As of 2015, the base amount for those on Supplemental Security Income disability is $733. The actual monthly payment varies, however, according to the state one lives in, whether or not the receiver is married and whether one has any income.
SSI is a benefit paid to those who have disabilities that make it difficult or impossible to work. The amount of the monthly benefit eligible individuals may receive is often based on their lifetime average earnings. There are several benefit calculators available online that allow individuals to calculate the amount for which they would be eligible. One such calculator is available on the official Social Security website.