Compound Interest Calculator

Quickly see how your savings or investments can multiply over time with the power of compounding. Simply enter your principal, rate, time and contributions to get accurate projections in seconds. Perfect for planning retirement, investments, or long-term savings goals.

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Basic Inputs
Enter nominal APR or APY based on selection.

Contributions
Beginning adds contributions before interest each period.
Advanced Options (click to expand)
Applied annually on that year’s interest.
Used to show “real” balances.
Increases the regular contribution every year.

Results

Final Balance (Nominal): $54,713.58
Total Contributions: $24,000.00
Interest (Pre-Tax): $20,713.58
Taxes Paid: $0.00
Net Gain (After Tax): $20,713.58

EAR (effective annual rate): 7.2290% • Steps/year: 12 • Contribution timing: End
Yearly Breakdown
Year Start ($) Contrib ($) Interest ($) Tax ($) End (Nominal $)
1 10,000.00 2,400.00 801.42 0.00 13,201.42
2 13,201.42 2,400.00 1,032.85 0.00 16,634.27
3 16,634.27 2,400.00 1,281.01 0.00 20,315.28
4 20,315.28 2,400.00 1,547.11 0.00 24,262.39
5 24,262.39 2,400.00 1,832.45 0.00 28,494.83
6 28,494.83 2,400.00 2,138.41 0.00 33,033.24
7 33,033.24 2,400.00 2,466.49 0.00 37,899.74
8 37,899.74 2,400.00 2,818.29 0.00 43,118.03
9 43,118.03 2,400.00 3,195.52 0.00 48,713.55
10 48,713.55 2,400.00 3,600.02 0.00 54,713.58
Totals 10,000.00 24,000.00 20,713.58 0.00 54,713.58
Taxes (if any) are applied at each year’s end on that year’s interest. “Real” values discount by inflation.
Notes: This tool converts your selected rate and compounding into an effective annual rate (EAR), then simulates at a fine step to handle mixed frequencies. Contributions can grow each year by the chosen percentage. Results are for illustration only.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.