Week - A consecutive seven-day period in which: for an educational program using a semester, trimester, or quarter system or an educational program using clock hours, at least one day of regularly scheduled instruction, examinations, or preparation for examinations occurs for an educational program using credit hours but not using a semester, trimester, or quarter system, at least 12 hours of regularly scheduled instruction, examinations, or preparation for examinations occur.

Weighted Average Cohort Rate - For a school that has former students entering repayment in a fiscal year on both FFELP and FDLP loans, the Department of Education calculates a weighted average cohort rate.

Weighted Average Interest Rate - The method for calculating the interest rate for a Consolidation Loan.

Windfall Profits - Rebate of excess interest for Stafford loans first disbursed before July 1, 1992, or first disbursed to a new borrower on or after July 23, 1992, and before October 1, 1992, as required by the Technical Amendments of 1993. If a loan's fixed interest rate exceeds the current average of bond equivalent rates of 91-day Treasury bills plus a factor (3.25% or 3.10%) for a particular quarter, the lender must calculate an adjustment to excess interest and rebate the difference to the borrower's account based on a federally proscribed formula.

Withdrawal Date - The date the student withdraws, as determined by the school.

Write-Off - A loan amount for which there has been a total cessation of collection activity.