By: Lorie Konish, CNBC

The Social Security cost-of-living adjustment will be 5.9% in 2022, the Social Security Administration announced Wednesday.
The 5.9% COLA will be the biggest boost to Social Security beneficiaries’ checks in about 40 years.
In 2021, the Social Security COLA was 1.3%. The last time the annual adjustment came close to the 2022 figure was in 2009, when beneficiaries saw a 5.8% increase.
More than 64 million Social Security beneficiaries will see the boosts in their monthly checks starting in January. Meanwhile, about 8 million Supplemental Security Income, or SSI, beneficiaries will see the increase starting Dec. 30.
The estimated average monthly benefit for all retired workers will rise to $1,657, up from $1,565.
″Today’s announcement of a 5.9% COLA increase, the largest increase in four decades, is crucial for Social Security beneficiaries and their families as they try to keep up with rising costs,” said Jo Ann Jenkins, CEO of AARP, in a statement.
Social Security’s benefits are adjusted annually using a specific set of consumer price index data, the Consumer Price Index for Urban Wage Earners and Clerical Workers, or CPI-W.
New consumer price index data released Wednesday showed that consumer prices for September rose slightly more than expected.
The National Committee to Preserve Social Security and Medicare said Wednesday that while the COLA increase for 2022 is “welcome news for seniors,” it also points to the need to change the ways the annual adjustments are calculated.
While Social Security beneficiaries confront rising costs of living, the average COLA in the past decade was just 1.65%, the group said. Moreover, in three of the past 12 years, the adjustment was zero.
In addition, the Social Security Administration also announced that the maximum earnings subject to Social Security taxes will be $147,000 in 2022, up from $142,800 in 2021.
Notably, the rate for Medicare Part B premiums for 2022 has not yet been announced. Payments toward those premiums are often deducted directly from Social Security benefit checks.