Based on annual S&P 500 total returns and Nasdaq Composite price-index returns through 2025. Past performance does not guarantee future results. Sources: S&P Dow Jones Indices and Nasdaq historical data.
If you had invested in the S&P 500…
One of the most-searched money questions: what would $1,000 or $10,000 invested in the S&P 500 in some year be worth now? This uses approximate annual total returns (dividends reinvested) since 1971, side by side with the Nasdaq Composite, and deflates the result by CPI so you can see the gain in today's dollars.
How to use this calculator
Choose a start year and lump sum to measure a specific historical holding period through the end of 2025.
Compare nominal wealth with the CPI-adjusted result to separate investment growth from lost purchasing power.
Use several start years, especially before major drawdowns, rather than selecting only a favorable entry point.
How to read the result
The S&P 500 figure assumes dividends were reinvested; the Nasdaq comparison uses the commonly quoted price index. The annualized return summarizes the full holding period and does not describe the path taken to reach the ending value.
What this estimate does not capture
Historical index returns are not live quotes and do not include investor taxes, fund expenses or trading costs. An index cannot be purchased directly, and past performance does not set a future expected return.
Methodology, assumptions & limits
Inputs are applied directly to standard finance formulas with monthly compounding where relevant. Results are estimates in the selected currency; they do not include every tax, fee, benefit, market event or local rule. Try a conservative and an optimistic case before making a decision.
All math runs in your browser and your inputs are never sent to a server. Settings are saved locally and share links encode the state in the URL. For information only — not investment or tax advice.