$25,000 for 40 years at returns from 4% to 10%
| Return | Balance | Multiple | In today’s dollars |
|---|---|---|---|
| 4% | $120,026 | 4.8× | $36,795 |
| 5% | $176,000 | 7.0× | $53,954 |
| 6% | $257,143 | 10.3× | $78,829 |
| 7% | $374,361 | 15.0× | $114,763 |
| 8% | $543,113 | 21.7× | $166,495 |
| 10% | $1,131,481 | 45.3× | $346,863 |
Year by year at 7%
| Year | Put in so far | Balance | In today’s dollars |
|---|---|---|---|
| 1 | $25,000 | $26,750 | $25,971 |
| 2 | $25,000 | $28,623 | $26,979 |
| 3 | $25,000 | $30,626 | $28,027 |
| 5 | $25,000 | $35,064 | $30,246 |
| 10 | $25,000 | $49,179 | $36,594 |
| 15 | $25,000 | $68,976 | $44,273 |
| 20 | $25,000 | $96,742 | $53,564 |
| 25 | $25,000 | $135,686 | $64,804 |
| 30 | $25,000 | $190,306 | $78,404 |
| 35 | $25,000 | $266,915 | $94,857 |
| 40 | $25,000 | $374,361 | $114,763 |
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 $25,000 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 | $43,491 | $83,435 | $160,446 |
| 40 years | $113,870 | $292,311 | $738,348 |
The middle of the simulation sits below the steady 7% figure of $374,361 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $374,361 would pay in retirement
At a 4% first-year withdrawal, $374,361 pays about $14,974 a year, $1,248 a month, before tax; in today’s dollars that is about $4,591 a year. How long a balance near it lasts at each withdrawal: how long $350,000 lasts. To stop saving early and let growth do the rest, see Coast FIRE numbers by age.
$25,000 for other terms
| Years | Balance | In today’s dollars |
|---|---|---|
| $25,000 for 5 years | $35,064 | $30,246 |
| $25,000 for 10 years | $49,179 | $36,594 |
| $25,000 for 15 years | $68,976 | $44,273 |
| $25,000 for 20 years | $96,742 | $53,564 |
| $25,000 for 25 years | $135,686 | $64,804 |
| $25,000 for 30 years | $190,306 | $78,404 |
| 40 years | $374,361 | $114,763 |
| $25,000 for 50 years | $736,426 | $167,984 |
Other amounts for 40 years
$1,000: $14,974, $5,000: $74,872, $10,000: $149,745, $20,000: $299,489, $50,000: $748,723, $100,000: $1,497,446, $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.