Medicare IRMAA Brackets 2026: Income Limits, Surcharges and Appeals

What IRMAA Is and Why It Matters

IRMAA stands for the Income-Related Monthly Adjustment Amount. It is an extra charge that Medicare adds on top of the standard Part B and Part D premiums for beneficiaries whose income exceeds certain thresholds. The standard 2026 Part B premium is $202.90 per month, an increase of $17.90 from $185.00 in 2025, but higher-income retirees can pay significantly more because of IRMAA surcharges.

The surcharge applies to both Medicare Part B (medical insurance) and Part D (prescription drug coverage). It is assessed per person, so a married couple where both spouses are enrolled in Medicare can each owe IRMAA on their own premiums. That is one reason the yearly cost can climb into the thousands very quickly. For a fuller picture of what standard Medicare costs in 2026, our overview of Medicare Part A and Part B breaks down every deductible and coinsurance amount.

The 2026 IRMAA Brackets for Part B and Part D

For 2026, Social Security uses your 2024 modified adjusted gross income (MAGI) to decide which bracket you fall into. Both Part B and Part D use the same income brackets, though the surcharge dollar amounts differ.

2026 IRMAA Income Brackets and Surcharges

At the top tier, a single retiree pays $487.00 per month more in Part B alone. Combined with the Part D surcharge, a married couple in higher tiers can pay well over $10,000 per year just in IRMAA on top of their regular premiums and their Part D prescription drug plan.

Married Filing Separately

If you file married-separately and lived with your spouse during the year, the brackets are compressed into just three tiers: $0 IRMAA at or below $109,000, a $446.30 Part B surcharge (plus $83.30 for Part D) between $109,001 and $390,999, and the top surcharge of $487.00 (plus $91.00 for Part D) once MAGI reaches $391,000. This filing status usually produces the harshest IRMAA outcome.

How the Two-Year MAGI Lookback Works

Social Security does not use your current income to calculate IRMAA. Instead, it uses the most recent federal tax return the IRS has on file, which is typically two years prior to the premium year. So your 2026 premiums are based on your 2024 tax return.

What Counts in MAGI

For IRMAA, MAGI equals your Adjusted Gross Income (AGI) plus tax-exempt interest (such as municipal bond interest). That includes:

• Wages, self-employment income, and pension payments
• Traditional IRA and 401(k) withdrawals (including Roth conversions)
• Interest, dividends, and realized capital gains
• The taxable portion of Social Security benefits
• Rental and business income
• Tax-exempt municipal bond interest (added back)

Roth IRA and Roth 401(k) withdrawals, HSA distributions used for qualified medical expenses, and QCDs do not count toward MAGI. That is why account "location" and withdrawal sequencing matter so much once you approach Medicare age.

First-Year Medicare Surprises That Trigger IRMAA

The most common IRMAA "gotchas" almost always trace back to normal, sensible financial moves that happened to inflate income two years earlier. Watch out for these triggers as you approach 65:

• Roth conversions stacked into a single year, especially large ones
• Big IRA or 401(k) withdrawals to buy a car, pay off a mortgage, or help family
• Capital gains from rebalancing a portfolio or selling appreciated stock
• Sale of a home, business, or rental property that generates a taxable gain
• Severance pay, deferred compensation, or exercised stock options in your final working year
• Required Minimum Distributions (RMDs) stacked on top of pensions and Social Security (RMDs currently begin at age 73 under SECURE 2.0, moving to 75 for those born in 1960 or later)

The frustrating part: by the time the Social Security IRMAA notice arrives, the tax year that caused it is already closed. You cannot "undo" the triggering income, though you may be able to appeal (more on that below).

How IRMAA Interacts With Medigap Planning

IRMAA affects your Medicare premium costs, but it does not change how Medigap plans work or what they cost. Medigap premiums are set by private insurers and are the same whether you are in the base IRMAA bracket or the top one. However, IRMAA and Medigap planning are linked in two important ways.

First, when you add IRMAA on top of a Medigap premium, your total monthly outlay for Medicare can rise sharply. High-income retirees who initially picked a leaner plan sometimes reconsider once they see the full annual cost of Part B + Part D + Medigap + IRMAA. Learn more about what a Medicare Supplement plan costs in 2026.

Second, if IRMAA is squeezing your budget, choosing a lower-premium plan may make sense. Comparing Plan G and Plan N, or looking at High-Deductible Plan G, can offset some of the surcharge without giving up meaningful protection.

Appealing IRMAA With a Life-Changing Event (SSA-44)

If your income has dropped since the tax year SSA is using, you may be able to appeal. The tool is Form SSA-44, and it only works if you have experienced one of eight specific life-changing events:

1. Work stoppage (retirement or job loss)
2. Work reduction (significant cut in hours or pay)
3. Loss of income-producing property due to disaster, disease, fraud, theft, or arson (voluntary sales do not count)
4. Loss or reduction of pension income
5. Marriage
6. Divorce or annulment
7. Death of a spouse
8. Employer settlement payment from bankruptcy, reorganization, or closure

How to File Form SSA-44

Wait until you receive your official IRMAA determination letter, then complete SSA-44. On the form you will:

1. Select one life-changing event and the date it occurred
2. Enter the first tax year your income will be lower because of the event
3. Provide your estimated AGI and tax-exempt interest for that year
4. Attach proof of the event (employer letter, marriage certificate, divorce decree, death certificate, etc.)
5. Attach evidence of the reduced income (tax return, pay stubs, or a signed estimate)

Fax, mail, or hand-deliver the completed packet to your local Social Security office. Keep copies of everything. If you have not heard back after 30 to 45 days, follow up politely.

Strategies to Reduce MAGI and Avoid IRMAA

Because IRMAA thresholds are cliffs and the lookback is two years, the best planning happens before the surcharge is triggered. Here are the tactics that give retirees the most control:

Time Roth Conversions Around the Brackets

Roth conversions raise MAGI in the conversion year but produce tax-free withdrawals later that do not count toward MAGI. The sweet spot is often the "gap years" between retirement and age 73 RMDs, when your income is naturally lower.

• Convert just enough each year to fill up the room below the next IRMAA bracket
• Execute conversions in late December so you can see actual dividends, gains, and other income first and dial the conversion amount precisely
• Spread conversions across several years instead of one big year

Use Qualified Charitable Distributions (QCDs)

Once you are 70½, you can send up to $111,000 per person in 2026 directly from your IRA to a qualified charity (a married couple with separate IRAs can donate up to $222,000). QCDs are excluded from MAGI entirely and can satisfy your RMD, which is one of the most powerful IRMAA-reduction tools available. In 2026, you can also use up to $55,000 of that annual limit for a one-time QCD to a charitable remainder trust or charitable gift annuity.

Smooth Out Withdrawals

Instead of a single large IRA withdrawal for a big purchase, spread the withdrawal across two or more tax years to avoid crossing a bracket. Pair pre-tax withdrawals with Roth or taxable-account draws in high-income years.

Manage Capital Gains and Losses

Harvest capital losses in taxable accounts to offset gains. Consider donating appreciated stock (through a Donor Advised Fund) rather than selling and giving cash.

Delay Social Security if It Helps

Delaying Social Security into your late 60s not only boosts your future benefit but also keeps MAGI lower during the years you may be doing Roth conversions.

What to Expect Each Year

Once you are enrolled, Social Security automatically re-evaluates your IRMAA status every year using the newest tax return the IRS has on file. If your 2025 return shows lower income, your 2027 premiums should drop back to standard levels without any action from you.

You will receive a written notice from Social Security each year confirming your Part B and Part D premium amounts. Read it carefully. If you believe SSA used the wrong tax year, used incorrect data, or you had a qualifying life-changing event, that is your window to appeal. If you are still weighing your overall Medicare strategy, our guide to Medigap vs. Medicare Advantage can help you decide which path fits best with an IRMAA-affected budget.

Frequently Asked Questions

Does IRMAA apply if I have a Medicare Advantage plan instead of Original Medicare?

Yes. IRMAA is tied to Medicare Part B and Part D premiums, not to whether you choose Original Medicare with Medigap or Medicare Advantage. Even if your Advantage plan has a $0 premium, you still pay Part B, and any IRMAA surcharge on Part B and Part D is added on top.

Can I appeal IRMAA if I just had a big one-time capital gain?

Generally no. A voluntary sale of stock, a home, or a business is not one of the eight qualifying life-changing events on Form SSA-44. Even if the gain was truly one-time, SSA will not remove the surcharge based on that alone. Planning to spread or offset such gains before they hit your tax return is the more effective approach.

Are Roth conversion amounts counted in MAGI for IRMAA?

Yes. The full converted amount is treated as taxable income in the year of the conversion and flows into your AGI. That means a large Roth conversion in 2026 could raise your Medicare premiums in 2028. The upside is that future Roth withdrawals are excluded from MAGI, so conversions can lower IRMAA exposure in later years.

Will the IRMAA brackets change in 2027?

The brackets are indexed to inflation and are typically announced by CMS each November. The 2027 IRMAA brackets are expected to increase modestly from the 2026 levels published here, but the structure (five surcharge tiers plus the highest bracket) will almost certainly remain the same.

What happens if I turn 65 in the middle of the year?

Your first year on Medicare uses the same two-year lookback rule as everyone else. If your MAGI two years ago was high (due to your final working year, for example), you may owe IRMAA right out of the gate. This is exactly the situation Form SSA-44 was designed for, since retirement itself is a qualifying life-changing event.