The Loan will have a lower balance by 70.47 at the time of repayment.
How to Identify the best loan offer?
To determine which loan will have a lower balance at the time of repayment, we need to calculate the total amount of interest that will be accrued on each loan.
1) For the unsubsidized Stafford loan:
The loan amount is $3,725.
The annual interest rate is 4.65%, compounded monthly. This means the monthly interest rate is 4.65%/12 = 0.3875%.
The loan will be repaid in 6 months, so there will be 6 monthly compounding periods.
Using the formula for compound interest, the balance of the loan at the time of repayment will be:
balance = principal x (1 + monthly interest rate)^number of compounding periods
balance =

balance = 3,901.95
So the balance of the unsubsidized Stafford loan at the time of repayment will be 3,901.95.
2) For the PLUS loan:
The loan amount is 3,725.
The annual interest rate is 5.65%, compounded monthly. This means the monthly interest rate is 5.65%/12 = 0.4708%.
The loan will be deferred until graduation, which is in 6 months, so there will be 6 monthly compounding periods.
Using the formula for compound interest, the balance of the loan at the time of repayment will be:
balance = principal x (1 + monthly interest rate)^number of compounding periods
balance =

balance = 3831.47
So the balance of the PLUS loan at the time of repayment will be 3831.47
Difference in balance = 3,901.95 - 3831.47
= 70.47
Therefore, the PLUS loan will have a lower balance at the time of repayment, by an amount of 70.47