CSG Actuarial has compiled the new business rate increases implemented on Medicare Supplement blocks of business since 2011. As discussed on previous CSG Actuarial blog posts, recent increases continue to trend higher as carriers continue to attempt to catch up premium rate levels to the post-Covid claim utilization rates.
The graph below shows an updated view as of May 2025 of the historical average Medicare Supplement new business rate increases by year for key plans F, G, and N, as well as the total for all plans. The year-to-date 2025 new business rate increases are averaging over 10% for all plans combined and over 12% for Plan G.
