Retirement · 6 min read · 2026-02-12
The 9-step IRMAA bracket management.
Medicare premiums are not flat. Above specific income thresholds, surcharges add thousands per year. Nine steps keep them in check.
A single dollar over the threshold can cost $5,000.
IRMAA surcharges step up at specific MAGI thresholds. Above each step, premiums for both Part B and Part D rise. At the top brackets, the combined annual surcharge for a married couple can exceed $10,000. The 2-year lookback means current actions affect premiums two years later.
The nine indicators
The nine steps of IRMAA management.
Each is a specific action to control the MAGI that drives IRMAA brackets. The composite preserves Medicare premium efficiency.
Two-year MAGI lookback awareness
Pattern: 2024 IRMAA = 2022 MAGI
IRMAA in any year is based on MAGI from 2 years prior. Plan accordingly.
Roth conversion bracket fill (not over)
Threshold: top of IRMAA bracket
Roth conversions add to MAGI. Sizing them to fill — but not exceed — the IRMAA bracket prevents premium spike.
Capital gains realization timing
Pattern: alternate year bunching
Bunch capital gains in low-MAGI years; defer in high-MAGI years. Avoid pushing across IRMAA thresholds.
RMD planning before age 73
Pattern: pre-RMD reduction
Pre-RMD Roth conversions reduce future RMD-driven MAGI. Smaller RMDs mean lower IRMAA exposure later.
QCD (Qualified Charitable Distribution) over 70½
Limit: $105K (2026)
QCDs reduce MAGI directly. They count toward RMD without adding to AGI. Powerful IRMAA tool for charitably-inclined retirees.
Tax-loss harvesting integration
Pattern: offset gains
Realized losses reduce MAGI. Coordinate harvesting with capital gain timing to manage IRMAA.
Tax-exempt interest (still counts)
Pattern: muni bonds in MAGI
MAGI for IRMAA purposes includes tax-exempt interest. Muni bonds reduce taxable income but not IRMAA MAGI.
Form SSA-44 for life-changing events
Pattern: appeal mechanism
Specific life-changing events (retirement, death, divorce, work reduction) allow appeal of IRMAA brackets via SSA-44.
Spread income across calendar years
Pattern: alternate-year strategy
Bunching one-time income (Roth conversion, large capital gain) into single years preserves IRMAA brackets in alternate years.
How IRMAA actually works
Income-Related Monthly Adjustment Amount surcharges raise Medicare Part B and Part D premiums for higher-income beneficiaries. The brackets step up at specific MAGI thresholds (in 2026, $103,000 single / $206,000 married is the first threshold; the top threshold is $500,000 single / $750,000 married).
The surcharges are non-trivial. Top-bracket Part B premium is approximately 3.4× the standard premium. Add Part D surcharges, and the combined annual cost for a top-bracket couple is $10,000+ above standard premiums. Each bracket step up represents thousands per year of additional Medicare costs.
The 2-year lookback
IRMAA in any year is based on MAGI from two years prior. 2026 IRMAA brackets reflect 2024 MAGI. This lookback creates planning opportunities: actions taken now affect premiums two years from now. Roth conversions in 2026 will affect 2028 IRMAA. The discipline is to plan multi-year tax windows with the 2-year shift in mind.
The lookback also creates appeal opportunities. Form SSA-44 allows IRMAA reduction when current circumstances (retirement, divorce, etc.) produce lower MAGI than the 2-year-prior period.
Roth conversion bracket-filling
Pre-Medicare retirees often have access to Roth conversion windows in their early 60s. The optimization is to fill conversion up to — but not over — IRMAA bracket thresholds. Crossing a threshold triggers thousands of dollars of additional Medicare premium two years later.
The math sometimes favors stopping conversion below the threshold even when more conversion would be tax-efficient on its own. The IRMAA tax adds roughly 5–8 percentage points of effective marginal rate at threshold crossings, which exceeds the federal income tax rate increase between adjacent brackets in many cases.
Tax-exempt interest counts
MAGI for IRMAA purposes adds tax-exempt municipal bond interest to AGI. Holders relying on muni bonds for tax-free income still face IRMAA exposure on the interest. The implication is that the tax-efficient muni-heavy portfolio still drives IRMAA brackets.
The remediation depends on the household's income profile. For high-income retirees facing IRMAA regardless of bond choice, the muni decision is unchanged by IRMAA. For households just above the threshold, the muni interest may push them into a higher bracket, and reducing muni holdings (or replacing with TIPS or tax-deferred bonds in tax-deferred accounts) can preserve the lower IRMAA bracket.
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Common questions
Questions.
Are IRMAA brackets indexed?
Partially. Recent legislation indexed brackets to inflation prospectively. Pre-2020 brackets were not indexed for years.
Can I appeal IRMAA?
Yes via Form SSA-44 for specific life-changing events: marriage/divorce, retirement, death of spouse, loss of pension or income, etc.
What's the maximum IRMAA?
Top bracket adds approximately $4,560 (Part B) + $590 (Part D) per beneficiary annually in 2026. For a couple, both face the surcharge.
Are HSA contributions excluded from IRMAA MAGI?
Yes — HSA contributions reduce AGI and thus MAGI. Useful pre-65 strategy.
Does Roth IRA distribution affect IRMAA?
No — qualified Roth distributions are excluded from MAGI. Significant IRMAA-management advantage.
What about long-term capital gains?
Yes, included in MAGI. The capital gains rate may be 0–20% but the IRMAA bracket impact is separate. Plan accordingly.
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