What Does IRMAA Stand For?

Income-related Monthly Adjustment Amount

The standard Part B premium amount in 2023 is $164.90. Most people pay the standard Part B premium amount. If your modified adjusted gross income as reported on your IRS tax return from 2 years ago is above a certain amount, you'll pay the standard premium amount and an Income Related Monthly Adjustment Amount (IRMAA).

The income-related monthly adjustment amount (IRMAA) is an extra charge added to your premium. It is a sliding scale with a set of statutory percentage-based tables used to adjust Medicare Part B and Part D prescription drug coverage premiums. The higher the beneficiary's range of modified adjusted gross income (MAGI), the higher the IRMAA.

Monthly Medicare Part B and D costs per person in 2023, by income*

SINGLE FILERS	MARRIED, FILING JOINTLY	PART B PREMIUM	PART D SURCHARGE †
Income: $97,000 or less	Income: $194,000 or less	$164.90	​$0
$97,001 - $123,000	$194,001 - $246,000	$230.80	$12.20
$123,001 - $153,000	$246,001 - $306,000	$329.70	$31.50
$153,001 - $183,000	$306,001 - $366,000	$428.60	​$50.70
​$183,001 - $500,000	​$366,001 - $750,000	$527.50	​$70.00
$500,000 and above	$750,000 and above	$560.00	$76.40

*Income determining 2023 premiums is 2021 adjusted gross income plus tax-exempt interest income

†Surcharge is added to the Part D premium, which varies based on the plan

Source: Centers for Medicare and Medicaid Services