Why Your Medicare Premium Suddenly Went Up: How IRMAA Really Works (Explained Simply)

 

One of the most frustrating conversations I have with retirees in Utah goes something like this:

“Tyler…why did Medicare suddenly raise my premium?”

Or:

“I thought Medicare Part B was one price for everybody?”

If your Medicare premium unexpectedly increased, there is a good chance something called IRMAA is the reason.

The good news?

IRMAA sounds much more complicated than it actually is.

In this article, I’ll explain:

• What IRMAA is
• Why your Medicare premium changed
• How income affects Medicare costs
• What causes surprise IRMAA increases
• How retirement can lower your Medicare premiums
• Strategies to reduce IRMAA in retirement

Let’s make this simple.

What Is IRMAA?

IRMAA stands for:

Income-Related Monthly Adjustment Amount

That is a fancy government way of saying:

Higher-income retirees pay higher Medicare premiums.

Think of IRMAA as a surcharge added onto Medicare.

If your income exceeds certain limits, Medicare charges more for:

• Medicare Part B (medical insurance)
• Medicare Part D (prescription drug coverage)

In plain English:

The more income you report, the more Medicare may charge you.

How IRMAA Works (Simple Version)

Here is the easiest way to think about it:

Medicare looks backward

This surprises people.

Your Medicare premium this year is based on:

Your tax return from two years ago

For example:

If you are paying Medicare premiums in 2026, Medicare is generally reviewing your 2024 tax return.

That means:

You may already be retired today…

…but Medicare may still be looking at your old high-income working years.

This is one reason retirees feel blindsided.

What Income Does Medicare Look At?

Medicare uses something called:

MAGI (Modified Adjusted Gross Income)

For most retirees:

Think of it as:

Adjusted Gross Income (AGI) + tax-exempt interest

Things that may increase IRMAA include:

• Roth conversions
• Large IRA withdrawals
• Capital gains
• Selling property
• Selling a business
• Big bonuses before retirement
• Stock sales
• Rental income
• Mutual fund capital gain distributions
• Required Minimum Distributions (RMDs)

Many retirees accidentally trigger IRMAA without realizing it.

A Simple Utah Example

Let’s say:

John and Susan retire in Utah.

They sell investments and do a large Roth conversion in the same year.

Suddenly:

Their income jumps.

Two years later they receive a notice:

“Your Medicare premiums are increasing.”

Their first reaction:

“We barely have income now!”

The issue?

Medicare is still using income from two years ago.

The Biggest IRMAA Mistake I See

Here is the mistake:

People accidentally create IRMAA without planning for it.

Example:

Someone says:

“My advisor recommended a $150,000 Roth conversion.”

That may still be a smart tax strategy.

But if nobody discusses Medicare:

They may unknowingly trigger:

• Higher Part B premiums
• Higher Part D premiums
• Multi-year costs

This is why retirement tax planning matters.

Sometimes saving taxes today still makes sense even if IRMAA increases.

The point is:

Know the tradeoff before you do it.

The “IRMAA Cliff” Problem

One thing many people dislike about IRMAA:

It works in tiers.

Meaning:

Crossing an income threshold—even slightly—can increase premiums.

In other words:

A small increase in income can trigger a bigger Medicare premium jump.

That is why proactive planning matters.

Can Retirement Lower IRMAA?

Yes.

This is very important.

Many retirees in Utah do not realize they may qualify for an IRMAA reduction after retirement.

If your income dropped because of:

• Retirement
• Work stoppage
• Loss of pension income
• Divorce
• Death of spouse

You may be able to ask Social Security to reconsider your Medicare premium.

This is called:

A Life-Changing Event appeal

The form often used is:

SSA-44

In simple terms:

You are telling Medicare:

“My income is lower now than the tax return you are using.”

This can potentially reduce premiums.

What Triggers IRMAA Most Often?

Here are the most common reasons I see:

1. Roth Conversions

Excellent strategy in many cases.

But

Increases taxable income.

Always evaluate the Medicare impact.

2. Large IRA Withdrawals

Big distributions can raise income unexpectedly.

3. Selling Investments

Capital gains count.

4. Selling a Business or Property

Very common.

Especially for Utah business owners retiring.

5. Required Minimum Distributions (RMDs)

At some point:

You may lose control of income.

Large RMDs can create IRMAA later in retirement.

6. Widowhood

This is one of the least discussed IRMAA issues.

A surviving spouse often moves from:

Married filing jointly

to

Single tax filing

The IRMAA thresholds become smaller.

This can dramatically raise Medicare costs.

How To Reduce IRMAA

The goal is not:

“Never pay IRMAA.”

Sometimes paying IRMAA is completely worth it.

The goal is:

Pay IRMAA intentionally.

Here are a few planning ideas:

Strategic Roth Conversion Timing

Sometimes smaller Roth conversions over several years work better than one giant year.

Retirement Timing Planning

If retiring soon:

File a Life-Changing Event appeal.

Tax Diversification

Having money in:

• Roth accounts
• taxable accounts
• pre-tax retirement accounts

can provide flexibility.

Monitor Income Before Year-End

Sometimes a small adjustment can prevent crossing a threshold.

Coordinate Medicare + Tax Planning

This is where retirement planning matters.

Medicare decisions and tax decisions affect one another more than many people realize.

Final Thoughts

Here is the simplest way to think about IRMAA:

Medicare looks at your income from two years ago and may charge higher premiums if income exceeded certain thresholds.

That sounds frustrating…

but with planning:

Many surprises can be avoided.

The biggest mistake is discovering IRMAA after a Roth conversion, large withdrawal, or retirement event.

A little planning can save a lot of frustration.

If you are retired or nearing retirement in Utah and want help understanding how Medicare and retirement income planning fit together, I’m happy to help.

Tyler Haskell, CFP®
Professional Insurance Solutions

801-369-3090

Frequently Asked Questions

What does IRMAA stand for?

Income-Related Monthly Adjustment Amount.

Does IRMAA affect Medicare Part A?

No. IRMAA generally affects Part B and Part D premiums.

Why did my Medicare premium suddenly increase?

Often because Medicare is using income from two years ago and your income exceeded IRMAA thresholds.

Can I appeal IRMAA after retirement?

Yes, in many cases. Retirement may qualify as a Life-Changing Event using Form SSA-44.

Do Roth conversions affect IRMAA?

Yes. Roth conversions increase taxable income and can increase Medicare premiums.