What is the Income Related Monthly Adjustment Amount (IRMAA) for Medicare?

Did you know that earning a higher income could mean paying more for your Medicare coverage? If your income exceeds certain thresholds, the federal government tacks a surcharge onto your Part B (Medical) and Part D (Prescription Drug) premiums. This high-income surcharge is known as the Income-Related Monthly Adjustment Amount, or simply IRMAA.

Whether you're currently paying IRMAA or nearing a tax bracket that could trigger it, understanding how this surcharge works is a crucial part of managing your retirement finances.

What is the Income Related Monthly Adjustment Amount (IRMAA)?

IRMAA is a mandatory premium surcharge added directly to the standard Medicare Part B and Part D monthly bills. It is important to note that IRMAA only impacts your premiums. It does not affect other Medicare costs, meaning it won't change your Part A costs, your Part C (Medicare Advantage) base premium, or your copayments and deductibles at the doctor's office.

The Social Security Administration (SSA) decides if you owe IRMAA based entirely on your Modified Adjusted Gross Income (MAGI). Because recent tax returns take time to process, the SSA looks at your tax data from two years prior. For example, your 2026 IRMAA status is determined by the income you reported on your 2024 tax return.

To give you a historical baseline, the following 2020 income levels triggered IRMAA for the 2022 calendar year:

• A single taxpayer whose MAGI exceeded $91,000
• A married couple filing jointly whose MAGI exceeded $182,000
• A married individual filing separately whose MAGI exceeded $91,000

Because income brackets adjust with inflation, the SSA recalculates your IRMAA exposure every single year. If your income drops back below the threshold, the surcharge drops off your bill. Conversely, your IRMAA tier can shift up or down annually depending on your financial activity.

If you trigger IRMAA, the SSA will mail you a "pre-determination notice." You have ten days to contact the SSA if you spot a glaring error. Afterward, you will receive an official "initial determination notice" confirming your new premium amount.

How does IRMAA affect your premiums?

Part B Premium

Most beneficiaries pay the standard monthly premium for Medicare Part B, which is $202.90 (for 2026). However, if you are subject to IRMAA, your Part B premium will be notably higher.

The SSA uses a sliding scale based on your exact MAGI and tax filing status. As you cross higher income thresholds, your monthly premium increases accordingly.

Part D Premium

IRMAA also applies to Part D. Whether you buy a standalone prescription drug plan to pair with Original Medicare or you have drug coverage bundled into a Medicare Advantage plan, you are subject to the surcharge.

How do you pay for IRMAA?

Your extra premium amounts are not billed by your private insurance company; they are owed directly to the federal government.

If you are already drawing retirement benefits from Social Security or the Railroad Retirement Board, your IRMAA surcharges are automatically deducted from your monthly check.

If you have not started drawing retirement benefits yet, Medicare will send you a monthly bill. You can pay this bill directly from your bank account, via Medicare Easy Pay, with a credit card, or by mailing a physical check.

Be aware: if a former employer or union pays your standard Part D or Medicare Advantage (Part C) premiums on your behalf, they generally do not pay your IRMAA. You are personally responsible for paying the IRMAA portion directly to Medicare.

Do not ignore this bill. Failing to pay your IRMAA will result in the total cancellation of your Part B and Part D coverage.

How can you appeal an IRMAA determination?

Because IRMAA is based on two-year-old tax data, the SSA's assessment might not reflect your current financial reality. You have the legal right to appeal an IRMAA determination under two specific circumstances: a recognized life-changing event, or a tax-related miscalculation.

Life-Changing Event

If your income has plummeted since that two-year-old tax return, you shouldn't be penalized. You can request an IRMAA reduction or removal if you experienced one of these eight qualifying life-changing events:

• Marriage
• Divorce or annulment
• The death of your spouse
• Work stoppage (retirement)
• Work reduction (scaling back hours)
• Loss of income-generating property due to a natural disaster or fraud
• Loss or drastic decrease of pension income
• An employer settlement payment resulting from bankruptcy or reorganization

To appeal based on these events, you must file Form SSA-44. Be prepared to provide concrete documentation, such as a marriage certificate, a death certificate, or official pay stubs reflecting your reduced income.

Tax-Related Adjustments

Sometimes, the data is just wrong. You can appeal if:

• The IRS simply fed incorrect data to the SSA.
• The SSA utilized tax data that is older than the standard two-year lookback.
• You filed an amended tax return for the year in question, lowering your MAGI below the threshold.

You will need to provide a signed copy of your tax return or an official IRS transcript to support your claim. If the SSA denies your initial appeal, you have the right to escalate the issue to a formal hearing before the Office of Medicare Hearings and Appeals (OMHA).

Are there other factors that could impact your IRMAA?

Because IRMAA is strictly tied to your MAGI, proactive financial planning can literally save you thousands of dollars in Medicare premiums.

Keep these strategies in mind:

• Understand RMDs: The Secure Act pushed the age for Required Minimum Distributions (RMDs) to 72. Delaying withdrawals from your 401(k) or traditional IRA keeps that money out of your taxable income, potentially keeping you under the IRMAA threshold.
• Watch your capital gains: A massive one-time influx of cash—like selling a piece of real estate or cashing out a booming stock—will dramatically spike your MAGI for that year, almost certainly triggering IRMAA two years later.
• Leverage Health Savings: Contributing to a Medicare Savings Account (MSA) or Health Savings Account (HSA) lowers your taxable income. Furthermore, withdrawals from these accounts are tax-free when spent on qualified medical expenses.
• Consider charitable donations: If you do not need your RMD to fund your lifestyle, consider executing a Qualified Charitable Distribution (QCD). Sending the funds directly to a charity keeps the distribution entirely out of your MAGI.
• Explore tax-free income: Drawing funds from a Roth IRA or utilizing a reverse mortgage provides cash flow without increasing your taxable income.

Final Words

While IRMAA surcharges can take a painful bite out of your retirement budget, they do not have to be a permanent sentence. By actively managing your taxable income and appealing unfair determinations when your life circumstances change, you can keep your Medicare premiums as low as legally possible. At NerdWallet, we empower you to take control of your financial health—so you can focus on enjoying the retirement you worked so hard to build.