# What Is the Average Stock Market Return? (And Why the "10%" Number Is Tricky)
Ask almost any investor what the stock market returns, and you will hear the same answer: "about 10% a year." It is the most famous number in investing. But that single figure hides a lot of important detail, and misunderstanding it can wreck your expectations. Let us unpack what the average stock market return really is, and how to use it sensibly.
The Famous Number: About 10%
When people say "the market," they usually mean the S&P 500, the index of 500 large US companies. Since its creation in the 1950s, the S&P 500 has delivered an average annual return of roughly 10%, including dividends. That long track record is exactly why low-cost index funds are so widely recommended.
So the 10% number is real. But three big asterisks change how you should think about it.
Asterisk 1: Inflation Eats Into It
A 10% return is the nominal return, before inflation. What actually matters is your real return, what your money can buy after rising prices.
Historically, inflation has averaged around 3% a year. Subtract that, and the market's real return drops to roughly 7%. That is still excellent, money doubling in real terms roughly every decade, but it is the more honest number to plan with. If you build a retirement plan assuming a full 10% of purchasing power, you will likely come up short.
Asterisk 2: "Average" Almost Never Happens
Here is the trap. The market averages about 10%, but it almost never returns 10% in a given year. Real years are wild: up 25%, down 15%, up 12%, down 4%. The "average" is just the long-run result of stitching together those extreme swings.
In fact, single years land near 10% surprisingly rarely. This is the single most important thing for a new investor to internalize: volatility is the price of admission. You do not get the smooth 10%; you get a bumpy road that averages to it, but only if you stay invested through the scary parts.
Asterisk 3: Time Changes Everything
Over one year, the market is basically a coin flip, it can drop 30% or soar 30%. But the longer your time horizon, the more reliable that average becomes. Over 20 or 30 years, the ups and downs smooth out, and returns have historically clustered much closer to that long-term average.
This is why time in the market beats timing the market, and why compound interest is so powerful. The longer you let it run, the more the average works in your favor.
How to Use This Number Wisely
A few practical takeaways:
- Plan with real returns (~7%), not headline returns (10%). It keeps your expectations honest.
- Expect volatility, do not fear it. Down years are normal and unavoidable. Selling in a panic is how investors turn a temporary dip into a permanent loss.
- Give it time. The average only shows up reliably over long horizons, so the best move is to invest consistently and hold.
- Keep costs low. Fees come straight out of your return, which is why cheap index funds like VOO or VTI are so popular.
A great way to see this in action is to run the numbers yourself: even modest, consistent investing at a 7% real return grows into serious money over decades thanks to compounding.
The Bottom Line
The stock market's average return of about 10% (roughly 7% after inflation) is one of the most reliable wealth-building facts in history, but only for patient, long-term investors. The average is a destination, not a yearly promise. The path there is bumpy, and staying on it is the whole game.
Our take: Use the ~7% real return as your planning anchor, expect plenty of turbulence along the way, and remember that the investors who actually capture that average are the ones who stay invested through the storms. Consistency and patience, not prediction, are what turn a historical average into your own real-world wealth.---
This article is for informational purposes only and is not financial advice. Past performance does not guarantee future results. Always do your own research before investing.
