Investing
What the Stock Market Actually Returns Over 30 Years, After Inflation
📅 Last Updated: July 2026
⏱ 6 min read
✦ Get Rich Slow
By Michael Azzolina · CPA · MBA
Quick Answer
The S&P 500 has averaged about 10% a year since 1928 in nominal terms, but after inflation, the real return is closer to 7%. That 7% is the number that actually matters for planning, since it reflects what your money can actually buy. Real 30-year returns have historically ranged from about 4% to 9% depending on the specific decades you're invested through.
The number you usually hear is "the market returns about 10% a year." That's true for the S&P 500 since 1928, measured in nominal dollars. It's also the wrong number to plan a retirement around, because it ignores what those dollars are actually worth by the time you spend them.
Nominal, inflation, and real: 3 different numbers
Nominal return is what your account statement shows. Inflation is how much prices rose over the same period. Real return is nominal return minus inflation: what your money actually grew by, in terms of what it can buy. All 3 numbers are true at the same time. Only 1 of them tells you what you can actually spend later.
Nominal average annual return (S&P 500, since 1928)~10%
Average annual inflation over the same period~3%
Real (inflation-adjusted) average annual return~7%
Roughly 3 of every 10 percentage points of "market return" get eaten by inflation before you ever see them. The 7% that's left over is the number that actually matters for planning: it's the same 7% used throughout this site's compound interest illustrations, and it's the real growth rate behind the 4% withdrawal rule covered in What Financial Freedom Actually Looks Like.
What that gap does to $10,000 over 30 years
The difference between nominal and real return doesn't feel like much year to year. Compounded over a full 30-year window, it's the difference between what your account balance says and what it can actually buy.
$10,000 invested for 30 years, no additional contributions
Nominal balance after 30 years (10%/year)~$174,500
Real (today's-dollars) balance after 30 years (7%/year)~$76,100
Difference: purchasing power inflation quietly took~$98,400
Illustrative, based on the long-run historical averages above. Actual returns and inflation in any specific 30-year period will differ from the long-run average, sometimes by a lot. See the range below.
The average hides a wide range
"7% real, on average" is true across the full history of the market. It is not true of every 30-year window inside that history. Rolling 30-year real returns have historically ranged from about 4% to about 9% a year, depending on the specific 30 years you happen to be invested through. That's not a rounding error. Over 30 years, it's the difference between a comfortable number and a tight one.
$10,000 for 30 years: the range of real (inflation-adjusted) outcomes
Weak 30-year window (~4% real)~$32,400
Average 30-year window (~7% real)~$76,100
Strong 30-year window (~9% real)~$132,700
Illustrative range based on the historical spread of rolling 30-year real S&P 500 returns. Which end of the range you land on depends on which 30 years you happen to invest through, something no one can pick in advance.
Nobody gets to choose their 30-year window. The range above is the honest reason to keep contributing consistently through the whole period instead of trying to time entries and exits, and to build in a margin of safety instead of planning around the best-case number.
How to actually use this
Plan around the real return, not the nominal one, the same way this site's 4% rule and compound interest examples already do. Treat 7% as a reasonable long-run planning assumption, not a guarantee for your specific 30 years. And keep contributing on the way down as much as the way up: the range above is the whole argument for staying invested through weak stretches instead of trying to guess which years to skip. That psychology, why staying the course beats trying to guess, is worth its own read: see Why Market Timing Feels Smart and Loses Money Anyway.
I see a version of this argument play out constantly in comments online: someone points out that 10%, or even the 7% real figure, is just what happened historically, with no guarantee it repeats. That's a fair point on its own. What I've never once seen paired with it is a better estimate of what to actually plan around instead. Pointing out that the past isn't a guarantee is true, but on its own it isn't a plan. Until someone has a more defensible number, the long-run historical range above is still the most honest starting point available.
The takeaway
The market has returned about 10% a year nominally since 1928, and about 7% a year after inflation. That 7% is the number that actually matters for planning. It's also an average masking a real range, roughly 4% to 9% depending on your specific 30 years, which is the honest argument for consistency over prediction.
Frequently Asked Questions
What has the stock market actually returned over time?
About 10% a year since 1928 in nominal terms, meaning what your account statement shows. After subtracting inflation, the real return is closer to 7%, which is what your money actually grew by in terms of what it can buy. Roughly 3 of every 10 percentage points of nominal return get eaten by inflation before you ever see them.
Is 7% a reliable number to plan around?
As a long-run average, yes, but not for every specific 30-year period. Rolling 30-year real returns have historically ranged from about 4% to about 9% a year, depending on the specific 30 years you happen to be invested through. Over 30 years, that range is the difference between a comfortable retirement number and a tight one, so it's worth planning with a range in mind, not a single point estimate.
What's the difference between nominal, inflation, and real returns?
Nominal return is what your account statement shows. Inflation is how much prices rose over the same period. Real return is nominal return minus inflation, meaning what your money actually grew by in terms of purchasing power. All 3 numbers are true at the same time, they just answer different questions, and real return is the one that matters for planning how much you'll actually be able to spend.