Simple Investment Growth Calculator

See how your investments can grow over time with compound interest.

Compare different contribution strategies and return scenarios.

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How much you have to invest today

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How much you'll add each month

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Set your own expected return

years

How long you'll let it compound

Sources & References

S&P 500 Historical Returns

• Average annual return (1926-2024): ~10% nominal, ~7% inflation-adjusted
• Standard deviation: ~20% (indicating significant year-to-year volatility)

Dividend Yields

• S&P 500 average dividend yield: 1.5-2.0% (as of 2024-2025)
• Historical dividend growth rate: ~5.9% annually (1960-2024)

Bond Returns

• 10-Year Treasury bonds: ~5% average annual return (1926-2024)
• Corporate bonds (investment grade): ~6% average annual return

Inflation Rate

• Long-term average: ~3% annually (1926-2024)
• Recent (2020-2024): 2-8% range with 2022 peak at 8%

Important

Past performance does not guarantee future results. Market returns vary significantly year-to-year. These are long-term historical averages.

⚠️ Important