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The Income Based Repayment Program for Student Loans (IBR)

By Ken Clark, About.com

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The Income Based Student Loan Repayment Formula (IBR Formula)

The required payment under the Income Based Repayment Program is surprisingly easy to calculate. For those who just want an estimate without doing the math, visit the Department of Education's IBR Calculator.

To calculate the required payment under the Income Based Repayment Program:

  • Look up the poverty level guidelines for your family from the Department of Health and Human Services website.
  • Multiply the appropriate poverty guideline by 150%.
  • Subtract your adjusted gross income from the number you calculated in the previous step.
  • Multiply your answer by 15%.
  • Divide this answer by 12.
  • This is your new monthly payment, unless it is greater than your original payment under the 10-year standard repayment plan. If this is the case, your payment remains the same.
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