Topic guide · updated 2026-08-02
What Medicare Actually Costs in a Year
The Part B premium, the deductibles, the income surcharge that arrives two years after the income, and the drug or supplement premium on top. Every piece is published in a different document, so here they are in one place, each cited to the notice that set it.
Ask what Medicare costs and you will be told a premium. That figure is real, and it is roughly a third of the answer. The rest is a deductible in one document, an income-related surcharge in a second, a drug plan priced by an insurer, and a supplement priced by another one — and nobody, including Medicare, publishes the sum.
This cluster puts the pieces in the order they actually hit a household budget. Start with the base premium that everyone pays, add the surcharge if your income two years ago crossed a threshold, then add what you pay for drug coverage and any supplement. Every fixed figure here comes from a CMS notice we have read, with the date we read it printed beside it.
One piece of this deserves its own warning, and it is the surcharge. Almost everybody assumes it works like an income tax bracket, where only the amount above the line is charged at the higher rate. It does not. It is a cliff, and being one dollar over it costs the whole step for a full year.
The premium everyone starts from
The standard Part B premium is set by CMS each autumn, in an annual notice that also sets the deductible. Most people pay exactly that amount, and for anyone drawing Social Security it is deducted from the monthly payment before it reaches the bank. Everyone else is billed directly, usually every three months. The premium moves each year, and it does not move in step with the Social Security cost-of-living increase, because the two are set by different bodies on different timetables using different measures. That is ordinary rather than an error, and the eleven-year history on the Part B page is the honest way to see which years were unusual.
The surcharge that arrives two years late
IRMAA is an extra monthly amount added to Part B and Part D when income was above a threshold — and the income it looks at is the adjusted gross income plus tax-exempt interest on the tax return you filed two years ago. That lag is why a surcharge so often lands with no obvious cause: the property sale, the Roth conversion, or the final year of full-time work that triggered it is long past. It is charged per person, so a married couple where both are enrolled pays it twice against one joint income. And it is a cliff rather than a slope, which is why the distance to the next threshold matters more than the surcharge itself.
When a surcharge can be reconsidered
Social Security will use a more recent year if one of eight life-changing events caused the drop in income: marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of income-producing property, loss of pension income, or an employer settlement payment. The route is Form SSA-44, the evidence required for each event is published on the form itself, and there is never a fee to file it — a fact worth holding on to, because paid help with this is advertised widely. Only Social Security can make the determination, and they check the income figure against IRS records afterward.
Adding it all up, honestly
A yearly total needs one thing we deliberately do not hold: what a supplement or a drug plan costs where you live. Those prices depend on your state, your age, the rating method the insurer uses and the insurer itself, and quoting one would put this site on the selling side of a line it does not cross. So the estimator asks you for those figures, labels every line you supplied as yours, and adds them to the published ones. It then lists what the total leaves out — dental, vision, hearing and long-term care, none of which Original Medicare covers.
Tools in this topic
Every calculator and explainer in this cluster, each built on verified figures with its official source linked.
IRMAA Calculator
IRMAA is the income-related surcharge added to your Medicare Part B and Part D premiums when the tax return you filed two years ago showed income above a threshold. Enter that income and your filing status to estimate your tier, the monthly and yearly surcharge, and exactly how many dollars sit between you and the next cliff.
Roth Conversion → IRMAA
A Roth conversion counts as income, and Medicare sets your premium from the return you filed two years earlier. So a conversion made this autumn surfaces as a surcharge two Januarys later. Enter your income and the amount you are weighing to see which thresholds it crosses and what each step costs.
Part B Premium
The standard Medicare Part B premium and annual deductible for 2026, taken straight from the CMS notice that set them, with every year back to 2016 so you can see how fast this line item has actually risen. Higher earners pay more through IRMAA; this page shows the base figure everyone starts from.
Total Cost Estimator
Nobody publishes one number for what a year of Medicare costs a household, because the pieces live in separate documents. This estimator adds them: the Part B premium, any IRMAA surcharge, deductibles, and the drug or supplement premium you supply. Original Medicare and Advantage are shown as two shapes of cost, without a verdict.
SSA-44 Walkthrough
Form SSA-44 is how you ask Social Security to base your Medicare surcharge on this year's income instead of the two-year-old tax return that triggered it. Here are the eight life-changing events that qualify, the evidence Social Security accepts for each one, and how the form is filed. Filing it is free.
Part D Costs
What Medicare drug coverage can cost you in a year, now that there is a hard ceiling on it. The cap, the most a plan may charge as a deductible, and the national figure that quietly sets the late-enrollment penalty, each taken from the CMS notice that published it. No plan is named or priced.
Guides
What MAGI Means for Medicare, Line by Line
Medicare's income surcharge is set by a figure called MAGI, and it is not the same MAGI used for Roth contributions or for the health-insurance marketplace. For IRMAA it is two lines from Form 1040 added together. Here is exactly which two, and what does not belong in the sum.
Why Your Part B Premium Changed This Year
A Part B premium can move for three entirely separate reasons, and they are routinely mistaken for one another. The standard premium changed, or your income two years ago crossed a threshold, or a rule tied your increase to your Social Security raise. Here is how to tell which one happened.
Key terms
Frequently asked questions
The income surcharge, for two reasons at once. It is based on a tax return filed two years earlier, so the income that caused it is long gone by the time the bill arrives, and it works as a cliff rather than a bracket, so one dollar over a threshold moves the whole surcharge up a tier for the year.
Official sources for this topic
Every figure and rule referenced above is published by one of these agencies, and each of them — not this site — determines what is actually paid.
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