$100,000 for 40 years at returns from 4% to 10%
| Return | Balance | Multiple | In today’s dollars |
|---|---|---|---|
| 4% | $480,102 | 4.8× | $147,179 |
| 5% | $703,999 | 7.0× | $215,816 |
| 6% | $1,028,572 | 10.3× | $315,316 |
| 7% | $1,497,446 | 15.0× | $459,052 |
| 8% | $2,172,452 | 21.7× | $665,980 |
| 10% | $4,525,926 | 45.3× | $1,387,453 |
Year by year at 7%
| Year | Put in so far | Balance | In today’s dollars |
|---|---|---|---|
| 1 | $100,000 | $107,000 | $103,883 |
| 2 | $100,000 | $114,490 | $107,918 |
| 3 | $100,000 | $122,504 | $112,109 |
| 5 | $100,000 | $140,255 | $120,985 |
| 10 | $100,000 | $196,715 | $146,375 |
| 15 | $100,000 | $275,903 | $177,092 |
| 20 | $100,000 | $386,968 | $214,255 |
| 25 | $100,000 | $542,743 | $259,217 |
| 30 | $100,000 | $761,226 | $313,615 |
| 35 | $100,000 | $1,067,658 | $379,428 |
| 40 | $100,000 | $1,497,446 | $459,052 |
The range in 1,000 simulated markets
A 7% average does not arrive as 7% every year. In 1,000 simulated sequences of returns averaging 7% with 12% volatility, this is where $100,000 ended up: 1 in 10 markets finished below the first figure, half below the middle one, and 1 in 10 above the last.
| After | Weak (1 in 10 lower) | Middle | Strong (1 in 10 higher) |
|---|---|---|---|
| 20 years | $173,965 | $333,740 | $641,783 |
| 40 years | $455,480 | $1,169,244 | $2,953,393 |
The middle of the simulation sits below the steady 7% figure of $1,497,446 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $1,497,446 would pay in retirement
At a 4% first-year withdrawal, $1,497,446 pays about $59,898 a year, $4,991 a month, before tax; in today’s dollars that is about $18,362 a year. How long a balance near it lasts at each withdrawal: how long $1.5 million lasts. To stop saving early and let growth do the rest, see Coast FIRE numbers by age.
$100,000 for other terms
| Years | Balance | In today’s dollars |
|---|---|---|
| $100,000 for 5 years | $140,255 | $120,985 |
| $100,000 for 10 years | $196,715 | $146,375 |
| $100,000 for 15 years | $275,903 | $177,092 |
| $100,000 for 20 years | $386,968 | $214,255 |
| $100,000 for 25 years | $542,743 | $259,217 |
| $100,000 for 30 years | $761,226 | $313,615 |
| 40 years | $1,497,446 | $459,052 |
| $100,000 for 50 years | $2,945,703 | $671,936 |
Other amounts for 40 years
$1,000: $14,974, $5,000: $74,872, $10,000: $149,745, $20,000: $299,489, $25,000: $374,361, $50,000: $748,723, $200,000: $2,994,892, $250,000: $3,743,614, $500,000: $7,487,229, $1,000,000: $14,974,458, $2,000,000: $29,948,916.
How it is worked out
Monthly amounts are deposited at the end of each month and compounded monthly at the rate that equals the annual return; lump sums compound once a year. The headline return is 7% a year, the Trinity-style average the site’s retirement pages use; stock-heavy portfolios have averaged more over long periods and bond-heavy ones less, which is why every page shows 4% to 10%. Today’s dollars divide by 3% inflation a year. The range comes from 1,000 simulated sequences of yearly returns averaging 7% with 12% volatility, with each year’s deposits added through the year. Fees and taxes are not taken out. More on the methodology page.