Free Web Tool · No Sign-up

Medicare Costs & IRMAA Calculator 2026

See your real 2026 Medicare cost — Part B, Part D, and the IRMAA income surcharge — and get warned before a few dollars of extra income costs you hundreds.

Your 2024 Income

2026 IRMAA is based on your 2024 tax return MAGI (adjusted gross income + tax-exempt interest).

2024 MAGI (income)

Filing status

Your Coverage

Part A premium (usually $0)

Part D plan premium

your plan's monthly premium (national average ~$25)

Your estimated Medicare cost

$322.76/mo

$3,873 per year · 2.9% of income

IRMAA applies · Tier 2 (1.4×)

The IRMAA cliff

You're $2,000 below Tier 3 (at $137,000 MAGI). Crossing it costs $1,235 more per year — a few thousand dollars of extra income can cost hundreds a month.

Cost breakdown

Part A premium$0.00

Part B premium (with IRMAA)$284.06

Part D plan premium$25.00

Part D IRMAA add-on$13.70

Total monthly$322.76

Estimate only. 2026 figures use your 2024 MAGI. Not affiliated with CMS or SSA — confirm your actual premium and IRMAA determination at Medicare.gov and SSA.gov.

How the Medicare & IRMAA Numbers Work

Your tier comes from income. Social Security sets your 2026 surcharge from the MAGI on your 2024 tax return. Enter that income and your filing status and the calculator finds your IRMAA tier — from no surcharge at all up to the highest bracket.

The cliff is the whole game. Tiers are all-or-nothing at the threshold. Cross a boundary by a single dollar and your entire Part B premium jumps to the next tier. The amber card shows how many dollars of headroom you have before the next step — and what crossing it would cost you per year.

Your true cost. The total adds Part A (usually $0), your IRMAA-adjusted Part B premium, your Part D plan premium, and the flat Part D IRMAA add-on — then shows it as a monthly figure, an annual figure, and a percentage of your income.

Key Terms at a Glance

IRMAA	The income-related surcharge added to Part B and Part D for higher earners.
MAGI	Adjusted gross income plus tax-exempt interest — the number IRMAA is based on.
2-year lookback	2026 premiums are set from your 2024 return, so this year's income can bite two years later.
The cliff	The sharp jump in cost when you cross a tier threshold by even one dollar.

Frequently Asked Questions

What is IRMAA?

IRMAA — the Income-Related Monthly Adjustment Amount — is an extra charge added to your Medicare Part B and Part D premiums if your income is above set thresholds. It is not a plan premium; it is a surcharge the government adds on top, and it can run from about $100 to over $600 a month for Part B alone.

How is my IRMAA tier decided?

By your modified adjusted gross income (MAGI) and your tax filing status. For 2026, Social Security looks at the MAGI from your 2024 tax return. Higher MAGI moves you into a higher tier, and each tier has a fixed Part B amount and a flat Part D add-on.

What is the "IRMAA cliff"?

IRMAA tiers are all-or-nothing at the threshold. Earning even one dollar over a bracket boundary can jump your whole premium to the next tier — so a few thousand dollars of extra income can cost well over a thousand dollars a year in Medicare. That sharp step is the cliff, and the calculator shows exactly how far below the next one you are.

What counts as MAGI?

MAGI is your adjusted gross income plus any tax-exempt interest (for example, municipal bond interest). Most people can read it straight off line 11 of their Form 1040 plus the tax-exempt interest on line 2a.

Can I lower or avoid IRMAA?

Often, yes — by managing the income in the lookback year: timing Roth conversions, harvesting losses, or making qualified charitable distributions (QCDs) from an IRA. If something changed recently — you retired, a spouse died, or you divorced — you can ask Social Security for a one-time reconsideration using current-year income.

Does everyone on Medicare pay IRMAA?

No. The large majority of beneficiaries pay the standard Part B premium with no surcharge. IRMAA only affects higher earners — roughly 7% of people on Medicare.

Available on Google Play

Plan around the cliff before it hits

The Medicare Calculator app adds an IRMAA income-timing planner (Roth conversions and QCDs), multi-year projections, and household modeling for two earners — all on your device.

Download on Google Play