Medicare IRMAA: The Hidden Cost of Retirement—and How Tax Diversification Can Help Protect Your Paycheck

By Miguel Núñez | Founder, DIY Wealth Planning & Cube Insurance Group | October 2026

You've worked hard, saved diligently, invested wisely, and prepared for retirement.

Now comes the challenge of turning those savings into the lifestyle you've envisioned while managing taxes, healthcare costs, and income decisions.

One potential cost that can affect your retirement paycheck is IRMAA.

IRMAA is an additional Medicare premium that may apply when your income exceeds certain thresholds. Some financial decisions that helped you accumulate wealth—such as large retirement-account withdrawals or Roth conversions—can also increase your Medicare premiums later.

The key is not to avoid every taxable event. It is to understand how retirement income, taxes, Medicare premiums, and liquidity interact.

What Is Medicare IRMAA?

IRMAA stands for Income-Related Monthly Adjustment Amount.

In plain English, it is an additional premium certain Medicare beneficiaries pay for Part B medical coverage and Part D prescription drug coverage when their income exceeds established thresholds.

Medicare generally uses modified adjusted gross income from two years earlier.

That means your 2026 Medicare premiums are generally based on your 2024 income.

For 2026, the standard Medicare Part B premium is $202.90 per month.

IRMAA generally begins when modified adjusted gross income exceeds:

• $109,000 for individual filers.
• $218,000 for married couples filing jointly.

At higher income levels, both Part B and Part D surcharges can become substantial. For married couples who both have Medicare, the additional charges can apply to each spouse.

The important distinction is this:

Your retirement spending and your Medicare-countable income are not necessarily the same thing.

Understanding that difference provides a foundation for evaluating retirement-income strategies.

The Retirement Income Problem

Consider someone with a substantial 401(k), taxable investment accounts, and expected Social Security benefits.

A large withdrawal from a traditional IRA or 401(k) generally increases taxable income. A Roth conversion can also create taxable income in the year it occurs, even though it may support long-term retirement or estate-planning goals.

That conversion may increase income enough to affect Medicare premiums two years later.

This does not make Roth conversions or traditional retirement accounts inherently problematic. It means retirement decisions should be evaluated together rather than in isolation.

The broader planning question is:

How can you create retirement income while preserving flexibility around taxes and Medicare premiums?

Tax Diversification: Different Sources, Different Consequences

Investment diversification spreads assets across different investments. Tax diversification applies a similar concept to the way retirement money is accessed.

Having multiple sources of funds may allow you to choose among different tax treatments as circumstances change.

1. Taxable retirement income

Traditional IRA and 401(k) withdrawals are generally taxable, except to the extent they represent previously taxed contributions.

These withdrawals can increase adjusted gross income and potentially affect Medicare premiums.

2. Tax-advantaged retirement income

Qualified Roth IRA distributions generally are not included in federal taxable income.

This can provide retirement-income flexibility without ordinarily increasing IRMAA-related income.

3. Cash value accessed through life insurance policy loans

A properly structured Indexed Universal Life insurance policy may provide access to accumulated cash value through policy loans.

When a policy qualifies for favorable tax treatment, is not classified as a Modified Endowment Contract, and remains in force, properly administered loans generally are not treated as current federal taxable income.

As a result, those loans generally do not increase the modified adjusted gross income used to calculate Medicare IRMAA.

However, IUL is permanent life insurance—not a Roth IRA or a substitute for ordinary retirement investing. It has insurance costs, loan interest, funding requirements, and policy risks.

The relevant question is whether it has a legitimate role within an appropriately diversified financial plan.

Where IUL May Fit—and Where It May Not

Indexed Universal Life insurance combines permanent life insurance protection with a cash-value component whose interest credits may be linked to an external market index.

Unlike purchasing an index fund, you do not directly invest in the underlying stock market index. Instead, interest is credited according to the insurer's contractual formula, which may include participation rates, caps, spreads, and guaranteed minimum crediting provisions.

With adequate funding and favorable policy performance, an IUL policy may accumulate cash value that can potentially:

• Provide permanent life insurance protection for loved ones.
• Accumulate value on a tax-deferred basis.
• Offer access to available policy value through withdrawals or loans.
• Provide an additional source of financial flexibility during retirement.
• Support wealth-transfer objectives through the policy's death benefit.

The potential retirement-planning benefit is the treatment of qualifying policy loans for federal income tax purposes. But that benefit must be considered alongside the policy's costs, assumptions, and risks.

A simple retirement-income illustration

Suppose you need an additional $20,000 for a major home improvement, unexpected expense, or family celebration during retirement.

Option A: Withdraw $20,000 from your traditional IRA.

Assuming the entire withdrawal is taxable, the $20,000 generally increases adjusted gross income. Depending on your other income, it could increase federal income taxes and potentially place you into a higher Medicare IRMAA bracket two years later.

Option B: Borrow $20,000 against an appropriately structured, non-MEC IUL policy.

Assuming the policy has sufficient available loan value, remains in force, and the loan qualifies for favorable tax treatment, the $20,000 in loan proceeds generally is not included in current taxable income.

Consequently, the loan itself ordinarily would not increase income for Medicare IRMAA purposes.

That is the potential advantage—but the policy loan is not free money. Interest accrues, available policy values are affected, and outstanding loans can reduce the death benefit. Poorly managed borrowing can increase the risk of policy lapse and an unexpected tax bill.

Using IUL loans also does not eliminate required minimum distributions from traditional retirement accounts.

The Important Fine Print

An IUL intended to provide supplemental retirement liquidity requires careful consideration of:

• Policy funding: Premiums must be sustainable, and funding should support the intended insurance and cash-value objectives.
• Modified Endowment Contract rules: Premium funding must be monitored under federal tax rules, including the seven-pay test, to avoid unintended MEC classification. A MEC generally receives less favorable tax treatment for loans and distributions.
• Loan costs: Policy loans accrue interest and may affect cash value, death benefits, and long-term policy sustainability.
• Insurance charges: Cost-of-insurance and administrative charges continue to affect policy values.
• Performance assumptions: Index-crediting results are not guaranteed. Even with a 0% index-crediting floor, policy values can decline because of charges and loan costs.
• Policy persistence: If a policy lapses or is surrendered with outstanding loans, taxable income may result—even when the policyholder receives little or no cash at termination.

A life insurance policy purchased primarily for short-term liquidity or solely to avoid Medicare surcharges may be unsuitable and expensive.

The insurance should make sense first. Potential tax advantages should be a considered benefit—not the entire reason for purchasing the policy.

If you're comparing IUL with other retirement options, see:

Roth IRA vs. IUL: Which Fits Your Retirement and Protection Goals?

Coordinating Social Security, Roth Conversions, and RMDs

Tax diversification is only one part of the planning process. Social Security, Roth conversions, and required minimum distributions can also affect taxable income and Medicare premiums.

Social Security

When should you start collecting Social Security—age 62, full retirement age, or age 70?

The answer depends on your individual circumstances.

Social Security benefits can also affect taxable retirement income. Depending on your combined income, up to 85% of your benefits may be subject to federal income tax.

Coordinating Social Security with retirement-account withdrawals therefore deserves attention.

Our complimentary Social Security Break-Even Calculator helps you explore different claiming ages and compare cumulative benefits over time.

It is an educational starting point—not a personalized claiming recommendation.

If your question is about Medicare premiums themselves, our complimentary 2026 Medicare IRMAA Calculator estimates how your income may affect your Part B and Part D surcharges.

Roth conversions

Moving money from a traditional retirement account into a Roth account can create a current tax liability and may affect Medicare premiums two years later.

However, qualified Roth withdrawals in later retirement generally do not increase Medicare-countable income.

The potential benefit must be weighed against the taxes paid during conversion and any associated Medicare premium impact.

Our free Roth vs. Traditional IRA Decision Guide, available in our Tools & Resources Library, introduces these considerations in plain English.

Required minimum distributions

Traditional retirement accounts generally become subject to RMDs beginning at age 73 or 75, depending on your birth year.

Those withdrawals may increase taxable income whether or not you need the money for living expenses.

Planning for RMDs, Social Security, Roth distributions, and other available resources before mandatory withdrawals begin may provide additional flexibility.

For charitably inclined individuals, qualified charitable distributions may offer another planning consideration under applicable IRS rules.

No single strategy works for everyone. The objective is to coordinate the available tools with your income needs, tax situation, health considerations, and long-term goals.

What If Your Income Has Already Dropped?

If you've retired, reduced your working hours, or experienced another qualifying life-changing event, your Medicare premiums might still reflect income earned before that change.

In certain situations, Social Security allows you to request a new IRMAA determination using Form SSA-44.

You can learn more directly from the Social Security Administration.

This is a practical step that may be relevant before considering more complex planning strategies.

A Practical Planning Sequence

A useful review can begin with the following questions:

1. What income sources will you have in each retirement year?
2. Which sources are taxable, tax-deferred, or generally excluded from taxable income?
3. When will required minimum distributions begin?
4. How might Social Security, Roth conversions, investment gains, or large withdrawals affect Medicare premiums two years later?
5. Do you have sufficient liquidity for unexpected expenses without relying on one account?
6. If considering IUL, does the insurance need exist independently of the potential tax treatment?
7. What assumptions, costs, loan terms, and lapse risks apply to the proposed policy?

These questions do not replace individualized advice, but they can help organize the conversation with your CPA, tax advisor, and appropriately licensed financial or insurance professional.

Organizing Your Next Steps

At DIY Wealth Planning, we believe financial education should help you understand your choices without replacing individualized analysis.

If you are still in the accumulation phase, the free Milestone Allocator™ is the logical first tool to run. It segments your current income into a three-tier capital blueprint — liquid runway, milestone savings, and long-term equity — and flags Backdoor Roth IRA eligibility based on your income and filing status. Keeping your Tier 3 equity in tax-advantaged accounts now is one of the most direct ways to reduce the MAGI that drives IRMAA surcharges later.

Our complimentary Financial Command Center™ helps organize financial decisions through six guided modules.

You can begin with the Cube Wealth Readiness Engine™, a five-minute assessment covering six financial pillars.

Then explore Create My Retirement Paycheck™, supported by our Retirement Paycheck Snapshot, Retirement Income Gap Estimator, and Social Security Break-Even Calculator.

The Build My Wealth module introduces saving, budgeting, debt reduction, and wealth-building concepts.

Protect My Family & Legacy helps organize financial protection questions and essential family documents.

The What-If Scenario Explorer lets you explore the potential impact of changing selected financial assumptions.

And My 90-Day Wealth Progress Tracker™ helps translate goals into manageable next steps.

These complimentary tools are not designed to calculate exact Medicare IRMAA exposure, model an IUL policy, or replace individualized tax or insurance analysis.

Instead, they can help you organize information and identify questions worth discussing with the appropriate professional.

Prefer assistance navigating the website?

CUBI, our digital concierge, can help direct you toward relevant tools and resources.

Build a Retirement Paycheck, Not Just a Retirement Balance

A successful retirement is not measured solely by the size of your investment accounts.

It is also measured by how effectively your resources support the life you've worked to build.

Traditional retirement accounts, Roth accounts, Social Security, savings, pensions, and appropriately selected insurance solutions can each serve different purposes.

Some generate income. Some provide protection. Some offer liquidity. Some provide potential tax advantages.

The objective is not to own every financial product available. It is to understand how the right pieces might fit together for your family.

Next Steps

Whether you're approaching retirement or already retired, begin by organizing your income sources, account types, expected withdrawals, and Medicare-related questions.

Explore My Free Financial Command Center™

Want help organizing your retirement-income priorities, understanding your financial picture, or creating an actionable roadmap?

Cube Wealth Dimensions offers optional Foundations, Builder, and Accelerator coaching programs focused on financial education, organization, and accountability.

Interested specifically in Indexed Universal Life insurance, retirement protection, or a review of an existing policy?

Insurance-related discussions and needs assessments are available separately through Cube Insurance Group, subject to licensing, suitability, and underwriting considerations.

Schedule My Complimentary 30-Minute Discovery Consultation

Your retirement. Your money. Your decisions.

Our mission is to help make the complex simple.

DIY Wealth Planning — Making the Complex Simple™

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Related Reading

• High Income, No Wealth: The HENRY Trap — How high earners can restructure their capital to reduce tax drag and IRMAA exposure over time.
• Social Security at 62, 67, or 70? Find Your Break-Even Age — Claiming age directly affects your MAGI in early retirement. Understand the interaction before you decide.
• What Is Longevity Risk — and How Do You Plan for It? — IRMAA is one cost of a long retirement. This article covers the full picture of outliving your assets.
• 9 Small Financial Habits That Can Build Lasting Wealth — The behavioral foundation that makes tax diversification strategies stick.

Important Disclosures

This article is for general educational purposes and does not constitute individualized financial, investment, securities, tax, or legal advice.

Indexed Universal Life insurance is a permanent life insurance product. Policy values, available loans, and death benefits depend on policy provisions, premiums, fees, mortality charges, credited interest, and outstanding policy indebtedness. Non-guaranteed illustrations are not promises of future performance.

Policy loans accrue interest, can reduce the policy's available cash value and death benefit, and may increase lapse risk. Loans and distributions from Modified Endowment Contracts may be taxable, and certain taxable distributions before age 59½ may incur an additional 10% federal tax. Lapse or surrender with an outstanding loan can result in taxable income.

Any benefits associated with tax diversification or Medicare premium planning depend on individual circumstances and applicable law. A life insurance policy should not be purchased solely on the expectation of reducing IRMAA.

DIY Wealth Planning provides self-directed financial education. Cube Wealth Dimensions provides optional coaching services. Insurance products and related services are offered separately through Cube Insurance Group. Compensation, service scope, and applicable disclosures should be reviewed before engaging in any paid service or insurance transaction.

Consult your CPA, qualified tax advisor, and appropriately licensed financial and insurance professionals before making major financial decisions.

Official references: CMS Medicare Premiums | SSA IRMAA Income Rules | Internal Revenue Code §72 | NAIC Life Insurance Information