Average Stock Market Return: What History Tells Us
Updated June 2026 · 6 min read
📑 Table of Contents
When people say "the market," they usually mean the S&P 500. And when they ask "what's the average return," the answer depends on what you count and how you measure it.
The Numbers: 100 Years of S&P 500
| Period | Nominal Return | Real Return (after inflation) |
|---|---|---|
| 1926-2026 (99 years) | ~10.0% | ~7.0% |
| Last 50 years | ~10.5% | ~6.6% |
| Last 30 years | ~9.7% | ~7.2% |
| Last 10 years | ~13.1% | ~10.1% |
| 2000-2010 ("Lost Decade") | ~-1.0% | ~-3.5% |
The key takeaway: the long-term average is about 10% nominal, 7% real. But any single decade can deviate wildly from that average.
Nominal vs. Real Returns: Why Inflation Matters
A 10% return that loses 3% to inflation is really a 7% return in purchasing power. Over 30 years, that 3% gap compounds into a massive difference. This is why financial planners use real returns for retirement projections — $1 million in 2055 will not buy what $1 million buys today.
The Danger of Recency Bias
The last 10 years have been exceptional — ~13% annual returns. Many new investors assume this is normal. It is not. The last decade benefited from near-zero interest rates and a historic tech bull run. Future returns are widely expected to be lower. Major institutions forecast 5-7% nominal returns for the next decade, not 13%.
What to Expect Going Forward
- Conservative estimate: 5-6% nominal (2-3% real)
- Base case: 7-8% nominal (4-5% real)
- Optimistic: 9-10% nominal (6-7% real)
How to Use These Numbers in Your Planning
Never assume the best-case scenario. Use a 6-7% nominal return as your planning assumption for long-term goals. This gives you a margin of safety. If returns are higher, great. If lower, you are still on track.
For retirement planning, use our compound interest calculator with a 7% rate and see your projected balance. Then try 5% — the gap between those numbers is your risk buffer.