Total return is the complete measure of investment performance: it includes price appreciation and every dollar of dividends, assuming those dividends were reinvested back into the investment. The S&P 500's ~10% long-run average is a total return figure — the price-only return is closer to 6–7%. The missing 3–4% is dividends, and it compounds into something enormous over decades.
To calculate total return for your actual investments, enter your initial value and ending value in Mode A — making sure "ending value" includes the value of any reinvested dividends (i.e., it reflects your total account value, not just price appreciation). The calculator then gives you the total return percentage and annualized rate.
Why dividends compound into a massive share of total return
The arithmetic is counterintuitive. The S&P 500 started 2000 at about 1,469. In early 2025 it was around 5,900 — a price return of roughly 301%, or about 5.1% annualized. But with dividends reinvested (total return), the annualized figure is closer to 7.5%, which compounds the absolute growth to roughly 6× over the same period. The dividend reinvestment multiplied the real-world outcome by nearly 2×.
This happens because dividends buy additional shares at whatever the current price is. During market downturns, those dividend dollars buy more shares cheaply — shares that appreciate in the subsequent recovery. During bull markets, they buy fewer shares but at higher prices. Over time, this continuous reinvestment acts like a systematic version of dollar-cost averaging.
Price return index vs. total return index
Most financial news quotes price-return indices (the S&P 500 as reported on CNBC does not include dividends). The total return equivalent is the S&P 500 Total Return Index (ticker: SPTR). This distinction matters when you evaluate your portfolio: your brokerage account includes reinvested dividends, so you should compare it to the total return index, not the headline price index.
ETFs and mutual funds that track the S&P 500 report their performance as total return. If SPY shows a 5-year return that looks higher than the S&P 500 price index over the same period, it is because dividends are included in fund performance.
Frequently asked questions
How do I calculate total return on an investment?
Total return = (Ending Value + Dividends Received − Beginning Value) / Beginning Value. If you reinvested dividends, your ending value already includes them and you just use (Ending − Beginning) / Beginning. Enter these in Mode A above to get the total return percentage and the annualized rate (CAGR).
What is the difference between total return and price return?
Price return measures only the change in an asset's market price. Total return adds any income distributed (dividends, coupons, distributions) and assumes those were reinvested. For most U.S. stocks and index funds, total return exceeds price return by the dividend yield — historically 1.5–4% per year for the S&P 500.
Does the S&P 500 10% average include dividends?
Yes — the widely cited ~10% long-run S&P 500 average is a total return figure (dividends reinvested). The price-only return is approximately 6–7% per year. This distinction matters enormously over long horizons: $10,000 at 10% total return for 30 years grows to $174,494; at 6.5% price-only return it grows to about $66,140 — less than half.
Should I reinvest dividends?
For long-term investors not needing current income, reinvesting dividends is mathematically superior to taking them as cash. The compounding effect compounds your growing share count, which generates larger dividends, which buy more shares. Most brokerages offer automatic dividend reinvestment (DRIP) at no charge. The main exception: if dividends are taxed as current income and you cannot afford that tax hit, receiving some as cash may be necessary.