Monetary policy is the set of actions a central bank takes to influence interest rates, borrowing costs, and the overall supply of money in the economy. In the United States, the Federal Reserve (commonly called “the Fed”) is responsible for monetary policy, and its decisions ripple through everything from your mortgage rate to the price of groceries. The Federal Reserve Act gives the Fed a specific mandate: promote maximum employment, stable prices, and moderate long-term interest rates.
The Dual Mandate
Although the law lists three goals, the Fed’s job is commonly described as a “dual mandate” focused on two priorities: keeping as many people employed as possible and keeping inflation low and stable. The Fed has defined “stable prices” as an inflation rate of 2 percent per year, measured by the annual change in the price index for personal consumption expenditures (a broad measure of what Americans spend on goods and services).
Maximum employment is harder to pin down. There is no single number the Fed targets. Instead, it looks at a wide range of labor market signals, including the unemployment rate, the number of people working part-time who want full-time jobs, and how many discouraged workers have stopped looking altogether. Because the job market is shaped by forces outside the Fed’s control (demographics, technology, trade patterns), the definition of “maximum employment” shifts over time.
These two goals often pull in opposite directions. Policies that push employment higher can also push prices higher, and policies that cool inflation can slow hiring. Much of what the Fed does involves balancing these tensions.
How the Fed Controls Interest Rates
The Fed’s main lever is the federal funds rate, which is the interest rate banks charge each other for overnight loans. The Federal Open Market Committee (FOMC), a 12-member body within the Fed, meets roughly eight times a year to set a target range for this rate. As of its March 2026 meeting, the FOMC maintained a target range of 3.5 to 3.75 percent.
The federal funds rate matters because it acts as a baseline for borrowing costs across the economy. When the Fed raises its target, banks pass those higher costs along through credit cards, auto loans, mortgages, and business lines of credit. When the Fed lowers its target, borrowing becomes cheaper across the board.
To keep the federal funds rate within its target range, the Fed uses several tools. The most prominent include:
- Open market operations: The Fed buys or sells government securities (like Treasury bonds) to add or drain money from the banking system. Buying securities puts more cash into circulation, which tends to push rates down. Selling securities pulls cash out, pushing rates up.
- Interest on reserve balances: Banks keep reserves at the Fed, and the Fed pays interest on those balances. Adjusting this rate gives the Fed a direct way to influence how much banks are willing to lend versus park at the Fed.
- The discount window: Banks that need short-term cash can borrow directly from the Fed at the discount rate, which serves as a ceiling that prevents the federal funds rate from drifting too high.
- Overnight reverse repurchase agreements: These allow the Fed to temporarily absorb excess cash from money market funds and other institutions, helping to set a floor under short-term interest rates.
Expansionary vs. Contractionary Policy
Monetary policy generally falls into two modes, depending on what the economy needs at a given moment.
Expansionary policy is used when the economy is sluggish, unemployment is rising, and businesses are pulling back. The Fed lowers interest rates to make borrowing cheaper. Cheaper credit encourages consumers to finance homes, cars, and other major purchases, and it encourages businesses to invest in new equipment or hire more workers. The goal is to stimulate spending and pull the economy out of a downturn.
Contractionary policy kicks in when the economy is running hot and inflation is climbing. The Fed raises interest rates, making borrowing more expensive. Higher rates discourage spending on anything typically bought on credit, cooling demand and easing upward pressure on prices. The trade-off is that slower spending can lead to slower job growth or even layoffs.
The effects of either approach are not instant. Changes in interest rates take months to fully work through the economy. A rate cut today might not show up in hiring data for six months or more, which is why the FOMC describes its approach as data-dependent, carefully watching incoming economic numbers before making its next move.
How Monetary Policy Affects You
Even if you never read an FOMC statement, monetary policy shapes your financial life in concrete ways. When the Fed raises rates, you will typically see higher interest charges on credit card balances, more expensive car loans, and rising mortgage rates. Savings accounts and certificates of deposit tend to pay more, though, so savers benefit. When rates fall, borrowing gets cheaper but savings accounts pay less.
Inflation is the other side of the equation. If the Fed keeps rates too low for too long, prices can rise faster than wages, eroding your purchasing power. If it tightens too aggressively, the resulting economic slowdown can mean fewer job openings and smaller raises. The 2 percent inflation target is meant to be a sweet spot: enough price growth to keep the economy moving forward, but not so much that it outpaces household budgets.
Monetary Policy vs. Fiscal Policy
Monetary policy is sometimes confused with fiscal policy, but the two are managed by entirely different institutions using different tools. Monetary policy is set by the Federal Reserve and works through interest rates and the money supply. Fiscal policy is set by Congress and the presidential administration, and it works through government spending and taxation. The Fed plays no role in determining fiscal policy.
Both influence the economy, and they can work in tandem or at cross-purposes. For example, Congress might pass a large spending bill to stimulate growth at the same time the Fed is raising rates to cool inflation. Understanding which institution controls which lever helps you interpret the economic news you hear: a tax cut is fiscal policy, a rate hike is monetary policy, and neither institution can do the other’s job.