Why sign in to the Community?

  • Submit a question
  • Check your notifications
Sign in to the Community or Sign in to TurboTax and start working on your taxes
Level 3
posted Sep 20, 2024 1:38:04 PM

IRMAA

I know that MAGI determines how much IRMAA I have to pay. For Part D, the first IRMAA bracket for 2024 is an additional $12.90 per month. How is the $12.90 calculated and what are  the calculations for all the IRMAA brackets? I'm not referring to the MAGI brackets.

 

0 11 4615
1 Best answer
Level 15
Sep 20, 2024 4:08:15 PM

20 CFR § 418.1120 - How do we determine your income-related monthly adjustment amount?

https://www.law.cornell.edu/cfr/text/20/418.1120

 

20 CFR § 418.1115 - What are the modified adjusted gross income ranges?

https://www.law.cornell.edu/cfr/text/20/418.1115

11 Replies
Level 15
Sep 20, 2024 2:08:46 PM

I believe those surcharges are calculated by government actuaries. 

Level 3
Sep 20, 2024 3:12:09 PM

I remember reading that each IRMAA level premium is a percentage of a base. I'd like to know the percentages for each level.

Level 15
Sep 20, 2024 3:19:41 PM


@mitchden1 wrote:

I remember reading that each IRMAA level premium is a percentage of a base. I'd like to know the percentages for each level.


Go to this SSA website for information - https://www.ssa.gov/forms/ssa-44.pdf

Level 3
Sep 20, 2024 3:24:11 PM

Thank you but that site only provides the additional premium for each bracket. I'm hoping to find the basis of each amount. For instance, $12.90 additional premium for Part D is probable a percentage increase from a base. I'd like to know what that base is.

Level 15
Sep 20, 2024 3:35:52 PM

I don’t think it is any percentage.  It’s just a fixed amount based on the prior year MAGI.  That table should cover it.  

Level 15
Sep 20, 2024 3:37:49 PM

Oh the base would be zero.  MAGI under the table would have no extra IRMAA amount.  

Level 15
Sep 20, 2024 4:08:15 PM

20 CFR § 418.1120 - How do we determine your income-related monthly adjustment amount?

https://www.law.cornell.edu/cfr/text/20/418.1120

 

20 CFR § 418.1115 - What are the modified adjusted gross income ranges?

https://www.law.cornell.edu/cfr/text/20/418.1115

Level 2
Dec 8, 2025 11:31:24 AM

Please correct my number of IRMAA/MAGI

In TurboTax after entering all incomes TurboTax will list out all incomes and Total. Is this Total equal to IRMAA/ MGAI? I used Excel to list out all incomes it turns out very close to this TurboTax number. I believe My Excel Speadsheet was round off to be quick list.

Can someone shine the idea?

Level 15
Dec 8, 2025 12:36:20 PM

@hung05 

 

Your MAGI for IRMAA purposes comes from your 2024 form 1040.....line 11 PLUS line 2a.

 

For 2026 IRMAA that will be from the form 1040 that you filed for 2024 .  (if 2024 filed too late, they might use 2023)

_______________________________

 

Second table for PArt B coverage on this page (part D amounts further down the page)

2026 Medicare Parts A & B Premiums and Deductibles | CMS

Level 15
Dec 8, 2025 12:51:04 PM

@hung05  I got my SS letter last week showing my new 2026 Social Security payments and IRMAA amounts.....

 

SS IRMAA.jpg

Level 15
Dec 8, 2025 12:56:16 PM

Oh and the IRMAA deductions are on top of the standard Medicare premium $202.90.