2025 Irmaa Brackets Based On 2024 Income. Medicare participants with an income above the threshold must pay a surcharge based on their income. Here’s a detailed look at how your income.
The social security administration determines irmaa based on your tax return, and if applicable, you will receive an irmaa letter notifying you of the increased premium amount. The 2025 irmaa brackets are determined by the centers for medicare & medicaid services (cms) and are based on income levels.