Social Security's 2027 COLA Estimate: What a 3.6-3.8% Raise Really Means for Retirees
Social Security's 2027 COLA is projected at 3.6% to 3.8%, per AARP and The Senior Citizens League — up from 2026's 2.8%. For the average retired worker earning $2,071 a month, that adds roughly $75 to $79, pushing benefits to about $2,146-$2,149. The Social Security Administration confirms the final number October 14.
How is the 2027 Social Security COLA calculated?
The Social Security Administration sets the annual cost-of-living adjustment by comparing the average Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) across July, August, and September of the current year against the same three months of the prior year. The percentage change, rounded to the nearest tenth, becomes next year's COLA. Because the formula depends entirely on third-quarter data that doesn't exist yet, every number published before October is a projection built from the CPI-W trend so far in 2026 — not a final calculation.
That's why estimates move throughout the year. June 2026 inflation came in at 3.5% annually, cooler than forecasters expected and down from May's three-year high of 4.2%, pulling the 2027 COLA projection down with it.
What are the current 2027 COLA estimates?
Three independent forecasters are tracking the number, and they've converged in a narrow band as of mid-July 2026:
| Forecaster | 2027 COLA estimate | Basis |
|---|---|---|
| The Senior Citizens League | 3.8% | CPI-W trend model, updated monthly; down from 3.9% in May |
| AARP | 3.6% | Analysis of current inflation data |
| Mary Johnson, independent analyst | 3.7% | CPI-W trend projection |
Source: The Senior Citizens League and reporting via CBS News, “June's inflation data showed a big drop. How will that impact the 2027 Social Security COLA?” (July 2026).
How does 2027 compare with recent COLA history?
Even at the low end of the current range, 2027 would mark the second straight year of a larger raise than 2026's 2.8% — though still well below the 8.7% spike of 2023 that followed the post-pandemic inflation surge.
| Year | COLA | Avg. retired-worker benefit |
|---|---|---|
| 2024 | 3.2% | — |
| 2025 | 2.5% | — |
| 2026 | 2.8% | $2,071 (Jan. 2026) |
| 2027 (estimated) | 3.6%-3.8% | ~$2,146-$2,149 |
What would a 3.6% to 3.8% COLA add to your check?
The average retired worker collected $2,071 a month as of January 2026. A 3.6% to 3.8% increase adds roughly $75 to $79 a month, bringing the average to about $2,146 to $2,149. Because COLA is a percentage of your existing benefit rather than a flat dollar amount, retirees with higher current benefits see a larger dollar increase — someone collecting $3,000 a month would gain about $108 to $114, while someone collecting $1,500 would gain roughly $54 to $57.
See how a COLA raise fits your full retirement picture
Our Retirement Savings Calculator lets you model Social Security income alongside your 401(k), IRA, and other savings to see whether a 3.6%-3.8% benefit raise actually closes your retirement income gap.
Will a higher Medicare Part B premium eat into the raise?
Less than it has in recent years. The 2026 Medicare Trustees Report projects the standard Part B premium will rise to $209.50 a month in 2027, up $6.60 (3.3%) from $202.90 in 2026 — a smaller jump than the roughly 5.4% average annual increase Part B premiums have historically seen. If both projections hold, 2027 would be the first year since 2023 that the COLA percentage outpaces the Part B premium increase, meaning retirees enrolled in Medicare would keep more of their raise than they have in several years. The official Part B premium isn't confirmed until CMS announces it later in fall 2026.
Why does Social Security's COLA formula shortchange seniors?
The COLA is pegged to CPI-W, an index built around working-age households where wages make up most household income — not retirees. Critics, including The Senior Citizens League, favor CPI-E (the Consumer Price Index for the Elderly), which weighs categories like healthcare more heavily to reflect actual senior spending patterns. TSCL estimates a senior who retired in 2024 would have collected about $12,000 more in lifetime benefits had COLAs been calculated using CPI-E instead of CPI-W. Switching formulas requires an act of Congress, and lawmakers have been reluctant to act given Social Security's trust fund faces insolvency within roughly six years.
That gap has a measurable cost: TSCL research puts the cumulative loss in Social Security buying power at nearly 14% over the past decade, and in a June 2026 survey, 89% of seniors said the 2026 COLA of 2.8% wasn't enough to keep pace with their actual expenses.
- Budget off the low end — use 3.6% rather than 3.8% until the official number is confirmed, since estimates have already drifted down from May's 3.9% forecast.
- Net out the Medicare Part B increase before counting on the full raise reaching your bank account.
- Model the gap over decades, not one check — a 0.2-percentage-point difference between estimates compounds meaningfully across a 20-30 year retirement.
How can you plan your retirement budget around an uncertain COLA?
The safest approach is to treat every pre-October estimate as a planning range, not a guarantee. Build your household budget around the lower 3.6% figure so an eventual downward revision doesn't create a shortfall, then revisit your numbers once the Social Security Administration confirms the official COLA on October 14, 2026. If you're still years from claiming, the more useful exercise is stress-testing your full retirement income plan — Social Security plus savings — against a range of COLA and market-return scenarios rather than fixating on a single year's adjustment.
Stress-test your retirement plan against multiple scenarios
Our Retirement Planning Model (Monte Carlo) runs a 50-year projection with Monte Carlo percentiles, a 4% rule check, and Social Security claim-age optimization, so a lower-than-expected COLA doesn't derail your plan — no subscription required.
Frequently asked questions about the 2027 Social Security COLA
What is the estimated Social Security COLA for 2027?
As of July 2026, The Senior Citizens League (TSCL) projects a 3.8% COLA for 2027, down from its 3.9% forecast in May. AARP's analysis of current inflation data puts the estimate at 3.6%, and independent analyst Mary Johnson has estimated 3.7%. All three are preliminary — the Social Security Administration sets the official number in October 2026 using September's inflation data.
When will the official 2027 Social Security COLA be announced?
The Social Security Administration is scheduled to announce the official 2027 COLA on October 14, 2026, immediately after the Bureau of Labor Statistics releases September's Consumer Price Index data. The adjustment takes effect with the benefit payment beneficiaries receive in January 2027.
How much more money will a 3.6% to 3.8% COLA add to my check?
The average retired worker collected $2,071 a month as of January 2026. A 3.6% to 3.8% COLA would add roughly $75 to $79 a month, bringing the average benefit to about $2,146 to $2,149. Your personal increase depends on your current benefit amount, since COLA is applied as a percentage, not a flat dollar figure.
How does Social Security actually calculate the COLA?
The Social Security Administration compares the average Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) for July, August, and September of the current year against the same three months of the prior year. The percentage increase, rounded to the nearest tenth of a percent, becomes the COLA. Because the formula only uses third-quarter data, estimates published earlier in the year are projections, not calculations.
Will a higher Medicare Part B premium cancel out the 2027 COLA raise?
Less than in recent years. The 2026 Medicare Trustees Report projects the standard Part B premium will rise to $209.50 a month in 2027, up $6.60 (3.3%) from $202.90 in 2026 — a smaller jump than the roughly 5.4% average annual increase Part B has seen historically. If both projections hold, 2027 would be the first year since 2023 that the COLA percentage outpaces the Part B premium increase, meaning retirees would keep more of their raise than they have in several years.
Why do some critics call the Social Security COLA formula backwards?
The COLA is based on CPI-W, an index built around working-age households where wages make up most income — not retirees. Critics favor CPI-E (Consumer Price Index for the Elderly), which weights categories like healthcare more heavily to match actual senior spending. The Senior Citizens League estimates a senior who retired in 2024 would have collected about $12,000 more in lifetime benefits had COLAs been based on CPI-E instead of CPI-W.
Has Social Security kept up with inflation for retirees?
Not fully, according to TSCL research, which estimates Social Security benefits have lost close to 14% of their buying power over the past decade because CPI-W understates cost growth in categories seniors spend more on, particularly healthcare. In a June 2026 survey, 89% of seniors said the 2026 COLA of 2.8% wasn't enough to keep up with their actual expenses.
How should I plan my retirement budget with an uncertain 2027 COLA?
Budget using the lower end of the published estimates (currently 3.6%) rather than the highest number, since forecasts have already drifted down from May's 3.9% projection as inflation cooled. Model your Social Security income alongside your other retirement accounts using a retirement savings calculator, and revisit your plan once the official figure is confirmed on October 14, 2026 — the gap between a 3.6% and 3.8% COLA is small per check but compounds over a multi-decade retirement.
Data sources: The Senior Citizens League: 2027 COLA Projection (3.8% estimate, average benefit figures, buying-power research). CBS News: 2027 Social Security COLA Estimate (AARP and Mary Johnson estimates, June inflation data, average retired-worker benefit, 89% survey figure). Social Security Administration: Cost-of-Living Adjustment (official CPI-W COLA methodology and history). CMS: 2026 Medicare Trustees Report (2027 Part B premium projection). All benefit and calculator figures independently verified against our Retirement Savings Calculator. Analysis by the staff at accurate.software.