Medicare Supplement costs vary widely based on your age, location, and the plan you choose

Medicare Supplement insurance (also called Medigap) covers costs that Original Medicare leaves you responsible for — copayments, coinsurance, and deductibles. The monthly premium you pay depends on three main factors: which plan letter you select (Plan A through Plan N have different coverage levels), your age when you first buy the policy, and your state of residence. There is no single price; a Plan G might cost $120 a month in one state and $180 in another, and the same plan costs more at age 75 than at age 65.

Insurance companies set their own rates within state regulations, so comparing quotes from multiple insurers is the only way to find what you will actually pay. Some people pay $80 monthly; others pay $250 or more. The price you lock in at age 65 (if you buy then) typically stays lower than if you wait and buy at 70, because most insurers use age-based pricing that increases each year.

Key Takeaways

  • Medicare Supplement premiums range from roughly $80 to $250 per month depending on the plan, your age, and your state, with no national standard price.
  • Plan G and Plan N are the most common choices for people newly may be able to access for Medicare, and their costs differ by state and insurance company.
  • Buying a Medigap policy at 65 (during your initial enrollment window) usually locks in a lower rate than waiting until 70 or older.
  • You can switch plans or insurers during the annual open enrollment period (October 15 to December 7), though some insurers may charge more if you have health conditions.

How insurance companies price Medicare Supplement plans

Three pricing methods exist, and the one your insurer uses affects how much your premium rises over time. Community rating means everyone in your state pays the same price regardless of age — the cheapest option upfront but premiums rise faster each year. Issue-age rating bases your rate on your age when you buy the policy; a 65-year-old and a 75-year-old pay different amounts, but each person's rate increases modestly year to year. Attained-age rating means your premium rises as you age, so a policy that costs $100 at 65 might cost $180 at 80.

Most insurers use issue-age or attained-age rating. Your state may restrict which method companies can use, so the same plan from the same insurer costs different amounts in different states. This is why calling three or four insurers for quotes is essential — the difference between the cheapest and most expensive option for the same plan can be $50 to $100 monthly.

Plan costs by coverage level

Plans with richer coverage cost more. Plan A is the least expensive because it covers fewer gaps in Original Medicare. Plan G costs more than Plan A but covers more of your out-of-pocket costs. Plan N falls between them. Plan F (the most comprehensive) is no longer sold to people new to Medicare as of 2020, though people who already had it can keep it.

A rough comparison in many states: Plan A might run $100 to $140 monthly, Plan G might run $140 to $200 monthly, and Plan N might run $120 to $170 monthly. These are examples only — your actual quotes will depend on your insurer and state. The trade-off is straightforward: you pay more monthly for a plan with higher coverage, but you pay less out of pocket when you use medical services. Someone who visits doctors frequently may save money overall with Plan G despite the higher premium, while someone with few medical needs might prefer Plan A's lower cost.

Age and enrollment timing affect your rate

The age you buy a Medigap policy matters significantly. If you buy at 65 (during the six-month window when you first become may be able to access for Medicare Part B), insurers cannot charge you more because of health conditions — this is called may provide issue. If you wait and buy at 70, some insurers will charge you more or deny you coverage based on your health history, even though federal law protects you in certain situations.

The rate you pay at 65 typically stays lower than the rate someone else pays if they buy the same plan at 70, because your starting point is lower. Over 15 years, buying early can save thousands of dollars even if you never use the coverage heavily. If you miss your initial enrollment window, you can still buy Medigap during the annual open enrollment period (October 15 to December 7), but you may face higher rates or medical underwriting depending on your state and insurer.

State-by-state variation in premiums

Your state sets the rules for how insurers can price Medigap policies, which is why the same plan costs different amounts in different places. Florida, California, and New York have large senior populations and many insurers competing, which sometimes drives prices down. Rural states with fewer insurers may have higher premiums. Some states regulate rates more strictly than others.

You can see rough price ranges by visiting your state's insurance commissioner's office website — many publish Medigap rate comparison tools. These tools show what different insurers charge for each plan in your area, updated quarterly or annually. This is the most reliable way to see what you will actually pay before you contact an insurer directly.

What is included in the premium and what is not

Your Medigap premium covers only the insurance policy itself. It does not cover your Part B premium (which you pay to Medicare), your Part D prescription drug coverage (a separate policy), or your Part A premium (usually $0 if you or your spouse paid Medicare taxes for 10 years). If you choose Original Medicare plus Medigap, you are responsible for all three of those costs separately.

Some people confuse Medigap with Medicare Advantage (Part C), which is a different type of coverage run by private insurers. Medicare Advantage has its own premiums and rules. If you have Medigap, you cannot have Medicare Advantage at the same time, and the costs work differently — Medicare Advantage often has $0 premiums but higher copayments and network restrictions.

How to compare costs and find current rates

Call insurers directly or visit their websites to request quotes for the specific plan you are interested in. Have your date of birth, state of residence, and Medicare number ready. Most insurers will quote you over the phone or online within minutes. Write down the monthly premium, the plan letter, and the effective date.

Compare at least three insurers. The same Plan G from Company A might cost $150 monthly while Company B charges $180 for identical coverage. Over a year, that is a $360 difference. Your state insurance commissioner's office may also have a rate comparison tool that shows what multiple insurers charge in your area — this is a faster way to narrow down which companies to call.

If you are currently in a Medigap policy, you can switch to a different plan or insurer during the annual open enrollment period without medical underwriting in most states. Outside that window, some insurers will ask health questions before covering you. Knowing your options before open enrollment arrives means you can act quickly if you find a better rate.

Frequently Asked Questions

Does Medicare Supplement cost the same everywhere?

No. The same plan from the same insurer costs different amounts in different states because each state sets its own insurance regulations. Plan G might cost $160 in one state and $210 in another. This is why comparing quotes in your specific state is the only way to know what you will pay.

What happens to my Medigap premium as I get older?

It depends on your insurer's pricing method. With attained-age rating (most common), your premium increases each year as you age. With issue-age rating, your premium is based on your age when you buy the policy and increases more slowly. Community rating means your age does not affect your rate, but everyone's premiums rise together each year.

Can I switch Medigap plans if my premium gets too high?

Yes, during the annual open enrollment period (October 15 to December 7) you can switch to a different plan or insurer without medical underwriting in most states. Outside this window, some insurers will ask health questions. If you switch plans with the same insurer, the process is usually simpler than switching to a new company.

Is there a way to lower my Medigap costs?

Comparing quotes from multiple insurers is the most direct way — rates vary significantly. Some insurers offer discounts for paying annually instead of monthly, or for setting up automatic payments. You can also switch to a less comprehensive plan (like Plan A instead of Plan G) to lower your premium, though you will pay more out of pocket for medical services.

What if I cannot afford a Medigap premium?

Some states offer programs that help low-income seniors pay Medigap premiums — ask your state Medicaid office or your State Health Insurance information Program (SHIP). You can also choose Medicare Advantage instead, which often has lower or no premiums, though it has different cost structures and network rules. Your local SHIP office can help you compare both options.