Cleveland Fed projects 3.89% inflation, shaping Social Security 2027 Cola
The Federal Reserve Bank of Cleveland's Inflation Nowcasting tool projected trailing 12-month inflation at 3.89% in May, a reading that could feed into social security 2027 cola calculations. Social Security bases its annual adjustment on inflation readings from the third quarter, so the May number adds another signal to watch before those months arrive.
Cleveland Fed Inflation Nowcasting
On Monday, May 11, the Cleveland Fed tool placed trailing inflation almost 150 basis points above the 2% long-term inflation rate the Federal Reserve has targeted since 2012. U.S. trailing 12-month inflation stood at 2.4% in February, showing the gap that opened between the earlier reading and the May projection.
For Social Security, the adjustment is the piece that tracks inflationary pressure on beneficiaries. The program used a 2.8% cost-of-living adjustment in 2025, and the average monthly retired-worker benefit moved above $2,000 for the first time that year.
Social Security CPI-W Yardstick
Since 1975, Social Security has used the Consumer Price Index for Urban Wage Earners and Clerical Workers as its inflation-measuring yardstick. Only trailing 12-month inflation readings ending in July, August, and September are used to calculate the COLA, which narrows the field to three months each year.
That timing leaves the May forecast outside the calculation window, but it still points to the inflation backdrop that could shape the 2027 adjustment. Social Security payouts have increased by at least 2.5% for five consecutive years, so a stronger inflation run through the third quarter would sit alongside that recent pattern.
Trump and the February Gap
President Trump gave the green light for U.S. military forces to commence attacks against Iran at the end of February, while trailing 12-month inflation was 2.4% that month. The figures place the February reading and the May forecast in the same broader timeline, with the third-quarter CPI-W readings still ahead.
For retirees watching their benefit update, the practical point is simple: the Cleveland Fed's 3.89% May projection is one data point, but the Social Security COLA will turn on July, August, and September CPI-W readings. Those three months will determine whether the current inflation pace carries into the 2027 increase.
