IRMAA: Income-Related Monthly Adjustment Amount

What is it

  • An additional premium added to your Medicare Part B and Part D coverage
  • Based on your income from two years prior (2026 premiums use 2024 income)
  • Determined by Social Security using your Modified Adjusted Gross Income (MAGI)

Who it effects

  • Individuals with higher income enrolled in Medicare Part B and/or Part D
  • Applies whether coverage is through traditional Medicare or Medicare Advantage
  • Based on tax filing status (Single or Married Filing Jointly)

How it work

  • Social Security reviews your tax return from two years ago
  • If income exceeds certain thresholds, a surcharge is added to your monthly premiums
  • IRMAA is recalculated annually

2026 IRMAA Table for Part B &D

2024 MAGI (SINGLE) 2024 MAGI (JOINT) PLAN B SURCHARGE PLAN D SURCHARGE
≤ $109,000 ≤ $218,000 $0 $0
> $109k - $137k > $218k - $274k +$81.20 +$14.50
> $137k -$171k > $274k - $342k +$202.90 +$37.50
> $171k - $205k > $342k - $410k +$324.60 +$60.40
> $205k - $500k > $410k - $750k +$446.30 +$83.30
≥ $500,000 ≥ $750,000 $487.00 +$91.00

Example

If a married couple has 2024 MAGI of $230,000, each spouse would pay an additional $81.20 per month for Part B and $14.50 per month for Part D in 2026, in addition to the standard premiums.

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