$20,000 for 50 years at returns from 4% to 10%
| Return | Balance | Multiple | In today’s dollars |
|---|---|---|---|
| 4% | $142,134 | 7.1× | $32,422 |
| 5% | $229,348 | 11.5× | $52,316 |
| 6% | $368,403 | 18.4× | $84,035 |
| 7% | $589,141 | 29.5× | $134,387 |
| 8% | $938,032 | 46.9× | $213,972 |
| 10% | $2,347,817 | 117.4× | $535,554 |
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 |
| 5 | $20,000 | $28,051 | $24,197 |
| 10 | $20,000 | $39,343 | $29,275 |
| 15 | $20,000 | $55,181 | $35,418 |
| 20 | $20,000 | $77,394 | $42,851 |
| 25 | $20,000 | $108,549 | $51,843 |
| 30 | $20,000 | $152,245 | $62,723 |
| 35 | $20,000 | $213,532 | $75,886 |
| 40 | $20,000 | $299,489 | $91,810 |
| 45 | $20,000 | $420,049 | $111,077 |
| 50 | $20,000 | $589,141 | $134,387 |
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) |
|---|---|---|---|
| 25 years | $42,659 | $91,897 | $188,699 |
| 50 years | $149,462 | $432,870 | $1,235,238 |
The middle of the simulation sits below the steady 7% figure of $589,141 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $589,141 would pay in retirement
At a 4% first-year withdrawal, $589,141 pays about $23,566 a year, $1,964 a month, before tax; in today’s dollars that is about $5,375 a year. How long a balance near it lasts at each withdrawal: how long $600,000 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 |
| $20,000 for 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 |
| 50 years | $589,141 | $134,387 |
Other amounts for 50 years
$1,000: $29,457, $5,000: $147,285, $10,000: $294,570, $25,000: $736,426, $50,000: $1,472,851, $100,000: $2,945,703, $200,000: $5,891,405, $250,000: $7,364,256, $500,000: $14,728,513, $1,000,000: $29,457,025, $2,000,000: $58,914,050.
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.