The social security cost-of-living adjustment for 2027 is currently projected at 3.6%, but the final increase has not yet been determined. The Social Security Administration will calculate the official adjustment after the remaining inflation data for August and September become available, with the final announcement expected on October 14, 2026.
The latest projection comes as millions of Americans wait to learn how much their monthly Social Security payments could increase next year. The current forecast is higher than the 2.8% increase applied to benefits in 2026.
However, the 3.6% figure remains an estimate. It is not an official government determination. The final number depends on a specific inflation formula that uses Consumer Price Index data from the third quarter of 2026.
That means the next two inflation reports will play a major role in determining the size of the 2027 increase.
Latest 2027 Social Security COLA Update
The latest projection from The Senior Citizens League puts the 2027 adjustment at 3.6%. The organization lowered its forecast after the July inflation report, moving from its earlier 3.8% projection.
The 3.6% forecast would represent an increase of 0.8 percentage points over the 2.8% adjustment used for 2026.
Another major senior advocacy organization, AARP, placed its latest projection at 3.5% in August. The difference between the two estimates highlights why the final figure cannot yet be known.
For now, the most important facts are:
- The 2027 adjustment has not been officially announced.
- The latest Senior Citizens League projection is 3.6%.
- AARP’s latest projection was 3.5%.
- The 2026 adjustment was 2.8%.
- August CPI data is scheduled for release on September 11, 2026.
- September CPI data is scheduled for release on October 14, 2026.
- The official 2027 adjustment is expected to be announced on October 14.
- The increase will apply to benefits payable beginning in late 2026 for SSI and in January 2027 for Social Security benefits, following the applicable payment schedules.
The September inflation report is especially important because September is the final month used in the calculation.
Why the 2027 Increase Has Not Been Finalized
The Social Security Administration does not simply use the overall annual inflation rate to determine the yearly benefit adjustment.
Federal law uses the Consumer Price Index for Urban Wage Earners and Clerical Workers, commonly known as CPI-W. The calculation looks at the average CPI-W for July, August and September and compares that average with the corresponding third-quarter average from the previous year.
The formula creates an important timing issue.
The July inflation number is already available, but August data will not be released until September 11. September data will arrive on October 14.
As a result, no one can accurately state the final 2027 increase on September 9.
Current projections can provide a useful indication, but they can still change before the government announces the official number.
July Inflation Data Gives the Latest Clue
The latest available CPI report covers July 2026.
The Bureau of Labor Statistics reported that the CPI-W increased 3.4% over the 12 months ending in July. The CPI-W reached an index level of 327.104 on an unadjusted basis.
Overall consumer inflation also increased 3.4% during the same 12-month period.
The July report showed several notable movements in household costs. The overall CPI increased 0.1% on a seasonally adjusted basis during July after declining 0.4% in June. Food prices increased 0.1%, while the energy index declined 1.5% during the month.
Energy remained an important part of the inflation picture. The energy index was 14.7% higher over the 12 months ending in July, while gasoline prices were 24.6% higher over that period.
Those inflation movements matter because the CPI-W is central to the annual benefit adjustment.
The July result also explains why the latest projection does not simply equal 3.4%. The government formula uses a three-month third-quarter average rather than one month’s annual inflation rate.
August CPI Report Is the Next Major Milestone
The next major date is September 11, 2026.
That is when the Bureau of Labor Statistics is scheduled to publish the August CPI report. The report will provide another month of data needed for the 2027 calculation.
August will not determine the final adjustment by itself.
Instead, it will be combined with July and September data. The September number remains the final piece of the third-quarter calculation.
This is why the 3.6% forecast could still move higher or lower before the official announcement.
If inflation during the remaining months differs from what current forecasting models anticipate, estimates could change accordingly.
October 14 Is the Key Date for the Official Number
October 14, 2026, is expected to be the most important date for beneficiaries watching the 2027 adjustment.
The Bureau of Labor Statistics has scheduled the September 2026 CPI release for October 14 at 8:30 a.m. Eastern Time. That report will provide the final month needed for the third-quarter inflation calculation.
The Social Security Administration is expected to announce the official 2027 adjustment after the required inflation information becomes available.
This timing follows the normal annual process.
The government needs the July, August and September CPI-W figures before it can complete the calculation. Once those figures are available, the final percentage can be determined.
Until then, any specific 2027 percentage should be treated as a forecast rather than a confirmed benefit increase.
How the Social Security Adjustment Is Calculated
The calculation has a defined structure under federal law.
The Social Security Administration uses the average CPI-W for the third quarter. That means July, August and September become the three months that determine the inflation measure used for the annual adjustment.
The third-quarter average is then compared with the corresponding average from the previous year.
If the increase reaches the required threshold, benefits receive an adjustment based on the resulting percentage. The system uses the inflation measure established by law rather than a separate measure created specifically for retirees.
Automatic annual adjustments began in 1975. Before that change, benefit increases generally required special legislation from Congress.
The system has therefore been providing automatic annual inflation adjustments for decades.
How 2027 Compares With the 2026 Increase
The 2026 adjustment was 2.8%.
That increase became effective with Social Security benefits payable in January 2026. Supplemental Security Income payments received the increase earlier because of the program’s payment schedule.
The latest 2027 projection of 3.6% would therefore be noticeably higher than the current year’s adjustment.
The comparison looks like this:
| Year | COLA status |
|---|---|
| 2024 | 3.2% |
| 2025 | 2.5% |
| 2026 | 2.8% |
| 2027 | 3.6% projected |
The 2024, 2025 and 2026 figures are official adjustments. The 2027 figure remains a forecast until the government completes its calculation.
If the 3.6% projection becomes the final figure, it would be the largest annual increase since the 8.7% adjustment implemented in 2023.
It would also exceed the average annual adjustment recorded over the previous decade. The Social Security Administration said the average COLA over the decade preceding the 2026 adjustment was about 3.1%.
What a 3.6% Increase Would Mean for Monthly Benefits
A percentage increase applies to an individual’s existing benefit amount.
For example, a beneficiary receiving $2,000 per month would see a mathematical increase of $72 if the final adjustment were 3.6%. That would produce a monthly benefit of $2,072 before any other changes affecting the payment.
The calculation is straightforward:
Current monthly benefit × 3.6% = estimated increase
However, beneficiaries should not treat that example as a prediction of their individual 2027 payment.
Actual payments differ because Social Security benefits depend on each person’s earnings record, claiming history and benefit type. Other deductions or adjustments can also affect the amount deposited into a beneficiary’s account.
The Senior Citizens League estimates that a 3.6% adjustment would raise an average benefit by roughly $69.75 under the benefit amount used in its August projection.
That figure is also an estimate, not a government-issued payment amount.
Why the Final Increase Could Differ From 3.6%
The biggest reason for uncertainty is that two months of required inflation data remain outstanding.
The latest 3.6% estimate was produced using the information available after the July CPI report. The Senior Citizens League’s model anticipated inflation movements during the remaining part of the third quarter.
Actual inflation could differ from those assumptions.
If the CPI-W readings for August and September are stronger than expected, the final adjustment could be higher than the current projection.
If inflation comes in weaker, the final adjustment could be lower.
That is why headlines describing 3.6% as the confirmed 2027 increase would be premature on September 9.
The government will not have the complete third-quarter data until the September report is released.
The 2027 Increase Would Apply to Several Social Security Programs
The annual adjustment affects benefits tied to Social Security and Supplemental Security Income under the applicable rules.
Social Security retirement benefits receive the annual adjustment. Disability and survivor benefits are also covered by the annual COLA process.
SSI payments receive the adjustment as well, with payment timing governed by the program’s separate schedule.
The exact dollar impact differs from one recipient to another.
A percentage increase does not give every beneficiary the same dollar amount. Someone receiving a larger monthly benefit receives a larger dollar increase, while someone with a smaller benefit receives a smaller dollar increase.
That makes the final percentage more important than any single dollar figure used in an estimate.
When Beneficiaries Will See the Increase
The official percentage is expected in October, but beneficiaries will not receive an immediate payment containing the new amount simply because the announcement has been made.
The adjustment is tied to the applicable benefit payment schedule.
For Social Security beneficiaries, the increase will be reflected in payments beginning in January 2027. SSI has a different payment calendar because January 1 is a federal holiday, which affects when the payment is issued.
The Social Security Administration also provides beneficiaries with notices showing their updated benefit information.
The agency has said COLA notices are distributed during December. Beneficiaries can also use their online Social Security account to access benefit information.
The 2026 Increase Remains the Current Official Figure
Until the government announces the 2027 adjustment, 2.8% remains the latest officially established annual COLA.
The Social Security Administration announced that increase in October 2025. It applied to nearly 71 million Social Security beneficiaries beginning in January 2026, while nearly 7.5 million SSI recipients received increased payments beginning December 31, 2025.
The agency also reported that the average Social Security retirement benefit increased by about $56 per month when the 2.8% adjustment took effect.
The 2027 estimate should therefore be viewed as the next potential adjustment rather than a replacement of the current official figure.
What Beneficiaries Should Watch Before October
Several dates now matter for anyone following the 2027 adjustment.
September 11, 2026: The August CPI report is scheduled for release.
October 14, 2026: The September CPI report is scheduled for release, completing the third-quarter inflation data used in the calculation.
October 14, 2026: The official 2027 adjustment is expected to be announced.
December 2026: Beneficiaries can expect information about their updated benefit amounts.
January 2027: The new adjustment is expected to appear in Social Security payments.
The dates make September and October particularly important for anyone planning around next year’s Social Security income.
Why the CPI-W Matters So Much
The CPI-W is not just another inflation statistic in the annual Social Security process.
Federal law specifically links the annual adjustment to this index. It measures price changes experienced by urban wage earners and clerical workers, rather than using a spending basket designed exclusively around older Americans.
This distinction has produced an ongoing debate over whether another inflation measure would better reflect the expenses faced by retirees.
The important point for the 2027 calculation is that the existing legal formula remains in place.
Unless federal law changes, the Social Security Administration will use the established CPI-W methodology to determine the annual adjustment.
What the Latest Forecast Means Right Now
The current picture is clearer than it was earlier in 2026, but the final number remains unresolved.
The Senior Citizens League’s forecast has moved downward during the year. Its latest 3.6% estimate is below its earlier 3.9% forecast from May and its subsequent 3.8% projections.
AARP’s latest estimate of 3.5% is slightly lower than the Senior Citizens League’s forecast.
Both forecasts still point toward an increase above the 2.8% adjustment used for 2026.
But the remaining CPI reports will determine whether those forecasts hold.
For beneficiaries, the most reliable approach is to distinguish between estimates and confirmed government figures.
At this stage, 3.6% is the leading published projection from the Senior Citizens League, not the official 2027 adjustment.
Bottom Line on the 2027 Increase
The 2027 Social Security increase is entering its final stage of calculation.
The latest projection stands at 3.6%, while another major forecast puts the increase at 3.5%. Both are above the official 2.8% adjustment applied in 2026.
The July CPI-W increased 3.4% over the year, providing the first completed month of the third-quarter calculation. August data will arrive September 11, followed by September data on October 14.
Those final numbers will determine the official adjustment.
Until the Social Security Administration announces the figure, beneficiaries should not assume that 3.6% is guaranteed. The projection provides a useful indication of where the increase could land, but only the completed federal calculation will establish the actual 2027 benefit adjustment.
What do you expect the final 2027 increase to be? Share your thoughts and stay updated as the official Social Security announcement approaches.