As retirement approaches, many individuals begin focusing on investment strategies, Social Security timing, and healthcare costs. One planning area that is often overlooked is Income-Related Monthly Adjustment Amount, commonly known as IRMAA.
For higher-income retirees, IRMAA can increase monthly Medicare premiums significantly. Because these surcharges are based on income from prior years, decisions made before retirement can directly affect healthcare costs later.
Understanding how IRMAA brackets work — and planning ahead — may help retirees better coordinate taxes, retirement income, and Medicare expenses.
IRMAA stands for Income-Related Monthly Adjustment Amount. It is an additional premium surcharge applied to Medicare Part B and Part D for individuals whose income exceeds certain thresholds.
The government uses your Modified Adjusted Gross Income (MAGI) from two years prior to determine whether additional premiums apply. For example, your 2024 income generally determines your Medicare premiums in 2026.
Many people are surprised to learn that income spikes before retirement can impact Medicare costs years later.
Several common retirement planning decisions can increase taxable income enough to move someone into a higher IRMAA bracket, including:
In some cases, even a one-time financial event may temporarily increase Medicare premiums.
Many retirees experience a unique planning window between retirement and Medicare eligibility. During this time, taxable income may temporarily decline before Social Security benefits and RMDs begin.
This period can create opportunities for more intentional tax planning strategies, such as:
The objective is not necessarily to avoid taxes entirely, but rather to help prevent unnecessary income spikes that may affect future Medicare premiums.
Roth conversions are commonly discussed as part of long-term retirement tax planning because they may help reduce future taxable income and future RMD obligations.
However, Roth conversions also increase taxable income in the year the conversion occurs, which can potentially move retirees into higher IRMAA brackets later.
This does not automatically make Roth conversions unfavorable. In some situations, paying slightly higher Medicare premiums temporarily may still align with a broader long-term tax strategy.
The important factor is understanding how the timing and size of conversions may impact both taxes and Medicare costs.
Social Security Administration benefits can also affect overall taxable income depending on an individual’s income sources.
When combined with:
Social Security benefits may contribute to crossing into higher IRMAA thresholds. Because of this, retirement income planning often works best when viewed as a coordinated strategy rather than a series of isolated decisions.
As you approach retirement, it may be helpful to evaluate:
These are highly individualized decisions, and the right approach can vary depending on retirement goals, income sources, healthcare needs, and legacy objectives.
IRMAA brackets are an important part of retirement income planning that many individuals do not fully consider until Medicare premiums unexpectedly increase.
Preparing ahead of time may provide more flexibility when coordinating taxes, healthcare costs, Social Security benefits, and retirement withdrawals. Even small adjustments made before retirement can potentially create meaningful differences over time.
If you would like to have a conversation about how IRMAA, retirement income planning, or Medicare costs may fit into your overall financial picture, reach out to discuss strategies tailored to your situation.