Social Security COLA vs Medicare Part B Increase: Millions of retirees are about to get a raise, and just as quickly, a chunk of it is about to get eaten. New inflation data released this month points to a 2027 Social Security cost of living adjustment in the mid 3 percent range, the largest annual raise beneficiaries have seen in three years. At the same time, the 2026 Medicare Trustees Report projects that the standard Medicare Part B premium will climb from 202.90 dollars a month to roughly 209.50 dollars a month in 2027. Because Part B premiums are pulled directly out of most people’s Social Security deposits before the money ever reaches their bank account, the number printed on your official COLA notice this December will not be the number that actually lands in your pocket every month. We will be updating this article monthly as new inflation readings and official CMS numbers come in.
The gap between those two figures, the Social Security COLA vs Medicare Part B increase, is the single most important number for anyone living on a fixed income right now. The Senior Citizens League currently estimates the 2027 COLA at 3.5 percent, while AARP puts it slightly higher at 3.6 percent, both based on Consumer Price Index for Urban Wage Earners and Clerical Workers data collected through August. The Social Security Administration will not confirm the final figure until mid October, after the September inflation report is released. Meanwhile, the Part B premium jump, while smaller in percentage terms than last year’s steep 9.7 percent hike, is still expected to be the second consecutive year that Medicare costs rise faster than general inflation. Below, we break down exactly how much of your raise survives once Medicare takes its cut, with a free calculator you can use with your own benefit amount.
Social Security COLA vs Medicare Part B Increase Key Highlights
| Item | 2026 (Confirmed) | 2027 (Projected/Estimated) |
|---|---|---|
| Social Security COLA | 2.8 percent | 3.5 to 3.6 percent (estimate, not final) |
| Average retired worker benefit | 2,071 dollars a month | Approximately 2,143 to 2,146 dollars a month after COLA |
| Standard Medicare Part B premium | 202.90 dollars a month | Approximately 209.50 dollars a month (Trustees Report projection) |
| Part B premium increase | 17.90 dollars (9.7 percent) | Approximately 6.60 dollars (about 3.25 to 3.3 percent) |
| Part B annual deductible | 283 dollars | Approximately 292 to 310 dollars (early estimate) |
| Official COLA announcement date | Already released | Expected around October 14 to 15, 2026 |
| Official Medicare premium announcement | Already released | Expected in November 2026 |
| Effective date of new amounts | January 2026 | January 2027 |
These are the most current, publicly available figures as of this month. The COLA percentage is still an estimate from independent analysts, not an SSA-confirmed number, and the Part B premium is a Trustees Report projection, not a CMS-confirmed rate. Both will be finalized in the coming weeks, and this page will be updated the moment official numbers are released.
Calculate Your 2027 Net Social Security Benefit
Use the calculator below to see how much of your projected COLA raise actually survives after the estimated Medicare Part B premium increase is subtracted. Enter your current monthly Social Security benefit, adjust the COLA percentage and premium increase if you want to test different scenarios, and the calculator will show your estimated net monthly gain.
Net Benefit Calculator
For an average retiree collecting 2,071 dollars a month, a 3.5 percent COLA adds about 72.49 dollars in gross monthly income. Subtract the projected 6.60 dollar Part B premium increase, and the net gain drops to roughly 65.89 dollars a month, or about a 3.18 percent effective raise rather than the headline 3.5 percent figure. That difference of 6.60 dollars a month works out to nearly 80 dollars over the full year, money that never reaches a beneficiary’s bank account because it is withheld automatically for Medicare.
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What the COLA Estimate Actually Means for Your Check?
The Social Security COLA is calculated by comparing the average Consumer Price Index for Urban Wage Earners and Clerical Workers across the third quarter, July, August, and September, of the current year to the same period the year before. Two of the three months needed for 2027 have already been reported. August’s CPI-W came in at a 3.5 percent annual increase, driven largely by gasoline prices that jumped 3.9 percent for the month and now sit more than 27 percent above year ago levels. That energy price pressure is the biggest remaining wild card. If diesel and gasoline costs keep climbing through September, forecasters expect the final COLA to land closer to 3.6 percent. If prices cool, it could settle nearer 3.5 percent or even slightly lower.
The Senior Citizens League, an independent nonpartisan advocacy group that has tracked COLA trends for decades, currently projects 3.5 percent, translating to roughly 67.90 dollars in extra monthly income for the average retired worker before any Medicare deduction. AARP’s separate analysis, built on the same underlying CPI-W data plus Federal Reserve Bank of Cleveland inflation projections for September, currently forecasts 3.6 percent. Either way, this would be the highest annual Social Security raise since 2023, a sharp jump from the 2.8 percent increase that took effect in January 2026 and the 2.5 percent adjustment the year before that.
The Social Security Administration will not confirm the official number until the Bureau of Labor Statistics releases September’s CPI-W report, expected around October 14, 2026, with the formal COLA announcement following within a day or two. Roughly 75 million Social Security and Supplemental Security Income beneficiaries will see the adjustment reflected in checks starting with the January 2027 payment, and SSI recipients typically see their increase a few days earlier, at the end of December 2026.
Why Medicare Part B Premiums Are Rising Again in 2027?
Medicare Part B, which covers outpatient care, doctor visits, and durable medical equipment, is funded partly through general tax revenue and partly through the monthly premiums beneficiaries pay. Those premiums are recalculated every year based on projected program spending, and the 2026 Medicare Trustees Report, the government’s official annual actuarial estimate, projects the standard premium will rise from 202.90 dollars a month in 2026 to approximately 209.50 dollars in 2027, an increase of about 6.60 dollars or 3.25 percent.
That would actually be welcome news for beneficiaries after the sharp 9.7 percent jump they absorbed between 2025 and 2026, when the standard premium rose 17.90 dollars in a single year. Trustees point to higher healthcare utilization, rising medical costs, and a growing enrollee population as the main drivers behind the continued climb, though the pace of the projected 2027 increase is the smallest since a decrease in 2023.
It is worth noting that Trustees Report estimates are not final numbers. The Centers for Medicare and Medicaid Services will not officially confirm 2027 premiums, deductibles, and income related surcharge brackets until around November 2026, roughly a month after the Social Security Administration finalizes the COLA. Last year’s Trustees Report, published in 2025, had projected a much higher 2027 premium of 218.60 dollars, a figure this year’s report revised down by more than 9 dollars based on lower than expected spending through the first half of 2026. Some private analysts remain skeptical of the lower estimate, pointing to a recent pattern of Trustees Reports undershooting the eventual CMS confirmed number, and suggest the real 2027 premium could land somewhere between 215 and 219 dollars instead. The Part B annual deductible, confirmed at 283 dollars in 2026, is separately projected to rise to somewhere between 292 and 310 dollars in 2027.
Higher income beneficiaries should also watch the Income Related Monthly Adjustment Amount, or IRMAA, brackets. Your 2027 surcharge tier will be based on the modified adjusted gross income reported on your 2025 tax return, which has already been filed for most people. Early projections put the 2027 IRMAA threshold at roughly 112,000 dollars for single filers and about 224,000 dollars for joint filers, though these too remain estimates until CMS confirms them this fall.
How the Hold Harmless Provision Protects Your Benefit?
One important safeguard built into federal law is the hold harmless provision. It prevents a Medicare Part B premium increase from ever reducing the dollar amount of a beneficiary’s net Social Security check compared to the prior year, as long as that person had Part B premiums withheld directly from Social Security in both years. In practical terms, this means your gross COLA increase will always be at least as large as your Part B premium increase, so your check cannot shrink year over year purely because of rising Medicare costs.
The catch is that hold harmless only guarantees your check will not go down, not that your raise will feel meaningful. In a year with a modest COLA and a steep Part B hike, like the 2026 cycle when the premium jumped 17.90 dollars, some lower benefit retirees saw almost their entire raise absorbed by Medicare. The hold harmless rule also does not apply to everyone. New Medicare enrollees, people who have their premium billed directly rather than withheld from Social Security, and higher income beneficiaries paying IRMAA surcharges are not automatically covered by the same protection in every circumstance. Federal retirees who receive a CSRS or FERS annuity separately from Social Security should also note that Part B premiums are not deducted from that annuity directly, so the offset applies only to the Social Security portion of their income unless they specifically enrolled through OPM premium conversion.
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COLA vs Medicare Part B: The Real Math Behind Your Raise
Here is how the numbers play out across a few common benefit levels, using the current 3.5 percent COLA estimate and the 6.60 dollar Part B increase projected in the Trustees Report. These are illustrative examples using current estimates, not final confirmed figures.
| Current Monthly Benefit | Gross COLA Increase (3.5%) | Part B Premium Increase | Net Monthly Increase | Effective Net Raise |
|---|---|---|---|---|
| 1,200 dollars | 42.00 dollars | 6.60 dollars | 35.40 dollars | 2.95 percent |
| 1,700 dollars | 59.50 dollars | 6.60 dollars | 52.90 dollars | 3.11 percent |
| 2,071 dollars (average) | 72.49 dollars | 6.60 dollars | 65.89 dollars | 3.18 percent |
| 2,500 dollars | 87.50 dollars | 6.60 dollars | 80.90 dollars | 3.24 percent |
| 3,200 dollars | 112.00 dollars | 6.60 dollars | 105.40 dollars | 3.29 percent |
Because the Part B increase is a flat dollar amount rather than a percentage, it takes a proportionally bigger bite out of smaller benefit checks. A retiree collecting 1,200 dollars a month loses nearly 16 percent of their gross COLA raise to the Medicare premium hike, while someone collecting 3,200 dollars a month loses less than 6 percent of their raise to the same dollar increase. This is one reason advocacy groups have repeatedly flagged the combination of a modest COLA and a large flat rate Part B hike as disproportionately hard on lower income retirees, even in years when the headline COLA percentage looks generous.
When Will You See the 2027 Increase?
The Social Security Administration typically mails COLA notices in early December, and starting a few years ago also began posting them directly in each beneficiary’s online My Social Security account, usually before the mailed letter arrives. The notice shows your new gross benefit amount, your Medicare Part B premium deduction if applicable, and your final net payment amount. The increased payment itself begins with the December 2026 payment for SSI recipients, paid at the end of that month, and with the January 2027 payment for retirement, survivor, and disability beneficiaries, which generally arrives based on your birth date on the second, third, or fourth Wednesday of the month.
CMS confirms official Part A and Part B premiums, deductibles, and IRMAA brackets in a separate announcement, typically in November, a few weeks before the Medicare Annual Election Period closes on December 7. That means most beneficiaries will know their exact 2027 Part B premium before they know their exact final COLA impacted paycheck, since the COLA itself is confirmed in October but the premium is confirmed roughly a month later.
How to Check Your Official 2027 COLA and Medicare Notice?
- Log in to your account at ssa.gov using your personal My Social Security credentials to view your COLA notice as soon as it posts, typically before the mailed version arrives.
- If you do not yet have an account, you can create one directly on the Social Security Administration’s website using your Social Security number and a valid form of identification.
- Review the Medicare Part B premium section of your notice carefully, since this is where your net payment amount, after the premium deduction, will actually be listed.
- Beneficiaries paying an IRMAA surcharge can find their income tier and appeal instructions through their Medicare.gov account or by contacting the Social Security Administration directly if their 2025 income was affected by a life changing event such as retirement or divorce.
- If you believe your notice contains an error, you can request a correction or an appeal through your local Social Security office, by phone, or in writing, generally within 60 days of the notice date.
Official Sources and Useful Links
| Resource | Purpose | Official Link |
|---|---|---|
| Social Security Administration | Official COLA announcements and news | ssa.gov |
| My Social Security | Login to view your personal COLA notice | ssa.gov/myaccount |
| Create a My Social Security Account | New account registration | ssa.gov/myaccount/create.html |
| Social Security Benefit Status | Check payment and application status | ssa.gov/myaccount |
| Medicare.gov | Official 2027 Part B premium and deductible updates | medicare.gov |
| Medicare Costs | Current and historical Part B premium tables | medicare.gov/basics/costs |
| CMS.gov | Trustees Report and official Medicare announcements | cms.gov |
| Social Security COLA Fact Sheet | Historical COLA data and methodology | ssa.gov/cola |
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FAQs
What is the 2027 Social Security COLA estimate right now?
Independent analysts currently estimate the 2027 COLA between 3.5 and 3.6 percent, based on CPI-W data through August 2026. The Social Security Administration will confirm the official figure in mid October 2026 after September inflation data is released.
How much will the Medicare Part B premium increase in 2027?
The 2026 Medicare Trustees Report projects the standard Part B premium will rise from 202.90 dollars to approximately 209.50 dollars a month in 2027, an increase of about 6.60 dollars. This is a projection and CMS will not confirm the official figure until around November 2026.
Will my Social Security check actually go down because of the Medicare increase?
No. The hold harmless provision legally prevents your net Social Security check from decreasing year over year solely because of a Part B premium increase, as long as you had Part B withheld from your Social Security in both years. Your raise can be smaller than the headline COLA, but your check cannot shrink below last year’s amount for this reason alone.
How do I calculate my actual net raise for 2027?
Multiply your current monthly benefit by the COLA percentage to get your gross dollar increase, then subtract the estimated Part B premium increase of about 6.60 dollars if you have Medicare premiums withheld from your check. You can use the calculator above to run this automatically with your own numbers.
When will I know my exact 2027 Social Security payment amount?
The Social Security Administration typically posts COLA notices to My Social Security accounts and mails paper notices in early December 2026, showing your exact new gross and net benefit amounts once both the COLA and the Part B premium are officially finalized.
Why does a smaller benefit lose more of its raise to Medicare?
Because the Part B premium increase is a flat dollar amount, not a percentage, it represents a larger share of a smaller COLA dollar increase. A retiree with a lower benefit sees a bigger percentage of their raise absorbed by the same flat premium hike than someone with a higher benefit.
Does the hold harmless provision cover everyone on Medicare?
Not automatically. New Medicare enrollees, people billed directly for Part B rather than through Social Security withholding, and some higher income beneficiaries paying IRMAA surcharges may not receive the same automatic protection as long term beneficiaries with premiums already withheld from their check.
What is IRMAA and how does it affect my 2027 premium?
IRMAA, or the Income Related Monthly Adjustment Amount, is a surcharge added to the standard Part B premium for higher income beneficiaries. Your 2027 IRMAA bracket will be based on the modified adjusted gross income reported on your 2025 tax return, with early projections putting the threshold near 112,000 dollars for single filers and 224,000 dollars for joint filers.
Is the 3.5 percent COLA estimate final?
No. It is a current projection from independent groups such as the Senior Citizens League and AARP based on CPI-W data through August 2026. The Social Security Administration will not confirm the final percentage until the September CPI-W report is released around October 14, 2026.
Does Medicare Part B come out of Social Security automatically?
Yes, for most beneficiaries who receive both benefits, the Part B premium is deducted directly from the monthly Social Security payment before it is deposited, so the amount that actually reaches a bank account is the net figure after this deduction.
What was the Medicare Part B premium increase in 2026?
The standard Part B premium rose from 185 dollars to 202.90 dollars in 2026, an increase of 17.90 dollars, or about 9.7 percent, one of the steepest single year jumps in recent memory.
How much was the average Social Security check in 2026?
The average retired worker received approximately 2,071 dollars a month in Social Security benefits as of January 2026, according to the Social Security Administration.
When does the Social Security Administration announce the yearly COLA?
The COLA is announced every October, after the Bureau of Labor Statistics releases the September Consumer Price Index for Urban Wage Earners and Clerical Workers, with the new amount taking effect the following January.
Why is the 2027 Medicare Part B increase smaller than 2026?
The 2026 Medicare Trustees Report currently projects a smaller 2027 increase, about 3.25 percent, compared to the nearly 10 percent jump in 2026, citing lower than expected program spending through the first half of 2026, though the figure remains an estimate until CMS confirms it in November.
Conclusion
The headline number on your 2027 Social Security COLA notice will not be the number that actually changes your monthly budget. Between an estimated 3.5 to 3.6 percent raise and a projected 6.60 dollar increase in the Medicare Part B premium, most beneficiaries with Medicare withheld from their check should expect a net increase somewhere between 3 and 3.3 percent once both figures are finalized this fall. Neither number is official yet. The Social Security Administration will confirm the COLA in mid October 2026, and the Centers for Medicare and Medicaid Services will confirm the Part B premium in November 2026. Until then, the calculator above, built on the most current Trustees Report and CPI-W data available, offers the most accurate estimate of what your real, take home raise will look like in January 2027. Check back here for updates as each official number is released.
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