What is the unemployment rate?

The unemployment rate (officially designated U-3) is the percentage of the civilian labor force that is without a job and has actively looked for work in the past four weeks. Published monthly as part of the Employment Situation report, it is derived from the Current Population Survey (CPS), a household survey of approximately 60,000 households, separate from the establishment survey that produces nonfarm payrolls.

To be counted as unemployed, a person must meet three criteria: they must not have worked during the survey reference week, they must have been available for work, and they must have made specific efforts to find employment in the preceding four weeks. People who have given up looking for work (discouraged workers) are not counted as unemployed. They are considered "not in the labor force," which is why the broader U-6 measure can tell a more complete story.

The U-6 rate includes discouraged workers, marginally attached workers, and those working part-time for economic reasons (people who want full-time work but can only find part-time positions). During recessions, the gap between U-3 and U-6 tends to widen as more workers become marginally attached or are involuntarily underemployed.

The concept of "full employment" is not zero unemployment but rather the rate consistent with stable inflation, often referred to as the NAIRU (Non-Accelerating Inflation Rate of Unemployment). The Fed and Congressional Budget Office estimate NAIRU at roughly 4.0-4.5%, although this shifts over time. When unemployment falls significantly below NAIRU, wage pressures can build and contribute to inflation.

For the Fed, the unemployment rate is central to its dual mandate. Sustained increases in unemployment, particularly when they trigger the Sahm Rule (a 0.5 percentage point rise in the three-month average from its 12-month low), have historically been reliable recession signals. Conversely, a very low unemployment rate can prompt the Fed to maintain or tighten policy to prevent the economy from overheating. The interplay between unemployment and inflation is at the heart of monetary policy decisions.