Medicare Part B Premium 2027: Projected $209.50 a Month and What It Means for Your Social Security Check

The Medicare Part B premium 2027 is projected at $209.50 a month, according to the 2026 Medicare Trustees Report released on June 24. That is $6.60 more than the confirmed 2026 premium of $202.90, an increase of about 3.25%, and it would be the smallest percentage rise since 2023. The Part B deductible is projected to climb from $283 to about $292. The official numbers have not been announced. The Centers for Medicare and Medicaid Services normally publishes the premium, deductible and income brackets in November, ahead of the December 7 end of Medicare open enrollment.

The projection arrives alongside a 2027 Social Security cost-of-living adjustment that forecasters put at 3.5% to 3.6%, which would add roughly $73 to $75 a month to the average retired worker’s check. Most beneficiaries pay the Part B premium straight out of that check, so the net gain depends on both numbers. At $209.50, the typical retiree would keep about $66 to $68 of the raise, and a higher final premium would shrink it. This guide explains the projection, the premium history, how the hold harmless rule works, who pays more and a calculator that shows your net deposit. We’ll be updating this article monthly.

Medicare Part B Premium 2027 Key Highlights

How the Medicare Part B Premium 2027 Projection Was Set?

The number comes from the Medicare Trustees, who estimate Part B costs and set the premium so that enrollees cover about a quarter of the program’s spending. The 2026 report released on June 24 says the monthly premium in 2026 is $202.90 and the estimated premium for 2027 is $209.50.

The estimate has moved. The Trustees’ report a year earlier projected a 2027 premium of $218.60, so the latest projection is more than $9 lower. A report written in the middle of the year is a forecast of spending, and the final figure can land above or below it depending on how health costs, drug spending and enrollment come in. Private analysts expect something between $215 and $219, a range that reflects a more cautious view of cost growth.

The official figure is a decision made by CMS. Until it arrives, the sensible approach is to plan with $209.50 as the base case and test a higher number.

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Medicare Part B Premium 2027: Projected at $209.50 a Month, and What It Means for Your Social Security Check

Part B Premium History: How 2027 Compares

The 2026 jump was the largest in years, and it ate into last year’s 2.8% COLA. The 2027 projection is gentler. If the COLA is 3.5% and the premium rises 3.25%, benefits would grow faster than the premium for the first time since 2023.

Will Medicare Part B Take Your 2027 Social Security Raise?

It will take some of it. Here is how it plays out at three benefit levels, using a 3.5% COLA.

The premium is the same flat dollar amount for everyone with the standard rate, so it takes a bigger share of a smaller raise. A retiree at $1,200 loses about 16% of the raise to a $6.60 increase, while someone at $3,000 loses about 6%.

For perspective, the standard premium of $209.50 would take about 10% of the average retired worker’s gross check of $2,086. For a retiree at $1,200, it would take about 17%.

Part B Hold Harmless Rule: Who Is Protected in 2027?

The hold harmless provision stops a Social Security check from shrinking in dollars because of a Part B increase. It applies when your premium is deducted from your Social Security payment and your COLA is smaller than the premium increase. In that case, your premium increase is limited so your net deposit does not fall.

It matters less in 2027 than it did in some past years. With a premium increase of about $6.60, a COLA of 3.5% exceeds the increase for anyone whose gross benefit is above about $189 a month. People with benefits below that level are rare, so very few beneficiaries would hit the rule at the projected premium. If the premium comes in higher, the threshold rises. At $16 higher, for example, it would be about $460.

The rule does not apply to everyone. It does not protect people who pay an income-related surcharge, people who are new to Part B in 2027 and people who pay their premium directly instead of through a deduction. Also note that the protection only prevents a net decrease. It does not guarantee that you keep the whole raise.

Part B Deductible and Other Costs for 2027

The premium is not the only cost. After you pay the annual deductible, Part B generally pays 80% of approved amounts for outpatient care and you pay 20% with no annual cap in original Medicare. The 2026 deductible is $283, and the Trustees project about $292 for 2027, which is $9 higher.

Put the pieces together and the projected annual Part B cost before any coinsurance is $209.50 times 12 plus $292, or about $2,806. Many retirees reduce the risk of the 20% coinsurance with a Medigap policy, an employer or retiree plan or a Medicare Advantage plan, each of which has its own premium and rules.

One summary of 2027 projections also lists the Part D out-of-pocket cap rising to $2,400, up from $2,100 in 2026, which is an additional cost trend for people on prescription drug plans. Treat that figure as a projection and check it on Medicare.gov.

IRMAA: When the Part B Premium Is Higher Than Standard

The income-related monthly adjustment amount adds a surcharge for higher earners. Medicare uses the modified adjusted gross income from your tax return two years earlier, so your 2025 return sets your 2027 premium. Projected thresholds put the first surcharge tier at about $112,000 for single filers and $224,000 for joint filers. Above that, the surcharge rises in several steps, and the highest tier can more than triple the total premium.

IRMAA is based on a snapshot, and life changes. If your income dropped because of retirement, the death of a spouse, divorce or another qualifying event, you can ask the Social Security Administration for a new decision using the form it provides. One review found that a single sale of an asset can push income over a threshold, so look at your 2025 return before you are surprised in January.

Who Does Not Have Part B Taken From Social Security?

Not everyone pays through a deduction. People who have not yet claimed Social Security, who are newly enrolled or who are not eligible for monthly benefits are billed directly, often quarterly or through Medicare Easy Pay. They are also not covered by the hold harmless rule in the first year.

State Medicare Savings Programs pay the Part B premium for people with limited income and resources. If you are in one, your state, not you, pays the premium, and you will not see a deduction. These programs are run through your state Medicaid office, and eligibility depends on income and assets.

This also matters for the new $90 Medicare payment announced October 2, which reports say excludes people whose premiums are paid by Medicaid and people who pay the income surcharge. At the projected premium, $90 would cover about 43% of one month of Part B.

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How Part B Compares With Your 2027 COLA Notice?

SSA sends a notice each December that shows your new gross benefit, the Part B premium taken out and your net deposit. The notice reflects the final premium announced in November. It is the document to trust, because it includes your own surcharge, if any. Compare it with the estimate from the calculator to catch mistakes early, and call SSA if the numbers do not match.

Medicare Part B Premium 2027 Calculator

The calculator attached to this article shows what lands in your bank account. Enter your current gross benefit, choose a COLA scenario from 3.4% to 3.7% and set the 2026 premium, which is filled in at $202.90. Pick a 2027 premium from the Trustees’ $209.50, a private estimate of $215 or $219, or enter your own. Say whether your premium is taken from Social Security with no surcharge.

The tool shows your new gross benefit, the COLA raise, the Part B increase, your net deposit in 2026 and 2027, the net raise and what share of your gross check goes to Part B. If the hold harmless rule would apply, it limits the premium increase and tells you so. For example, a retiree with a $2,085.98 benefit, a 3.5% COLA and a $209.50 premium would see a net deposit rise of about $66 a month and pay about $2,514 a year for Part B premiums. Use it again after CMS publishes the official premium.

How to Enroll in Medicare Part B?

Part B is optional, but missing your enrollment window can raise your premium for life. Here is how it works.

1. Check your eligibility at age 65. If you already receive Social Security, you are usually enrolled automatically in Parts A and B.
2. If you are not enrolled, apply for Medicare online through the Social Security Administration. Your initial enrollment period runs for seven months around your 65th birthday.
3. If you or your spouse is still working and has employer coverage, you may delay Part B without a penalty. Confirm with your employer.
4. If you miss your window and do not qualify for a special enrollment period, you may pay a late enrollment penalty of 10% of the standard premium for each full 12-month period you could have had Part B but did not.
5. Decide on supplemental coverage, such as a Medigap policy or a Medicare Advantage plan, during your enrollment window.

Processing Time: How Long Until Part B Starts and When You Learn the Final Premium

A Part B application through SSA is often processed in a matter of weeks, depending on whether documents are needed. Coverage starts on the date shown in your confirmation. For the 2027 premium, the timeline looks like this: CMS typically announces the figure in November, SSA posts notices in your online account in early December, and the new premium comes out of your benefit beginning in January. If your premium is billed directly, the notice arrives before your first payment is due.

Payment Schedule

Medicare Open Enrollment: Why October 15 to December 7 Matters

Medicare’s annual open enrollment lets you change Medicare Advantage and Part D plans, and it is the right time to review your coverage when premiums rise. A Medigap policy follows different rules, so check whether you can switch without medical underwriting. Because the Part B premium is the same for everyone with the standard rate, savings often come from plan choices, not Part B itself. A plan with a lower premium or a smaller out-of-pocket maximum can save far more than a few dollars of Part B.

Part B and Taxes: What to Ask a Professional

Medicare premiums may be deductible as medical expenses if you itemize and your total medical costs pass the threshold, and some self-employed people have different options. Because your Social Security benefit may also be taxable, the net effect of Part B depends on your total income. Speak to a tax professional before you rely on a deduction.

Beware of Medicare Premium Scams

Scammers like open enrollment season. Medicare will not call you to demand payment, will not ask for gift cards and will not threaten to cancel your coverage if you do not provide a Social Security number over the phone. Hang up on callers who claim to be from Medicare and call 1-800-MEDICARE yourself. Use only official government websites, and report fraud to the FTC and the Medicare fraud hotline.

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Official Websites and Resources

FAQs About Medicare Part B Premium 2027

Conclusion

The Medicare Part B premium 2027 is projected at $209.50 a month, up $6.60 from $202.90, with a deductible near $292. It would be the mildest increase in years and the first in a while to trail the COLA, but it will still take a slice of every raise, especially for people with smaller checks. The official number arrives in November, so plan with $209.50, test $219, check your own premium in your December notice and use open enrollment to look for savings. Try the calculator to see your net deposit and remember that the hold harmless rule and the Medicare Savings Programs can help some beneficiaries. We will update this guide as soon as CMS publishes the official premium.

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