New research from Vitality puts a number on what unhealthy workforces cost American employers: U.S. workers lose an average of 63.4 productive days each year to poor physical and mental health. The figure comes from Vitality's Global Health and Productivity Index 2026, built with independent research organization RAND Europe from a survey of more than nine thousand workers across five markets. For the Index, a "productive day lost" folds together hours missed through absence and performance dips while at work, converted into full-day equivalents. The study's central finding is that presenteeism dwarfs absence. The full findings are published on Business Wire.

Presenteeism does most of the damage

Only 9.5 of those days come from absence. The rest, 53.9 days, are lost to presenteeism: people showing up physically present but unable to do their best work. That puts presenteeism at 85% of the total health-related productivity loss, according to the report.

The report's authors say employers are mostly measuring the visible part. Absence records are easy to track, so companies watch sick days while presenteeism spreads across the working week, uncounted. About 32% of U.S. workers say their health has a medium or high impact on their productivity while working, and 14% said they missed more than four hours of work in the previous week because of health problems.

Employers pay for treatment, not prevention

On paper the U.S. looks generous: its employers offer a broader range of health and medical support than those in the other markets studied. But the help leans toward treating and managing illness rather than preventing it. While 49% of U.S. workers say they are offered medical or health insurance through work, 51% say they are not, and only 18% report access to employer-organized health screenings that could catch problems while they are easier to treat.

The health burden is heavy: 29% of U.S. workers are classified as obese, well above the five-market average, and 65% report moderate or serious psychological distress. The report points to an opportunity here: identify emerging risks earlier and steer more investment toward prevention. Separate research published this week found that warning signs of chronic pelvic pain can emerge during adolescence, another case for catching health issues young.

AI anxiety is eating workweeks too

Some 56% of U.S. workers say AI or digital tools help them be more productive. But across the five markets, workers with high AI-related concern lost the equivalent of more than five extra working weeks a year compared with workers who reported no such concern. The high-concern group covers 12.9% of workers, and concerns about AI were concentrated among younger, less senior, and already-distressed workers.

The researchers say the rollout matters as much as the tools: companies that think about how they introduce AI, and support the workers most likely to feel anxious about it, stand a better chance of seeing the promised productivity gains. Related research this week found that even brief AI use can wear down people's willingness to stick with hard tasks.

The fixes are unglamorous

The Index names five risk domains tied to productivity loss: mental wellbeing risk, physical health burden, AI-related concern, work strain, and lifestyle risk. They compound: workers at high risk across all five lose close to half a working year, according to the research.

The clearest lever the study found is managerial. Workers who feel their manager genuinely cares about their wellbeing lose nine fewer productive days a year than those who do not. The report concludes that employers get better outcomes against presenteeism by measuring health risks earlier, intervening earlier, backing managers, and aiming health benefits at the people most at risk.

RAND Europe deputy chief executive Christian van Stolk said presenteeism carries the far greater impact when it goes unaddressed, and that recognizing it gives businesses a chance to take a more preventive approach to work. Vitality U.S. CEO Maia Surmava said the scale of the loss should give business leaders pause, and that employers should focus less on sick-day counts and more on whether workers' health lets them perform when they are at work.

The U.S. number looks worse in context, and the gap between sick-day counts and the real total is mostly presenteeism. Poor workforce health costs the U.S. economy an estimated $2.33 trillion in lost productivity a year, the largest total among the five markets studied, and the bill across all five reaches $3.34 trillion. The U.S. figure sits well above the five-market average of 54.8 days and is second only to Germany's 69.3.