$20,000 for 20 years at returns from 4% to 10%
| Return | Balance | Multiple | In today’s dollars |
|---|---|---|---|
| 4% | $43,822 | 2.2× | $24,263 |
| 5% | $53,066 | 2.7× | $29,381 |
| 6% | $64,143 | 3.2× | $35,514 |
| 7% | $77,394 | 3.9× | $42,851 |
| 8% | $93,219 | 4.7× | $51,613 |
| 10% | $134,550 | 6.7× | $74,497 |
Year by year at 7%
| Year | Put in so far | Balance | In today’s dollars |
|---|---|---|---|
| 1 | $20,000 | $21,400 | $20,777 |
| 2 | $20,000 | $22,898 | $21,584 |
| 3 | $20,000 | $24,501 | $22,422 |
| 4 | $20,000 | $26,216 | $23,293 |
| 5 | $20,000 | $28,051 | $24,197 |
| 6 | $20,000 | $30,015 | $25,137 |
| 7 | $20,000 | $32,116 | $26,113 |
| 8 | $20,000 | $34,364 | $27,127 |
| 9 | $20,000 | $36,769 | $28,181 |
| 10 | $20,000 | $39,343 | $29,275 |
| 11 | $20,000 | $42,097 | $30,412 |
| 12 | $20,000 | $45,044 | $31,593 |
| 13 | $20,000 | $48,197 | $32,820 |
| 14 | $20,000 | $51,571 | $34,094 |
| 15 | $20,000 | $55,181 | $35,418 |
| 16 | $20,000 | $59,043 | $36,794 |
| 17 | $20,000 | $63,176 | $38,223 |
| 18 | $20,000 | $67,599 | $39,707 |
| 19 | $20,000 | $72,331 | $41,249 |
| 20 | $20,000 | $77,394 | $42,851 |
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 $20,000 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 | $23,277 | $36,977 | $56,970 |
| 20 years | $34,793 | $66,748 | $128,357 |
The middle of the simulation sits below the steady 7% figure of $77,394 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $77,394 would pay in retirement
At a 4% first-year withdrawal, $77,394 pays about $3,096 a year, $258 a month, before tax; in today’s dollars that is about $1,714 a year. How long a balance near it lasts at each withdrawal: how long $100,000 lasts. To stop saving early and let growth do the rest, see Coast FIRE numbers by age.
$20,000 for other terms
| Years | Balance | In today’s dollars |
|---|---|---|
| $20,000 for 5 years | $28,051 | $24,197 |
| $20,000 for 10 years | $39,343 | $29,275 |
| $20,000 for 15 years | $55,181 | $35,418 |
| 20 years | $77,394 | $42,851 |
| $20,000 for 25 years | $108,549 | $51,843 |
| $20,000 for 30 years | $152,245 | $62,723 |
| $20,000 for 40 years | $299,489 | $91,810 |
| $20,000 for 50 years | $589,141 | $134,387 |
Other amounts for 20 years
$1,000: $3,870, $5,000: $19,348, $10,000: $38,697, $25,000: $96,742, $50,000: $193,484, $100,000: $386,968, $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.