For affluent investors, turning 65 means Medicare goes from a routine health insurance milestone into a sophisticated tax and cash-flow management decision. While eligibility is universal, the premiums you can pay are significantly higher due to federal surcharges. Integrating Medicare planning into your broader wealth strategy can help you anticipate—and mitigate—premium increases to enhance long-term tax efficiency and household wealth.
How does income affect Medicare premiums for high earners?
High-net-worth investors pay higher Medicare Part B (medical) and Part D (prescription drug) premiums through the Income-Related Monthly Adjustment Amount (IRMAA). IRMAA is a federal surcharge added to standard premiums when Modified Adjusted Gross Income (MAGI) exceeds defined federal thresholds.
- The two-year lookback rule: IRMAA calculations rely on federal tax returns from two years prior. For example, 2026 Medicare premiums are dictated by your 2024 MAGI.
- The “IRMAA cliffs”: Unlike progressive income tax brackets where higher rates apply only to income above a threshold, IRMAA operates on strict tier cliffs. Crossing a threshold by as little as one dollar triggers the full surcharge for that entire bracket, which can dramatically increase monthly costs. The thresholds are indexed annually so be sure to review the latest amounts.
- Request a decrease to your IRMAA: If your income is impacted by a variety of qualifying life events, Form SSA-44 allows you to ask to lower the additional amount you’ll pay for Medicare Part B and Part D.
How can you minimize Medicare surcharges at higher income levels?
Minimizing healthcare surcharges requires proactive coordination between your financial advisor, CPA, and health coverage timeline:
- Time significant income realizations: Execute major Roth conversions or capital gain harvests before age 63 (income realized from age 63 onward is the first to impact Medicare premiums, since age-65 premiums are based on your MAGI at 63.)).
- Utilize Qualified Charitable Distributions (QCDs): After age 70½, directing IRA distributions directly to qualified charities satisfies required minimum distributions (RMD) requirements while excluding those funds from your income.
- Coordinate employer coverage and HSAs: If you or your spouse actively work past 65 and maintain qualifying employer group health coverage, you can delay Medicare Part B without penalty. Delaying Medicare allows you to continue tax-advantaged Health Savings Account (HSA) contributions.
| Situation | Planning consideration | Timing window | Coordinate with |
| Large Roth conversion | Full conversion amount lands in MAGI | Before age 63 | CPA, financial advisor |
| Business or property sale | One-time gain isn’t appealable | Before age 63, or spread across years | CPA, attorney, financial advisor |
| Working past 65 | Group coverage may allow Part B deferral | Before initial enrollment period | HR/benefits, financial advisor |
| Charitable intent | QCDs satisfy RMDs outside MAGI | From age 70½ | CPA, financial advisor |
| Recent retirement | Life-changing event may support SSA-44 | On receiving determination notice | Financial advisor, former employer |
Proactive coordination aligns major wealth events and healthcare decisions with your broader estate, tax, and legacy goals. At Promus Advisors, we pride ourselves on providing integrated financial coordination by working closely with your CPA and lawyer so your financial plan is taking a comprehensive view of your life.
If you’re coming up on 65 with a major income event on the horizon, let’s talk about how it fits your broader tax, retirement, and estate plan.
Frequently Asked Questions
U.S. citizens and permanent residents age 65 or older, disabled individuals, or those with end-stage renal disease are eligible for Medicare. Medicare’s Plan Finder Tool is a great starting point to understand what plan may be best for you.
Social Security retirement benefits can be claimed between ages 62 and 70, whereas the Medicare Initial Enrollment Period centers on turning age 65. Individuals collecting Social Security before age 65 are automatically enrolled in Parts A and B upon reaching 65. Those not receiving Social Security benefits must manually enroll during their applicable window.
A handful of states—California, Oregon, Idaho, Nevada, Illinois among them—let beneficiaries switch Medigap plans annually without medical underwriting. Texas doesn’t. The Medigap plan selected during the initial six-month open enrollment window is the one a client is likely stuck with, because later switches are subject to underwriting and can be declined on health grounds.
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