Medicare IRMAA Calculator 2026: Find Your Surcharge and the Real Cost of One Extra Dollar

IRMAA is the only tax in America that can charge you $1,148 a year for earning one extra dollar. It is the income-related monthly adjustment amount added to Medicare Part B and Part D premiums once modified adjusted gross income climbs past $109,000 for a single filer or $218,000 for a joint return. Because IRMAA is a cliff and not a phase-in, the surcharge does not grow with your income — it appears all at once, in full, for twelve straight months. This calculator prices that cliff for your household, shows what the next bracket would cost, and sizes the tax-free life insurance benefit that covers the bill without adding a single dollar to MAGI.

How the 2026 IRMAA brackets work

IRMAA is not a tax rate. It is a cost-share adjustment written into 42 U.S.C. 1395r(i): the standard Part B premium covers roughly 25 percent of the program’s projected cost per beneficiary, and the five surcharge tiers raise that share to 35, 50, 65, 80 and 85 percent. That is why the amounts are fixed dollar figures rather than percentages of your income, and why they do not scale with how far past the line you go.

The 2026 standard Part B premium is $202.90 per month with a $283 annual deductible, up from $185.00 and $257 in 2025. The first income threshold rose 2.8 percent to $109,000 for a single filer and $218,000 for a joint return. The top threshold of $500,000 single and $750,000 joint is frozen by statute through 2027, which is why a frozen ceiling combined with indexed lower brackets slowly pushes more retirees into the top tier each year.

Two structural details decide what you actually pay. First, IRMAA is charged per person even though the tier is set by household income. A couple in Tier 1 pays the surcharge twice, so the household cost of the first cliff is $2,296.80 a year, not $1,148.40. Second, the Part D surcharge is charged on top of whatever your drug plan costs and is paid to Medicare, not to the insurer, so switching to a cheaper Part D plan does not remove it.

What counts toward MAGI for IRMAA, and what does not

Social Security reads the modified adjusted gross income reported on the return filed two years earlier. For IRMAA purposes MAGI is adjusted gross income plus tax-exempt interest — nothing else. That definition is narrower than taxable income and it is the source of most planning mistakes, because deductions taken below the AGI line do nothing to reduce it.

IRMAA MAGI: what is counted and what is invisible

Income or receipt	Counts in MAGI?	Why it matters
Wages, self-employment income, pension and annuity payments	Yes	Ordinary AGI components
Traditional IRA and 401(k) withdrawals, including RMDs	Yes	Every distribution dollar can cross a cliff
Roth conversion income	Yes	The most expensive kind of income to add near a threshold
Capital gains, dividends, taxable interest	Yes	A single fund sale can trigger a tier
Tax-exempt municipal bond interest	Yes	Added back even though it is federally tax-free
Life insurance death benefit paid to a named beneficiary	No	Excluded from gross income under IRC section 101(a)
Qualified Roth withdrawals and return of after-tax basis	No	Not includible in AGI
Qualified HSA distributions and qualified charitable distributions	No	Excluded from income when the rules are met

The practical consequence is that the usual deduction levers — itemizing, bunching charitable gifts, taking the standard deduction — lower your tax bill without lowering IRMAA by one dollar. Only income-side moves change the tier: delaying a Roth conversion, taking RMDs in kind, harvesting gains in a low-income year, or using qualified charitable distributions from an IRA at age 70½ and later.

Why your 2024 tax return sets your 2026 premium

The two-year lookback is the single most surprising feature of the program. Your 2026 premium is computed from the 2024 return, which means the planning window for any given year actually closes in the December two years before. Retirees who sell a rental property or convert an IRA at 63 find out at 65 that their first year on Medicare carries a surcharge they can no longer prevent — only appeal.

This also means a one-year income spike does not follow you forever. IRMAA is recalculated every year from the newest return available, so a single bad year produces a single year of surcharge unless the income level persists. That rolling structure is why the calculator is built around MAGI rather than around age: the same 66-year-old can sit in Tier 0 or Tier 4 depending entirely on a return filed 24 months earlier.

Married filing separately: the 5.5x IRMAA trap

A married couple that files separately and lived together at any point during the year loses the middle brackets entirely. There is no gradual climb through five tiers — one dollar above $109,000 jumps straight to the $649.20 Part B amount plus an $83.30 Part D surcharge. That is $6,355.20 per person per year, more than five times the single filer’s first-tier bill at the same income.

A spouse who lived apart from their partner for the entire lookback year is treated as a single filer and keeps the six-row table. If that describes your situation, the calculator’s filing-status menu already handles it: choose “Single / head of household” and enter your own MAGI. The distinction is documented in the SSA program operations manual, HI 01101.020.

The 2026 Medicare costs this surcharge sits on top of

2026 Medicare costs (CMS and Medicare.gov)

Item	2026 amount	Notes
Part A premium (most people pay nothing)	Up to $565 / month	Only with fewer than 40 work quarters
Part A hospital deductible	$1,736 per benefit period	Can apply more than once per year
Part A days 61–90	$434 / day	$868 per lifetime reserve day after day 90
Skilled nursing facility, days 21–100	$217 / day	First 20 days covered
Part B standard premium	$202.90 / month	Rises to $689.90 at the top IRMAA tier
Part B deductible	$283 / year	Up from $257 in 2025
Part D national base premium	$38.99 / month	IRMAA adds $14.50 to $91.00 on top

When you can appeal an IRMAA decision

Social Security will lower the surcharge if the income on the lookback return no longer describes your life. The request is filed on Form SSA-44 and only certain events qualify. A mistake on the return itself is handled differently, through a corrected return and an IRS data exchange, not through the life-changing-event form.

1. Confirm the tier on your Initial Determination notice and the exact MAGI Social Security used.
2. Identify a qualifying life-changing event: death of a spouse, marriage, divorce, work stoppage or reduction, loss of income-producing property, loss of pension, or an employer settlement payment.
3. Gather proof of the new income, such as a pay stub, a pension statement, or a letter documenting the retirement date.
4. File Form SSA-44 with your local office and keep the receipt; the reduction is prospective once approved.
5. If the request is denied, appeal within 60 days rather than waiting for the next annual recalculation.

The life insurance angle: tax-free dollars that never touch MAGI

Every other way of moving money into a retiree’s hands raises income: an IRA withdrawal, a pension payout, a Roth conversion, an annuity gain. A life insurance death benefit does not. Paid to a named beneficiary, it is excluded from gross income under IRC section 101(a), it never appears in AGI, and it therefore cannot push a surviving spouse into a higher IRMAA tier, a higher capital-gains bracket, or a higher tax bracket on Social Security benefits.

That property makes coverage a natural funding source for the Medicare costs a household will carry for the rest of its life. The calculator sizes that need as total household Medicare spending — Part B, both surcharges, and the drug plan — multiplied by the number of years you want covered, plus a $15,000 final-expense allowance, minus coverage you already own. The result is rounded up to the next $25,000 of face amount and priced on standard 20-year term rates.

For a 66-year-old male in standard health at the calculator’s default settings, that is $125,000 of coverage for roughly $85 a month — less than the Tier 1 surcharge the same household would pay for twelve months if a Roth conversion pushed it over the line. For readers still working, the same logic applies to group coverage that disappears at retirement; our guide to life insurance when changing jobs covers the portability question.

How to plan around the cliffs

The goal is not to stay poor. It is to stop paying a fixed annual penalty for income that arrives at the wrong time. Four moves do most of the work:

• Batch income into low-tier years. A Roth conversion or a capital gain spread over three years may cost nothing in IRMAA; the same total taken in one year can add $3,472.80 or more.
• Watch the top of your current bracket, not the bottom. The calculator’s headroom figure is the number that matters: it tells you how much more income you can report before the tier changes.
• Use qualified charitable distributions once you are 70½. A QCD moves money out of an IRA without adding to AGI, so it reduces both income tax and IRMAA exposure.
• Price the cliff against the gain. Crossing a threshold is rational when the income that triggers it is worth far more than the surcharge. The “excess for a 10% effective rate” column shows the break-even point at each line.

Term life rates used in this calculator

Premiums below are monthly rates for a $100,000 20-year term policy in standard health, non-tobacco, generated by the same engine the calculator uses. IRMAA-driven coverage needs are usually modest, which is why the chart uses $100,000 rather than the $500,000 face used in needs-based tools.

$100,000 20-year term, standard health, non-tobacco (monthly)

Age	Male	Female
60	$44.34	$32.68
65	$65.38	$47.31
70	$86.42	$61.95
75	$107.47	$76.59
80	$128.51	$91.22

Two related tools are worth running alongside this one. The life expectancy and coverage horizon calculator answers how many years of Medicare spending you are actually insuring, and the inherited IRA tax calculator prices the income-tax side of the same problem for your heirs. If the estate is large enough that estate tax is the bigger risk, the whole life cash value calculator shows what permanent coverage costs by comparison.

Watch the video: three IRMAA mistakes

This short walkthrough covers the two-year lookback, why MAGI is not taxable income, and the cliff mechanic that makes a one-dollar overshoot expensive.

Frequently asked questions

Does IRMAA apply to Medicare Advantage plans?

Yes. The Part B surcharge is attached to the Part B premium itself, so it applies whether you are in Original Medicare or a Medicare Advantage plan. The Part D surcharge also applies to a Medicare Advantage plan that includes drug coverage, because it is collected by Medicare rather than by the plan.

What MAGI does Social Security use for 2026?

Your 2024 return, specifically adjusted gross income plus tax-exempt interest. The thresholds are $109,000 for a single filer, $218,000 for a joint return, and $109,000 for a married-filing-separately return. Amounts exactly at a threshold stay in the lower tier; the surcharge begins one dollar above it.

Can I avoid IRMAA by dropping Part B?

Not without creating a larger problem. Declining Part B when you are first eligible triggers a late enrollment penalty of 10 percent of the standard premium for each 12-month period you waited, and that penalty lasts as long as you have Part B. Dropping Part D has a similar permanent penalty plus a gap in drug coverage.

Does a life insurance death benefit increase IRMAA for my spouse?

No. A death benefit paid to a named beneficiary is excluded from gross income under IRC section 101(a), so it is not part of AGI and cannot affect the survivor’s IRMAA tier. Interest the insurer pays on a delayed or installment payout, however, is taxable and does count.

Is IRMAA deducted from my Social Security check?

Usually. If you receive Social Security benefits, the Part B premium and both surcharges are withheld from the monthly payment. If you have not yet claimed benefits, Medicare bills you directly, typically quarterly, and the surcharge arrives on the same bill.

What happens if my income drops after retirement?

File Form SSA-44 and document the retirement date. Social Security treats work stoppage or a reduction in hours as a life-changing event and can reset the premium to the standard amount going forward. The reduction is not retroactive, so filing as soon as the change happens is worth real money.

Do Roth conversions count toward IRMAA?

Yes, and they are the most common cause of an avoidable surcharge. Conversion income is ordinary income reported in AGI, so it can move you one or more tiers in the year it is realized, and the effect lands on the premium two years later. Splitting a conversion across several years is usually cheaper than doing it once.

Sources and next steps

Premium and surcharge figures come from the CMS 2026 fact sheet and the Medicare.gov publication “2026 Medicare Costs”; the income thresholds and the married-filing-separately collapse are documented in the Social Security Program Operations Manual System, HI 01101.020. The tax treatment of a death benefit is described in IRS Publication 525.

• Medicare.gov: 2026 Medicare Costs
• CMS: 2026 Medicare Parts A and B premiums and deductibles
• SSA POMS HI 01101.020: IRMAA thresholds and amounts
• IRS Publication 525: taxable and nontaxable income
• Medicare.gov: costs at a glance

Cover the surcharge years with tax-free dollars

A Medicare surcharge is a fixed annual bill that arrives whether or not the income that caused it still exists. Coverage sized to that bill pays it without raising MAGI, without a Roth conversion, and without touching the survivor’s tax bracket. Run the calculator above for your own MAGI, then compare free life insurance quotes for the face amount it recommends — and if you are still deciding how much coverage your household needs overall, start with the retiree life insurance guide.