Brian Dunning's FileMaker Custom Functions

LoanAmortTable ( OpeningBalance ; PmtPerTerm ; Terms ; Rate ; PmtAdv ; StartTermNo ; ColumnSeperator )

Amortization table

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Lee Dolereit   Lee Dolereit
Sofco
http://www.sofco.com.au

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  Sample input:
LoanAmortTable ( 10000; 229; 60; 13.7975/100/12; 1; 0; " ")
  Sample output:
0 $ 10,000.00 $ 229.00 $ 229.00 $ 0.00 $ 9,771.00
1 $ 9,771.00 $ 229.00 $ 116.65 $ 112.35 $ 9,654.35
2 $ 9,654.35 $ 229.00 $ 118.00 $ 111.00 $ 9,536.35
3 $ 9,536.35 $ 229.00 $ 119.35 $ 109.65 $ 9,417.00
4 $ 9,417.00 $ 229.00 $ 120.72 $ 108.28 $ 9,296.28
5 $ 9,296.28 $ 229.00 $ 122.11 $ 106.89 $ 9,174.17
6 $ 9,174.17 $ 229.00 $ 123.52 $ 105.48 $ 9,050.65
7 $ 9,050.65 $ 229.00 $ 124.94 $ 104.06 $ 8,925.71
8 $ 8,925.71 $ 229.00 $ 126.37 $ 102.63 $ 8,799.34
9 $ 8,799.34 $ 229.00 $ 127.83 $ 101.17 $ 8,671.51
10 $ 8,671.51 $ 229.00 $ 129.30 $ 99.70 $ 8,542.21
11 $ 8,542.21 $ 229.00 $ 130.78 $ 98.22 $ 8,411.43
12 $ 8,411.43 $ 229.00 $ 132.29 $ 96.71 $ 8,279.14
13 $ 8,279.14 $ 229.00 $ 133.81 $ 95.19 $ 8,145.33
14 $ 8,145.33 $ 229.00 $ 135.35 $ 93.65 $ 8,009.98
15 $ 8,009.98 $ 229.00 $ 136.90 $ 92.10 $ 7,873.08
16 $ 7,873.08 $ 229.00 $ 138.48 $ 90.52 $ 7,734.60
17 $ 7,734.60 $ 229.00 $ 140.07 $ 88.93 $ 7,594.53
18 $ 7,594.53 $ 229.00 $ 141.68 $ 87.32 $ 7,452.85
19 $ 7,452.85 $ 229.00 $ 143.31 $ 85.69 $ 7,309.54
20 $ 7,309.54 $ 229.00 $ 144.96 $ 84.04 $ 7,164.58
21 $ 7,164.58 $ 229.00 $ 146.62 $ 82.38 $ 7,017.96
22 $ 7,017.96 $ 229.00 $ 148.31 $ 80.69 $ 6,869.65
23 $ 6,869.65 $ 229.00 $ 150.01 $ 78.99 $ 6,719.64
24 $ 6,719.64 $ 229.00 $ 151.74 $ 77.26 $ 6,567.90
25 $ 6,567.90 $ 229.00 $ 153.48 $ 75.52 $ 6,414.42
26 $ 6,414.42 $ 229.00 $ 155.25 $ 73.75 $ 6,259.17
27 $ 6,259.17 $ 229.00 $ 157.03 $ 71.97 $ 6,102.14
28 $ 6,102.14 $ 229.00 $ 158.84 $ 70.16 $ 5,943.30
29 $ 5,943.30 $ 229.00 $ 160.66 $ 68.34 $ 5,782.64
30 $ 5,782.64 $ 229.00 $ 162.51 $ 66.49 $ 5,620.13
31 $ 5,620.13 $ 229.00 $ 164.38 $ 64.62 $ 5,455.75
32 $ 5,455.75 $ 229.00 $ 166.27 $ 62.73 $ 5,289.48
33 $ 5,289.48 $ 229.00 $ 168.18 $ 60.82 $ 5,121.30
34 $ 5,121.30 $ 229.00 $ 170.12 $ 58.88 $ 4,951.18
35 $ 4,951.18 $ 229.00 $ 172.07 $ 56.93 $ 4,779.11
36 $ 4,779.11 $ 229.00 $ 174.05 $ 54.95 $ 4,605.06
37 $ 4,605.06 $ 229.00 $ 176.05 $ 52.95 $ 4,429.01
38 $ 4,429.01 $ 229.00 $ 178.08 $ 50.92 $ 4,250.93
39 $ 4,250.93 $ 229.00 $ 180.12 $ 48.88 $ 4,070.81
40 $ 4,070.81 $ 229.00 $ 182.19 $ 46.81 $ 3,888.62
41 $ 3,888.62 $ 229.00 $ 184.29 $ 44.71 $ 3,704.33
42 $ 3,704.33 $ 229.00 $ 186.41 $ 42.59 $ 3,517.92
43 $ 3,517.92 $ 229.00 $ 188.55 $ 40.45 $ 3,329.37
44 $ 3,329.37 $ 229.00 $ 190.72 $ 38.28 $ 3,138.65
45 $ 3,138.65 $ 229.00 $ 192.91 $ 36.09 $ 2,945.74
46 $ 2,945.74 $ 229.00 $ 195.13 $ 33.87 $ 2,750.61
47 $ 2,750.61 $ 229.00 $ 197.37 $ 31.63 $ 2,553.24
48 $ 2,553.24 $ 229.00 $ 199.64 $ 29.36 $ 2,353.60
49 $ 2,353.60 $ 229.00 $ 201.94 $ 27.06 $ 2,151.66
50 $ 2,151.66 $ 229.00 $ 204.26 $ 24.74 $ 1,947.40
51 $ 1,947.40 $ 229.00 $ 206.61 $ 22.39 $ 1,740.79
52 $ 1,740.79 $ 229.00 $ 208.98 $ 20.02 $ 1,531.81
53 $ 1,531.81 $ 229.00 $ 211.39 $ 17.61 $ 1,320.42
54 $ 1,320.42 $ 229.00 $ 213.82 $ 15.18 $ 1,106.60
55 $ 1,106.60 $ 229.00 $ 216.28 $ 12.72 $ 890.32
56 $ 890.32 $ 229.00 $ 218.76 $ 10.24 $ 671.56
57 $ 671.56 $ 229.00 $ 221.28 $ 7.72 $ 450.28
58 $ 450.28 $ 229.00 $ 223.82 $ 5.18 $ 226.46
59 $ 226.46 $ 229.06 $ 226.46 $ 2.60 $ 0.00

  Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

This recursive function will output a full amortization table and correctly calculate the first payment allocation if the loan is geared as a 'payment in advance' loan. The output column seperator can be any string you like, but for most purposes, a tab character makes it most human 'readable'. Also if using a tab character, the output can be copied and pasted directly into an Excel spreadsheet.

 

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