Medicare IRMAA Calculator

Will you pay more for Medicare because of your income? Use this free IRMAA calculator to find out if you’ll owe extra. 

1. Look at your taxes from two years ago. So for 2026, you’ll use 2024. 

2. Select your tax filing status: individual or joint.

3. Select your income bracket from two years ago based on how much money you made.

Now, you’ll see two sections for Part B and Part D.

Part B IRMAA Surcharge: 

We have supplied a standard Part B premium to demonstrate the IRMAA surcharge. The calculator’s total Part B Premium shows how much we estimate you will pay per month. 

However, this is just an estimate, and you may pay more or less for Part B depending on your circumstances or penalties. Please contact us for specifics. 

Part D IRMAA Surcharge: 

If you know your Part D premium (how much you pay monthly), including any late enrollment fees, click the button that says “yes.” Then enter how much you pay for Part D every month.

If you don’t know, that’s OK, we will show you a standard rate for demonstration purposes. 

Your Part D Explained shows your premium (either what you entered or an estimate), the IRMAA Part D surcharge, and the total. 

Once again, this is just an estimate, and you may pay more or less for Part D depending on your circumstances. Please contact us for specifics. 

How the IRMAA Surcharge Works

The Income-Related Monthly Adjustment Amount (IRMAA) is a surcharge, not a penalty. Higher-income Medicare beneficiaries pay this surcharge, in addition to their standard Part B and Part D premiums. 

In 2026, the standard Part B premium is $202.90. Medicare determines your IRMAA based on your modified adjusted gross income (MAGI) from two years prior, so your 2024 tax return sets your 2026 premiums. 

IRMAA is reassessed every year based on your tax return from two years prior and is temporary and income-dependent. IRMAA is not a penalty, but a sliding-scale surcharge that adjusts with your income year to year. 

Social Security uses your Modified Adjusted Gross Income (MAGI) for income. MAGI is the sum of your adjusted gross income (AGI) (found on line 11 of the Internal Revenue Service (IRS) tax filing form 1040), plus your tax-exempt interest income (line 2a of IRS Form 1040).

If your income drops — whether from retirement, reduced work hours, or another life event — your IRMAA surcharge can decrease or go away entirely once your MAGI falls below the threshold. If your income recently dropped due to retirement, the loss of a spouse, or another life-changing event, you may be able to appeal for a lower amount.

This tool offers an estimate only and may not be accurate for your situation. To learn more about the IRMAA fee and ways you might avoid it, contact me.