Derrick wants to buy a new house that costs 100,000, he plans to finance it with monthly payments over 9 years.
Interest: 6% (annual)
What will be the monthly interest payment be once the first month has been paid?
PV = 100,000
n = 9 * 12 = 108
r = 6%/12 = 0.005
First, we will find the monthly payment
The monthly interest payment once the first payment is made = Loan outstanding after the first payment * monthly interest rate
Loan outstanding = PV with n = 107 payments remaining
Loan outstanding after the first payment = 99,299.4250341117
Monthly interest payment = 99,299.4250341117 * 0.005
Monthly interest payment = $496.4971251706
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