Once a Loan is Fully Disbursed and During Repayment Status
Subsidized loans are the exception: While the student is in school half time or more, interest does not accrue on subsidized loans. Once the student falls below half time status after their grace period ends, interest begins accruing on subsidized loans.
Unsubsidized loans begin accruing interest once the amount is sent to the school regardless of enrollment status.
On Income-Driven Repayment (IDR) Plans
Unpaid interest still accrues when you’re repaying your loans under an IDR plan. Under IDR plans, your monthly loan payment can sometimes be less than the amount of interest that accrues between your payments. In this case, your payment won’t cover all of your interest, so an amount of unpaid interest will add up each month. This unpaid interest will still be your responsibility to pay unless your loan is forgiven under IDR Forgiveness.
During Forbearance
You are not required to make monthly payments during periods of forbearance. Interest continues to accrue during periods of forbearance. Payments made during forbearance do not affect the forbearance status, but will help pay down the interest that accrues while in forbearance.
During Deferment for Unsubsidized Loans
You are not required to make monthly payments during periods of deferment. However, interest continues to accrue on unsubsidized loans during periods of deferment. Payments made during deferment do not affect the deferment status, but will help pay down the interest that accrues while in deferment.
During School and Grace Periods for Unsubsidized Loans
You’re not required to make monthly payments while you’re in school at least half-time or during your grace period. However, interest continues to accrue while you're in school and during the grace period for unsubsidized loans. This includes Parent PLUS and Grad PLUS loans. Payments made during grace period and in school status do not affect the grace or in school status, but will help pay down the accrued interest while in school and grace.
Between payments
The amount of interest accrual varies with the number of days that elapse between payments. Daily Interest Accrual x Number of Days Since Last Payment = Monthly Interest Accrual.