Do You Have to Renew Medicare Supplement Every Year?

No, you do not have to renew a Medicare Supplement policy every year. Medigap plans renew automatically, and federal law classifies every standardized Medicare Supplement policy as “guaranteed renewable.” As long as you keep paying your premiums and stay enrolled in Original Medicare, your insurer cannot drop you, cut your benefits, or refuse to renew you because of your age or your health.¹

Why Renewal Happens Automatically

The automatic renewal is built into federal statute. Under 42 U.S.C. § 1395ss, every Medicare supplement policy must be guaranteed renewable, and the insurer may not cancel or refuse to renew it based on your health.¹ The law allows cancellation on only two grounds: nonpayment of premiums and material misrepresentation on your original application. That is the entire list. An insurer cannot add new conditions at renewal, penalize you for filing claims, or scale back what the policy pays.

Standardization reinforces this. Every plan sold under the same letter (Plan G from one company and Plan G from another, for example) must provide identical benefits, so the only thing that varies between carriers is price.² Because federal design locks the coverage in place, there is nothing for the insurer to quietly change when your policy rolls over. Plan G in year ten covers exactly what Plan G covered in year one.

One narrow exception: in some states, insurers may refuse to renew a Medigap policy purchased before 1992, when the current standardization rules took effect.² If you still hold a pre-1992 policy, check with your state insurance department about your renewal protections.

What You Have To Keep Doing

Automatic renewal is not the same as zero responsibility. Two conditions have to stay true for coverage to continue year after year.

First, pay your premiums on time. Premiums go directly to your private insurer on whatever schedule your contract specifies, whether monthly, quarterly, or annually. If you fall behind and miss the grace period written into your contract, the insurer can cancel.³ Grace periods vary by insurer and by state law, so the exact window is in your policy documents.

Second, stay enrolled in Original Medicare. Medigap is designed to fill the gaps in Parts A and B, and you have to keep both for the supplement to have anything to supplement. Drop Part A or Part B and the Medigap policy ends.³

Of the two, premium payment is what trips people up. A missed quarter, a bounced auto-payment after a bank account change, a forgotten renewal of billing information: any of those can start the clock running.

The Short List of Reasons Coverage Can End

Because the federal statute restricts cancellation so tightly, an insurer’s grounds for dropping you are narrow:¹

Nonpayment of premiums past the grace period. This is the most common reason a Medigap policy ends.
Material misrepresentation on your original application: false information that would have affected the insurer’s decision to issue the policy. The insurer can rescind the contract.
The insurer going out of business. If the company becomes insolvent or exits the market, coverage ends through no fault of your own.³

A couple of other situations end your policy even though the insurer is not technically canceling it. Enrolling in a Medicare Advantage plan makes the Medigap policy unusable, because Medigap cannot pay costs under an Advantage plan.³ And losing Part A or Part B eliminates the underlying coverage, ending the supplement by default.

What is not on the list is just as important. A new diagnosis, a run of expensive hospital stays, or turning 85 give the insurer no right to drop you.

Your Premium Will Still Change

Benefits stay the same at each renewal. Your premium almost certainly will not. Even with guaranteed renewal, costs rise over time due to medical inflation and, depending on how your policy is priced, your age. Three rating methods are in use:⁴

Community-rated. Everyone with the same plan in the same area pays the same premium regardless of age. Rates can still rise for inflation, but not because you got older. These policies tend to start higher and grow more slowly.
Issue-age-rated. Your premium is based on the age you were when you bought the policy. Rates can rise with inflation but not with your birthday. Buying younger locks in a lower starting point.
Attained-age-rated. Your premium is based on your current age and increases as you get older, on top of any inflation-driven increases. These policies often look cheapest at 65 and can become the most expensive over time.

Not every state requires insurers to offer all three methods, so the options available depend on where you live. If your premium is climbing faster than you expected, check whether you have an attained-age-rated policy. That pricing structure virtually guarantees the steepest increases in your 70s and 80s.

When You Might Shop Instead of Just Renewing

Automatic renewal is a protection, not an obligation. Because benefits under the same plan letter are identical from every insurer, comparing Medigap policies is really just comparing prices.² If a different company offers the same Plan G for less, switching gets you identical coverage at a lower cost. An annual price check is worthwhile, especially after several years of premium increases.

The catch is medical underwriting. Your initial Medigap Open Enrollment Period, the six-month window starting the first day of the month you turn 65 and are enrolled in Part B, is the one time you can buy any Medigap policy sold in your state regardless of health.⁵ After that window closes, a new insurer can review your medical history and deny your application, charge you more, or impose a waiting period for pre-existing conditions. If you can pass underwriting, switching can save real money. If you cannot, your current guaranteed renewable policy is your safety net, which is exactly why the federal protection exists.

Guaranteed Issue Rights

Certain situations give you the right to buy a Medigap policy without medical underwriting, even outside the initial open enrollment window. The most common:⁴

Your Medicare Advantage plan leaves Medicare or stops serving your area.
Your employer or retiree group coverage that pays after Medicare terminates.
Your Medigap insurer goes bankrupt.
Trial right as a first-time Advantage enrollee: if you joined Medicare Advantage when you first became eligible at 65, you have 12 months to decide it is not for you and return to Original Medicare with a guaranteed right to buy any Medigap policy in your state.
Trial right after dropping Medigap for Advantage: if you dropped a Medigap policy to try Medicare Advantage for the first time and want to come back within 12 months, you can get your old plan back (if still sold) or buy Plan A, B, C, D, F, G, K, or L.

The Advantage Trap

If you leave Medigap for a Medicare Advantage plan and stay more than 12 months, you may not be able to get any Medigap policy back. Once the trial right window closes, returning to Medigap means going through medical underwriting, with no guarantee you will qualify.⁶ Dropping Medigap at 70 to save money with an Advantage plan can look like a smart move until a health condition at 73 means no insurer will sell you a supplement. The automatic renewal you already have is worth more than it looks.

1
Office of the Law Revision Counsel. 42 U.S. Code 1395ss – Certification of Medicare Supplemental Health Insurance Policies
2
Centers for Medicare & Medicaid Services. Medigap (Medicare Supplement Health Insurance)
3
Medicare. Learn How Medigap Works
4
Medicare. Choosing a Medigap Policy
5
Medicare. When Can I Buy a Medigap Policy?
6
Medicare. Can I Change My Medigap Policy?