$100,000 for 20 years at returns from 4% to 10%
| Return | Balance | Multiple | In today’s dollars |
|---|---|---|---|
| 4% | $219,112 | 2.2× | $121,317 |
| 5% | $265,330 | 2.7× | $146,907 |
| 6% | $320,714 | 3.2× | $177,571 |
| 7% | $386,968 | 3.9× | $214,255 |
| 8% | $466,096 | 4.7× | $258,066 |
| 10% | $672,750 | 6.7× | $372,485 |
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 |
| 4 | $100,000 | $131,080 | $116,463 |
| 5 | $100,000 | $140,255 | $120,985 |
| 6 | $100,000 | $150,073 | $125,684 |
| 7 | $100,000 | $160,578 | $130,565 |
| 8 | $100,000 | $171,819 | $135,635 |
| 9 | $100,000 | $183,846 | $140,903 |
| 10 | $100,000 | $196,715 | $146,375 |
| 11 | $100,000 | $210,485 | $152,059 |
| 12 | $100,000 | $225,219 | $157,964 |
| 13 | $100,000 | $240,985 | $164,099 |
| 14 | $100,000 | $257,853 | $170,471 |
| 15 | $100,000 | $275,903 | $177,092 |
| 16 | $100,000 | $295,216 | $183,969 |
| 17 | $100,000 | $315,882 | $191,114 |
| 18 | $100,000 | $337,993 | $198,535 |
| 19 | $100,000 | $361,653 | $206,246 |
| 20 | $100,000 | $386,968 | $214,255 |
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) |
|---|---|---|---|
| 10 years | $116,387 | $184,887 | $284,851 |
| 20 years | $173,965 | $333,740 | $641,783 |
The middle of the simulation sits below the steady 7% figure of $386,968 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $386,968 would pay in retirement
At a 4% first-year withdrawal, $386,968 pays about $15,479 a year, $1,290 a month, before tax; in today’s dollars that is about $8,570 a year. How long a balance near it lasts at each withdrawal: how long $400,000 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 |
| 20 years | $386,968 | $214,255 |
| $100,000 for 25 years | $542,743 | $259,217 |
| $100,000 for 30 years | $761,226 | $313,615 |
| $100,000 for 40 years | $1,497,446 | $459,052 |
| $100,000 for 50 years | $2,945,703 | $671,936 |
Other amounts for 20 years
$1,000: $3,870, $5,000: $19,348, $10,000: $38,697, $20,000: $77,394, $25,000: $96,742, $50,000: $193,484, $200,000: $773,937, $250,000: $967,421, $500,000: $1,934,842, $1,000,000: $3,869,684, $2,000,000: $7,739,369.
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.