ACA vs. Medicare: Which One Should You Choose When You Turn 65?
Should you keep your ACA marketplace plan or switch to Medicare at 65? A San Antonio insurance broker breaks down subsidies, penalties, costs and coverage differences.
If you're approaching 65 and you currently have a Healthcare.gov (ACA) plan, you're facing a fork in the road. The short answer for most people: switch to Medicare. The longer answer depends on your subsidies, your income, and a few other factors that catch San Antonio clients off guard every year.
Why Medicare almost always wins at 65
- Total monthly cost is usually lower. Standard Part B is $185/month in 2026, and Medicare Advantage plans in San Antonio frequently have $0 premium.
- Out-of-pocket maximums on Medicare Advantage are typically lower than ACA Silver or Bronze plans.
- Medicare networks in Texas are broader than most marketplace networks. Many ACA HMOs in Bexar County are narrow.
- You lose your ACA premium subsidy at 65 if you're eligible for Medicare. Keeping an ACA plan often means paying the full premium with no help.
- Most ACA plans don't coordinate with Medicare and won't pay as primary once you're eligible for Medicare.
The Part B late-enrollment penalty
If you don't sign up for Part B during your Initial Enrollment Period and you don't have qualifying employer coverage, you'll pay a 10% Part B premium penalty for every full 12 months you were eligible but didn't enroll — for the rest of your life. An ACA marketplace plan does not count as creditable coverage to avoid this penalty.
The narrow case for keeping an ACA plan
There are a few scenarios in Texas where staying on ACA past 65 can make sense:
- You're not eligible for premium-free Part A (fewer than 40 work quarters) and the Part A premium would be unaffordable.
- You have a much younger spouse on your ACA plan who would lose subsidies if you split coverage.
- You qualify for very large ACA subsidies and your income is unusually low.
Even in these cases the math is delicate — talk to a licensed broker before deciding.
How the transition works in San Antonio
We've helped hundreds of San Antonio residents transition off Healthcare.gov plans. The clean handoff looks like this: enroll in Medicare Part A and Part B to start the first day of your birthday month, pick a Medicare Advantage or Medigap + Part D combination to start the same day, then cancel your ACA plan effective the day before Medicare begins.
Talk to a licensed San Antonio broker — free
No cost, no pressure. We're here to help you compare your options.