2027 Part B Premium Affects Your Social Security COLA: Every October, millions of retired and disabled Americans wait for one number: the Social Security cost-of-living adjustment, or COLA. This year the news was good on paper. On October 14, 2026, the Social Security Administration announced a 3.6 percent COLA for 2027. It is the largest raise in four years and the biggest since 2023. For the average retired worker, it adds about $75 a month starting in January.
But that headline number is not what ends up in your bank account. For about 65 million people on Medicare, the Part B premium, the monthly fee for doctor visits, outpatient care and preventive services, is usually deducted straight from the Social Security check before the money arrives. When the premium rises, part of the COLA is absorbed by Medicare before you see it. In 2026 the standard Part B premium jumped 9.7 percent, to $202.90 from $185.00, far faster than the 2.8 percent COLA that year. Many retirees felt that gap in their January deposit.
Social Security COLA
The 2027 Social Security COLA picture looks gentler, but it is not final. The 2026 Medicare Trustees Report projects a standard premium of about $209.50 for 2027, which is $6.60 more than in 2026. CMS typically confirms the real figure in mid-November. The final number, the income-based surcharge (IRMAA), and a little-known protection called the “hold-harmless” rule decide how much of your raise you actually keep. This guide walks through the verified numbers, shows worked examples, lists the dates to watch, and tells you where to check the official figures yourself.
The 2027 Social Security COLA: What Is Confirmed?
Social Security and SSI payments for 76 million Americans will rise 3.6 percent in 2027, and the average retirement benefit goes up by about $75 a month starting in January. The COLA is based on the CPI-W inflation index. SSA measures it from the third quarter of 2025 through the third quarter of 2026.
SSA’s own fact sheet gives these average monthly benefits for January 2027:
| Beneficiary group | Before COLA | After 3.6% COLA | Increase |
| All retired workers | $2,095 | $2,170 | $75 |
| Aged couple, both receiving benefits | $3,238 | $3,355 | $117 |
| Aged widow(er) alone | $1,936 | $2,005 | $69 |
| All disabled workers | $1,642 | $1,701 | $59 |
Other confirmed 2027 figures: the maximum taxable earnings rise to $192,300 from $184,500, and the maximum benefit for a worker retiring at full retirement age is $4,188 a month. The retirement earnings test exempt amount for people under full retirement age is $25,560 a year.
The Part B Premium: Confirmed vs. Projected
| Item | 2026 (official) | 2027 | Status |
| Standard monthly Part B premium | $202.90 | about $209.50 | Projected (Trustees Report) |
| Annual Part B deductible | $283 | about $292 | Projected |
| Coinsurance after deductible | 20% | 20% | Unchanged |
CMS set the 2026 standard premium at $202.90, and the deductible at $283. For 2027, the Trustees Report published June 9, 2026 projects $209.50 a month, a $6.60 or 3.25 percent increase. CMS had not released the official 2027 premium, deductible or IRMAA brackets, and the figures are expected in mid-November.
Treat $209.50 as a planning number, not a promise. Projections can miss in both directions. The 2025 Trustees Report had projected $218.60 for 2027, and the 2026 report revised it down to $209.50. Some private forecasters expect something between $215 and $219, but those are unofficial opinions, not CMS figures.
How Much of Your COLA Does Part B Take?
The following examples assume the projected $209.50 premium. They use SSA’s rounded average figures, and the premium is assumed to be deducted from the benefit.
| Beneficiary | COLA increase | Part B increase | Net gain per month | Share of COLA absorbed |
| Average retired worker | $75 | $6.60 | $68.40 | about 9% |
| Aged widow(er) | $69 | $6.60 | $62.40 | about 10% |
| Disabled worker | $59 | $6.60 | $52.40 | about 11% |
| Couple, both on Part B | $117 | $13.20 | $103.80 | about 11% |
| Benefit of $800/month | $28.80 | $6.60 | $22.20 | about 23% |
The pattern is clear: the lower your benefit, the bigger the bite. The premium is a flat dollar amount, while the COLA is a percentage of your check.
Take-home example (average retiree): In 2026 a $2,095 benefit minus the $202.90 premium leaves $1,892.10. In 2027, $2,170 minus $209.50 leaves $1,960.50 (before any Part D, Medigap or tax withholding).
What if the premium comes in higher? If the final premium were $216, the increase would be $13.10, about 17 percent of the average $75 raise. At $219 it would be $16.10, about 21 percent. These are scenarios, not forecasts.
The Hold-Harmless Rule
There is one safety net. Under the hold-harmless provision, if a beneficiary has the Part B premium deducted from Social Security, the premium increase is reduced where needed so the person’s net monthly payment does not fall. In other words, the COLA dollars can never be smaller than the premium increase for these people.
Key points from the CMS notice:
- It applies if you were entitled to Social Security benefits in November and December and your premiums are deducted from the benefit.
- It does not apply to anyone who pays an income-related monthly adjustment amount (IRMAA).
- It only matters when the dollar COLA is smaller than the dollar premium increase. At a $6.60 increase, that is roughly a benefit below about $183 a month.
- People who pay the premium directly, rather than through Social Security, and people newly enrolling in Part B are generally not covered by the rule. Check the CMS notice or SSA if this is you.
High Earners: IRMAA Adds to the Bill
Higher-income enrollees pay more than the standard premium. Medicare uses the income from your tax return from two years earlier. So 2027 surcharges are based on your 2025 return. The official 2026 table (individual / joint income) is:
| Individual MAGI | Joint MAGI | 2026 monthly Part B total |
| $109,000 or less | $218,000 or less | $202.90 |
| $109,000 to $137,000 | $218,000 to $274,000 | $284.10 |
| $137,000 to $171,000 | $274,000 to $342,000 | $405.80 |
| $171,000 to $205,000 | $342,000 to $410,000 | $527.50 |
| $205,000 to under $500,000 | $410,000 to under $750,000 | $649.20 |
| $500,000 or more | $750,000 or more | $689.90 |
The 2027 IRMAA brackets are not official yet. If your income dropped because of retirement, a job loss or another life-changing event, you can ask SSA to lower your IRMAA using its dedicated form page.
Key Dates
| Date | What happens |
| June 9, 2026 | Medicare Trustees Report published, projecting $209.50 for 2027 |
| October 14, 2026 | SSA announces the 3.6% COLA |
| October 15 to December 7, 2026 | Medicare open enrollment |
| November 18, 2026 | Deadline to sign up for digital notices to see your COLA online earlier |
| Mid-November 2026 (expected) | CMS announces the official 2027 Part B premium, deductible and IRMAA brackets |
| Late November 2026 | COLA notices begin appearing in the my Social Security Message Center |
| December 2026 | Mailed COLA notices for people without an online account |
| December 31, 2026 | Increased SSI payments begin |
| January 1, 2027 | New Part B premium and deductible take effect |
| January 2027 | Higher benefits paid on the regular schedule |
On payment timing, people born between the 1st and 10th are paid on January 13, 2027, and those born between the 11th and 20th on January 20, 2027. Under SSA’s standard Wednesday schedule, people born on the 21st to 31st would be paid on January 27. Some people paid on the 3rd will get their benefit on December 31, 2026, because January 3 falls on a Sunday.
Also note that people who create a my Social Security account can see their COLA up to three weeks earlier than by mail if they sign up for digital notices by November 18, 2026.
What You Can Do Now?
- Wait for the CMS announcement, then recalculate. Subtract the official premium increase from your dollar COLA. The formula is: new benefit, minus new Part B premium, minus any Part D or other deductions.
- Check your notice. Your SSA COLA notice will show your new gross benefit and the premium being withheld. Compare it with your December 2026 deposit.
- Use open enrollment (until December 7). Part B is fixed by law, but drug and Medicare Advantage plan costs are not. Switching plans may save more than the Part B increase costs. Note that CMS has already set the 2027 Part D out-of-pocket cap at $2,400 and the standard deductible at $700.
- Review IRMAA if your income changed. A lower-income event can reduce your surcharge.
- If money is tight, ask about help. Medicare Savings Programs and Part D Extra Help exist for people with limited income, and SSA links to both below.
Official Sources
| Source | What it covers? | Link |
| SSA: 2027 COLA announcement | The 3.6% COLA, payment timing, notices | CLICK HERE |
| SSA: 2027 COLA Fact Sheet | Average benefits, taxable maximum, earnings test | CLICK HERE |
| SSA: COLA information hub | All COLA pages | CLICK HERE |
| SSA Advocates: COLA notice, Oct 14, 2026 | Digital notice deadline (Nov 18, 2026) | CLICK HERE |
| CMS notice (Federal Register, Nov 19, 2025) | 2026 premium, deductible, IRMAA table, hold-harmless rules | CLICK HERE |
| CMS: 2026 Medicare Trustees Report | Source of the $209.50 projection | CLICK HERE |
| Medicare.gov | Official 2027 Medicare costs once published | CLICK HERE |
| SSA: Plan for Medicare | How Medicare premiums are deducted | CLICK HERE |
| SSA: Request to lower IRMAA | Appeal an income-related surcharge | CLICK HERE |
| SSA: Part D Extra Help | Help with drug plan costs | CLICK HERE |
| my Social Security sign-in | See your COLA notice online | CLICK HERE |
Frequently Asked Questions :-
1. What is the 2027 Social Security COLA?
3.6 percent, announced by SSA on October 14, 2026. It applies to Social Security and SSI.
2. What is the official 2027 Medicare Part B premium?
It has not been officially announced. The Trustees project about $209.50 a month, up from $202.90. CMS is expected to confirm the figure in mid-November 2026.
3. Will Part B take my entire COLA?
No. At the projected premium, the average retiree keeps about $68 of the $75 raise. Only people with very small benefits come close to losing most of it, and the hold-harmless rule protects them.
4. How is the Part B premium paid?
Most people have it deducted from their Social Security benefit. People who do not receive benefits are billed directly.
5. What is the hold-harmless rule?
A legal protection, under section 1839(f) of the Social Security Act, that prevents the Part B increase from reducing your net Social Security payment. It does not cover IRMAA payers.
6. Does the 2027 COLA apply to SSI?
Yes. The same 3.6 percent applies, and increased SSI payments begin December 31, 2026.
7. When will I see the new amount?
Online in the Message Center from late November, by mail in December, and in your bank account from January 2027 depending on your payment date.
8. Is the $209.50 figure guaranteed?
No. It is a projection. The final number could be higher or lower, and some private analysts expect a higher figure.
9. What will the 2027 Part B deductible be?
The 2026 deductible is $283. About $292 is projected for 2027, pending the official announcement.
10. Why does my Medicare premium differ from the standard amount?
Higher income triggers IRMAA, based on your tax return from two years earlier.
11. Can I do anything to lower my Part B cost?
Part B itself is set by law. You can request an IRMAA reduction after a qualifying life event, and low-income enrollees may qualify for a Medicare Savings Program through their state.
12. Does a higher Part B premium change my taxes?
Part B premiums may be deductible as a medical expense if you itemize, subject to IRS limits. Ask a tax professional about your situation.
