Most new retirees are shocked by their first out-of-pocket medical bill. Here is exactly what Medicare leaves out—and your four best options for filling the gaps before they cost you thousands.

The Assumption That Costs Retirees Thousands

For decades, working Americans hear the same thing: when you turn 65, you will have Medicare. And for most people, that sounds like a finish line—the moment when healthcare costs finally stop being a worry.

Then the bills start arriving.

The reality is that Medicare, as comprehensive as it is, was never designed to cover everything. It has significant holes—some of them enormous—that catch retirees completely off guard. Dental work. Hearing aids. Long-term care. Prescription drugs. Overseas medical emergencies. The list of what Medicare does not pay for is long, and the costs that fall through those gaps can add up to thousands of dollars every single year.

According to the Employee Benefit Research Institute, the average retired couple will need an estimated $315,000 in savings just to cover out-of-pocket healthcare costs in retirement—and that figure does not include the cost of long-term care, which Medicare barely touches.

This article breaks down exactly what each part of Medicare covers, where the gaps are, and the four main strategies retirees use to protect themselves. Whether you are newly enrolled, approaching 65, or helping a parent navigate their coverage, this is information you cannot afford to skip.