As of August 2026, no official 2027 Social Security cost-of-living adjustment (COLA)—the annual inflation-based benefit change—has been announced. The new information is July inflation data, but August and September figures will determine what happens next. The Social Security Administration says it will announce the next COLA in October 2026, so every percentage circulating now is an estimate. SSA's current COLA update confirms that timetable.
Table of Contents
- What changed in August?
- How will the 2027 COLA be calculated?
- What could a COLA mean for your actual check?
- What should retirees do next?
What changed in August?
The Bureau of Labor Statistics released July's Consumer Price Index for Urban Wage Earners and Clerical Workers, or CPI-W, on August 12. CPI-W was unchanged during July and stood 3.4% above its year-earlier level, according to the BLS consumer-price report. July is only the first of three months used in the cola calculation.
A flat monthly reading does not mean there will be no adjustment, and the 3.4% year-over-year rate is not the future COLA percentage. Meanwhile, the 2.8% COLA for 2026 is already in effect. It reached about 75 million social Security and Supplemental Security Income recipients, with nearly 71 million Social Security beneficiaries receiving the increase beginning in January 2026.
How will the 2027 COLA be calculated?
SSA will compare the average CPI-W for July, August, and September 2026 with the third-quarter average from the last year in which a COLA became effective. The percentage increase is rounded under the statutory formula; if there is no increase, there is no COLA. SSA explains this process in its current COLA methodology. This method makes August and September decisive.
A strong rise in either month could lift the three-month average, while weaker readings could pull it down. July alone cannot establish a reliable percentage. Retirees should also be cautious with forecasts based on broader inflation measures or a single headline number. The legal calculation uses CPI-W and the full third-quarter average, not one month's year-over-year rate.
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What could a COLA mean for your actual check?
A published COLA percentage does not translate into the same dollar increase for everyone. SSA applies the adjustment to each person's primary insurance amount, then accounts for rounding and applicable offsets. For context, the 2026 COLA raised SSA's estimated average retired-worker benefit from $2,015 to $2,071 per month. That $56 average change is useful for scale, but it does not predict any individual payment.
Medicare can also reduce the amount that reaches a retiree's budget. The standard Part B premium increased by $17.90 in 2026, reaching $202.90 per month, while the annual deductible rose by $26 to $283. The 2027 Part B premium has not been set. The 2026 Medicare Trustees Report estimates a standard monthly premium of $209.50, but financing rates are established only through December 31, 2026. Treat $209.50 as a planning projection, not a confirmed deduction.
What should retirees do next?
Build a range into the household budget instead of committing spending to an unofficial COLA estimate. Compare any possible benefit increase with expected Medicare deductions and other fixed expenses before treating it as additional disposable income.
A practical sequence is: The September CPI report completes the three-month data set SSA needs. Those release dates appear on the BLS CPI schedule, making October 14 the key date for evaluating the calculation before SSA announces the official result.
- Keep the current 2026 benefit amount as the budget baseline.
- Review the August CPI release on September 11.
- Review the September CPI release on October 14.
- Wait for SSA's official October announcement before revising 2027 income.
- Check the eventual Medicare premium separately rather than assuming the full COLA will reach the bank account.
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