Medicare IRMAA: 7 Strategies to Avoid the High-Income Surcharge

If you’re retired or approaching retirement on the Treasure Coast, there’s a Medicare cost you may not see coming — and it can add hundreds, even thousands, of dollars to your annual healthcare expenses. Medicare IRMAA (Income-Related Monthly Adjustment Amount) is a surcharge added to your Medicare Part B and Part D premiums when your income exceeds certain thresholds. Most people don’t hear about it until they get a letter from Social Security telling them they owe more — and by then, the income that triggered it is already two years in the rearview mirror. The good news? With thoughtful planning, there are legitimate strategies to reduce or even avoid this surcharge altogether.

What Is Medicare IRMAA and How Does It Work?

Medicare IRMAA stands for Income-Related Monthly Adjustment Amount, and it functions as a premium surcharge tacked onto the standard Medicare Part B and Part D costs. The federal government uses your Modified Adjusted Gross Income (MAGI) from two years prior to determine whether you’ll pay these additional amounts. So if you’re enrolling in Medicare in 2025, the Social Security Administration is looking at your 2023 tax return to set your premium level. This two-year lookback is one of the most important — and most misunderstood — features of the system, because it means the financial decisions you make today can directly affect what you pay for Medicare coverage years down the road.

The surcharge is tiered, meaning higher income levels result in progressively larger premium increases. For Medicare Part B alone, the additional cost can range from a couple hundred dollars per year to well over $4,000 annually for high earners — and that’s per person, not per household. Married couples can see their combined Medicare costs rise dramatically if both spouses trigger Medicare IRMAA thresholds. Understanding this structure is essential, because it shifts the way you need to think about retirement income planning — it’s not just about how much money you withdraw, but when and from which accounts.

Understanding the IRMAA Income Thresholds

Medicare IRMAA is calculated using your Modified Adjusted Gross Income, which includes wages, self-employment income, taxable Social Security benefits, pension income, Required Minimum Distributions from traditional IRAs and 401(k)s, capital gains, and even tax-exempt interest from municipal bonds. For 2025, the standard Part B premium applies to individuals with MAGI below $106,000 and married couples filing jointly with MAGI below $212,000. Once you cross those thresholds, Medicare IRMAA kicks in and your premiums jump — often significantly. You can review the most current thresholds directly on the Medicare.gov costs overview page.

What catches many retirees off guard is how easy it is to accidentally exceed these thresholds. A large Roth conversion, the sale of a vacation home or investment property, a one-time retirement distribution, or even a particularly strong year in a taxable investment account can all push your MAGI above the cutoff. Once you understand that Medicare IRMAA is tied to MAGI — not just salary or pension income — you begin to see why retirement income strategy is so much more nuanced than simply spending from whatever account is most convenient. Every income source and every financial event during the year needs to be considered in context.

Strategy 1 & 2: Roth Conversions and Account Diversification

One of the most powerful long-term tools for managing Medicare IRMAA exposure is converting traditional IRA or 401(k) funds to a Roth IRA over time. Roth conversions are taxable in the year they occur, but once money is inside a Roth IRA, future withdrawals — including growth — are generally tax-free and do not count toward your MAGI. This means that a retiree who has done thoughtful Roth conversions in their 60s may find themselves pulling retirement income largely from tax-free sources later, keeping MAGI lower and potentially staying under Medicare IRMAA thresholds. The key is doing these conversions strategically — typically during years when your income is naturally lower, such as the gap between retirement and when Social Security or RMDs begin.

The second strategy is closely related: building a diversified retirement income portfolio that gives you flexibility in where withdrawals come from each year. If all your retirement savings sit in pre-tax accounts, every dollar you withdraw increases your MAGI — and your Medicare IRMAA exposure. But if you have a mix of traditional pre-tax accounts, Roth accounts, and taxable brokerage accounts, you have much more control. In a given year, you might draw from Roth funds to keep your MAGI below a threshold, then shift to pre-tax funds in a year when other income is lower. This kind of tax-bucket strategy requires advance planning, but it’s one of the most effective ways to manage both your tax bill and your Medicare costs in retirement.

Strategy 3 & 4: Managing RMDs and Using Qualified Charitable Distributions

Required Minimum Distributions (RMDs) from traditional IRAs and employer-sponsored retirement plans are a major driver of Medicare IRMAA exposure for many retirees. Once you reach the age when RMDs are required (currently age 73 under the SECURE 2.0 Act), you must withdraw a set amount each year based on your account balance and life expectancy — whether you need the money or not. These distributions are fully taxable and count toward your MAGI, which is why retirees with large pre-tax account balances often find themselves pushed into higher Medicare IRMAA brackets they weren’t anticipating. Managing RMDs thoughtfully — including understanding when they begin and how they grow over time — is a critical component of retirement income planning.

A powerful companion strategy to managing RMDs is the Qualified Charitable Distribution (QCD). If you are age 70½ or older, you can transfer up to $105,000 per year (indexed for inflation) directly from your IRA to a qualified charity. The distribution counts toward your RMD but — and this is the key benefit — it does not appear as taxable income on your return and does not count toward your MAGI. For retirees who are charitably inclined and concerned about Medicare IRMAA, QCDs can be an elegant solution: you satisfy part or all of your RMD, support causes you care about, and keep your MAGI lower. This is one of those strategies that feels almost too good to be true, but it’s very much a legitimate part of the tax code.

Strategy 5 & 6: Timing Capital Gains and Other Income Sources

For retirees who hold investment assets in taxable brokerage accounts, the timing of capital gains realizations can have a direct impact on Medicare IRMAA. If you’re planning to sell an appreciated asset — whether it’s a stock, a mutual fund, or even a piece of real estate — the gain you recognize increases your MAGI for that year. A large one-time gain can easily push you into the next IRMAA bracket, triggering a surcharge two years later that you weren’t expecting. Thoughtful capital gains harvesting — including spreading gains across multiple tax years where possible, or offsetting gains with losses — can help you manage MAGI more precisely and reduce Medicare IRMAA exposure over time.

The sixth strategy involves taking a broader view of all income sources and coordinating them intentionally throughout the year. This means thinking carefully about when to begin Social Security, since up to 85% of your benefit may be taxable and will count toward MAGI. It also means considering the impact of pension income, rental income, dividends, interest, and any part-time consulting or business income on your Medicare IRMAA calculation. In practice, this kind of income coordination is best done with a comprehensive financial plan that models out MAGI across multiple years, looking at which accounts to draw from and when. The Treasure Coast has many retirees who are navigating a complex mix of income sources, and the ones who plan intentionally around Medicare IRMAA tend to come out significantly ahead.

Strategy 7: Appeal Medicare IRMAA After a Life-Changing Event

Even with the best planning, sometimes income in a given year is unusually high due to circumstances beyond your control — or circumstances that simply won’t repeat. A spouse’s death, divorce, retirement from a long-held job, loss of income-producing property, or a significant reduction in income for any qualifying reason can all be grounds for appealing your Medicare IRMAA determination. The Social Security Administration allows you to request a review using more recent income information if you’ve experienced what they call a “life-changing event.” This is an important safety valve that many retirees don’t know exists.

To initiate an appeal, you can contact Social Security directly or complete Form SSA-44, which is specifically designed for Medicare IRMAA reconsideration requests. You’ll need to provide documentation of the life-changing event and your more recent income information. If your income has genuinely dropped, Social Security can recalculate your surcharge based on current-year or prior-year data rather than the two-year lookback. For retirees who sold a business or property, retired mid-year, or experienced a significant change in circumstances, this appeal process can result in meaningful premium savings. Details on qualifying events can be found on the Social Security Administration’s IRMAA page.

Why This Matters So Much for Treasure Coast Retirees

Here on the Treasure Coast — in communities like Stuart, Palm City, Port St. Lucie, and Jensen Beach — retirees often arrive with substantial accumulated wealth from careers in the Northeast, Midwest, or other high-cost regions. Many have significant pre-tax retirement accounts, investment portfolios, and in some cases, real estate or business assets. Florida’s lack of a state income tax is a major draw, and rightfully so, but that doesn’t mean your federal tax picture — including Medicare IRMAA — takes care of itself. In fact, retirees who move to Florida without revisiting their income and distribution strategy can find themselves in a worse Medicare IRMAA situation simply because they’re more comfortable drawing freely from their accounts without considering the downstream effects.

The team at 1715 Total Client Focus works specifically with retirees and pre-retirees in this community, and Medicare IRMAA is one of the planning topics that comes up consistently — especially as clients begin to see their RMDs grow and their investment accounts appreciate. The conversations we have aren’t just about investment returns; they’re about how to structure income in a way that preserves your lifestyle, manages your tax burden, and keeps your healthcare costs as predictable as possible. Medicare IRMAA planning is a perfect example of where financial strategy and real-world retirement quality of life intersect.

Bringing It All Together

Medicare IRMAA isn’t a penalty for success — it’s a feature of the Medicare system that affects a growing number of retirees, and understanding it is one of the most valuable things you can do for your long-term financial wellness. The seven strategies outlined here — Roth conversions, income account diversification, RMD management, Qualified Charitable Distributions, capital gains timing, comprehensive income coordination, and IRMAA appeals — each represent a legitimate and thoughtful approach to keeping your Medicare costs in check. No single strategy works for everyone, and the right combination depends on your specific income sources, account mix, family situation, and goals.

What all these strategies share is a common theme: intentionality. Medicare IRMAA rewards those who plan ahead and penalizes those who react after the fact. The two-year lookback means that the decisions you make today are literally shaping your Medicare premiums for future years. For retirees who want to protect more of what they’ve worked so hard to accumulate, getting familiar with Medicare IRMAA — and building a retirement income plan around it — is time very well spent.

If you’d like to go deeper on any of these strategies, we’d encourage you to listen to our podcast episode, Medicare IRMAA: 7 Strategies to Avoid the High-Income Surcharge, where we walk through each of these approaches in plain, conversational language. And if you’re ready to talk through how Medicare IRMAA fits into your broader retirement plan, we’d love to connect and have that conversation with you.

This content is for educational purposes only and does not constitute investment advice. Past performance is not indicative of future results. Please consult a qualified financial professional before making any financial decisions.