Medicare Part D Premium Calculator

Calculate Medicare Part D IRMAA surcharge by income.
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$

Monthly Premium

$35.00

Annual Drug Cost

$420.00

Part D Cost

Plan Premium$35.00
IRMAA Surcharge$0.00
Monthly Total$35.00

Use the Medicare Part D 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

This calculator helps you estimate your Medicare Part D Income-Related Monthly Adjustment Amount (IRMAA) surcharge for 2026 based on your Modified Adjusted Gross Income (MAGI). Understanding your potential IRMAA is crucial for budgeting your healthcare costs, as it's an additional premium you pay on top of your standard Part D plan premium. This tool empowers you to proactively plan for these extra expenses and avoid surprises.

Your 2026 Part D IRMAA is determined by your MAGI from two years prior (typically your 2024 tax return). The Social Security Administration (SSA) uses a tiered system: if your MAGI exceeds certain thresholds, you'll pay an additional amount directly to Medicare. For 2026, the lowest IRMAA surcharge tier begins at a MAGI above $109,000 for individuals and $218,000 for those married filing jointly, with subsequent tiers increasing the surcharge incrementally.

Remember that this calculator provides an estimate; your actual IRMAA will be determined by the SSA based on your official tax filings. Be mindful of life changes like marriage, divorce, or significant income shifts, as these can impact your MAGI and, consequently, your IRMAA. Avoid underestimating your income, as this could lead to unexpected surcharges.

Example: Individual with a MAGI of $130,000

  1. 1 Enter your 2024 Modified Adjusted Gross Income (MAGI). For this example, let's use $130,000. Indicate your tax filing status as 'Individual'.
  2. 2 Based on the 2026 IRMAA thresholds, a MAGI of $130,000 for an individual falls into the tier above $109,000 to $136,000. For this tier, the estimated 2026 Part D IRMAA surcharge is $12.90 per month.
  3. 3 Your estimated 2026 Medicare Part D IRMAA surcharge is $12.90 per month.
  4. 4 This $12.90 per month will be added to your standard Medicare Part D plan premium. Over a year, this totals an additional $154.80 for your prescription drug coverage. This amount is paid directly to Medicare, not your Part D plan provider.

Source: CMS — Centers for Medicare & Medicaid Services · Last updated: April 2026

Frequently Asked Questions

How much is the Medicare Part D IRMAA surcharge?
Part D IRMAA surcharges in 2026 range from about $13 to $81 per month on top of your plan premium, depending on your income bracket. The same income thresholds that trigger Part B IRMAA also apply to Part D.
Is the Part D IRMAA based on current income?
No. Like Part B, the Part D IRMAA is based on your modified adjusted gross income from two years prior. Your 2024 tax return determines your 2026 surcharge.
Do Part D IRMAA surcharges change every year?
Yes. The surcharge amounts and income thresholds are adjusted annually. You receive a notice from Social Security each fall if you are subject to IRMAA for the coming year.

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