IRMAA stands for Income-Related Monthly Adjustment Amount.
If your income exceeds certain thresholds, Medicare may adjust your Part B and Part D premiums.
This surprises many people.
Let's clarify it.
How IRMAA Works
IRMAA is based on income reported to the IRS, typically from two years prior.
If your reported income exceeds certain limits, you may pay higher premiums for:
- Medicare Part B
- Medicare Part D
Thresholds and amounts can change each year.
Why It Catches People Off Guard
You might be retired now.
But IRMAA could be based on income from a high-earning year.
Examples:
- Selling a property
- Large capital gains
- Retirement distributions
- Business income spike
The two-year lookback means a high-income year in the past can affect your Medicare premiums today - even if your current income is lower.
The IRMAA Tiers
IRMAA isn't all-or-nothing. There are multiple income tiers, each with a different premium adjustment.
The adjustment applies in addition to the standard Part B premium and Part D base premium.
Higher income = higher tier = higher premium adjustment.
Specific threshold amounts change annually and can be found on Medicare.gov.
Can IRMAA Be Appealed?
In some situations involving life-changing events, you may be able to request a review.
Qualifying life-changing events may include:
- Retirement (income reduction)
- Death of a spouse
- Divorce or annulment
- Work reduction
- Loss of certain income-producing property
Specific rules apply. The appeal process involves submitting documentation to Social Security.
What IRMAA Does NOT Affect
IRMAA adjusts premiums.
It does not change:
- Your Medicare eligibility
- Your provider network
- Your benefit structure
It's strictly a premium adjustment mechanism.
Who Should Plan for IRMAA
If you anticipate or recently experienced:
- A large retirement account withdrawal
- Capital gains from property or investments
- Business sale proceeds
- Pension income starting
It's worth understanding whether IRMAA may apply in the near future.
Final Thought
If your premium changed and you're unsure why, we can review your situation and confirm whether IRMAA applies.
Understanding the reason removes unnecessary frustration.
Related Topics
- What Is the Medicare Part B Late Enrollment Penalty?
- What Is the Medicare Part D Late Enrollment Penalty?
- Does Original Medicare Have a Maximum Out-of-Pocket Limit?
- Why Is My Prescription More Expensive This Year?
- Medicare Costs & Penalties Overview
Benefits vary by plan, county, and eligibility. Always verify with the plan's Summary of Benefits before enrolling.