Compound Interest Calculator

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Project how a deposit grows with compound interest and optional monthly contributions — final balance, total interest, and a year-by-year breakdown.

%
Optional. Added at the end of each month, after that month's interest is applied.

Result

Final balance
31,998.32
Total contributions
12,000.00
Total interest earned
9,998.32
Effective annual yield
5.12%
APY at your compounding frequency

Yearly summary

YearContributionsInterest earnedEnding balance
11,200.00539.5011,739.50
21,200.00628.5013,568.01
31,200.00722.0515,490.06
41,200.00820.3917,510.44
51,200.00923.7519,634.20
61,200.001,032.4121,866.60
71,200.001,146.6224,213.23
81,200.001,266.6826,679.91
91,200.001,392.8829,272.79
101,200.001,525.5431,998.32

MonthStarting balanceInterest earnedContributionEnding balance
110,000.0041.67100.0010,141.67
210,141.6742.26100.0010,283.92
310,283.9242.85100.0010,426.77
410,426.7743.44100.0010,570.22
510,570.2244.04100.0010,714.26
610,714.2644.64100.0010,858.90
710,858.9045.25100.0011,004.15
811,004.1545.85100.0011,150.00
911,150.0046.46100.0011,296.46
1011,296.4647.07100.0011,443.53
1111,443.5347.68100.0011,591.21
1211,591.2148.30100.0011,739.50
1311,739.5048.91100.0011,888.42
1411,888.4249.54100.0012,037.95
1512,037.9550.16100.0012,188.11
1612,188.1150.78100.0012,338.90
1712,338.9051.41100.0012,490.31
1812,490.3152.04100.0012,642.35
1912,642.3552.68100.0012,795.03
2012,795.0353.31100.0012,948.34
2112,948.3453.95100.0013,102.29
2213,102.2954.59100.0013,256.88
2313,256.8855.24100.0013,412.12
2413,412.1255.88100.0013,568.01
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