2026 IRMAA Brackets: How Much Extra Will You Pay?

Q: What income triggers IRMAA in 2026?

Modified Adjusted Gross Income above $109,000 for a single filer, or $218,000 for a married couple filing jointly — based on your 2024 tax return, since IRMAA uses a two-year lookback.

Q: Is IRMAA a gradual increase, or does it jump all at once?

It's a cliff, not a gradual phase-in. Exceeding a threshold by even $1 triggers the full surcharge for that entire tier — there's no partial or prorated amount.

Q: Can I appeal an IRMAA surcharge?

Yes, if you've had a qualifying life-changing event — retirement, divorce, or the death of a spouse, among others — that reduced your income since the tax year IRMAA is based on. This is done through Social Security form SSA-44.

Published August 29, 2026 How we keep this accurate

What IRMAA actually is

IRMAA (Income-Related Monthly Adjustment Amount) is a surcharge added to standard Medicare Part B and Part D premiums once your Modified Adjusted Gross Income (MAGI) crosses a set threshold. It isn't a penalty for doing anything wrong — it's an automatic, income-based adjustment applied by Social Security once your tax data is on file.

The 2026 numbers that matter

	Figure
Standard Part B premium (below threshold)	$202.90/month
Where IRMAA starts (single filer)	MAGI above $109,000
Where IRMAA starts (married filing jointly)	MAGI above $218,000
Highest possible Part B premium	$689.90/month
Highest possible Part D surcharge	$91.00/month, on top of your plan's own premium
Top bracket threshold	$500,000 (single) / $750,000 (married)

Source: CMS 2026 Medicare Parts A & B Premiums and Deductibles announcement; figures effective 2026.

The number that actually determines your 2026 premium isn't from this year

IRMAA uses a two-year lookback. Your 2026 premium is based on your 2024 tax return, not your current income. If your income has since dropped — through retirement, for example — your premium may not reflect that until Social Security reviews next year's data, unless you file an appeal.

Why this catches people off guard: it's a cliff, not a slope

IRMAA doesn't work like an income tax bracket, where only the amount above a threshold gets taxed at a higher rate. Exceeding a threshold by even $1 triggers the full surcharge for that entire tier — there's no partial or gradual increase. A retiree who reports $109,001 in MAGI pays the same surcharge as someone who reports $137,000, simply because they're in the same tier.

This is especially relevant around Roth conversions and large capital gains. A single large financial event two years before you're on Medicare — selling appreciated stock, converting a large IRA balance — can push you into a materially higher premium tier for an entire year, even if your income returns to normal immediately after.

If your income has genuinely dropped since then

If you've had a qualifying life-changing event since the tax year your IRMAA is based on — retirement, reduced work hours, divorce, or the death of a spouse, among others — you can request a reduction using Social Security form SSA-44. This doesn't erase IRMAA entirely, but it can adjust your premium to reflect your actual current income rather than a stale two-year-old figure.

How to actually check your specific bracket

Find your 2024 MAGI on your tax return (Form 1040, adjusted gross income plus any tax-exempt interest).

Confirm the exact current bracket boundaries directly at Medicare.gov or in your annual IRMAA determination letter from Social Security — the boundaries between the standard rate and $689.90 involve several intermediate tiers this overview doesn't break out individually.

If your income has dropped since 2024 due to a qualifying event, file SSA-44 rather than simply accepting the higher premium.

Common Questions

What income triggers IRMAA in 2026?

MAGI above $109,000 single or $218,000 married filing jointly, based on your 2024 tax return.

Is IRMAA a gradual increase, or does it jump all at once?

It's a cliff — exceeding a threshold by even $1 triggers the full surcharge for that tier.

Can I appeal an IRMAA surcharge?

Yes, using SSA-44, if you've had a qualifying life-changing event that reduced your income since the lookback year.