Compound Interest Calculator

Visualize compound growth with recurring deposits, annual rate, and investment horizons.

Input Parameters

Initial Deposit / Starting Capital ($)

Monthly Recurring Contribution ($)

Expected Annual Interest Rate (%)

Investment Horizon (Years)

Future Projected Portfolio Balance (10 years)

$114,279

Total Principal Invested$70,000

Compound Growth Earned+$44,279

BalanceInvested

Capital vs Interest Earned Ratio61.3% Total Principal Invested · 38.7% Compound Growth Earned

175 available

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Compound interest grows money on money: returns are reinvested each period. Add monthly contributions, rate and horizon to project capital growth.

What is compounding?

Earnings themselves earn returns in later periods, creating exponential growth over long horizons.

Do monthly contributions matter?

Enormously — regular deposits often contribute more than the starting amount over decades.

Is the rate guaranteed?

No, it is an assumption for projection; real returns fluctuate and fees or taxes are not included.