Tier 5 Couple at $800k MAGI: Is IRMAA Just a Cost of Doing Business?

Sample case: 67-year-old retired-doctor couple, both on Medicare, joint MAGI $800,000 from a real estate portfolio, dividend stocks, and ongoing consulting. Both are in IRMAA Tier 5.

The premium math

Each beneficiary pays Part B $206.50 + IRMAA $444.90 = $651.40 per month. Plus Part D $36.78 + IRMAA $88.30 = $125.08 per month. Per person: $776.48 per month, $9,318 per year. For both spouses: $18,635 per year. Their Tier 0 baseline would have been $5,839, so IRMAA costs them an extra $12,796 annually.

Why "just pay it" is the rational answer

The Tier 5 floor is $497,001 single or $754,001 joint MAGI. Their $800k is comfortably above the floor. Trimming MAGI by $46,000 to drop one tier saves $1,008 per year ($444.90 - $407.70 = $37.20/mo Part B; $88.30 - $81 = $7.30/mo Part D, two beneficiaries, twelve months = $1,068). Not worth restructuring real estate or consulting income for.

The exceptions worth doing

1) QCDs once they reach 70.5. They donate $50,000 annually to their alma mater. Sending it from the IRA bypasses MAGI, saving them at least $13,500 in federal tax annually. 2) Charitable Remainder Trust (CRT) if they want to fund the consulting business as a non-grantor entity. 3) HSA funded years ago to pay Medicare premiums tax-free, saving them ~7% on each premium dollar.

Estate angle

At Tier 5 income levels, IRMAA is really a wealth tax. The couple's estate plan focuses on managing the eventual income transition to their adult kids: gifting appreciated assets early, structuring inherited IRAs for the kids' likely lower brackets, and coordinating Roth conversions in low-income years (e.g., a sabbatical year for one of the kids).

Lesson

For Tier 5 retirees, micro-managing each bracket is wasted effort. The big wins come from charitable bypasses, estate strategy, and accepting that IRMAA is a price for the income they enjoy.