To qualify for IBR, a borrower must demonstrate a “partial financial hardship.” A formula using adjusted gross income (AGI), family size and state of residence will determine how much a borrower is able to pay. If that amount is less than the monthly amount required under the standard 10-year
repayment plan, that student would be eligible for IBR.
You monthly payment will be 0$ if your AGI is less than 150% of the federal government’s established poverty line of $12,880 in 2021. That means your income would have to be under $19,320. In addition, if a monthly IBR payment doesn’t cover the loan’s interest, the federal government will pay the unpaid accrued interest on a subsidized Stafford loan for up to three years from the time an IBR plan is implemented.