Compound Interest Calculator

Enter your initial investment, monthly contribution, annual return, and term to estimate future value with compounding. Switch between monthly and annual compounding to compare long-term investing outcomes more intuitively.

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Enter Investment Details

Results

Estimated Future Value -
Total Contribution -
Total Profit -

Enter values and calculate to see the compound-growth estimate.

Why Compounding Matters

Compounding means returns can generate additional returns over time. The longer the period, the larger the cumulative effect can become, so the same contribution amount can lead to very different outcomes depending on time and return rate.

Long-term consistency matters more than chasing short-term returns. Build your plan with realistic assumptions rather than aggressive projections.

Example Scenarios

KRW 300,000 per month for 10 years

A baseline scenario with KRW 300,000 invested every month for 10 years and no initial lump sum.

KRW 500,000 per month for 20 years

A long-term scenario designed to show how compounding can build retirement capital.

KRW 1,000,000 per month for 30 years

A long-horizon scenario for building assets over decades, where compounding has more time to work.

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FAQ

Common questions about the compound interest calculator.