The word "discretionary" refers to something that is not required or mandatory. It means you have the freedom or choice to decide whether or not to do it. Full definition
Monthly payments are capped at 10 to 15 percent of discretionary income, depending on when you took out your loans. (studentloanhero.com)
Under the new rule, members will receive the same amount of discretionary funding, with a potential 25 percent bump for districts that have the highest levels of poverty. (politico.com)
However, when it comes to many of student loan repayment programs offered by the student loan repayment programs offered by the federal government, there's a more precise definition for discretionary income. (loanlab.co)