Medicare Part B Premium Calculator
Calculate Medicare Part B premium with IRMAA surcharge by income.
By Konstantin Iakovlev · Updated April 2026 · Source: CMS — Centers for Medicare & Medicaid Services
Monthly Premium
$202.90
Annual Cost
$2,434.80
Part B Premium
| Base Premium | $202.90 |
| IRMAA Surcharge | $0.00 |
| Monthly Total | $202.90 |
| Annual Total | $2,434.80 |
Use the Medicare Part B Premium Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
For 2026, your monthly Medicare Part B cost may be more than the standard premium, because higher earners pay an Income-Related Monthly Adjustment Amount (IRMAA) surcharge on top of it. Since this single line item lands in your budget every month, estimating it in advance makes retirement planning far steadier, and the figures here are tailored to the income you report rather than a one-size-fits-all number.
The amount you owe hinges on your Modified Adjusted Gross Income (MAGI) from two years earlier, which for the 2026 premium means your 2024 return. The calculator takes that MAGI, runs it through the official 2026 IRMAA brackets, and adds the matching surcharge to the standard premium to arrive at your total estimated monthly cost.
Because the 2026 calculation looks back to 2024, any income swings since then will not yet show up, which can cut either way once Social Security recalculates. Capture every income source when you tally your MAGI, since even tax-exempt interest counts toward the IRMAA thresholds. The surcharge itself is the piece most people overlook, and missing it can leave you underestimating your real Part B premium by a wide margin.
Example: High Earning Couple's 2026 Part B Premium
- 1 **Step 1: Input Modified Adjusted Gross Income (MAGI)** John and Jane Smith, a married couple filing jointly, had a 2024 MAGI of $400,000. They want to calculate their individual 2026 Medicare Part B premiums.
- 2 **Step 2: Apply 2026 IRMAA Brackets** For a MAGI of $400,000 (married filing jointly), their income falls into the 2026 IRMAA bracket of $338,001 to $422,000. The standard 2026 Part B premium is $174.70. For this bracket, the IRMAA surcharge is an additional $349.40, making their total individual premium $524.10 ($174.70 + $349.40).
- 3 **Step 3: Calculate Total Monthly Premium** Each spouse will pay $524.10 per month for their Medicare Part B premium in 2026.
- 4 **Step 4: Context and Impact** This example shows how a higher income can lead to a substantial increase in Medicare Part B premiums due to IRMAA. For John and Jane, their combined monthly Part B premium will be $1,048.20, significantly more than the standard premium. This highlights the importance of understanding IRMAA for retirement budgeting.
Source: CMS — Centers for Medicare & Medicaid Services · Last updated: April 2026
Frequently Asked Questions
What is the standard Medicare Part B premium for 2026?
What is IRMAA and when does it apply?
Can I appeal a Medicare IRMAA surcharge?
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