Turning 65 changes your healthcare options for both you and your employer. If you're still working, you need to understand how employer coverage and Medicare fit together. Employers, meanwhile, have a chance to control costs by managing this population well. The traditional process is messy, but newer benefit designs turn this life event from a cost headache into a real opportunity for savings and better health.
The Standard Rules: Coordination of Benefits
When you turn 65 and keep working, you have options. If your employer has 20 or more employees, your group health plan pays first and Medicare is secondary, so you can delay Part B without a late penalty while that coverage is in place. Once the employment or that coverage ends, you get an 8-month Special Enrollment Period to sign up for Part B penalty-free. Miss that window and the penalty is 10% of the standard Part B premium for each full 12-month period you could have had Part B but did not, charged for as long as you keep Part B. Part A is usually free for anyone whose own work history, or a spouse's, reaches 40 quarters (10 years), so most workers sign up for it at 65 even while employed. For employers with fewer than 20 employees, Medicare becomes primary. Talk to your HR department and a Medicare specialist to avoid coverage gaps or late penalties.
The Employer's Challenge and Opportunity
Employees over 65 drive a big chunk of healthcare spending. Per person, Americans 65 and older generated $22,356 in personal health care spending in 2020, almost 2.5 times the $9,154 for working-age adults, according to CMS. Under a traditional plan, these high-cost lives push up premiums and claims. The default approach is passive: let employees figure out Medicare on their own, with little support. That misses a key cost lever: managing the Medicare transition instead of leaving it to chance. Retirees who move onto a well-designed Medicare plan stop generating claims on the employer plan, which cuts risk and lowers costs fast. Still-working 65-plus employees are a different case, and the law sets firm limits on what an employer can do with them.
What Employers Can and Can't Do
Employers with 20 or more employees cannot force active 65-plus workers off the group health plan. Under the Medicare Secondary Payer rules (42 U.S.C. §1395y(b)), the plan stays primary for those workers, and the employer cannot offer financial or other incentives to get them to decline or drop it. Paying a Medicare-eligible employee to opt out is a prohibited incentive, and an employer that does it faces civil penalties.
The lever works differently for retirees. Once an employee leaves active employment, the employer can reshape that coverage. Many employers steer retirees into a Medicare Advantage Employer Group Waiver Plan (EGWP), a group plan private insurers run under CMS waiver authority. About 5 million Medicare Advantage enrollees get coverage through an EGWP, and the Urban Institute reports those plans can save employers money. New York City's plan to move its retirees into an EGWP was projected to save $600 million a year, and opponents sued to block the change.
The realistic playbook runs on two tracks. Keep active 65-plus workers on the group plan with no pressure to leave, and build a strong EGWP or coordinated Medicare path for the day they retire. That respects the law and still captures most of the savings.
A Modern, Integrated Approach: The Health-to-Wealth™ Benefit System
Forward-thinking companies now use integrated benefit ecosystems that turn the Medicare transition into a win-win. WellthCare™ is a zero-net-cost benefit system that rewards employees for verified preventive actions with reward dollars at the WellthCare Store™ and automatic retirement savings, while reducing employer healthcare costs without disruption. The WellthCare model is one example of a structured, data-driven pathway:
- Early Integration: Employees join a preventive health platform before age 65, building habits and earning rewards.
- Data-Driven Identification: A proprietary Readiness Index™ analyzes real usage and eligibility data to show employers when and how much they would save by moving eligible retirees to Medicare.
- Coordinated Transition: Eligible retirees move onto a dedicated Medicare plan that fits into the same system. They keep their rewards and benefit continuity.
- Cost Removal & Risk Reduction: The employer plan sheds its highest-cost claimants, saving money directly, while those retirees get coverage designed for their life stage.
Key Benefits of an Integrated System
- For the Employee: A guided transition with no benefit loss; continued preventive-care rewards; often better, more affordable coverage.
- For the Employer: Lower healthcare spend; reduced risk on the self-funded plan; better plan metrics; visible care for employee well-being.
- For the Long Term: A lifelong relationship through retirement, with aligned pharmacy, supplemental benefits, and care management.
Actionable Steps for HR and Benefits Leaders
If you run a benefits program, addressing the over-65 population is smart strategy. Start by auditing your workforce demographics to see how many people are in this group, and split the list between active workers and retirees, because the rules treat them differently. Then check your vendors: do they offer a coordinated Medicare transition, or a disjointed handoff? Look for solutions that prove savings with your own data, not promises, and that prioritize the employee experience to keep participation high. Done well, Medicare becomes a natural, positive next step in your benefits continuum.
Healthcare benefits for people over 65 don't have to be confusing. With strategic design and integrated technology, the transition can become one of your most powerful levers for reducing costs while building employee health and wealth together.
This article is for general information only and is not legal, tax, or medical advice. Employers should consult their own advisors.