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There's an urban legend that Albert Einstein once said compounding [interest] is the most powerful force in the universe. Whether or not he really said it, that line holds a lot of truth. I strongly suggest you pay attention to it.



Complete the following to calculate the compound interest.

Note you can also use it to see how monthly withdrawals affect your investment by entering a negative monthly deposit .



Initial deposit 
Additional monthly deposits 
Investment yield (interest rate)  % per year
Number of years 
Incorporate inflation at   % per year
 
YearAnnual depositsTotal depositsAnnual interestTotal interestBalanceBalance in today's money
1 R44 476,31 R44 476,31 R3 997,33 R3 997,33 R48 473,64 R45 729,85
2 R47 144,89 R91 621,20 R12 474,31 R16 471,64 R108 092,84 R96 202,24
3 R49 973,58 R141 594,79 R22 863,60 R39 335,23 R180 930,02 R151 912,34
4 R52 972,00 R194 566,79 R35 515,19 R74 850,42 R269 417,21 R213 403,66
5 R56 150,32 R250 717,11 R50 843,43 R125 693,86 R376 410,96 R281 276,17
6 R59 519,34 R310 236,45 R69 334,92 R195 028,78 R505 265,23 R356 192,05
7 R63 090,50 R373 326,95 R91 560,85 R286 589,63 R659 916,58 R438 882,21
8 R66 875,93 R440 202,88 R118 191,53 R404 781,16 R844 984,03 R530 153,44
9 R70 888,49 R511 091,36 R150 013,34 R554 794,49 R1 065 885,86 R630 896,20
10 R75 141,79 R586 233,16 R187 948,61 R742 743,10 R1 328 976,26 R742 093,40
11 R79 650,30 R665 883,46 R233 078,86 R975 821,96 R1 641 705,42 R864 829,94
12 R84 429,32 R750 312,78 R286 671,99 R1 262 493,95 R2 012 806,73 R1 000 303,28
13 R89 495,08 R839 807,86 R350 214,14 R1 612 708,09 R2 452 515,95 R1 149 835,18
14 R94 864,78 R934 672,64 R425 446,92 R2 038 155,01 R2 972 827,65 R1 314 884,54
15 R100 556,67 R1 035 229,31 R514 411,07 R2 552 566,08 R3 587 795,39 R1 497 061,66
16 R106 590,07 R1 141 819,39 R619 497,40 R3 172 063,48 R4 313 882,86 R1 698 143,96
17 R112 985,48 R1 254 804,86 R743 506,60 R3 915 570,08 R5 170 374,95 R1 920 093,29
18 R119 764,60 R1 374 569,47 R889 719,05 R4 805 289,13 R6 179 858,60 R2 165 075,09
19 R126 950,48 R1 501 519,95 R1 061 976,59 R5 867 265,72 R7 368 785,67 R2 435 479,54
20 R134 567,51 R1 636 087,46 R1 264 778,23 R7 132 043,95 R8 768 131,41 R2 733 944,82
 
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