Question

In: Finance

Consider a 20-year, $115,000 mortgage with a rate of 5.55 percent. Eight years into the mortgage,...

Consider a 20-year, $115,000 mortgage with a rate of 5.55 percent. Eight years into the mortgage, rates have fallen to 5 percent. What would be the monthly saving to a homeowner from refinancing the outstanding mortgage balance at the lower rate? (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Solutions

Expert Solution

Step-1:Calculation of existing monthly payment
Monthly payment = Loan amount / Present value of annuity of 1
= $ 1,15,000.00 / 144.7776
= $           794.32
Working;
Present value of annuity of 1 = (1-(1+i)^-n)/i Where,
= 144.7776479 i = 5.55%/12 = 0.004625
n = 20*12 = 240
Step-2:Calculation of loan balance after 8 years
Loan balance = Monthly payment * Present value of annuity of 1
= $           794.32 * 104.9624
= $     83,373.89
Working;
Present value of annuity of 1 = (1-(1+i)^-n)/i Where,
= 104.9623914 i = 5.55%/12 = 0.004625
n = 12*12 = 144
Step-3:Calculation of revised monthly payment
Monthly payment = Loan amount / Present value of annuity of 1
= $     83,373.89 / 108.1209
= $           771.12
Working;
Present value of annuity of 1 = (1-(1+i)^-n)/i Where,
= 108.1209174 i = 5%/12 = 0.004167
n = 12*12 = 144
Step-4:Calculation of monthly saving
Monthly payment prior to rate change $           794.32
Monthly payment after rate change $           771.12
Monthly saving $             23.20

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