20 CFR § 418.1125 - How will the income-related monthly adjustment amount affect your total Medicare Part B premium?

---
identifier: "/us/cfr/t20/s418.1125"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "20 CFR § 418.1125 - How will the income-related monthly adjustment amount affect your total Medicare Part B premium?"
title_number: 20
title_name: "Employees' Benefits"
section_number: "418.1125"
section_name: "How will the income-related monthly adjustment amount affect your total Medicare Part B premium?"
chapter_name: "SOCIAL SECURITY ADMINISTRATION"
part_number: "418"
part_name: "MEDICARE SUBSIDIES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
regulatory_source: "70 FR 77675, Dec. 30, 2005, unless otherwise noted."
cfr_part: "418"
---


# 418.1125 How will the income-related monthly adjustment amount affect your total Medicare Part B premium?

(a) If you must pay an income-related monthly adjustment amount, your total Medicare Part B premium will be the sum of:

(1) The Medicare Part B standard monthly premium, determined using the rules in 42 CFR 408.20; plus

(2) Any applicable increase in the Medicare Part B standard monthly premium as described in 42 CFR 408.22; plus

(3) Your income-related monthly adjustment amount.

(b) The nonstandard Medicare Part B premium amount described in 42 CFR 408.20 does not apply to individuals who must pay an income-related monthly adjustment amount. Such individuals must pay the full Medicare Part B standard monthly premium plus any applicable penalties for late enrollment or reenrollment plus the income-related adjustment.

[71 FR 62931, Oct. 27, 2006, as amended at 78 FR 57260, Sept. 18, 2013]