Why Did My Medigap Premium Increase? Understanding Rating Methods

Medigap premiums can increase for several reasons. Most commonly, increases are due to the specific rating method used by your insurance company: attained-age, issue-age, or community-rated policies. General healthcare cost increases also play a significant role.

Key takeaways

• Medigap premiums can change over time, often due to how your policy is priced: attained-age, issue-age, or community-rated.
• Attained-age rated policies generally see premiums rise as you get older.
• Issue-age rated policies set premiums based on your age when you first enroll. Your age does not cause future increases.
• Community-rated policies charge everyone the same premium, regardless of age.
• Beyond rating methods, factors like inflation, rising healthcare costs, and state regulations can also affect premium increases.

Medicare Supplement Insurance, commonly known as Medigap, helps cover some of the out-of-pocket costs that Original Medicare (Part A and Part B) doesn't pay. These costs can include deductibles, copayments, and coinsurance. While the core benefits of Medigap plans with the same letter designation (such as Plan G) are standardized across insurance companies, the premiums can vary significantly and often change over time.

Understanding why your Medigap premium might increase can help you anticipate costs and make informed decisions about your healthcare coverage. It is important to know the factors involved to better manage your budget.

What are the main Medigap premium rating methods?

Insurance companies use different methods to set Medigap premiums. These methods primarily determine how your age affects the premium you pay. This impact can be felt both when you first enroll and as you get older. The three primary rating methods are attained-age, issue-age, and community-rated.

Attained-Age Rating

Attained-age rated policies are a common type of Medigap policy. With this method, your premium is based on your current age. This means your premiums will generally increase as you get older, reflecting the higher health risks associated with advancing age.

When you first enroll, your premium is typically lower compared to other rating methods. However, it rises incrementally each year, or every few years, to reflect your increasing age. These increases are in addition to any general rate increases that might apply to all policyholders.

For example, if you purchase an attained-age policy at age 65, your premium will be based on that age. As you turn 66, then 67, and so on, your premium will likely increase because you are older. This structure means that while premiums might be attractive when you are younger, they can become more expensive over time.

It's important to consider the long-term cost trajectory when choosing an attained-age policy. The age factor will consistently push premiums higher. This makes long-term financial planning crucial when you have an attained-age policy.

Issue-Age Rating

With issue-age rated policies, sometimes called “entry age” policies, your premium is based on your age when you first purchase the Medigap policy. Once you are enrolled, your age will not be a factor in future premium increases. So, if you buy a policy at age 65, your premium will always reflect that initial age, regardless of how old you become.

While your premium won't increase due to your age, it can still rise for other reasons. General increases due to inflation, rising healthcare costs, or changes in the overall claims experience of the insurance company's policyholders can still lead to premium adjustments. However, the age component of your premium remains stable, offering a predictable element to your costs.

Issue-age policies often start at a higher premium compared to attained-age policies for younger enrollees. However, they can offer more predictable costs as you age. This is because the increases are not tied to your individual aging process. This predictability can be a significant advantage for long-term financial planning, providing a stable age-related cost over time.

Community-Rated (or No-Age-Rated)

Community-rated policies, also known as “no-age-rated” policies, charge everyone the same premium for the same Medigap plan. This applies regardless of their age or health status. Whether you're 65 or 85, you pay the same amount. This method pools all policyholders together, sharing the cost equally across the group.

This method tends to result in higher initial premiums for younger enrollees compared to attained-age policies. However, it offers the most stability regarding age-related increases. Like issue-age policies, community-rated premiums can still increase due to overall healthcare cost inflation, changes in state regulations, or general rate adjustments approved by state insurance departments. Your premium will never increase simply because you've gotten older.

Community-rated policies are currently offered in a limited number of states. These include Arkansas, Connecticut, Massachusetts, Maine, Minnesota, New York, Vermont, and Washington. If you live in one of these states, you may have access to this rating structure. The benefits and premiums of Medigap plans can vary significantly by location and carrier. Always check with providers in your specific area for available options.

What other factors can cause Medigap premiums to rise?

Even if your policy isn't attained-age rated, Medigap premiums can increase for reasons unrelated to your individual age or health. These factors can affect all policyholders, regardless of their specific rating method. Understanding these broader trends is key to understanding your premium changes.

• General Healthcare Inflation: The cost of medical care, services, and supplies tends to rise over time. This overall increase in healthcare expenses often translates into higher premiums for insurance plans, including Medigap. These rising costs are a major driver for premium adjustments.
• Changes in State Regulations: State insurance departments oversee and approve Medigap rate increases. Changes in state laws or regulations can impact the premiums insurers are allowed to charge. For example, new consumer protections or changes in solvency requirements can affect pricing.
• Increased Claims Experience: If the pool of policyholders for a particular plan experiences higher than expected medical claims, the insurance company may need to raise premiums. This is to cover those increased costs. A higher number of claims across the entire group can necessitate a rate adjustment.
• Administrative Costs: The operating expenses of the insurance company, such as marketing, policy administration, and customer service, can also contribute to premium adjustments. These costs are part of doing business and are reflected in premiums.
• Plan-Specific Factors: Although Medigap plans are standardized by letter, specific carriers may experience different cost trends. This can be based on their policyholder demographics, geographic area served, or other internal factors. Each company manages its own risk pool, which influences its rates.

Understanding these factors can help you make sense of why your premium statement might reflect an increase. This is true even if you have an issue-age or community-rated policy. It's a combination of individual policy structure and broader economic and healthcare trends that influences your total cost.

How can I manage or prepare for potential premium increases?

Managing Medigap costs requires proactive planning and a periodic review of your options. Here are several strategies to consider to help keep your premiums in check or find more affordable coverage.

Review Your Policy Annually

Don't just pay your bill without reviewing it carefully. Take time each year to understand any premium changes and why they occurred. Your insurance company typically sends an annual notice detailing any adjustments to your plan or premium. This document will explain the reasons behind any increases.

Shop Around During the Medigap Open Enrollment Period

Your Medigap Open Enrollment Period is generally an ideal opportunity to buy a Medigap policy. This six-month period begins the month you turn 65 and are enrolled in Medicare Part B. During this time, insurance companies must sell you any Medigap policy they offer, regardless of your health conditions. They cannot charge you more due to your health. This is often when you can secure favorable rates and avoid medical underwriting. For more details on this important window, consider reading "Your One-Time Medigap Open Enrollment: Why This 6-Month Window Matters".

Once this special period ends, you might not have the same protections. Switching policies could require medical underwriting in most states. This could potentially lead to higher premiums or even denial of coverage if you have pre-existing health conditions. Learn more about avoiding common pitfalls by reading "Medical Underwriting for Medigap: What Happens When You Switch Later?"

Consider Other Plans

If your current Medigap premium becomes unaffordable, you might consider switching to a different Medigap plan or even switching insurance carriers. For example, moving from a Plan G to a Plan N could lower your premium, but Plan N requires you to pay some copayments for doctor visits and emergency room use. This means a trade-off between premium cost and out-of-pocket expenses.

Remember, outside your Medigap Open Enrollment Period, you may be subject to medical underwriting if you switch. This is unless you qualify for certain protections that allow you to obtain a policy regardless of your health status. You can compare your options and review your overall Medicare costs, including the 2026 standard Part B premium of $202.90 and annual deductible of $283, which are set annually, by visiting Medicare.gov or discussing with a licensed agent. For a deeper dive into your overall Medicare costs, see "[Understanding Your 2026 Medicare Costs: Premiums, Deductibles, and More](/articles/understanding-your-2026-medic are-costs-premiums-deductibles-and-more)"

Check for Discounts

Some insurance companies offer discounts that can help reduce your premium. These can include savings for paying your premium annually rather than monthly, choosing automatic bank withdrawals, or having multiple policies with the same insurer. A household discount, for example, might apply if your spouse also enrolls. Always inquire with your provider about available discounts, as these small savings can add up over time.

What if my state has different rules?

Medigap rules can vary slightly by state. While federal law standardizes the benefits of Medigap plans (e.g., Plan G offers the same core benefits nationwide), states have some flexibility in how they regulate the sale and pricing of these policies. This means that what is available and how it is priced can differ significantly depending on where you live.

For example, some states (like New York and Massachusetts) require insurance companies to offer community-rated plans. This means everyone pays the same premium regardless of age or health status. Other states may have unique open enrollment rules or specific protections that differ from the federal standards. It's always a good idea to check with your State Health Insurance Assistance Program (SHIP) or your state's Department of Insurance for specific rules and regulations that apply where you live. This ensures you have the most accurate and up-to-date information for your location, which can directly impact your Medigap choices and costs.

Action plan

Here are 3-6 numbered steps you can take this week to understand and manage your Medigap premiums:

1. Locate your Medigap policy documents: Find your current Medigap policy and look for details on its rating method (attained-age, issue-age, or community-rated). This information is typically in the policy's summary of benefits or on the first few pages. Knowing your policy's rating method is the first step to understanding future premium trends.
2. Review your annual premium notice: Look for the most recent letter from your Medigap insurer detailing any upcoming premium changes, the effective date, and the reasons for the increase. This notice often arrives a few months before the change takes effect and is your primary source of current information.
3. Contact your insurer with questions: If you don't understand why your premium increased or need clarification on your policy's rating method, call your Medigap insurance company directly. Ask them to explain the specific factors contributing to your premium adjustments in clear terms.
4. Compare plans and providers: Use the official Medicare Plan Finder tool at Medicare.gov to compare available Medigap plans and their estimated premiums in your area. This can help you see if a similar plan with another carrier, or a different plan type, might offer more favorable rates for the same benefits.
5. Contact your State Health Insurance Assistance Program (SHIP): SHIP provides free, unbiased counseling on Medicare-related issues. They can offer personalized advice on Medigap options and premium structures specific to your state. This can be an invaluable resource for local guidance.

Worked example

Eleanor, 72, lives in a state where insurance companies offer primarily attained-age rated Medigap policies. She enrolled in a Medigap Plan G when she turned 65. For the past seven years, Eleanor has noticed her premium slowly but steadily increasing. This year, her annual premium notice showed a larger increase than usual, leading her to wonder if she should switch plans. After reviewing her policy, she confirmed it was indeed attained-age rated, meaning her premiums were designed to increase as she got older. Additionally, her insurer's notice mentioned a general rate adjustment due to rising healthcare costs in the region. Eleanor decided to use the Medicare Plan Finder tool and found that switching to another carrier offering the same Plan G could potentially save her a small amount monthly. However, because her Medigap Open Enrollment Period ended years ago, she would be subject to medical underwriting. Given a recent knee surgery, she was concerned she might be denied or face even higher premiums. Instead, she called her current insurer and inquired about Plan N, which has a lower premium than Plan G but requires small copayments for doctor visits and ER use. After considering her healthcare usage, she decided to keep her Plan G for now, prioritizing its comprehensive coverage, but she made a note to re-evaluate her options next year if the increases continued to be substantial, especially if her health improved or if new state-specific protections to obtain coverage without medical underwriting became available.

Not for you

If you are enrolled in a Medicare Advantage Plan, this article on Medigap premium increases does not apply to you; see your Medicare Advantage plan documents for information on your premium adjustments.

Have questions? Call 1-877-443-3251 to talk it through with a licensed insurance agent. They're paid by the plans they represent, never by you, and the decision stays yours.

We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. Medicare has neither reviewed nor endorsed this information.