2027 Social Security COLA Announcement: October 14 Date, Latest Estimate & What September CPI-W Needs to Be
2027 Social Security COLA Announcement
Social Security beneficiaries are now just one inflation report away from knowing the official 2027 cost-of-living adjustment.
The critical date is:
October 14, 2026
The U.S. Bureau of Labor Statistics is scheduled to release the September Consumer Price Index report at:
8:30 a.m. Eastern Time
That report will include the September Consumer Price Index for Urban Wage Earners and Clerical Workers, or CPI-W.
September CPI-W is the final missing number needed to calculate the 2027 Social Security COLA.
Two major forecasts currently put the adjustment near the mid-3% range:
The Senior Citizens League: 3.5%
AARP: 3.6%
Neither estimate is official.
The exact 2027 COLA will depend on the September CPI-W reading and Social Security’s statutory calculation.
Because July and August CPI-W are already known, we can now calculate approximately what September inflation would need to show for the final COLA to round to 3.4%, 3.5%, 3.6% or higher.
When Will the 2027 Social Security COLA Be Announced?
The key date is:
Wednesday, October 14, 2026
BLS has scheduled the September 2026 Consumer Price Index report for:
8:30 a.m. ET
Social Security says it will announce the next COLA in October 2026.
The September CPI-W release should provide the last number necessary to calculate the adjustment.
Official BLS schedule:
September 2026 CPI Release Schedule
Official Social Security COLA page:
Social Security Administration — Cost-of-Living Adjustment
Latest 2027 Social Security COLA Estimates
Two widely followed forecasts currently differ by only one-tenth of a percentage point.
The Senior Citizens League: 3.5%
The Senior Citizens League issued its final pre-announcement forecast after the August inflation report and projects:
3.5%
That would be higher than the official:
2.8% COLA for 2026
Difference:
3.5% − 2.8% = 0.7 percentage point
Read the current TSCL forecast:
The Senior Citizens League — 2027 COLA Forecast
AARP: 3.6%
AARP currently forecasts:
3.6%
AARP says its projection uses current inflation information and estimates for September.
Read the current forecast:
AARP — 2027 Social Security COLA Estimate
For planning purposes, the most closely watched range is therefore:
3.5%–3.6%
But the final September CPI-W—not forecasts—will determine the official adjustment.
The CPI-W Numbers We Already Know
Social Security calculates COLA using the average CPI-W for:
July
August
and:
September
The 2025 third-quarter CPI-W values were:
| Month | 2025 CPI-W |
|---|---|
| July | 316.349 |
| August | 317.306 |
| September | 318.139 |
| Q3 average | 317.265 |
For 2026, BLS has already published:
| Month | 2026 CPI-W |
|---|---|
| July | 327.104 |
| August | 328.481 |
| September | Pending October 14 |
That means two-thirds of the calculation is already known.
The only remaining variable is September.
How Social Security Calculates the 2027 COLA
The official formula is:
COLA = [(2026 Q3 CPI-W average − 2025 Q3 CPI-W average) ÷ 2025 Q3 average] × 100
The 2025 comparison average is:
317.265
Once September CPI-W is known, Social Security can calculate:
(July + August + September) ÷ 3
and compare that result with 317.265.
The percentage increase is rounded to the nearest one-tenth of 1%.
For a deeper explanation, see our guide to how Social Security COLA is calculated using CPI-W.
What Does September CPI-W Need to Be for a 3.5% COLA?
This is where the calculation becomes especially useful.
With July at:
327.104
and August at:
328.481
September CPI-W would need to reach approximately:
329.047 or higher
for the final calculation to enter the range that rounds to:
3.5%
That is only about:
0.17% above August’s CPI-W
So a 3.5% COLA does not require an unusually large September increase.
What Would It Take to Reach a 3.6% COLA?
For the calculation to move into the range that rounds to 3.6%, September CPI-W would need to be approximately:
330.000 or higher
Compared with August’s:
328.481
that would require an increase of roughly:
0.46%
between August and September.
That helps explain why AARP’s 3.6% forecast is somewhat more dependent on another firm inflation reading.
September CPI-W Thresholds for Each Possible COLA
Using Social Security’s published formula and the already-final July and August readings, the approximate September CPI-W ranges are:
| Final 2027 COLA | Approximate September CPI-W range |
|---|---|
| 3.4% | 328.095 to below 329.047 |
| 3.5% | 329.047 to below 330.000 |
| 3.6% | 330.000 to below 330.951 |
| 3.7% | 330.951 to below 331.902 |
Compared with August’s CPI-W of 328.481:
| COLA | Approx. September change from August |
|---|---|
| 3.4% | roughly -0.12% to +0.17% |
| 3.5% | roughly +0.17% to +0.46% |
| 3.6% | roughly +0.46% to +0.75% |
| 3.7% | roughly +0.75% to +1.04% |
These are mathematical ranges based on the published July and August CPI-W readings and Social Security’s rounding method.
They are not forecasts of September inflation.
What If September CPI-W Does Not Change From August?
Suppose September CPI-W were exactly the same as August:
328.481
The 2026 third-quarter average would be:
(327.104 + 328.481 + 328.481) ÷ 3
which equals approximately:
328.022
Now compare that with the 2025 third-quarter average:
317.265
Calculation:
(328.022 − 317.265) ÷ 317.265 × 100
≈
3.39%
Rounded to the nearest tenth:
3.4% COLA
So if CPI-W were essentially flat between August and September, the result would likely round to approximately:
3.4%
Why Are Forecasts at 3.5% and 3.6%?
Forecasters are not assuming September remains flat.
They are estimating how consumer prices may behave during the final month of the calculation.
The Senior Citizens League currently forecasts:
3.5%
AARP forecasts:
3.6%
The difference between those two outcomes is relatively small.
For a $2,000 monthly benefit:
3.5% COLA
$2,000 × 3.5% = $70
Estimated gross benefit:
$2,070
3.6% COLA
$2,000 × 3.6% = $72
Estimated gross benefit:
$2,072
Difference:
$2 per month
or:
$24 per year
For individual retirees, the difference between the two forecasts is therefore modest.
How Much Could Your Social Security Check Increase?
Here are simplified examples.
| Current monthly benefit | At 3.4% | At 3.5% | At 3.6% |
|---|---|---|---|
| $1,000 | $1,034 | $1,035 | $1,036 |
| $1,500 | $1,551 | $1,552.50 | $1,554 |
| $2,000 | $2,068 | $2,070 | $2,072 |
| $2,500 | $2,585 | $2,587.50 | $2,590 |
| $3,000 | $3,102 | $3,105 | $3,108 |
| $4,000 | $4,136 | $4,140 | $4,144 |
| $5,000 | $5,170 | $5,175 | $5,180 |
These are simplified gross-benefit calculations.
Actual Social Security payments can differ because of SSA rounding rules, benefit type, Medicare deductions, taxes and other withholding.
You can calculate your own estimate using our Social Security COLA 2027 Calculator.
How Much Would the Average Retired Worker Receive?
AARP reports that the average retired-worker benefit was approximately:
$2,086 per month
Using that figure:
At 3.5%
$2,086 × 0.035 = $73.01
Estimated monthly benefit:
about $2,159
At 3.6%
$2,086 × 0.036 = $75.10
Estimated benefit:
about $2,161
The difference between the two scenarios is approximately:
$2 per month
Again, these are estimates before deductions.
Will Medicare Reduce the Increase Retirees Actually See?
Potentially, yes.
Many retirees have their Medicare Part B premium deducted directly from Social Security.
The official 2026 standard Part B premium is:
$202.90 per month
The Medicare Trustees currently project the 2027 standard premium at:
$209.50
Projected increase:
$209.50 − $202.90 = $6.60 per month
But the $209.50 figure is still a projection—not the final CMS premium.
For example, assume a retiree receives:
$2,000 per month
and the final COLA is:
3.5%
Gross COLA increase:
$70
If the Part B premium increased by the projected $6.60:
$70 − $6.60 = $63.40
So approximately $63.40 of the monthly increase would remain after accounting only for the additional standard Part B premium.
For the full analysis, read our 2027 Medicare Part B Premium vs. Social Security COLA guide.
Does the Headline CPI Determine Social Security COLA?
No.
This is one of the most common misunderstandings.
The inflation number most frequently reported in the news is:
CPI-U
Social Security uses:
CPI-W
The two measures are related but can move differently.
In August 2026, BLS reported:
CPI-U: +3.4% year over year
while CPI-W was approximately:
+3.5% year over year
Social Security also does not simply use September’s year-over-year CPI-W percentage.
It averages the actual CPI-W index levels for July, August and September.
That average is then compared with the previous relevant third-quarter average.
What Happens on October 14?
At 8:30 a.m. ET, BLS is scheduled to publish the September CPI report.
The report should provide September CPI-W.
Once that number is available, the calculation becomes:
(327.104 + 328.481 + September CPI-W) ÷ 3
Then:
[(2026 Q3 average − 317.265) ÷ 317.265] × 100
Finally, the result is rounded to the nearest:
0.1%
That produces the official annual COLA percentage under Social Security’s methodology.
When Will Higher Social Security Payments Begin?
The COLA determined from 2026 inflation becomes effective for Social Security benefits payable for December.
Most Social Security recipients will see the higher amount in their:
January 2027 payment
Supplemental Security Income payments operate on a slightly different payment schedule around the beginning of the year.
SSA will publish official payment amounts and schedules after the COLA is finalized.
Will SSDI Increase Too?
Yes.
Social Security Disability Insurance benefits receive the same annual COLA percentage.
For example, if someone currently receives:
$1,600 per month
a 3.5% increase would be:
$1,600 × 0.035 = $56
Estimated new gross benefit:
$1,656
At 3.6%:
$1,657.60
Actual SSA calculations are subject to the agency’s benefit rules and rounding.
Will SSI Increase in 2027?
The annual Social Security COLA also affects federal Supplemental Security Income payment standards.
However, the official 2027 SSI maximum amounts have not yet been published.
Once the COLA is final, SSA will release updated SSI and other Social Security program figures.
Is a Bigger COLA Good News?
Not necessarily in the way people sometimes assume.
A larger COLA generally means inflation has been higher.
The adjustment exists to help protect Social Security beneficiaries against lost purchasing power.
Higher benefits may arrive alongside higher costs for:
- groceries;
- housing;
- energy;
- health care;
- insurance;
- transportation; and
- other necessities.
A 3.5% or 3.6% COLA does not automatically mean retirees are 3.5% or 3.6% better off financially.
How Does 2027 Compare With Recent COLAs?
The official 2026 Social Security COLA is:
2.8%
If the 2027 adjustment is 3.5%:
3.5 − 2.8 = 0.7 percentage point higher
If the adjustment is 3.6%:
3.6 − 2.8 = 0.8 percentage point higher
Either current forecast would therefore represent a larger increase than beneficiaries received for 2026.
For a broader look at retirement age, benefit limits and other annual changes, see our 2027 Social Security Benefit Changes guide.
What Should Social Security Recipients Do Before October 14?
There is no need to make a financial decision based on a forecast alone.
Instead:
- Know your current gross Social Security benefit.
- Use the 3.4%–3.6% range for temporary budgeting.
- Wait for the September CPI-W release.
- Check the official SSA COLA announcement.
- Update your projected Medicare deductions once CMS releases final 2027 Part B costs.
- Use your official SSA COLA notice for your final retirement budget.
The difference between a 3.5% and 3.6% COLA is relatively small for most individual benefit amounts.
The bigger planning question may ultimately be how much of the increase remains after Medicare and other costs.
Frequently Asked Questions
When will the 2027 Social Security COLA be announced?
The September CPI report is scheduled for October 14, 2026 at 8:30 a.m. ET. SSA says the next COLA will be announced in October 2026.
What is the latest 2027 Social Security COLA estimate?
The Senior Citizens League currently forecasts 3.5%, while AARP forecasts 3.6%.
Is the 2027 COLA officially 3.5%?
No.
The September CPI-W has not yet been published, so no 2027 COLA percentage is official yet.
What does September CPI-W need to be for a 3.5% COLA?
Based on the already-published July and August values, September CPI-W would need to be approximately 329.047 or higher to enter the range that rounds to 3.5%.
What does CPI-W need to be for a 3.6% COLA?
September CPI-W would need to be approximately 330.000 or higher for the calculation to enter the range that rounds to 3.6%.
What happens if September CPI-W stays the same as August?
If September matched August’s 328.481 reading, the final calculation would be approximately 3.39%, which rounds to a 3.4% COLA.
How much would a $2,000 Social Security check increase?
At 3.5%, the increase would be approximately:
$70 per month
At 3.6%:
$72 per month
Will Medicare reduce my Social Security increase?
Higher Medicare premiums can reduce the amount of the COLA that appears in a beneficiary’s net payment. The final 2027 Part B premium has not yet been announced.
Will SSDI get the same COLA?
Yes. SSDI benefits receive the same annual COLA percentage used for Social Security retirement benefits.
Will SSI increase?
Yes, the COLA affects federal SSI payment standards, but the official 2027 SSI maximum amounts are not yet available.
Bottom Line
Social Security beneficiaries are now one inflation report away from knowing the official 2027 COLA.
The date to watch is:
October 14, 2026
at:
8:30 a.m. Eastern Time
The two known CPI-W readings are:
July: 327.104
August: 328.481
September is the final missing number.
Current forecasts are:
3.5% — The Senior Citizens League
and:
3.6% — AARP
Based on Social Security’s formula:
- roughly 329.047 or higher for September would put 3.5% in play;
- roughly 330.000 or higher would put 3.6% in play;
- a September reading equal to August would produce roughly a 3.4% COLA after rounding.
None of those outcomes is official yet.
The September CPI-W release will settle the calculation.
Once SSA publishes the official percentage, this page should be updated with the final 2027 COLA, new monthly benefit examples and the latest Medicare impact.
Related Reading on Elite Era Trends
Social Security COLA 2027 Calculator
How Is Social Security COLA Calculated? CPI-W Formula & 2027 Estimate
2027 Medicare Part B Premium vs. Social Security COLA
2027 Social Security Benefit Changes: COLA, Retirement Age and New Limits
