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The first $100,000

Mark each $25,000 milestone and watch the balance shift from contribution-led to growth-led.

2 minutesYou'll need: A starting amount, monthly deposit, and hypothetical returnNothing you type leaves your browser

Working sketchINPUT → RESULT
Each $25,000 mark records the changing share built by deposits and growth.

Starting example. These made-up figures are here to make the calculator readable. Edit any field; this working copy is not saved.

Start here: replace the example figures with yours, read the main result, then change one number at a time to see what matters most.

Not an S&P 500 forecast

The fourth marker

The model reaches $100,000 after 8 yr 4 mo. By then, $75,000 came from money deposited and $25,463 from modeled growth.
The date moves every time the contribution or return assumption moves. A real market path would move unevenly.

$25,000

mark 01

$23,250 deposited · $2,084 modeled growth

2 yr 7 mo

$50,000

mark 02

$42,750 deposited · $7,527 modeled growth

4 yr 9 mo

$75,000

mark 03

$60,000 deposited · $15,605 modeled growth

6 yr 8 mo

$100,000

mark 04

$75,000 deposited · $25,463 modeled growth

8 yr 4 mo

$25,000 is reached in 2 yr 7 mo with $23,250 deposited and $2,084 of modeled growth. $50,000 is reached in 4 yr 9 mo with $42,750 deposited and $7,527 of modeled growth. $75,000 is reached in 6 yr 8 mo with $60,000 deposited and $15,605 of modeled growth. $100,000 is reached in 8 yr 4 mo with $75,000 deposited and $25,463 of modeled growth.

What changes the answer

At 7.0%, the first milestones are mostly deposits. Growth has more balance to work on at each later mark, so its share can widen even when the monthly habit stays the same.

The title is a measuring line, not a universal threshold. A smaller milestone reached consistently is still real progress.

These calculators are educational estimates based on the numbers and assumptions you enter. Real results vary, and projections are not guarantees. Nothing here is personalized investment, tax, or legal advice.

See the assumptions behind this estimate

What the calculator assumes

  • The hypothetical return is an effective annual rate applied through an equivalent monthly rate.
  • The starting amount is available today and deposits arrive at the end of each month.
  • Milestones are searched within a 60-year modeled window.

What it leaves out

  • The calculation uses a smooth return and does not reproduce real market gains, losses, fees, taxes, or inflation.
  • A milestone not shown is not mathematically impossible; it was not reached inside the modeled window.

Useful next steps

Milestones are a way to see the changing mix of deposits and growth, not a promise that a particular return will arrive on schedule.

Public resources only. Networthy has no financial relationship with these sources.

An estimate is a starting point. Test the assumption doing the most work, then take the next question in order.

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