U-6 Underemployment Rate

What Is the U-6 Rate?

The U-6 underemployment rate is the broadest of six labour-utilisation measures the Bureau of Labor Statistics publishes monthly. It includes unemployed persons (the U-3 numerator) plus two additional categories: marginally attached workers (those wanting a job but not searching) and persons employed part-time for economic reasons (those who would prefer full-time work).

The result is a rate that captures more dimensions of labour-market slack than the headline unemployment rate. U-6 is typically 1.5-1.8x the U-3 rate during normal expansions and the multiple widens during recessions.

Why It Matters for Markets

U-6 reveals hidden labour-market slack that U-3 misses. When marginally attached workers and involuntary part-timers re-enter the labour force as the economy strengthens, U-3 can rise even as the labour market improves (because more job-seekers are counted as unemployed). U-6 catches that dynamic directly.

The Fed pays attention to U-6 alongside U-3 because the gap between them signals whether the labour market is genuinely tight or whether there is hidden slack waiting to be absorbed. A tight U-3 with a wide U-6 gap suggests the labour market has more room to run before wage pressures break out; a tight U-3 with a narrow U-6 gap suggests genuine tightness and wage pressure ahead.

How to Read the Print

The U-6 to U-3 ratio. A ratio above 2.0 signals weak labour markets with significant hidden slack. A ratio of 1.5-1.7 is consistent with normal expansions. A ratio below 1.6 indicates extreme tightness.

Marginally attached vs involuntary part-time breakdown. The two components of the U-6 excess over U-3 behave differently. Marginally attached workers respond to labour-market conditions (they return when jobs are easy to find); involuntary part-timers respond to business-cycle dynamics (firms cut hours rather than headcount during slowdowns).

Black-white-Hispanic U-6 disparities. The BLS publishes U-6 by race. Disparities are persistent but cyclical; they widen during recessions and narrow during expansions.

Historical Context

U-6 data go back to 1994. The 2010-2019 average was approximately 12.0%. The post-pandemic recovery brought U-6 to 6.7% in late 2022, the lowest in the data series. Through 2024-2025 it has run in the 7.4-7.8% range — somewhat above the 2022 trough but consistent with normalised tightness.

The U-6-to-U-3 ratio at roughly 1.8-1.9 through 2024-2025 is broadly consistent with the 2010s norm. The Fed has cited the stability of this ratio as evidence that the labour market is in balanced rather than overheated tightness.