What is the interest rate on an unsubsidized loan?

What is the interest rate on an unsubsidized loan?

Unsubsidized loans have the same variable interest rate as subsidized loans. Your rate of interest will never exceed 8.25%. The actual interest rate for your loan is adjusted each year on July 1 and is calculated according to a federal formula. You will be notified as the interest rate changes throughout the life of the loan.

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Am I charged interest on this loan while going to school?