What is the Part B premium and what affects it?

Costs
Last updated: 
April 10, 2026
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The short answer

The Part B premium is a monthly fee most Medicare enrollees pay for outpatient coverage. The standard amount changes each year, and higher earners pay more through a surcharge called IRMAA.

The full explanation

Part B covers things like doctor visits, lab work, and outpatient procedures. You pay a monthly premium to have it, and that amount is set by the federal government each year, so it shifts annually. Most people pay the standard rate, but your income from two years ago determines whether you pay more. If your income crosses certain thresholds, Medicare adds what's called IRMAA, an Income-Related Monthly Adjustment Amount, on top of the standard premium. It's not a penalty. It's just a higher tier based on what you earned. For example, if you had a high-income year due to selling a home or taking a large retirement distribution, you might temporarily land in a higher bracket. The good news is you can appeal an IRMAA determination if your income has since dropped due to a life-changing event like retirement. Part B also comes with a yearly deductible, and after that you typically pay 20 percent of covered services with no out-of-pocket cap unless you have supplemental coverage.

Related Medicare Resources

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In 

 specifically

If your income is limited, Utah's Medicare Savings Program may help cover your Part B premium. The Aging and Disability Resource Center (ADRC), which runs Utah's free SHIP counseling program, can help you apply.

What this means for you

For you, this means your monthly Part B cost depends on both the current year's standard rate and your income from two years prior, so a one-time financial event could temporarily raise what you owe.

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