The basic answer to when student loans start accruing interest is right away. Whether you have to start paying that interest immediately depends upon whether it is a federal or private student loan, as each one’s interest rules can differ.
Interest on Federal Direct Student Loans and Parent PLUS Loans
Even though Federal Direct Student loans do not need to start to be paid back until six months after you leave college, interest starts to accrue on these loans as soon as you take them out. The interest starts to accrue at the interest rate in effect on the date when you take the loan. The interest rate changes every year as set by Congress for new loans that a student or parent takes out. If you have a subsidized federal loan, the federal government covers all the accrued interest costs. With federal student loans, you don’t need to pay the interest right away. You can defer interest payments along with your loan payments until six months after you leave school.