“The unemployment rate fell to 3.8% last month.” That single sentence drives stock prices, Fed decisions, and political campaigns. But it’s the answer to a specific question that has a narrower meaning than most people assume. There are actually six different unemployment rates published every month, labeled U-1 through U-6 — and the gap between the narrowest and broadest tells you more about the labor market than the headline alone.
Where the Number Comes From
The unemployment rate isn’t calculated from unemployment-insurance claims. It comes from the Current Population Survey, a monthly phone-and-in-person survey of about 60,000 households conducted by the Census Bureau on behalf of the Bureau of Labor Statistics. Survey staff ask working-age people in each household about their activities during one specific reference week each month.
To be counted as unemployed, a person has to: (1) be 16 or older, (2) not have a job, (3) be available to work, and (4) have actively looked for work in the past four weeks. All four conditions matter.
To be counted in the labor force, you have to be either employed or unemployed by the definition above. The unemployment rate is then unemployed people divided by labor-force participants. People who aren’t in the labor force don’t affect the headline rate at all.
Who Doesn’t Get Counted
- Retirees — not in the labor force, not unemployed
- Full-time students not looking for work
- Stay-at-home parents not looking for paid work
- People who’ve given up looking — classified as “discouraged workers.” Not unemployed by U-3 definition
- People in prison, on active military duty, or institutionalized — not counted in the civilian survey
- People who worked any paid hours, including babysitting or one freelance gig — counted as employed, even if they want more hours
This is why a falling unemployment rate can sometimes coincide with people losing ground — if discouraged workers stop looking, they leave the labor force and the rate ticks down even though no one got hired.
U-1 Through U-6 — Six Rates, Six Definitions
The BLS publishes six alternative measures of labor underutilization every month:
- U-1 — people unemployed 15 weeks or longer, as a share of the civilian labor force. A narrow measure of long-term unemployment
- U-2 — job losers and people who completed temporary jobs, as a share of the labor force. Excludes people who quit or are new entrants
- U-3 — the official unemployment rate. Total unemployed (all reasons) as a share of the labor force. This is the one you see in the news
- U-4 — U-3 plus discouraged workers (people who’ve stopped looking because they don’t believe jobs are available for them). Discouraged workers are added to both the numerator and the denominator
- U-5 — U-4 plus all other “marginally attached” workers (people who want a job and have looked in the past 12 months but not in the past 4 weeks)
- U-6 — U-5 plus part-time workers who want full-time work but can’t get it (“underemployed”). The broadest measure of labor-market slack
U-6 typically runs 3 to 4 percentage points higher than U-3. In a strong labor market like late 2019, U-3 was 3.5% and U-6 was 6.7%. In April 2020, U-3 hit 14.7% and U-6 reached 22.8%. The gap measures how many people are working less than they’d like or have given up — the headline rate misses both groups entirely.
The Labor Force Participation Rate
The other number to watch alongside U-3 is the labor force participation rate — what share of working-age people are in the labor force at all. It rose for decades as women entered the workforce, peaked around 67% in 2000, and has been declining slowly since — partly because the baby boom generation is retiring.
When U-3 falls and participation falls at the same time, the labor market is weaker than it looks — people are dropping out, not finding jobs. When U-3 falls and participation rises, the labor market is genuinely strong — new people are entering the workforce and getting hired. Looking at U-3 alone obscures the difference.
The Establishment Survey — A Separate Number
BLS publishes a second monthly jobs report from the Current Employment Statistics (CES) survey — the “establishment survey” of about 122,000 businesses and government agencies. This is where the headline “nonfarm payrolls” number comes from — “the economy added 187,000 jobs last month.” It’s a count of jobs (positions filled), not people, and it’s a different question from the unemployment rate.
The two surveys can disagree. The household survey (which gives U-3) might show employment falling while the establishment survey (which gives payrolls) shows jobs added. When they diverge, economists generally trust the establishment survey for the level of employment but the household survey for demographics, multiple-jobholders, and self-employed workers.
Why the Fed Watches It
The Federal Reserve has a “dual mandate” from Congress: maximum employment and stable prices. There’s no specific employment target like the 2% inflation target, but the Fed watches unemployment closely as one half of its mission. When unemployment is very low, the Fed worries about wage-driven inflation. When it’s high, the Fed considers lowering interest rates to stimulate hiring.
The concept of “full employment” doesn’t mean zero unemployment — there’s always some “frictional unemployment” from people between jobs. Economists estimate the “natural rate” or “non-accelerating-inflation rate of unemployment” (NAIRU) is somewhere between 3.5% and 4.5% in the modern U.S. economy. Below that range, wage pressures usually start to push prices up.
The Bottom Line
The headline unemployment rate is a useful number, but it’s the answer to a narrower question than most people realize: of the people who say they’re actively looking for work, how many haven’t found any. The fuller picture includes the labor force participation rate (are people even in the market?), U-6 (how many are stuck part-time or have given up?), and the establishment survey’s payrolls number (are jobs being added or lost?). Read together, these tell a richer story than the one number that drives the headlines.