When Repayment Begins :

Stafford Loans (subsidized and unsubsidized)
Your Stafford Loans will have a grace period of six
months before you enter repayment. This grace period
begins the day after you stop attending school at least
half-time.
Each loan has only one six-month grace period. If you
took some time off from school, you may have already
used the grace period on some of your Stafford Loans,
so you may go directly into repayment on those loans as soon as you leave school.
Your loan holder will advise you of your first payment
due date while you are in your grace period.