If you're an HR or benefits leader, you've probably fielded questions about how smoking and obesity affect healthcare costs. The short answer: both directly raise group health insurance premiums by lifting the actuarial risk of the entire employee pool. Managing that risk well is the first step to improving both employee health and your bottom line.
The Direct Link: Risk, Claims, and Premiums
Health insurance premiums are calculated from the projected medical claims of the covered group. Tobacco use and obesity are two modifiable risk factors tied to the most expensive chronic diseases. Smoking is a leading cause of heart disease, stroke, lung cancer, and COPD, and it cost the United States more than $600 billion in 2018, per the CDC. Obesity raises the risk of type 2 diabetes, hypertension, certain cancers, and joint problems, and the CDC puts its medical cost near $173 billion a year. When these conditions sit in your workforce, they produce higher and more frequent claims for medications, specialist visits, hospitalizations, and procedures. For large, experience-rated groups, insurers read that claims history at renewal and raise premiums to cover the anticipated cost of the group. Small groups, generally 50 or fewer employees and up to 100 in a few states, sit under adjusted community rating, where insurers may vary premiums only by age, family size, geography, and tobacco use, not the group's health history.
GLP-1 Weight-Loss Drugs Are the New Cost Driver
The obesity conversation now includes a second cost channel: the drugs that treat it. GLP-1 agonists such as semaglutide and tirzepatide, developed for diabetes, are now prescribed for weight loss at list prices well above typical maintenance medications. KFF's 2025 Employer Health Benefits Survey found that 19% of firms with 200 or more workers covered GLP-1 drugs for weight loss in their largest health plan, and that share rose to 43% among firms with 5,000 or more workers. The same analysis put 34% of people with employer-sponsored coverage, about 36 million people, in a body mass index range that would medically qualify them for a GLP-1. Coverage hasn't expanded much since: a July 2026 employer survey found about 36% cover GLP-1s for both diabetes and weight loss, unchanged from 2025, while 60% limit coverage to diabetes only. Employers now face two obesity-related cost channels at once: the chronic conditions it causes and the pharmacy claims from treating it. Incentive design has to account for both.
Traditional Approaches: Surcharges and Wellness Programs
Many employers have tried to address these costs through two primary mechanisms:
- Tobacco Surcharges: Permitted under the Affordable Care Act (ACA), employers can charge tobacco users up to 50% more for their health premium contribution, provided they offer a reasonable alternative standard, usually a tobacco cessation program. Several states prohibit or cap tobacco surcharges below the federal maximum. The approach shifts part of the anticipated cost to the individual user.
- Biometric Screening & Wellness Programs: These programs tie financial incentives, such as premium discounts or HSA contributions, to hitting health benchmarks like BMI or cholesterol, or to joining health coaching. They are common, but their effect on sustained health improvement is mixed, and they can raise privacy and employee-perception concerns.
Both approaches often feel punitive to employees and heavy for HR to run, and they create friction without changing the incentive structure of the benefits system itself.
A New Paradigm: Aligning Incentives with Health-to-Wealth
The core challenge of traditional models is that they sit inside a system that pays for treating sickness rather than preventing it. A structural approach, like the one built into the WellthCare ecosystem, fixes that misalignment by turning preventive health actions into automatic wealth building.
Instead of surcharging risk factors, the system creates positive, immediate incentives for healthy behavior. WellthCare, the first Health-to-Wealth™ Benefit System, makes those incentives tangible by rewarding every verified preventive action with Store dollars and automatic retirement contributions, building health and wealth together. That reworks the relationship between health risks and benefits costs in four ways:
- Prevention First: The system tracks and rewards completion of evidence-based preventive actions, from annual physicals and cancer screenings to smoking cessation program participation and nutritional counseling. These actions are tied to a personalized plan of care.
- Instant Gratification Drives Engagement: Employees earn real, spendable dollars at the WellthCare Store™ for completing these actions. That creates a positive feedback loop: healthcare that pays you back. The healthy choice becomes the rewarding choice.
- Long-Term Wealth Building: At the same time, these preventive actions are tied to automatic retirement contributions that compound over time, linking today's healthy behavior to tomorrow's financial security and addressing the long-term consequences of risks like obesity.
- Lowering Claims at the Source: By driving utilization toward $0 co-pay preventive care first, the system helps catch issues early and manage chronic conditions earlier, reducing the high-cost catastrophic claims that drive premium inflation. Healthier employees generate fewer high-cost group claims over time.
Strategic Outcomes for Employers
By shifting from a cost-shifting model to an incentive-aligned model, employers can achieve several key outcomes:
- Proactive Risk Mitigation: You fund activities that reduce future claims rather than accounting only for past ones.
- Improved Culture & Retention: A benefits platform that visibly invests in employees' health and wealth builds goodwill and positions the company as a true partner in their well-being.
- Data-Driven Cost Management: The platform generates real behavior data, which can power tools like the WellthCare Readiness Index™. This allows you to model future savings from deeper ecosystem adoption (like moving to a self-funded plan with aligned pharmacy benefits) based on actual, improved employee health patterns.
Smoking and obesity drive up premiums because they are expensive risk factors. The modern solution rewards employees for mitigating those risks instead of tracking or charging for them. By turning preventive healthcare into automatic wealth, you align employee and employer interests and create a healthier, more cost-effective workforce.
This article is for general information only and is not legal, tax, or medical advice. Employers should consult their own advisors.