topic Re: IRMAA in Get your taxes done using TurboTax

IRMAA

mitchden1 — Wed, 11 Feb 2026 10:30:32 GMT

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.

Re: IRMAA

Bsch4477 — Fri, 20 Sep 2024 21:08:46 GMT

I believe those surcharges are calculated by government actuaries.

Re: IRMAA

mitchden1 — Fri, 20 Sep 2024 22:12:09 GMT

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

Re: IRMAA

DoninGA — Fri, 20 Sep 2024 22:19:41 GMT

@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

Re: IRMAA

mitchden1 — Fri, 20 Sep 2024 22:24:11 GMT

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.

Re: IRMAA

VolvoGirl — Fri, 20 Sep 2024 22:35:52 GMT

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.

Re: IRMAA

VolvoGirl — Fri, 20 Sep 2024 22:37:49 GMT

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

Re: IRMAA

dmertz — Fri, 20 Sep 2024 23:08:15 GMT

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

Re: IRMAA

hung05 — Mon, 08 Dec 2025 19:31:24 GMT

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?

Re: IRMAA

SteamTrain — Mon, 08 Dec 2025 20:41:51 GMT

@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

Re: IRMAA

VolvoGirl — Mon, 08 Dec 2025 20:51:04 GMT

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

Re: IRMAA

VolvoGirl — Mon, 08 Dec 2025 20:56:16 GMT

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