About 75 million Americans will learn on Oct. 14 how much Social Security benefits are expected to increase in 2027. Analysts currently estimate a cost-of-living adjustment (COLA) of about 3.5%, but the final figure could be lower — and rising household costs may quickly consume much of the increase.
The projected 3.5% adjustment would be the largest since 2022, when inflation pushed the COLA to 8.7%. Beneficiaries received a 2.8% increase at the start of 2026.
How the 2027 COLA Is Calculated
The COLA is based on average inflation from July through September, compared with the average for the same three months a year earlier. September inflation data will be released the morning of Oct. 14, with the official COLA announced shortly afterward.
The 3.5% estimate would exceed the Medicare trustees’ projected 3.25% increase in Medicare Part B premiums. That doesn’t happen often: Part B premiums rose faster than the COLA in each of the last three years and in seven of the past 10 years, according to The Senior Citizens League, a nonprofit that advocates for seniors. Over this decade, Part B premiums have increased an average of 5.3% a year, while COLAs have averaged 3.1%. The final 2027 Part B premium is expected to be announced between late October and early November.
“Unfortunately, while the government does have some measures in place to protect seniors from their health care costs rising faster than their incomes, those measures generally fall short,” the Senior Citizens League said in a blog post.
How Reliable Are the Forecasts?
Analysts issue monthly COLA forecasts based on the latest inflation data, even though the adjustment depends only on inflation in July, August and September. Early estimates are less reliable because they are made before those months’ data is available, and inflation can change throughout the year.
For example, the 2027 estimate stood at 1.2% based on January inflation, before the conflict with Iran sent energy prices higher. The final COLA could still rise or fall depending on September’s inflation report.
“Could the COLA push higher to 3.6% given recent climbs in gasoline and utility prices?” asked Mary Johnson, an independent Social Security and Medicare analyst. She said that would require a particularly steep month-to-month inflation jump — one seen only once in the past 26 years, in 2005 — and called it unlikely, while cautioning that current events make predictions difficult.
AARP predicted a 3.6% COLA last month. Johnson sees a 50-50 chance that the estimate could instead dip from 3.5% to 3.4%, based on historical inflation patterns. The Senior Citizens League also forecasts 3.5%, while the Committee for a Responsible Federal Budget, a nonpartisan think tank, forecast 3.4% last month.
A tenth of a percentage point would mean about $20 a month for someone with an average $2,000 Social Security benefit, Johnson said.
Why Retirees Track Estimates
Although early COLA estimates aren’t the most accurate, they can help retirees budget and plan, analysts said. Monthly updates offer a glimpse of what third-quarter inflation could mean for financial decisions such as renewing a certificate of deposit or setting a budget, Johnson said.
Higher Costs Could Eat Into the Increase
Any of the 2027 COLA estimates between 3.4% and 3.6% would exceed the Medicare trustees’ forecast for Part B premiums to rise 3.25%, or $6.60 a month, to $209.50 in 2027. But analysts say other expected expenses could absorb much or all of the remaining increase:
- Heating a home with oil this winter is expected to cost 50% more than last winter, according to the National Energy Assistance Directors Association, which represents state directors of the federal Low-Income Home Energy Assistance Program.
- Continued fighting in the Middle East is expected to keep gasoline and diesel prices high for the foreseeable future.
- Some Medicare Part D enrollees without low-income subsidies may lose access to zero-dollar premiums. Nonprofit health researcher KFF says 28% of those enrollees — about 4 million people — paid no monthly premium in 2026. Johnson said her own Part D plan’s premium is rising from zero in 2026 to more than $19 a month in 2027.
Reporting by Medora Lee, USA TODAY. USA TODAY Network via Reuters Connect.
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