Medicare’s Hidden Tax: How IRMAA Hits Retirees

If you’re approaching retirement or already retired, you’ve probably heard the term “IRMAA” mentioned in conversations about Medicare costs. 

While we have touched on this in (almost) every blog post in some form or fashion, we’ve not fully dove into what IRMAA is.  

This often-overlooked aspect of retirement planning can significantly impact your healthcare expenses, yet many retirees are caught by surprise when they receive their first IRMAA determination letter.

What is IRMAA?

IRMAA stands for Income-Related Monthly Adjustment Amount. 

Simply put, it’s a surcharge added to your Medicare Part B and Part D premiums if your income exceeds certain thresholds. 

While most Medicare beneficiaries pay only the standard premium amounts, higher-income retirees may find themselves paying substantially more.

The critical thing to understand about IRMAA is the two-year lookback period. Your 2025 IRMAA determination is based on your 2023 tax return. 

This timing gap often creates confusion and sometimes financial stress for new retirees whose current income may be much lower than it was two years ago.

The Income Thresholds That Trigger IRMAA

For 2025, IRMAA kicks in when your Modified Adjusted Gross Income (MAGI) from your 2023 tax return exceeds $106,000 for individual filers or $212,000 for joint filers.

MAGI for IRMAA purposes includes:

• Your Adjusted Gross Income (AGI)
• Tax-exempt interest (like municipal bond income)
• Capital gains
• The taxable portion of Social Security benefits

From there, the surcharges increase across several income brackets. 

For example, an individual with a MAGI between $106,000 and $133,000 will pay an additional $74 per month for Part B (on top of the standard $185 premium) and an extra $13.70 per month for Part D.

At the highest income levels (above $500,000 for individuals or $750,000 for joint filers), the Part B surcharge can reach $443.90 per month per person, with an additional $85.80 for Part D.

Strategic Approaches to Managing IRMAA

Fortunately, there are legitimate strategies that can help you avoid or reduce IRMAA surcharges:

1. Plan your retirement withdrawals strategically: Carefully planning which accounts you withdraw from can help manage your taxable income. Consider whether taking larger distributions in some years and smaller ones in others might help you stay below threshold amounts over time.
2. Consider Roth conversions: Converting traditional IRA funds to Roth IRAs in lower-income years may increase your taxable income temporarily but reduce it in future years, potentially helping you avoid higher IRMAA brackets later. Remember to account for the two-year lookback when planning conversions.
3. Utilize charitable giving: If you’re charitably inclined, donating appreciated assets directly to charity can help you avoid capital gains taxes and lower your MAGI.
4. Tax-loss harvesting: Realizing capital losses can offset capital gains and potentially reduce your MAGI.
5. Delay RMDs if possible: The SECURE Act and SECURE Act 2.0 have increased the age for Required Minimum Distributions, potentially helping you manage your taxable income in certain years.

Appealing an IRMAA Determination

If your circumstances have changed since the tax year being used for your IRMAA determination, you may have grounds for an appeal. Common qualifying life-changing events include:

• Retirement or work reduction
• Death of a spouse
• Marriage or divorce
• Loss of income-producing property
• Loss or reduction of certain pension income

To appeal, you’ll need to complete Form SSA-44 (Medicare Income-Related Monthly Adjustment Amount – Life-Changing Event) and provide documentation supporting your claim. You generally have 60 days from receiving your IRMAA notice to file an appeal.

How IRMAA Works with Different Medicare Plans

Whether you have Original Medicare or a Medicare Advantage plan, IRMAA will apply if your income exceeds the thresholds. For Medicare Advantage enrollees, you’ll still pay your Part B premium (including any IRMAA surcharge) plus your plan premium. If your Medicare Advantage plan includes prescription drug coverage, the Part D IRMAA surcharge will also apply.

How IRMAA Surcharges Are Collected

If you receive Social Security benefits, your IRMAA surcharges for both Part B and Part D will automatically be deducted from your monthly benefit payment. If you don’t receive Social Security, you’ll be billed directly by Medicare.

Planning Ahead is Key

Understanding IRMAA and incorporating it into your retirement planning can help you avoid unpleasant financial surprises. The two-year lookback period makes it especially important to consider how your financial decisions today might affect your Medicare costs down the road.

Consider consulting with a financial advisor who specializes in retirement planning to develop strategies that can help you manage your MAGI and potentially minimize your exposure to IRMAA surcharges while maintaining your desired retirement lifestyle.

Remember: a little planning today can save you thousands in healthcare costs tomorrow.