I looked it up and I think I read at first that it varies a bit by state but the amount is generally around $8,804.43 for an individual on SSI. If you get SSDI that amount varies depending on what you made during the quarters you worked. Mine comes out to somewhere just over 1/4th to less than 1/3rd of my old monthly salary. I think (it's hard to remember since the old salary had taxes deducted and the like and now all that is deducted is Medicare B and Medicare D.)