$750 a month for 30 years at returns from 4% to 10%
| Return | Balance | Of which growth | In today’s dollars |
|---|---|---|---|
| 4% | $513,953 | $243,953 | $211,742 |
| 5% | $611,532 | $341,532 | $251,943 |
| 6% | $730,885 | $460,885 | $301,115 |
| 7% | $877,089 | $607,089 | $361,349 |
| 8% | $1,056,413 | $786,413 | $435,228 |
| 10% | $1,547,132 | $1,277,132 | $637,398 |
Year by year at 7%
| Year | Put in so far | Balance | In today’s dollars |
|---|---|---|---|
| 1 | $9,000 | $9,285 | $9,015 |
| 2 | $18,000 | $19,220 | $18,117 |
| 3 | $27,000 | $29,851 | $27,318 |
| 5 | $45,000 | $53,397 | $46,061 |
| 10 | $90,000 | $128,289 | $95,459 |
| 15 | $135,000 | $233,329 | $149,765 |
| 20 | $180,000 | $380,652 | $210,758 |
| 25 | $225,000 | $587,281 | $280,489 |
| 30 | $270,000 | $877,089 | $361,349 |
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 $750 a month 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) |
|---|---|---|---|
| 15 years | $154,979 | $222,960 | $317,019 |
| 30 years | $461,981 | $800,129 | $1,425,138 |
The middle of the simulation sits below the steady 7% figure of $877,089 because ups and downs cost compounding: a 20% loss needs a 25% gain to get back.
What $877,089 would pay in retirement
At a 4% first-year withdrawal, $877,089 pays about $35,084 a year, $2,924 a month, before tax; in today’s dollars that is about $14,454 a year. How long a balance near it lasts at each withdrawal: how long $900,000 lasts. To stop saving early and let growth do the rest, see Coast FIRE numbers by age.
$9,000 a year is more than the 2026 IRA limit of $7,500 but fits in a 401(k), 403(b) or TSP, whose limit is $24,500. See contribution limits, the 401(k) calculator and the Roth IRA calculator.
$750 a month for other terms
| Years | Balance | In today’s dollars |
|---|---|---|
| $750 a month for 5 years | $53,397 | $46,061 |
| $750 a month for 10 years | $128,289 | $95,459 |
| $750 a month for 15 years | $233,329 | $149,765 |
| $750 a month for 20 years | $380,652 | $210,758 |
| $750 a month for 25 years | $587,281 | $280,489 |
| 30 years | $877,089 | $361,349 |
| $750 a month for 35 years | $1,283,560 | $456,156 |
| $750 a month for 40 years | $1,853,657 | $568,251 |
Other amounts for 30 years
$50 a month: $58,473, $100 a month: $116,945, $150 a month: $175,418, $200 a month: $233,891, $250 a month: $292,363, $300 a month: $350,836, $400 a month: $467,781, $500 a month: $584,726, $600 a month: $701,672, $1,000 a month: $1,169,453, $1,500 a month: $1,754,179, $2,000 a month: $2,338,905, $2,500 a month: $2,923,632, $3,000 a month: $3,508,358, $5,000 a month: $5,847,263.
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.