Social Security 2027 COLA Increase: Latest Estimate Is 3.8%

The Social Security 2027 COLA increase is projected at 3.8% by TSCL, up from 2.8% in 2026. Here's what it means for your benefits and when it becomes official.

If you rely on Social Security, one number matters more than almost any other each year: the cost-of-living adjustment, or COLA. The latest estimate for the Social Security 2027 COLA increase is 3.8%, according to The Senior Citizens League — a full percentage point higher than the 2.8% retirees received for 2026.

But that figure is a projection, not the official number, which will not arrive until October 2026. Here is what the 3.8% estimate means in real dollars, how it stacks up against last year, who is behind the forecast, how the official COLA is actually calculated, and why the final figure could still move.

The latest Social Security 2027 COLA increase estimate is 3.8%, according to The Senior Citizens League (TSCL). It is a projection, not the official figure, which arrives in October 2026.

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Under a 3.8% COLA, TSCL estimates the average monthly benefit would rise about $73.62, from roughly $1,937.53 to $2,011.15.

A 3.8% COLA would be a full percentage point higher than the 2.8% adjustment retirees received for 2026.

The Senior Citizens League is a nonpartisan seniors' advocacy group that issues a monthly COLA projection using a model based on the Consumer Price Index, Federal Reserve interest rates and unemployment.

Independent analyst Mary Johnson recently estimated the 2027 COLA at 3.7% after the June inflation report, down sharply from her earlier 4.7% projection.

The Social Security Administration sets the COLA using the CPI-W for July, August and September, compared with the same three months a year earlier.

The official 2027 COLA is expected in October 2026 and would take effect with January 2027 benefit payments.

Because the COLA depends on July-September inflation data that is not yet complete, the final 2027 figure could land above or below 3.8%.

A higher COLA helps, but rising Medicare Part B premiums and everyday costs can eat into the gain, so the real boost to spending power is often smaller than the headline number.

The 3.8% figure is a projection from TSCL, not an official Social Security Administration number. Estimates vary and will change before October.

Common questions about the Social Security 2027 COLA increase, the estimate, and when it becomes official.

The latest estimate for the Social Security 2027 COLA increase is 3.8%, according to The Senior Citizens League (TSCL). It is a projection based on economic data so far in 2026. The official figure will be announced by the Social Security Administration in October 2026 and could differ.

No. The 3.8% figure is a projection from The Senior Citizens League, not an official number. The Social Security Administration sets the official COLA using inflation data from July through September, and it will not be announced until October 2026. The final figure could be higher or lower.

The Social Security Administration is expected to announce the official 2027 COLA in mid-October 2026, after the September inflation report is released. The increase would then take effect with benefit payments in January 2027.

The 2026 Social Security COLA was 2.8%. If the 2027 adjustment comes in at the projected 3.8%, it would be a full percentage point higher than the increase retirees received for 2026.

The COLA is based on the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). The Social Security Administration compares the average CPI-W for July, August and September with the same three months of the previous year, and the percentage increase becomes the COLA.

TSCL stands for The Senior Citizens League, a nonpartisan advocacy group for older Americans. It publishes a monthly Social Security COLA projection using a model that factors in the Consumer Price Index, Federal Reserve interest rates and unemployment.

It can. Medicare Part B premiums are usually deducted from Social Security payments and often rise each year, which can absorb part of the COLA. The 2027 Part B premium had not been set at the time of writing, so the net increase in your check may be smaller than the headline COLA.

A projected 3.8% COLA would be a solid raise for 2027, but it remains an estimate until the Social Security Administration makes it official in October.