Why did my Medicare Supplement premium go up?

It's not because you used your coverage

I hear this worry a lot. Someone has a surgery, and then their premium goes up, and they connect the two. That isn't how Medicare Supplement pricing works. A company can't single you out and raise your rate because you had claims. Increases apply to a whole group of policyholders at once.

A company also can't cancel your Medicare Supplement because of your health. As long as you pay the premium, the policy is guaranteed renewable.

The usual reasons a premium goes up

• Your age. Many policies are priced so the premium goes up as you get older. More on that below.
• Rising health care costs. When doctors, hospitals, and Medicare's own deductibles cost more, the supplement that pays those bills costs more to run.
• The claims of your whole group. If the people in your plan and area use more care than the company expected, the company may raise rates for all of them.
• A discount ended. Some policies start with a new-customer or household discount. When it phases out, your bill goes up even if the base rate didn't.

How your policy is priced

Medicare Supplement policies are priced in one of three ways. Which one you have explains a lot about your increases.

• Attained-age rated. The premium is based on your current age, so it rises as you get older. It often starts lower and climbs.
• Issue-age rated. The premium is based on your age when you bought the policy. It doesn't go up because you age, but it can still go up for inflation and other reasons.
• Community rated. Everyone with the policy pays the same premium regardless of age. It can still rise with costs.

If you don't know which you have, call the company and ask. Ask too what the rate increases have been over the last few years. That history tells you more than this year's letter.

The same letter is the same coverage

Here's something that works in your favor. Medicare Supplement plans are standardized. A Plan G from one company covers exactly what a Plan G from another company covers. The only differences are the price and the company behind it.

That means if your premium has climbed, you can compare the same plan letter at other companies without giving up any benefits. If you want to compare letters too, I wrote about Plan G vs. Plan N.

Switching in North Carolina

This is the part people don't expect. Your guaranteed right to buy any Medicare Supplement, with no health questions, is a one-time six-month window. It starts when you're 65 or older and enrolled in Part B. After that, the NC Department of Insurance says companies can use medical underwriting to decide whether to accept your application.

So if you want to move to a lower-priced company later, you'll usually fill out a health questionnaire. If you're in good health, you may be approved. If you have serious conditions, you may be declined. There are a few special situations where you have a guaranteed right again, such as your plan ending.

That's why the order matters:

• Apply first. Apply for the new policy while keeping your current one.
• Wait for approval. Get the approval and the start date in writing.
• Then cancel. Only cancel the old policy once the new one is active. Never the other way around.

Other ways to lower the bill

• Ask about discounts. Some companies offer a discount for paying by bank draft or for two people in the same household.
• Look at a different plan letter. Some letters cost less each month in exchange for copays or a deductible. Switching letters usually involves health questions too.
• Consider Medicare Advantage carefully. You can move to a Medicare Advantage plan during the fall window, and I explain that on the Annual Enrollment page. Just know that getting a Medicare Supplement back later may require passing underwriting. Read Advantage vs. Medigap before you decide.
• Get free counseling. NC SHIIP counselors don't sell insurance and can help you compare. Call 1-855-408-1212.

If you'd like me to check what the same plan letter costs elsewhere and whether you'd likely be approved, book a free consultation. If staying put is the better move, I'll tell you that.

Sources, checked October 13, 2026: NC Department of Insurance: Medicare supplement plans; Medicare.gov: Choosing a Medigap Policy (official guide, PDF).