According to eHealth Medicare Insurance, the average Medicare Supplement premium in 2022 is $178 per month.  Note that it is difficult to estimate an average cost for a Medicare plan because there are so many variables that can dramatically impact the cost. Whether the company offers insurance rates based on age/gender or not, there are several types of policies, including: Community-rated: The same premium is charged to anyone who is approved for the Medigap policy, regardless of age or gender. Issue-age-related: The premium is based on age when you purchase the policy. Attained-age-related: The premium is based on your age at the present time and goes up as you get older. Other factors that often impact costs include: The type of policy purchased (A, B, C, D, F, G, K, L, M, or N) Whether you are buying the insurance during your Medigap Open Enrollment Period What state you live in Your health condition The type of discounts offered by the company Your age (for some policies)