If you do not pay your fair share of food and/or shelter, your maximum possible SSI benefits amount may be reduced. Depending on your situation, your ISM may be calculated using SSI's Value of One-Third Reduction (VTR) rule or the Presumed Maximum Value (PMV) rule.
Note: ISM rules usually only apply to adults, not to children under 18 years old. For children, parent-to-child deeming rules usually apply instead.