Monthly Social Security and Supplemental Security Income (SSI) benefits for more than 60 million Americans will increase 3.6 percent in 2012, the Social Security Administration announced Wednesday.The 3.6 percent cost-of-living adjustment (COLA) will begin with benefits that nearly 55 million Social Security beneficiaries receive in January 2012. Increased payments to more than 8 million SSI beneficiaries will begin on Dec. 30, 2011.Some other changes that take effect in January of each year are based on the increase in average wages. Based on that increase, the maximum amount of earnings subject to the Social Security tax (taxable maximum) will increase to $110,100 from $106,800.