Compound Interest Calculator — With Monthly Contributions
Calculate the future value of a lump sum plus monthly contributions with compound interest, and chart growth year by year.
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How to use
- Enter the initial amount, monthly contribution and annual return.
- Set the years and compounding frequency.
- Review the future value, gains and yearly table.
Example and rules
Example: 10,000 initial, 1,000 per month, 6% compounded monthly for 10 years grows to about 182,073.
- Contributions are added at month end; the rate is converted from the chosen compounding frequency.
- Returns are assumptions, not predictions for any product.
- Taxes, inflation and fees are not included.
Frequently asked questions
What is compounding?
Returns earn further returns, which grows over time.
What is the rule of 72?
Divide 72 by the annual rate to estimate years to double.
Is this investment advice?
No. It only performs the math.