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Net worth projection

Where a starting balance and a monthly contribution land over the next 40 years.

Assumption basis: S&P 500 long-run returns · BLS CPI
Your inputs
Starting balance
$
Monthly contribution
$/ mo
Horizon
Annual return
%

7% is the long-run S&P 500 average after inflation is left in nominal terms.

Contribution growth
% / yr

Most people save more as pay rises. Set 0 to hold it flat.

Inflation
% / yr
In 30 years
$3.4M
In future dollars, before inflation
The path
NowYear 15Year 30
Balance$3.4M
What you put in$1.0M
You contribute$973,634
Starting balance$50,000
Investment growth$2,370,786
Balance in 30 years$3,394,420

Growth of $2.4M exceeds the $974k you put in: past roughly the halfway point of a horizon this long, returns do more of the work than contributions. In today’s dollars the same balance is $1.6M.

When you cross each mark
$100kyear 2
$250kyear 6
$500kyear 11
$1.0Myear 17
$2.0Myear 24
$5.0Mbeyond this horizon

Measured in future dollars. A million in 30 years is not a million today, which is what the toggle above is for.

A constant return applied monthly. Real markets do not deliver an average year: a sequence with the same average but a bad first decade lands materially lower, which this projection cannot show. Taxes and fees are not modeled. Nothing here is a forecast.

This answers one question in isolation. The playbook puts your answers in order and tells you which one to act on first.

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