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IRMAA and Roth Conversion Calculator Limits

Learn why Medicare IRMAA can matter when Roth conversion income increases taxable income, and how the calculator's bounded proxy previews differ from SSA billing determinations.

Calculator limit

The calculator provides bounded 2026 Part B and Part D IRMAA proxy previews, but final IRMAA billing requires separate SSA and Medicare review.

A Roth conversion can increase current-year taxable income, which may be relevant to Medicare income-related monthly adjustment amount discussions.

The calculator focuses on federal income tax, user-entered state tax, penalty assumptions, projection math, and bounded 2026 IRMAA proxy previews; it does not calculate SSA billing determinations or plan-specific Medicare premiums.

Users near Medicare age or already enrolled in Medicare should treat IRMAA as a separate review item with a qualified professional.

Official reference

Review the official source and then discuss the interaction with a qualified professional.

Medicare.gov IRMAA information

This Roth Conversion Calculator is for educational and illustrative purposes only. It does NOT constitute tax, financial, legal, or investment advice. The calculation results are based on the information you provide and the latest IRS tax rules, which are subject to change. We do not guarantee the accuracy of the results. Please consult a licensed Certified Public Accountant (CPA), financial advisor, or tax professional before making any financial decisions.