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S&P 500 Return Calculator
See how an investment in the S&P 500 would have grown between any two years since 1928. Toggle dividend reinvestment, add yearly contributions and compare nominal and inflation-adjusted results, all from built-in annual data.
Last updated:
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Invested every Jan 1 after the first year.
Enter your values to see the result.
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How to use the S&P 500 Return Calculator
- Choose the start year (money invested on January 1) and the end year (valued on December 31).
- Enter the starting amount and, if you like, a yearly contribution.
- Tick Reinvest dividends for total return or untick for price return only.
- Press Calculate return to see the final value, CAGR and real return.
- Scroll the table to see each year's return, inflation and balance.
S&P 500 returns by decade
Compound annual total return (dividends reinvested) for each full decade, from the same data the calculator uses.
| Decade | Total return / yr | Inflation / yr | Real return / yr |
|---|---|---|---|
| 1930s | -0.1% | -2.0% | 2.0% |
| 1940s | 9.2% | 5.3% | 3.6% |
| 1950s | 19.4% | 2.2% | 16.8% |
| 1960s | 7.8% | 2.5% | 5.2% |
| 1970s | 5.9% | 7.4% | -1.4% |
| 1980s | 17.5% | 5.1% | 11.9% |
| 1990s | 18.2% | 2.9% | 14.9% |
| 2000s | -1.0% | 2.5% | -3.4% |
| 2010s | 13.6% | 1.8% | 11.6% |
| 2020–2025 | 15.1% | 4.0% | 10.7% |
Formulas used
- Price return = index level at year end ÷ level a year earlier − 1
- Total return = price return + dividends paid during the year, reinvested
- Growth factor = (1 + r1) × (1 + r2) × … × (1 + rn)
- CAGR = growth factor1/n − 1
- Real return = (1 + nominal) ÷ (1 + inflation) − 1
Lessons from the long-run data
- Start date matters. Starting in January 2000, at the peak of the dot-com bubble, gave far lower returns over the next decade than starting in 2009.
- Down years are normal. Roughly one year in four has been negative, yet every 20-year calendar window since 1928 has had a positive total return.
- Inflation eats returns. The 1970s returned 5.9% a year in nominal terms but lost about 1.4% a year after inflation.
- Reinvest dividends. Over decades, reinvested dividends account for a large share of the market's total gain.
Frequently asked questions
What is the average annual return of the S&P 500?
From 1928 through 2025 the S&P 500's compound annual total return with dividends reinvested is about 10.2% a year, or roughly 7% after inflation. Individual years ranged from −43% (1931) to +54% (1933).
How much do dividends add to S&P 500 returns?
A lot over long periods. Over 1928–2025, price gains alone compound at about 6.3% a year; reinvested dividends lift it to about 10.2%. In recent decades the dividend yield has been lower, around 1.5–2% a year.
How is CAGR calculated here?
CAGR = (product of (1 + each year's return))^(1/years) − 1. It is the steady yearly rate that would turn the starting amount into the ending amount, ignoring contributions.
How is the inflation-adjusted return calculated?
Each year is deflated by the US CPI-U December-to-December change. Real growth = nominal growth ÷ cumulative inflation, and the real value is shown in start-year dollars.
Does the calculator include fees and taxes?
No. It shows index returns. A low-cost index fund trails the index by its expense ratio (often 0.03%–0.10% a year), and taxes on dividends and gains in a taxable account reduce returns further.
Why does my result differ from other S&P 500 calculators?
Calculators use different data: monthly vs yearly, exact dates vs whole calendar years, and slightly different dividend series. This tool uses whole calendar years, so it is best for multi-year comparisons.
Is the 2026 return included?
No. The data runs through December 31, 2025 because a calendar-year return is only final once the year ends.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.
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