Medicare IRMAA Surcharge Calculator
Estimate total Medicare income-related monthly adjustment surcharges for a household.
Last updated: July 27, 2026
Estimated IRMAA cost
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- Monthly household surcharge: —
- Part B surcharge total: —
- Part D surcharge total: —
On this page
Quick summary: Estimate total Medicare income-related monthly adjustment surcharges for a household.
Read the complete guide
What this calculator estimates
Estimate total Medicare income-related monthly adjustment surcharges for a household. It runs locally in the browser and is intended for planning and comparison.
How to use it
Enter the requested values, select Calculate, review the headline result and supporting figures, then change one input at a time to compare scenarios.
How the calculation works
Entered Part B and Part D surcharges are multiplied by people and months, less an optional appeal reduction.
Input checklist
The Medicare IRMAA Surcharge Calculator uses the values shown in its form. Before calculating, check each input independently so an incorrect unit or time period does not carry through to the final result.
- Monthly Part B IRMAA per person ($): verify that this value uses the unit, period, and definition shown by the calculator.
- Monthly Part D IRMAA per person ($): verify that this value uses the unit, period, and definition shown by the calculator.
- People subject to IRMAA: verify that this value uses the unit, period, and definition shown by the calculator.
- Months charged: verify that this value uses the unit, period, and definition shown by the calculator.
- Expected monthly reduction after appeal ($): verify that this value uses the unit, period, and definition shown by the calculator.
Practical interpretation
Use the Medicare IRMAA Surcharge Calculator result as the answer to the specific inputs entered, not as a universal value. The calculation currently described on this page is: Entered Part B and Part D surcharges are multiplied by people and months, less an optional appeal reduction. Change one important input at a time when comparing scenarios so you can see which assumption actually drives the difference.
Checks before relying on the result
Tax rules, thresholds, deductions, and filing treatment can vary by year and jurisdiction, so compare the estimate with current official guidance before using it for filing or withholding decisions. Recalculate when a key value changes, and keep the original inputs with the result if you need to reproduce or compare the calculation later.
Important limitations
Use current SSA/CMS notices; brackets and surcharges can change annually and appeals depend on qualifying events.
Frequently asked questions
Is this result exact?
No. It is an adjustable planning estimate based on the values entered and the method described above.
Can I enter Arabic or Persian digits?
Yes. Numeric fields normalize Arabic and Persian digits to English digits.
Does the calculator store my inputs?
No. The calculation runs locally in your browser and does not require an account.