KEY POINTS
  • Of Medicare's 63.3 million beneficiaries, about 7% — 4.4 million people — pay so-called income-related adjustment amounts, which translates into paying more for monthly premiums.
  • Those extra charges affect premiums for Part B (outpatient care coverage) and Part D (prescription drug coverage).
  • If you face so-called IRMAAs and your income has dropped, you can ask the Social Security Administration to reconsider.

Some older Americans may be all too familiar with sticker shock when it comes to their Medicare premiums.

That is, instead of paying the standard premium for Part B (outpatient care coverage) and Part D (prescription drug coverage), their income is high enough for monthly "income-related adjustment amounts," or IRMAAs, to kick in. However, the surcharge is typically based on their tax return from two years earlier — which may not accurately reflect their current financial situation.