How employment status, employer size, and HSAs all affect your Medicare decisions

 

More South Carolinians than ever are working past 65 — and the Medicare rules for people who are still employed are some of the most misunderstood in the entire healthcare system. A wrong decision here doesn't just cost you money today. It can trigger a permanent penalty that follows you for the rest of your life.

Whether you work for a large company, a small local business, or are self-employed, the rules are different — and the stakes are real. Here's what Lexington and Midlands SC residents need to understand before making any Medicare decisions while still employed.

 

The Most Important Question: How Big Is Your Employer?

The number of employees your employer has is the single most important factor in determining your Medicare options while still working. It determines who pays first, whether you can delay enrollment without penalty, and what happens to your coverage if you don't act correctly.

20 or more employees: Your employer's group health plan pays first. Medicare pays second. You can delay enrolling in Medicare Part B — and Part D — without a late penalty, as long as you're covered under the employer plan. You may still want to enroll in Part A (hospital coverage), which is free for most people.

Fewer than 20 employees: Medicare becomes your primary insurer at 65 — whether you enroll or not. If you don't enroll, your employer plan may pay almost nothing because Medicare hasn't paid first. This is one of the most common and costly mistakes we see from SC workers. Enroll in Medicare Parts A and B during your 7-month Initial Enrollment Period around your 65th birthday.

Self-employed: If you're buying your own health insurance — through the ACA marketplace or directly from a carrier — that coverage generally doesn't qualify as employer group coverage for Medicare delay purposes. You should enroll in Medicare at 65 to avoid the late enrollment penalty.

 

The permanent Part B late enrollment penalty is 10% for every 12-month period you were eligible but didn't enroll — added to your premium for life.

 

The 8-Month Special Enrollment Period

When you eventually stop working or lose your employer group health coverage — whichever comes first — you have an 8-month Special Enrollment Period to sign up for Medicare Part B without penalty. This window starts the month after your employment or coverage ends.

The most common mistake is waiting until COBRA runs out. COBRA is not considered qualifying employer coverage for Medicare purposes. Your 8-month clock starts when your active employment ends — not when COBRA ends. If you take COBRA and delay Medicare enrollment, you may miss your penalty-free window entirely.

 

The HSA Trap

If you have a Health Savings Account and are still contributing to it, you need to stop at least 6 months before you plan to enroll in Medicare or apply for Social Security. Once you enroll in any part of Medicare — including Part A — you can no longer contribute to an HSA. And Medicare Part A enrollment can be backdated up to 6 months when you apply for Social Security, which means contributions made during that period may be penalized.

This catches a lot of working South Carolinians off guard. Talk to a Medicare agent and your tax advisor before making any changes to your enrollment timing if you have an HSA.

 

Why MIG Is the Right Agency for This Situation

Working past 65 is unique because it sits at the intersection of employer coverage and Medicare — two very different insurance worlds. Most Medicare-only agencies can only help with half of the picture. At Mauldin Insurance Group, Ben handles employer and group coverage and Jennifer handles Medicare, which means we can look at your complete situation from both sides and help you make the right call without guessing.

Our guidance is free. We're licensed in South Carolina, North Carolina, and Georgia, and we serve clients across the Midlands — Lexington, Columbia, Irmo, Chapin, Cayce, and West Columbia.

 

📖 Full Guide: Working Past 65 in South Carolina: Your Full Medicare Options Guide midlandsmedicare.com/working-past-65-south-carolina Our complete guide covers all four scenarios — large employer, small employer, spouse's coverage, and self-employed — plus the HSA rules, the 8-month SEP, a pre-65 checklist, and answers to the most common questions.

 

📖 Full Guide: Working Past 65 — Statewide SC Medicare Guide southcarolinamedicareagency.com/working-past-65-south-carolina The same complete guide for South Carolina residents statewide — including all enrollment rules, employer size scenarios, and a direct line to Jennifer Mauldin for a free consultation.

 

Still working at 65? Call Jennifer for a free 15-minute review — we'll make sure you don't make a costly mistake. Call or text: (843) 509-2462 mauldininsurancegroup.com/health-insurance