formula for EMI(monthly installment)= [P*R*(1+R)^N]/[(1+R)^N-1]
where P=Principal, R=Rate of interest per month, N=number of installment monthly.
EMI under original mortgage is as under:
House cost | 154000 | ||||
Less: | down payment | -7700 | after 5 years | ||
Loan Amount | 146300 | balance principal | 134814.7 | ||
Loan Duration | 30 years | Interest paid in first 5 years | 36720.5 | ||
interest | 5.25% | interest to be paid in next 5 years | 107814.2 | ||
EMI | 807.87 | ||||
Principal | 146300 | ||||
interest | 144534.65 | ||||
Total | 290834.65 |
Answer to Q1: Monthly payment under each option a, b and C
EMI= [P*R*(1+R)^N]/[(1+R)^N-1]
where P=Principal, R=Rate of interest per month, N=number of installment monthly.
Option A | Option B | Option C | ||
principal | 134815 | 134815 | 134815 | |
interest | 3.75% | 3.50% | 3.25% | |
loan duration | 30 | 30 | 30 | |
EMI | 624 | 605 | 587 | |
Interest Total | 89,951 | 83,122 | 76,405 | |
Out of pocket Cost | 1,800 | 3,000 | 4,000 | |
Total Cost | 91,751 | 86,122 | 80,405 |
Ans to Q2. Yes refinancing should be done as total future interest payment will reduce despite increase in duration under all three new options.
Ans to Q3. Option C is best and should be selected as it has lowest total cost (interest + out of pocket cost) which is coming to 80,405
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