There's a term used in labor economics and public health for a specific situation that millions of Americans know intimately but may not have a name for: job lock. It describes what happens when a worker cannot afford to leave a job — not because they like it, not because the pay is compelling, but because leaving would mean losing their health insurance or compromising their retirement benefits, and they can't absorb that risk.
A new study from UC Irvine, published in the American Journal of Preventive Medicine, has quantified what job lock is doing to the workers inside it: they are 45 to 52 percent more likely to be injured at work than their counterparts who don't face the same constraints.
What Job Lock Actually Is
Job lock is not a complaint about a job someone doesn't enjoy. It's a specific structural condition: the worker would retire, change jobs, or reduce their hours, but doing so would trigger consequences they can't afford. The most common of these consequences are losing employer-sponsored health insurance and disrupting pension vesting or retirement contributions.
For workers in the 55 to 64 age range — the group the UCI study focused on — job lock is particularly acute. They are typically not yet eligible for Medicare (which begins at 65) and are old enough that purchasing individual health insurance would be prohibitively expensive or practically unavailable at reasonable cost. The result is a large cohort of workers who are physically, financially, and often emotionally ready to change their situation but cannot.
In 2023, 10.9 million Americans were working past age 65 — many of them for the same reasons.
The 45-52% Finding
The researchers analyzed occupational injury data from the Health and Retirement Study, a nationally representative longitudinal survey supported by the National Institute on Aging, covering 2010 through 2022. They compared injury rates across workers in different employment categories — full-time, part-time, partially retired, self-employed — across two age groups: 55 to 64, and 65 and older.
The 55-64 group showed the clearest job lock effect. Workers in this age wave who reported staying in their jobs primarily because of financial or health insurance needs experienced 45 to 52 percent higher injury incidence compared to their peers in the 65-plus wave, where the job lock effect was less pronounced.
Why the difference? Workers who pass 65 and gain Medicare access become freer to reduce hours, change to less demanding roles, or retire outright — and appear to do so. The 55-64 group cannot exercise those options and stays in positions that increasingly exceed their physical capacity or recovery ability.
The Irony: Staying for Insurance Is Raising Your Likelihood of Needing It
This is the cruel arithmetic at the center of the job lock finding. Workers who cannot leave their jobs because they need health insurance are more likely, according to the data, to sustain work-related injuries — which require exactly the health insurance they were staying to preserve.
"Workers facing job lock may have fewer opportunities to recover or adapt to work-related demands," said lead author Matthew McFalls, a postdoctoral scholar at Wen Public Health. "Our findings show a chronic imbalance of resources for our older workforce, and with an estimated 35 million American workers entering the 55 to 64 age range in the next decade, we're looking at thousands of work-related injuries."
The mechanism isn't fully established — the researchers note that more studies are needed — but the plausible pathways are specific. Workers who can't afford downtime don't take it when they're injured. Workers who can't change roles stay in physically demanding positions longer than their bodies can sustain. Workers under financial and health stress have degraded capacity to respond to the physical demands of a job.
Who This Affects
The study's population — workers ages 55 to 64 — is the primary demographic currently entering job lock conditions in large numbers. It is also, as it happens, the demographic for which the phenomenon is hardest to solve at the individual level.
Changing employers might disrupt pension vesting. Reducing hours might eliminate benefits. Starting over in a less physically demanding field often means a pay cut that creates its own financial pressure. The options that might protect a worker's body are frequently also the options that threaten their financial security.
Professor Marizen Ramirez, corresponding author and faculty member at UCI, noted that the findings point toward structural solutions: improving portability of retirement benefits, ensuring health coverage isn't tied to employment status, and avoiding policy changes that raise eligibility ages or reduce access to safety nets — all of which would have the effect of keeping more workers in conditions the study now shows are measurably more dangerous.
Thirty-five million workers are entering the 55-64 age range in the next decade. A significant portion of them will face some version of job lock. The data now says what that means for their bodies.
