In: Finance
Mortgage Payment
You currently have a 30-year fixed rate mortgage with an annual interest rate of 6%. You have had the mortgage 4 years, and on September 1, 2015 you made your 48th payment. The original principal amount was $280,000 and you monthly payment, without taxes and insurance, are $1,678.74 per month, computed using the Excel function =PMT(0.5%,360,280000,0,0).
Starting with your original mortgage your banker calls and says that you could refinance your existing mortgage (6% rate, 30-year original term) into a 15-year mortgage at 3.2%. Assume you will refinance the current principal (the current remaining loan balance).
QUESTION:
What would the payments be with the 15-year mortgage?
Compare the total interest paid over the life of both loans: the 30-year loan and the new 15-year loan.
| period | 360 | ||||||||
| Interest rate per month | 0.50% | ||||||||
| Principle amount | 280000 | ||||||||
| Monthly intesest | ($1,678.74) | ||||||||
| Computation of outstanding balance after 48 month | |||||||||
| month | Loan outstanding at beginning | interest on outstanding balance | Monthly instalment paid | Loan outstanding at the end | |||||
| 0 | 280,000.0 | 1,400.0 | (1,678.7) | 279,721.3 | |||||
| 1 | 279,721.3 | 1,398.6 | (1,678.7) | 279,441.1 | |||||
| 2 | 279,441.1 | 1,397.2 | (1,678.7) | 279,159.6 | |||||
| 3 | 279,159.6 | 1,395.8 | (1,678.7) | 278,876.6 | |||||
| 4 | 278,876.6 | 1,394.4 | (1,678.7) | 278,592.3 | |||||
| 5 | 278,592.3 | 1,393.0 | (1,678.7) | 278,306.5 | |||||
| 6 | 278,306.5 | 1,391.5 | (1,678.7) | 278,019.3 | |||||
| 7 | 278,019.3 | 1,390.1 | (1,678.7) | 277,730.7 | |||||
| 8 | 277,730.7 | 1,388.7 | (1,678.7) | 277,440.6 | |||||
| 9 | 277,440.6 | 1,387.2 | (1,678.7) | 277,149.0 | |||||
| 10 | 277,149.0 | 1,385.7 | (1,678.7) | 276,856.0 | |||||
| 11 | 276,856.0 | 1,384.3 | (1,678.7) | 276,561.6 | |||||
| 12 | 276,561.6 | 1,382.8 | (1,678.7) | 276,265.6 | |||||
| 13 | 276,265.6 | 1,381.3 | (1,678.7) | 275,968.2 | |||||
| 14 | 275,968.2 | 1,379.8 | (1,678.7) | 275,669.3 | |||||
| 15 | 275,669.3 | 1,378.3 | (1,678.7) | 275,368.9 | |||||
| 16 | 275,368.9 | 1,376.8 | (1,678.7) | 275,067.0 | |||||
| 17 | 275,067.0 | 1,375.3 | (1,678.7) | 274,763.6 | |||||
| 18 | 274,763.6 | 1,373.8 | (1,678.7) | 274,458.7 | |||||
| 19 | 274,458.7 | 1,372.3 | (1,678.7) | 274,152.3 | |||||
| 20 | 274,152.3 | 1,370.8 | (1,678.7) | 273,844.3 | |||||
| 21 | 273,844.3 | 1,369.2 | (1,678.7) | 273,534.8 | |||||
| 22 | 273,534.8 | 1,367.7 | (1,678.7) | 273,223.7 | |||||
| 23 | 273,223.7 | 1,366.1 | (1,678.7) | 272,911.1 | |||||
| 24 | 272,911.1 | 1,364.6 | (1,678.7) | 272,596.9 | |||||
| 25 | 272,596.9 | 1,363.0 | (1,678.7) | 272,281.1 | |||||
| 26 | 272,281.1 | 1,361.4 | (1,678.7) | 271,963.8 | |||||
| 27 | 271,963.8 | 1,359.8 | (1,678.7) | 271,644.9 | |||||
| 28 | 271,644.9 | 1,358.2 | (1,678.7) | 271,324.3 | |||||
| 29 | 271,324.3 | 1,356.6 | (1,678.7) | 271,002.2 | |||||
| 30 | 271,002.2 | 1,355.0 | (1,678.7) | 270,678.5 | |||||
| 31 | 270,678.5 | 1,353.4 | (1,678.7) | 270,353.1 | |||||
| 32 | 270,353.1 | 1,351.8 | (1,678.7) | 270,026.2 | |||||
| 33 | 270,026.2 | 1,350.1 | (1,678.7) | 269,697.6 | |||||
| 34 | 269,697.6 | 1,348.5 | (1,678.7) | 269,367.3 | |||||
| 35 | 269,367.3 | 1,346.8 | (1,678.7) | 269,035.4 | |||||
| 36 | 269,035.4 | 1,345.2 | (1,678.7) | 268,701.8 | |||||
| 37 | 268,701.8 | 1,343.5 | (1,678.7) | 268,366.6 | |||||
| 38 | 268,366.6 | 1,341.8 | (1,678.7) | 268,029.7 | |||||
| 39 | 268,029.7 | 1,340.1 | (1,678.7) | 267,691.1 | |||||
| 40 | 267,691.1 | 1,338.5 | (1,678.7) | 267,350.8 | |||||
| 41 | 267,350.8 | 1,336.8 | (1,678.7) | 267,008.8 | |||||
| 42 | 267,008.8 | 1,335.0 | (1,678.7) | 266,665.1 | |||||
| 43 | 266,665.1 | 1,333.3 | (1,678.7) | 266,319.7 | |||||
| 44 | 266,319.7 | 1,331.6 | (1,678.7) | 265,972.6 | |||||
| 45 | 265,972.6 | 1,329.9 | (1,678.7) | 265,623.7 | |||||
| 46 | 265,623.7 | 1,328.1 | (1,678.7) | 265,273.1 | |||||
| 47 | 265,273.1 | 1,326.4 | (1,678.7) | 264,920.7 | |||||
| 48 | 264,920.7 | 1,324.6 | (1,678.7) | 264,566.6 | |||||
| 66,824.9 | |||||||||
| Outstanding loan balance = 264,566.6 | |||||||||
| Payment with 15 year loan @ 3.2% interest can be calculated as below | |||||||||
| Period = 15*12 | 180 | ||||||||
| Monthly interest rate =3.2%/12 | 0.2667% | ||||||||
| Outstanding loan | 264567 | ||||||||
| Payment = | =PMT(0.2667%,180,264567,0,0) | ||||||||
| Hence payment = | ($1,852.60) | ||||||||
| Interest paid | |||||||||
| Interest paid on 30 year loan closed after 4 year = | 66,824.9 | ||||||||
| Interest paid on 15 year loan | |||||||||
| we can use FV formula in excel to compute FV of the annuity 1852.6 for 15 year paid monthly @ 0.2667% per month | |||||||||
| Future value of loan | =FV(0.2667%,180,-1852.6,0,0) | ||||||||
| Future value of loan | 427,299 | ||||||||
| Less Principle amount | 264567 | ||||||||
| interest paid on 15 year loan | 162,732 | ||||||||