In: Finance
A loan is being repaid by the amortization method with an installment at the end of each 80 quarters at 6% annual effective interest, the first payment one quarter after the loan is made. In which payment are the principal and the interest most nearly equal to each other?
ANS: 33 Please show the steps.
Effective Interest Rate = [(1+Interest Rate)^Number of times Compounded in a year]-1
0.06 = [(1+i)^4]-1
1.06^1/4 = 1+i
Therefore, Quarterly Interest = i = 1.01467-1 = 0.01467 = 1.467%
Lets Assume a loan of $100 is borrowed,
EMI = P*i*(1+i)^n/[{(1+i)^n}-1]
Where,
P = Principal = 100
i= Interest Rate = 0.01467
n= Number of periods = 80
Therefore, EMI = 100*0.01467*(1+0.01467)^80/[{(1+0.01467)^80}-1]
= 1.467*(3.20616)/[3.20616-1] = 4.70344/2.20616 = $2.131958
Amortization Schedule will be:
Period |
Opening Principal (previous closing) |
Interest (opening*0.01467) |
Installment |
Principal Repayment (installment-interest) |
Closing Principal (opening-principal repayment) |
1 | 100 | 1.467 | 2.131958 | 0.664958 | 99.335042 |
2 | 99.335042 | 1.457245066 | 2.131958 | 0.67471293 | 98.6603291 |
3 | 98.6603291 | 1.447347027 | 2.131958 | 0.68461097 | 97.9757181 |
4 | 97.9757181 | 1.437303784 | 2.131958 | 0.69465422 | 97.2810639 |
5 | 97.2810639 | 1.427113207 | 2.131958 | 0.70484479 | 96.5762191 |
6 | 96.5762191 | 1.416773134 | 2.131958 | 0.71518487 | 95.8610342 |
7 | 95.8610342 | 1.406281372 | 2.131958 | 0.72567663 | 95.1353576 |
8 | 95.1353576 | 1.395635696 | 2.131958 | 0.7363223 | 94.3990353 |
9 | 94.3990353 | 1.384833848 | 2.131958 | 0.74712415 | 93.6519111 |
10 | 93.6519111 | 1.373873536 | 2.131958 | 0.75808446 | 92.8938267 |
11 | 92.8938267 | 1.362752437 | 2.131958 | 0.76920556 | 92.1246211 |
12 | 92.1246211 | 1.351468192 | 2.131958 | 0.78048981 | 91.3441313 |
13 | 91.3441313 | 1.340018406 | 2.131958 | 0.79193959 | 90.5521917 |
14 | 90.5521917 | 1.328400652 | 2.131958 | 0.80355735 | 89.7486344 |
15 | 89.7486344 | 1.316612466 | 2.131958 | 0.81534553 | 88.9332888 |
16 | 88.9332888 | 1.304651347 | 2.131958 | 0.82730665 | 88.1059822 |
17 | 88.1059822 | 1.292514758 | 2.131958 | 0.83944324 | 87.2665389 |
18 | 87.2665389 | 1.280200126 | 2.131958 | 0.85175787 | 86.4147811 |
19 | 86.4147811 | 1.267704838 | 2.131958 | 0.86425316 | 85.5505279 |
20 | 85.5505279 | 1.255026244 | 2.131958 | 0.87693176 | 84.6735961 |
21 | 84.6735961 | 1.242161655 | 2.131958 | 0.88979634 | 83.7837998 |
22 | 83.7837998 | 1.229108343 | 2.131958 | 0.90284966 | 82.8809501 |
23 | 82.8809501 | 1.215863539 | 2.131958 | 0.91609446 | 81.9648557 |
24 | 81.9648557 | 1.202424433 | 2.131958 | 0.92953357 | 81.0353221 |
25 | 81.0353221 | 1.188788175 | 2.131958 | 0.94316982 | 80.0921523 |
26 | 80.0921523 | 1.174951874 | 2.131958 | 0.95700613 | 79.1351462 |
27 | 79.1351462 | 1.160912594 | 2.131958 | 0.97104541 | 78.1641008 |
28 | 78.1641008 | 1.146667358 | 2.131958 | 0.98529064 | 77.1788101 |
29 | 77.1788101 | 1.132213144 | 2.131958 | 0.99974486 | 76.1790653 |
30 | 76.1790653 | 1.117546887 | 2.131958 | 1.01441111 | 75.1646541 |
31 | 75.1646541 | 1.102665476 | 2.131958 | 1.02929252 | 74.1353616 |
32 | 74.1353616 | 1.087565755 | 2.131958 | 1.04439225 | 73.0909694 |
33 | 73.0909694 | 1.072244521 | 2.131958 | 1.05971348 | 72.0312559 |
34 | 72.0312559 | 1.056698524 | 2.131958 | 1.07525948 | 70.9559964 |
35 | 70.9559964 | 1.040924467 | 2.131958 | 1.09103353 | 69.8649629 |
36 | 69.8649629 | 1.024919006 | 2.131958 | 1.10703899 | 68.7579239 |
37 | 68.7579239 | 1.008678743 | 2.131958 | 1.12327926 | 67.6346446 |
38 | 67.6346446 | 0.992200237 | 2.131958 | 1.13975776 | 66.4948869 |
39 | 66.4948869 | 0.97547999 | 2.131958 | 1.15647801 | 65.3384089 |
40 | 65.3384089 | 0.958514458 | 2.131958 | 1.17344354 | 64.1649653 |
41 | 64.1649653 | 0.941300041 | 2.131958 | 1.19065796 | 62.9743074 |
42 | 62.9743074 | 0.923833089 | 2.131958 | 1.20812491 | 61.7661824 |
43 | 61.7661824 | 0.906109897 | 2.131958 | 1.2258481 | 60.5403343 |
44 | 60.5403343 | 0.888126705 | 2.131958 | 1.2438313 | 59.296503 |
45 | 59.296503 | 0.8698797 | 2.131958 | 1.2620783 | 58.0344247 |
46 | 58.0344247 | 0.851365011 | 2.131958 | 1.28059299 | 56.7538318 |
47 | 56.7538318 | 0.832578712 | 2.131958 | 1.29937929 | 55.4544525 |
48 | 55.4544525 | 0.813516818 | 2.131958 | 1.31844118 | 54.1360113 |
49 | 54.1360113 | 0.794175286 | 2.131958 | 1.33778271 | 52.7982286 |
50 | 52.7982286 | 0.774550013 | 2.131958 | 1.35740799 | 51.4408206 |
51 | 51.4408206 | 0.754636838 | 2.131958 | 1.37732116 | 50.0634994 |
52 | 50.0634994 | 0.734431537 | 2.131958 | 1.39752646 | 48.665973 |
53 | 48.665973 | 0.713929823 | 2.131958 | 1.41802818 | 47.2479448 |
54 | 47.2479448 | 0.69312735 | 2.131958 | 1.43883065 | 45.8091141 |
55 | 45.8091141 | 0.672019704 | 2.131958 | 1.4599383 | 44.3491758 |
56 | 44.3491758 | 0.65060241 | 2.131958 | 1.48135559 | 42.8678203 |
57 | 42.8678203 | 0.628870923 | 2.131958 | 1.50308708 | 41.3647332 |
58 | 41.3647332 | 0.606820636 | 2.131958 | 1.52513736 | 39.8395958 |
59 | 39.8395958 | 0.584446871 | 2.131958 | 1.54751113 | 38.2920847 |
60 | 38.2920847 | 0.561744882 | 2.131958 | 1.57021312 | 36.7218716 |
61 | 36.7218716 | 0.538709856 | 2.131958 | 1.59324814 | 35.1286234 |
62 | 35.1286234 | 0.515336906 | 2.131958 | 1.61662109 | 33.5120023 |
63 | 33.5120023 | 0.491621074 | 2.131958 | 1.64033693 | 31.8716654 |
64 | 31.8716654 | 0.467557331 | 2.131958 | 1.66440067 | 30.2072647 |
65 | 30.2072647 | 0.443140574 | 2.131958 | 1.68881743 | 28.5184473 |
66 | 28.5184473 | 0.418365622 | 2.131958 | 1.71359238 | 26.8048549 |
67 | 26.8048549 | 0.393227222 | 2.131958 | 1.73873078 | 25.0661241 |
68 | 25.0661241 | 0.367720041 | 2.131958 | 1.76423796 | 23.3018862 |
69 | 23.3018862 | 0.34183867 | 2.131958 | 1.79011933 | 21.5117669 |
70 | 21.5117669 | 0.31557762 | 2.131958 | 1.81638038 | 19.6953865 |
71 | 19.6953865 | 0.28893132 | 2.131958 | 1.84302668 | 17.8523598 |
72 | 17.8523598 | 0.261894118 | 2.131958 | 1.87006388 | 15.9822959 |
73 | 15.9822959 | 0.234460281 | 2.131958 | 1.89749772 | 14.0847982 |
74 | 14.0847982 | 0.20662399 | 2.131958 | 1.92533401 | 12.1594642 |
75 | 12.1594642 | 0.17837934 | 2.131958 | 1.95357866 | 10.2058855 |
76 | 10.2058855 | 0.149720341 | 2.131958 | 1.98223766 | 8.22364787 |
77 | 8.22364787 | 0.120640914 | 2.131958 | 2.01131709 | 6.21233078 |
78 | 6.21233078 | 0.091134893 | 2.131958 | 2.04082311 | 4.17150767 |
79 | 4.17150767 | 0.061196018 | 2.131958 | 2.07076198 | 2.10074569 |
80 | 2.10074569 | 0.030817939 | 2.13156363 | 2.10074569 | 0 |
It is clear from the Amortization Schedule that Interest and Principal Repayment is almost same in 33rd payment
Therefore, 33rd Payment