What IRMAA is
IRMAA stands for Income-Related Monthly Adjustment Amount — an extra charge added to your Part B and Part D premiums when your Modified Adjusted Gross Income (MAGI) exceeds certain thresholds. There are five surcharge tiers above the standard premium, and they apply to both Part B and Part D.
The catch that surprises people: Social Security uses your income from two years ago. Your 2026 premiums are set from your 2024 tax return — the "look-back."
2026 IRMAA brackets
The standard 2026 Part B premium is $202.90/month. If your 2024 MAGI was above the thresholds below, you pay the higher Part B premium plus a Part D add-on. Each spouse on Medicare pays individually, even though the thresholds use your joint income.
| 2024 MAGI (Individual / Joint) | Part B / month | Part D add-on |
|---|---|---|
| Up to $109,000 / $218,000 | $202.90 | $0.00 |
| $109,001–$137,000 / $218,001–$274,000 | $284.10 | +$14.50 |
| $137,001–$164,000 / $274,001–$328,000 | $395.00 | +$37.30 |
| $164,001–$205,000 / $328,001–$410,000 | $506.00 | +$60.10 |
| $205,001–$500,000 / $410,001–$750,000 | $617.00 | +$82.90 |
| Above $500,000 / $750,000 | $689.90 | +$91.00 |
A quick example
A married couple with $300,000 in joint MAGI lands in the second tier. Each spouse pays $395.00/month for Part B plus a $37.30 Part D add-on — about $5,187.60 extra for the couple over the year. IRMAA surcharges rose roughly 9% from 2025 to 2026, so the stakes keep climbing.
What counts toward MAGI — and what doesn't
Because IRMAA is a set of cliffs, a single dollar over a threshold moves you up a whole tier. Knowing which income sources count is how you plan around them.
- Counts (raises IRMAA): wages, traditional IRA/401(k) withdrawals, Roth conversions (in the conversion year), capital gains, rental and pension income, the taxable portion of Social Security, and tax-exempt municipal-bond interest.
- Does not count (safe): qualified Roth IRA withdrawals, HSA distributions for medical costs, Qualified Charitable Distributions (QCDs), veterans' disability benefits, life-insurance proceeds, reverse-mortgage payments, gifts, and inheritances.
How to appeal after a life change
If a qualifying life event lowered your income, you can ask Social Security to use your current income instead of the two-year-old return by filing Form SSA-44. Qualifying events include retirement or reduced work, marriage or divorce, the death of a spouse, loss of a pension, or loss of income-producing property.
You have 60 days from the date on your IRMAA notice to file. Gather proof of the event, complete SSA-44 (from ssa.gov), submit it to Social Security, and they'll recalculate — sometimes retroactively with a refund. Many people who qualify never file; we'll tell you whether an appeal is likely to succeed and help with the paperwork.