism: a lower discount rate makes it easier for banks to borrow reserves if they fall short, encouraging lending even if reserve requirements are strict.

Limits of the discount rate as policy

The discount rate is powerful but not unlimited. If a central bank lowers the discount rate dramatically but banks are already holding plenty of excess reserves, they have no reason to borrow more. And if a bank is truly insolvent — liabilities exceed assets — no amount of cheap borrowing will help; the bank needs capital, not a short-term loan. This is why in deep recessions, central banks must eventually resort to quantitative easing (buying assets directly) or to forward guidance (promising to keep rates low for years to come). The discount rate works best when the problem is temporary liquidity, not permanent insolvency.