A Preliminary Look at Social Security's 2019 COLA

For better or worse, Social Security is America's most important social program. It's responsible for providing a guaranteed monthly payment to more than 62 million Americans -- 22 million of which are being kept out of poverty by their monthly check -- as well as covering 175 million workers with disability and/or survivors insurance.

With that being said, it's probably no surprise that the biggest event of the year for Social Security recipients occurs in mid-October. Following the release of the Bureau of Labor Statistics' (BLS) September inflation data during the second week of October, the Social Security Administration announces just how much of a "raise" beneficiaries will receive in the upcoming year. The official name for this raise is the "cost-of-living adjustment," or COLA.

A senior man counting a fanned pile of cash bills in his hands.
A senior man counting a fanned pile of cash bills in his hands.

Image source: Getty Images.

Here's how Social Security calculates its annual raise for beneficiaries

Since the Nixon administration passed legislation in 1972 (which began in 1975) to implement an automatic annual COLA for Social Security, the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) has been the program's inflationary tether. The way it works is pretty simple. The average reading from the third quarter of the previous year (that's July through September) serves as the baseline reading, while the average reading from the third quarter of the current year is the comparison. If the average price of the goods and services that the CPI-W measures rises year over year, then beneficiaries get a raise commensurate with the percentage increase, rounded to the nearest 0.1%. If by some chance prices fall from one year to the next (known as deflation), benefits remain the same. They can never decline due to deflation.

In mid-August, the BLS reported data on the CPI-W from July, meaning this was the first of three meaningful figures that will be used to calculate Social Security's COLA in 2019. During July, the CPI-W rose by a healthy 3.2% from the previous year, with energy being the primary upward catalyst. According to a more commonly followed and similar inflationary measure, the Consumer Price Index for All Urban Consumers (CPI-U), gasoline and fuel oil prices rose 25.4% and 34.7%, respectively, on an adjusted 12-month basis.

On Sept. 13, the BLS released its second key data point: August's inflation data. According to the release, the CPI-W rose by 2.9% year over year. Similar to the previous month, energy remained the key driver, with gasoline and fuel oil prices rising 20.3% and 30.9%, respectively, on an adjusted basis over the trailing 12-month period, per the CPI-U. Shelter remained a key inflation driver as well, up 3.4%.