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Stock Market Return Calculator

Calculate potential stock market returns on your investment. See how your money grows with lump sum and regular monthly investing.

The stock market has historically returned 8-12% annually over long periods (S&P 500 average: ~10%). This calculator helps you estimate how your investment grows with both a lump sum and regular monthly contributions through the power of compounding.

Tips for Stock Market Return

1

The S&P 500 has averaged ~10% annual returns over the past century, but individual years vary widely (-37% to +52%)

2

Dollar-cost averaging (investing fixed amounts monthly) reduces the risk of bad timing

3

Historically, staying invested for 15+ years has never resulted in a loss in the S&P 500

Frequently Asked Questions

What is a realistic stock market return to expect?
Historically, the S&P 500 has returned about 10% per year before inflation (7% after inflation). For conservative planning, use 7-8%. Individual stock returns vary wildly — diversified index funds are the safest way to capture market returns.
Is it better to invest a lump sum or monthly?
Statistically, lump sum investing wins about 2/3 of the time because markets trend upward. However, dollar-cost averaging (monthly investing) reduces risk and is psychologically easier. If you receive regular income, monthly investing is the practical choice.
Last updated: April 2026

Data sources: Standard mathematical formulas

For informational purposes only. Not financial, medical, or legal advice. Always consult a qualified professional for decisions affecting your finances or health.

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