A 20,000-person survey: how savings compound with age
A survey of about 20,000 money-conscious people in the US shows in numbers how steady saving compounds with age. The results reflect a self-selected audience interested in personal finance, not the national average, but they work well as a roadmap.
In Brief
- Respondents’ median age is 36 and their median net worth is $725,000.
- Median investable wealth, excluding the home, is $481,000 and reaches $1 million in the 40s.
- At age 36, every dollar invested has the potential to grow into about $11 by retirement.
Who are these savers?
Most respondents are still in the accumulation phase. 23% are in their 20s, 40.6% in their 30s and 22.3% in their 40s.
The median age is 36 and 69% are married. So most are in the “messy middle”, when expenses are at their heaviest.
Responses came from all 50 US states. High- and low-cost areas are both represented, suggesting saving habits work regardless of geography.
The multiplier of time
A 36-year-old’s “wealth multiplier” is 11.33. That means each dollar invested today could grow into roughly $11 by retirement.
The multiplier shrinks with age. This is exactly where starting early pays off: the same amount reaches a bigger result the earlier it starts working.
Wealth by age
Median net worth, including home, car and all assets minus debts, is $725,000. By age group:
| Age | Net worth (median) | Investable wealth (median) |
|---|---|---|
| 20s | $171,000 | $118,000 |
| 30s | $650,000 | $425,000 |
| 40s | $1.4 million | $1 million |
| 50s | $2.3 million | $1.7 million |
| 60s | $3.1 million | $2.3 million |
Investable wealth measures the money working in retirement and investment accounts, excluding the home. It is a more useful gauge than net worth for a financial independence goal.
A common rule of thumb targets savings equal to one year’s income by age 30. This group clears that bar comfortably and reaches $1 million in investable wealth in their 40s, about a decade before the average millionaire.
Income alone doesn’t explain it
Respondents’ median income is $172,000. It is $114,000 in the 20s, $218,000 in the 40s and $205,000 in the 50s.
Income is high, but the real difference is how much of it is invested regularly. For people in their 20s, these figures are a direction rather than a target: savings gain momentum over time.
Key Assets
| Asset | Outlook | Why? | Key Level |
|---|---|---|---|
| Net worth | Positive | Steady saving compounds with age | Median $725,000 |
| Investable wealth | Positive | Non-home assets work over the long run | $1 million in 40s |
| Time (wealth multiplier) | Positive | Money invested early grows longer | 11.33 at age 36 |
| Income | Neutral | High, but not decisive on its own | Median $172,000 |
What to Watch
- The survey reflects a self-selected audience interested in personal finance; it has limited power to represent the whole country.
- The figures reflect US income and price levels; direct comparison with other countries can mislead.
- Comparing with others’ numbers can sap motivation; the real measure is your own trajectory.
This note was compiled from open-source data and content available online; it does not constitute investment advice.
This article is for general information only and is not investment advice.