看這篇， medicare B是 medicare 月費的大頭

Part B costs for those with higher incomes (IRMAA) (medicareinteractive.org)

 

If you are expected to pay IRMAA, SSA will notify you that you have a higher Part B premium.

Your premium will change based on income as follows:
Your annual income		Your monthly premium in 2023
Individuals	Couples
Equal to or below $97,000	Equal to or below $194,000	$164.90
$97,001 -$123,000	$194,001 – $246,000	$230.80
$123,001 – $153,000	$246,001 – $306,000	$329.70
$153,001 – $183,000	$306,001 – $366,000	$428.60
$183,001 – $499,999	$366,001 – $749,999	$527.50
$500,000 and above	$750,000 and above	$560.50

If you believe you should not pay IRMAA, your circumstances have changed, or your IRMAA was miscalculated, you have the right to request that SSA lower or eliminate your premium increase. You will have to submit evidence whether you are appealing SSA’s original determination or requesting a new determination.