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Automatic Increases
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Latest Cost-of-Living Adjustment

Automatic Increases

COLA history

How COLA is used

Federal SSI benefit rate

Wage-indexed amounts

What is a COLA?
Legislation enacted in 1973 provides for cost-of-living adjustments, or COLAs. With COLAs, Social Security and Supplemental Security Income (SSI) benefits keep pace with inflation.

No COLA
There will be no increase in Social Security benefits payable in January 2010, nor will there be an increase in SSI payments.

How is a COLA calculated?
The Social Security Act specifies a formula for determining each COLA. In general, a COLA is equal to the percentage increase in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) from the third quarter of one year to the third quarter of the next. If there is no increase, there is no COLA.

COLA Computation
For the December 2009 COLA, we measure the increase (if any) in the average CPI-W from the third calendar quarter of 2008 to the third quarter of 2009. These averages are 215.495 and 211.001 for the third calendar quarters of 2008 and 2009, respectively, and are derived from monthly CPI-Ws developed by the Bureau of Labor Statistics.

Month CPI-W for—
2008 2009
July 216.304 210.526
August 215.247 211.156
September 214.935 211.322
Total 646.486 633.004
Average (rounded
   to the nearest 0.001)
215.495 211.001

Because there is no increase in the CPI-W from the third quarter of 2008 through the third quarter of 2009, there is no COLA.

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Last reviewed or modified October 15, 2009
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