20 CFR § 408.505 - How do we determine the amount of your SVB payment?
(b) Cost-of-living adjustments in the FBR. The maximum SVB amount will increase whenever there is a cost-of-living increase in the SSI FBR under the provisions of § 416.405 of this chapter. The basic SVB amount following such an increase is equal to 75 percent of the increased FBR.
(c) When we will reduce the amount of your basic benefit. We will reduce your basic benefit by the amount of the other benefit income you receive in that month, as explained in § 408.510.