What $100,000 Grows To: Stocks vs Real Estate vs Savings (10 and 20 Year Comparison)

Same money, very different outcomes

Where you put $100,000 today determines whether you end up with $150,000 or $670,000 in 20 years. This is not hypothetical. These are the real historical return profiles of common investment types.

Let us see what happens to $100,000 across five paths, with no additional contributions.

After 10 years

The S&P 500 and rental property pull ahead quickly. But notice that rental property returns include both cash flow and appreciation, while stocks are pure market growth.

After 20 years

At 20 years, the gap becomes enormous. The S&P 500 turns $100K into $672K. Cash under the mattress is still $100K but has lost roughly 45% of its purchasing power to inflation.

How rental property returns work

The rental property line deserves explanation because real estate returns come from multiple sources:

These numbers assume a $250,000 property with $100,000 down (40%), $750/month net cash flow, and 3% annual appreciation. The total return ($485K) is lower than the S&P 500 ($672K), but the rental investor only put $100K at risk while controlling a $250K asset. That is leverage at work.

Analyze your own rental property returns with our rental ROI calculator.

The real advantage of stocks: simplicity

Stocks require zero effort after the initial investment. You buy an S&P 500 index fund, set up automatic contributions, and check it once a year. There are no tenants, no maintenance calls, no vacancies, and no property taxes.

Real estate requires active management (or paying a manager 8-12% of rent). The higher potential returns come with higher effort and higher risk of individual property issues.

The real advantage of real estate: leverage and tax benefits

With stocks, $100K buys $100K of assets. With real estate, $100K can buy $250K-$400K of property through mortgage leverage. If the property appreciates 3%, that is $7,500-$12,000 per year of growth on your $100K investment, not the $3,000 you would get on $100K of stocks at 3%.

Real estate also offers tax benefits that stocks do not: depreciation deductions, mortgage interest deductions, and the ability to do 1031 exchanges to defer capital gains indefinitely.

What about adding $500/month?

If you contribute $500/month on top of the initial $100K, the 20-year picture changes dramatically:

$100K plus $500/month in the S&P 500 crosses the million-dollar mark at 20 years. Try your own combination with our compound interest calculator.

The bottom line

There is no single "best" investment. The right choice depends on your risk tolerance, time commitment, tax situation, and goals. But the data is clear on one thing: keeping large amounts of cash uninvested is the most expensive option of all.

Model your investment growth with our compound interest calculator, or analyze rental property returns with our rental ROI calculator.