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2027 IRMAA Brackets: Projected Thresholds + the SSA-44 Appeal Path

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The two-year lookback, explained plainlyProjected 2027 thresholds (not yet official)If your 2025 income doesn’t reflect your current situationSources

Updated October 9, 2026. Quick answer. One 2027 IRMAA threshold is already certain: the top tier is set by statute at $500,000 for single filers and $750,000 for joint filers and is not inflation-adjusted for 2027 (42 U.S.C. §1395r(i)(3)(C) and (i)(5)(C); indexing of that tier begins in 2028). The other four dollar thresholds aren’t announced until around November 2026, but whether YOUR income will trigger a surcharge, and roughly which tier, is already knowable: your 2027 IRMAA surcharge, if any, is based on your 2025 tax return, income that is already fixed and on file, because the income year that decides it (2025) is already closed.

Related figures and codes: 529 Five-Year Election Limit 2027, ABLE Account Contribution Limit 2027 and AMT Exemption 2027.

The two-year lookback, explained plainly

Medicare premiums are never based on the current year’s income — the IRS hasn’t finished processing current-year returns when premiums are set. Instead, your 2027 premium is based on your Modified Adjusted Gross Income from the tax return you filed in spring 2026 covering tax year 2025. If 2025 was a high-income year (a large capital gain, a big Roth conversion, a final year of full salary before retiring), that income — even if your income has since dropped — is what sets your 2027 premium.

The two-year IRMAA lookback: how 2025 income sets a 2027 Medicare premiumA calendar timeline running from January 2025 to January 2028. The 2025 tax year is the income year that decides the premium; the return covering it is filed in spring 2026; CMS announces the official 2027 thresholds in the first half of November 2026; the 2027 premium year then runs for twelve months. The gap between the start of the income year and the start of the premium year is 2 years.The two-year lookbackhow 2025 income sets a 2027 premium2025 · the income yearspring 2026 · you file itNov 2026 · CMS announces2027 · the premium year2 yearsJan 2025Jan 2026Jan 2027Jan 2028Clear Money Guide · CC BY 4.0
The income that decides your 2027 premium is already behind you. The band on the left is the tax year that sets the surcharge; the band on the right is the year you pay it. Between them sit the two moments you can still act around: the return filed in spring 2026, and the official threshold announcement in the first half of November 2026. Those two are drawn as windows rather than single dates because that is the precision the calendar actually supports — “spring” and “the first half of November” are as sharp as those dates get until CMS publishes. The practical consequence is the one this page opens with: because 2025 is closed, whether you will owe a surcharge is already knowable, even though the dollar thresholds are not. CC BY 4.0.

Projected 2027 thresholds (not yet official)

Based on the same inflation-indexing method CMS has historically used, the first 2027 IRMAA tier is projected to begin around $111,000 MAGI for single filers (roughly $222,000 for joint filers), with additional tiers near $140,000, $175,000, $210,000, and a top tier that is set by statute at $500,000 single / $750,000 joint (this top tier is not inflation-adjusted for 2027; the statute begins indexing it in 2028). These are projections; CMS’s official 2027 announcement is expected in the first half of November 2026.

Projected 2027 Medicare IRMAA income tiers for single filers, with the statutory top tierFive income bands on a modified adjusted gross income axis running from $0 to $560,000. First tier, from ~$111,000 up to $140,000; Additional, from ~$140,000 up to $175,000; Additional, from ~$175,000 up to $210,000; Additional, from ~$210,000 up to $500,000; Top tier, from $500,000 (frozen) and above. The first four thresholds are projections and are drawn dashed; the top threshold of $500,000 is fixed by 42 U.S.C. section 1395r and is drawn solid. For joint filers the first threshold is $222,000 and the top threshold is $750,000.Projected 2027 IRMAA tierssingle filers · 2025 MAGIdashed = projected · solid = set by statuteFirst tier · from ≈$111,000joint filers: ≈$222,000Additional · from ≈$140,000Additional · from ≈$175,000Additional · from ≈$210,000Top tier · from $500,000 (frozen)joint filers: $750,000$0$100K$200K$300K$400K$500KClear Money Guide · 42 U.S.C. §1395r · CC BY 4.0
Four of these five thresholds are projections. One is law. Each band runs from its own threshold up to the next one, which is what an ascending list of tier thresholds means. The four dashed bands are the projected 2027 figures described above — the inflation-indexing method CMS has historically applied, not an announced number — so they are drawn approximate, and they will move. The solid top band starting at $500,000 is fixed for 2027 by 42 U.S.C. §1395r(i)(5)(C) and is not inflation-adjusted until 2028, which is why it is the one line on this chart you can plan against today. It is also the only row where the joint threshold is not simply double the single one: the statute sets the top row for joint filers at $750,000, or 150% of the single threshold, while the first tier’s $222,000 is exactly twice its $111,000. The middle three tiers’ joint thresholds are not published on this page, so they are not drawn. CC BY 4.0.

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If your 2025 income doesn’t reflect your current situation

The two-year lookback is not absolute: Form SSA-44 lets you report a “life-changing event” — retirement, loss of a pension, a work-reduction, marriage, divorce, or the death of a spouse — that lowered your income after the year used to calculate your premium. It does not undo the lookback itself, but it can reduce or eliminate a surcharge based on income that no longer reflects your life. If your 2025 income was unusually high for a one-time reason (a large asset sale, a big Roth conversion), it’s worth preparing the SSA-44 documentation now rather than waiting for the November bracket announcement.

Sources

42 U.S.C. §1395r (the statutory IRMAA structure, including the frozen top-tier threshold). Projected 2027 thresholds: inflation-indexing method as historically applied by CMS, reported across financial-planning publications in 2026 — not an official CMS figure. Verified on September 29, 2026 against 42 U.S.C. §1395r and CMS’s 2026 Part B fact sheet (November 14, 2025); CMS has not yet published 2027 thresholds. Form SSA-44: Social Security Administration.

Every projected figure above is attributed to the organization that published it and is explicitly not yet announced by the government body that sets it. This page will be updated with the official figure the day it is announced, and the projection will be struck through rather than deleted, so the record of what was projected vs. what actually happened stays visible. See the full current-numbers register for every figure this site tracks, dated and sourced. General information, not tax or legal advice.

The 2027 tiers are not announced, though the income year that decides them is already closed. Your 2027 numbers gives the figures that do exist now, and the window CMS has to publish these in.

More Medicare & IRMAA guides: see the full 44-page index.

For every figure this program tracks, see the 2027 numbers hub. To see how income moves you between Medicare premium tiers, read IRMAA brackets and surcharges.