I will be entering into Medicare July 1, this year. My wife is 62. We're both retiring in July.
My monthly premiums will be $241.68. That covers parts A, B, D, as well as a supplement.
We're shopping for an affordable (affordable for us) plan for my wife. Based upon feedback from some friends in similar circumstances (husband is 65, wife is 62, both recently retired) we anticipate her premiums will be in the range of $350 to $450 monthly.
We just need to get her and us through the next 2.5 years then, she too will enter into Medicare.