In: Accounting
You take out a 25 year, $275, 000 mortgage with constant payments at the end of each month and i (12) = 6%. After 15 years, you wish to refinance the mortgage with a 10 year mortgage (also with constant payments at the end of each month) so that you pay $100 less each month than you originally were paying. Find the monthly nominal interest rate corresponding to this new mortgage
Answer :
Loan present value (PV) = $275,000
Interest rate = 6% for first 15 years, compounded monthly = 6/12 = 0.50%
Loan period [NPER] = 25 years, Monthly = 25*12 = 300
Refinance the mortgage with a 10 year mortgage, so that you pay $100 less each month
To find the monthly nominal interest rate corresponding to this new mortgage we have to use PMT, PV and RATE function in excel
PV | -275,000 |
NPER | 300 |
Monthly interest rate | 0.50% |
Monthly payment | $1,771.83 |
Remaining NPER | 120 |
PV | $159,594.74 |
Monthly payment | $1,671.83 |
Monthly interest rate | 0.3942% |
Therefore monthly nominal interest rate corresponding to this new mortgage will be approximately 0.39%
Working
- | A | B |
1 | PV | -275000 |
2 | NPER | =25*12 |
3 | Monthly interest rate | =6%/12 |
4 | Montly payment | =PMT(B3,B2,B1,0) |
5 | - | - |
6 | Remaining NPER | =10*12 |
7 | PV | =PV(B3,B6,-B4,0) |
8 | Monthly payment | =B4-100 |
9 | Montly interest rate | =RATE(B6,-B8,B7,0) |