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Free · Historical S&P 500 · Compound · Dividends reinvested

S&P 500 calculator

Explore dividend-reinvested S&P 500 history through 2024, then model a selected return assumption. The calculator's 10% default is illustrative; historical results are shown separately. Free, no sign-up.

Direct answer

What is the historical average return of the S&P 500?

In the annual Damodaran S&P 500 total-return series (1928–2024), dividends are reinvested and the annualized result is approximately 9.94% nominal, or 6.70% real after CPI inflation. A $10,000 investment in 1990 would be worth about $328,722 through 2024 in that annual series. The separate monthly S&P Composite view begins in 1871; neither historical series is a forecast.

A historical average is not a forecast. Test a range of nominal and real assumptions, then account for fees, taxes, inflation, contributions and withdrawals before using a projection.

Source: Damodaran (NYU Stern) + Shiller CAPE + BLS CPI-U

S&P 500 quick facts

  • Annualized nominal return 1928–2024: 9.94%/yr (total return, dividends reinvested)
    Damodaran, NYU Stern historical dataset
  • Annualized real return 1928–2024: 6.70%/yr (after CPI-U inflation)
    Damodaran + BLS CPI-U
  • Best calendar year in the stored series: +52.56% in 1954
    Damodaran annual return series
  • Worst calendar year in the stored series: -43.84% in 1931
    Damodaran annual return series
S&P 500 long-horizon returns · NYU Stern / Damodaran · Shiller Online Data · BLS CPI-U
Nominal 9.9% · real 6.7% · dividends reinvested through 2024
The stored Damodaran series shows 9.9% annualized nominal total return and 6.7% real return from 1928 through 2024. These are historical measurements, not a forecast.
The page keeps historical observations separate from forward projections so visitors can choose and stress-test their own assumptions.
Historical time machine · Monthly data since 1871

Explore historical returns with dividends reinvested and inflation adjustment, using a monthly S&P Composite series from 1871 through 2026-09. Recent dividend and inflation values include estimates. Change the amount or start date to compare results.

What if I invested $ in the S&P 500 in ?

Estimated value through Sep 2026
$463K
11.03%/yr · dividends reinvested
In 1990 purchasing power
$179K
8.18%/yr real return
If it stayed in cash
$3,856
real value left of $10K — inflation ate the rest
440 months · data through Sep 2026 · price-only value: $226K

Uses monthly average prices, not a live quote. Missing dividend and inflation observations are interpolated or extrapolated, so total and inflation-adjusted returns include estimates. Taxes and investment fees are excluded.

Example starting amounts and years
$1,000 in 1990
→ $33K
10.5%/yr over 35 yrs
$1,000 in 2000
→ $6,254
7.6%/yr over 25 yrs
$1,000 in 2010
→ $6,884
13.7%/yr over 15 yrs
$10,000 in 1990
→ $329K
10.5%/yr over 35 yrs
$10,000 in 2000
→ $63K
7.6%/yr over 25 yrs
$10,000 in 2010
→ $69K
13.7%/yr over 15 yrs
$100 in 1980
→ $16K
12.0%/yr over 45 yrs
$100 in 1990
→ $3,287
10.5%/yr over 35 yrs
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Since 1871, dividends reinvested
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Historical nominal and real
Or project the future ↓

S&P 500 historical returns

The stored series from 1928 through 2024measures annualized total return with dividends reinvested. The path is far from smooth; an average masks 30%+ down years and 30%+ up years.

  • 1928–2024: 9.9% nominal, 6.7% real
  • 1965–2024: 10.3% nominal annualized
  • 2000–2024: 7.6% nominal annualized
  • 2015–2024: 12.9% nominal annualized

Use a range of nominal and real assumptions for projections; no historical average guarantees a future result.

Dollar-cost averaging into the S&P 500

These illustrations assume a fixed 10% nominal annual rate, monthly compounding and deposits at the end of each month. They show the calculator convention, not a forecast of S&P 500 returns; actual results vary with market returns, fees, taxes and contribution timing.

Future value of monthly contributions at a fixed 10% nominal annual rate with month-end deposits
Monthly10 yrs20 yrs30 yrs40 yrs
$200$41k$151k$452k$1.26M
$500$102k$378k$1.13M$3.16M
$1,000$204k$757k$2.26M$6.32M
$2,000$408k$1.51M$4.52M$12.6M

Example S&P 500 funds (verify current fees)

  • FXAIX (Fidelity 500 Index)
  • SWPPX (Schwab S&P 500 Index)
  • VOO (Vanguard S&P 500 ETF)
  • IVV (iShares Core S&P 500)
  • SPY (SPDR S&P 500)
  • Compare each provider's current expense ratio, bid-ask spread, tax treatment and tracking difference before choosing.

S&P 500 Calculator FAQ

What is an S&P 500 calculator?

An S&P 500 calculator can do two separate jobs: show historical total returns with dividends reinvested, or model a future compound-growth scenario from a starting balance, contributions and an assumed rate. Historical results describe a past series; the assumed rate is an illustration, not a forecast.

How do I use the S&P 500 calculator?

Enter a starting balance, monthly contribution, return assumption and time horizon to model a compound-growth scenario. Use the historical view separately for dividends-reinvested observations, and test a range of assumptions instead of treating the 10% default as a forecast.

What return should I use for S&P 500 projections?

Use the historical series as context, then test a range of nominal and real assumptions that match your horizon. The 1928–2024 average is not a forecast, and fees, taxes, inflation, contributions and withdrawals change the outcome.

Does the S&P 500 calculator include dividends?

The historical view uses total return with dividends reinvested. An index fund's price return, distributions, fees and taxes can differ, so check the fund's prospectus and the series definition.

How long until $10,000 in the S&P 500 doubles?

Use the Rule of 72 as a shortcut: divide 72 by the nominal or real rate you want to test. At an illustrative 10% rate, the estimate is about 7.2 years; at 7%, about 10.3 years. Actual market paths do not double on a fixed schedule.

Has the S&P 500 ever lost money over 20 years?

In the stored 1928–2024 annual series, rolling-period results depend on the selected start and end years, and the available window is not a guarantee for future periods. Use the historical calculator to inspect a specific window and keep inflation and dividends defined consistently.

S&P 500 vs total stock market — does it matter?

The two indexes overlap heavily because large US companies make up much of a total-market index, but their holdings, concentration, fees, taxes and performance can differ by fund and period. Compare the specific fund disclosures and your desired diversification; neither choice is universally better.

Is the S&P 500 a good investment in 2026?

No calculator can establish whether an investment is suitable for you. Compare the fund's diversification, fees, taxes, volatility, time horizon and current valuation with alternatives, and test more than one return assumption.

What do nominal and real S&P 500 returns mean?

Nominal return is measured before inflation. Real return adjusts the same series for CPI inflation. In the stored 1928–2024 series, the annualized nominal result is 9.94% and the inflation-adjusted result is 6.70%; neither is a forecast.

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Methodology and editorial standards

Each calculator uses its own inputs and method. Review the labels, units and assumption notes shown with the result. Costs, taxes, fees, benefits and other factors are not modeled unless the page or calculator explicitly says they are. A fixed-rate projection is a scenario, not a forecast or personalized recommendation.

The editorial standards explain how Snowballr reviews calculators and sources. The sources index links to references used across the site. To report an error or suggest a correction, use the contact page.