Compound Interest Calculator
Forecast your wealth growth with monthly contributions and compounding returns
Investment Parameters
$
$
1 yr10 yrs25 yrs50 yrs
Total Invested
$65,000.00
Total Interest
$51,811.22
Final Balance
$116,811.22
Total Principal InvestedTotal Balance (With Interest)
Year-by-Year Amortization Schedule
| Year | Interest (Year) | Total Interest | Total Invested | End Balance |
|---|---|---|---|---|
| 1 | +$858.71 | $858.71 | $11,000.00 | $11,858.71 |
| 2 | +$1,576.90 | $2,435.61 | $17,000.00 | $19,435.61 |
| 3 | +$2,370.30 | $4,805.91 | $23,000.00 | $27,805.91 |
| 4 | +$3,246.78 | $8,052.69 | $29,000.00 | $37,052.69 |
| 5 | +$4,215.04 | $12,267.74 | $35,000.00 | $47,267.74 |
| 6 | +$5,284.69 | $17,552.43 | $41,000.00 | $58,552.43 |
| 7 | +$6,466.34 | $24,018.77 | $47,000.00 | $71,018.77 |
| 8 | +$7,771.73 | $31,790.50 | $53,000.00 | $84,790.50 |
| 9 | +$9,213.81 | $41,004.32 | $59,000.00 | $100,004.32 |
| 10 | +$10,806.90 | $51,811.22 | $65,000.00 | $116,811.22 |
How Compound Interest Works
Compound interest is interest earned not only on your initial principal amount but also on accumulated interest from previous periods. Over long periods, compounding causes exponential portfolio growth.
What is the compound interest formula?
A = P(1 + r/n)^(nt), where A is final balance, P is the principal investment, r is the annual interest rate, n is the number of compounding times per year, and t is time in years.
Why do regular monthly contributions matter?
Dollar-cost averaging and recurring monthly deposits significantly boost the compounding base, compounding into substantial wealth over 10-30 years.