Why IRMAA is called the stealth tax
Most retirees don't realize IRMAA exists until they receive their Medicare premium notice — and by then it's too late to fix it for that year. The surcharge is based on income from two years prior, so a large Roth conversion in 2024 shows up as higher Medicare premiums in 2026. It affects both Medicare Part B (medical) and Part D (prescription drugs). It hits automatically — no notice, no warning, no opportunity to opt out after the fact.
The 2-year lookback rule
Medicare uses your MAGI from 2 years prior to set your current year's premium. This creates a delayed trap — income decisions you make today affect Medicare costs two years from now.
(e.g. Roth conversion)
your tax return
premiums triggered
elevated
| MAGI — single filer | MAGI — married filing jointly | Part B monthly premium | Part D monthly surcharge | Annual cost per person |
|---|---|---|---|---|
| Up to $103,000 | Up to $206,000 | $174.70 | $0 | $2,096 (base rate) |
| $103,001 – $129,000 | $206,001 – $258,000 | $244.60 | +$12.90 | +$1,082/yr |
| $129,001 – $161,000 | $258,001 – $322,000 | $349.40 | +$33.30 | +$2,696/yr |
| $161,001 – $193,000 | $322,001 – $386,000 | $454.20 | +$53.80 | +$4,313/yr |
| $193,001 – $500,000 | $386,001 – $750,000 | $559.00 | +$74.20 | +$4,849/yr |
| Above $500,000 | Above $750,000 | $594.00 | +$81.00 | +$5,168/yr |
Size Roth conversions to stay below IRMAA thresholds
Calculate your projected MAGI before executing any Roth conversion and stop at the threshold below the next IRMAA tier. Even $1 over triggers the full tier surcharge. Annual bracket modeling is essential.
Read: Tax bracket management →Use QCDs to reduce MAGI directly
Qualified Charitable Distributions never enter your MAGI — making them the most powerful tool for reducing IRMAA exposure. A $50,000 QCD satisfying your RMD can drop you below an entire IRMAA threshold, saving more in Medicare premiums than many people expect.
Read: QCDs & NUA strategies →Draw from Roth IRA or IUL — zero MAGI impact
Qualified Roth IRA withdrawals and IUL policy loans do not count toward MAGI. Replacing taxable IRA distributions with Roth or IUL income in high-income years keeps your MAGI below IRMAA thresholds permanently.
Read: IUL life insurance →Use tax-loss harvesting to offset income
Capital losses reduce your MAGI directly. In years where you must take a large conversion or distribution, pairing it with strategic tax-loss harvesting can offset enough income to stay below the next IRMAA threshold.
Read: Tax-loss harvesting →Spread income events across multiple years
Stage large Roth conversions across multiple years — keeping each year's MAGI below the next IRMAA tier. The Version B self-completing Roth (Bonus FIA) is specifically designed around this multi-year staging principle.
Read: Self-completing Roth Version B →Appeal a one-time income spike with Form SSA-44
If your surcharge was triggered by a one-time income event — business sale, inheritance, large conversion — you can appeal to Social Security using Form SSA-44 (Life-Changing Event). Qualifying events include retirement, divorce, death of a spouse, and loss of income. A successful appeal can eliminate or reduce the surcharge for that year.
Plan Asset Diversification Trust sales to spread MAGI
When using an Asset Diversification Trust (DST) to defer capital gains, the installment payment structure spreads recognized income across multiple years — preventing a single-year spike that would otherwise trigger the highest IRMAA tiers.
Read: Asset Diversification Trust →