The official 2027 Social Security cost-of-living adjustment will be announced on October 14, 2026, and takes effect with January 2027 payments. As of late August, independent projections sit in the mid three percent range — AARP has estimated around 3.5 percent and The Senior Citizens League around 3.6 percent. That would be a larger raise than the 2.8 percent retirees received for 2026. But the figure that matters is the one that reaches your bank account after the Medicare Part B deduction, and that is a different number.
How the COLA Is Actually Calculated
The COLA uses the Consumer Price Index for Urban Wage Earners and Clerical Workers, abbreviated CPI-W. The Social Security Administration averages CPI-W for July, August and September, then compares that average to the same three months a year earlier. The percentage difference becomes the COLA.
Two consequences follow that surprise people:
Current Projections — Updated as Data Arrives
For context, the 2026 COLA was 2.8 percent, and the historical average sits around 2.6 percent.
Note: These are third-party projections, not official figures. They have moved month to month as inflation data has arrived, and two more CPI-W reports remain before the calculation is final.
What a Mid Three Percent COLA Would Mean in Dollars
The average retired worker benefit has been running in the region of two thousand dollars per month. A COLA in the mid three percent range would translate to an increase of roughly seventy dollars per month on that average benefit. These figures are illustrative.
Your own increase depends entirely on your own benefit amount. The COLA is applied as a percentage, so a larger benefit receives a larger dollar increase.
You will receive a personalized COLA notice in December stating your exact 2027 benefit amount, including the Medicare deduction.
The Medicare Offset Nobody Budgets For
Medicare Part B premiums are generally deducted directly from Social Security benefits. When the Part B premium rises, it eats into the COLA before the money reaches you.
In some recent years the Part B increase has consumed a substantial share of the raise, leaving retirees with a much smaller net increase than the headline percentage suggested.
The Part B premium for the following year is typically announced in the same general period as the COLA. Until both numbers are known, the headline COLA percentage is only half the picture.
The practical advice — wait for your December notice before building your 2027 budget. That letter shows the net figure.
Why COLA Does Not Solve the Whole Problem
Social Security is, for many retirees, the only meaningful source of income that adjusts for inflation every year. That makes it valuable and worth maximizing. Our guide on how to maximize Social Security covers the timing decisions that permanently affect your benefit.
But most other retirement income does not adjust:
So a rising COLA on one income stream sits alongside several that are quietly losing purchasing power. Our post on can you lose money in an annuity covers inflation as one of the real risks in a guaranteed contract, and annuity for spouse protection covers what happens to that income for a surviving spouse.
What Retirees Can Actually Do About It
Key Dates
Final Thoughts
A mid three percent COLA would be the largest increase retirees have seen in several years, and it is genuinely good news. It also applies to only one part of most retirement income plans, and the Medicare deduction will absorb some of it before it reaches you. The useful question is not what the COLA will be, but how much of your total retirement income adjusts for inflation at all. A licensed independent advisor can map that with you — at no cost and no obligation. You can request a free annuity review, find a local annuity advisor near you, or schedule a free consultation whenever you are ready.