Make your kid a millionaire
Time is the rarest asset in finance, and a newborn has 65 years of it. With the right deposit on the day they come home from the hospital, your child wakes up at 65 with seven figures whether they ever lift a finger.
Time is the single biggest input. A child born today has more of it than any of us — that's the whole edge.
The long runway
When the runway is 65 years long, the math stops feeling like math. A small deposit at birth has more than six decades to double, double again, and again. The same dollar that would barely move the needle for a 50-year-old becomes life-changing for a newborn.
A 401(k) is technically for people with a paycheck, so this money would actually live in a custodial Roth IRA (once your child has earned income), a 529 plan, or a UTMA brokerage account. The math is the same — only the wrapper changes.
Choose the goal and the runway
Three sliders set the stage: how big a nest egg you want to leave them, when they want to stop working, and how aggressive you want to be about the assumed return.
7% is the historical default, but real life is bumpy. Drag the return slider down to 5% or 4% to see what a more conservative assumption requires.
Path A — One deposit, at birth
The cleanest path: drop a single check in the account the day they come home from the hospital, and never touch it again. Compounding does the rest of the work for the next 65 years.
That's about the cost of a decent used car — paid once, never again.
Path B — A small check, every month
Don't have a five-figure check sitting around at birth? Spread it out. The same $1,000,000 target, but funded by a tiny automatic transfer every month from now until they retire.
You put in $49,248. The market does the other $950,752 of work.
Path C — A birthday check, once a year
Even simpler: write one check a year. A birthday tradition, a tax-refund tradition, a year-end ritual. Same target, funded once a year for 65 years.
Less work than monthly, slightly more out-of-pocket because the money waits longer between deposits.
All three paths, on one chart
Same destination, three different roads. The lump-sum line starts way up the y-axis and curves up smoothly. The monthly line starts at zero and accelerates. They all hit the same target at age 65.
Notice how the lump-sum line is already above zero on day one — that's because it's a single deposit that's been working from the start. The monthly and annual lines have to climb from nothing.
The cost of waiting
Every year you wait to start is a year stripped off the runway. The required monthly contribution doesn't go up by a little — it goes up by a lot, because you have fewer years for compounding to carry the load.
Waiting 5 years means the monthly check has to grow by $27 for the same $1,000,000 target. The day of birth is the cheapest day of the rest of their life to start.
The millionaire table
Here's what it takes to land at $1M, $2M, $3M, $4M, or $5M by age 65 at a 7.0% return — as a one-time check at birth, a monthly contribution, or an annual contribution. Drag the sliders above and the whole table redraws.
| Target nest egg | One-time at birth | Monthly contribution | Annual contribution |
|---|---|---|---|
| $1,000,000 | $10,708 | $63/mo | $872/yr |
| $2,000,000 | $21,416 | $126/mo | $1,744/yr |
| $3,000,000 | $32,123 | $189/mo | $2,616/yr |
| $4,000,000 | $42,831 | $253/mo | $3,488/yr |
| $5,000,000 | $53,539 | $316/mo | $4,360/yr |
How to actually do this
Three moves, none of them complicated. The hard part is starting; the easy part is everything that comes after.
Open a custodial Roth IRA the moment they have earned income (babysitting, modeling, even chores you pay for). Until then, a 529 for education or a UTMA brokerage for general use.
Set up a recurring transfer on payday. The money leaves before you can touch it, before you can talk yourself out of it.
Tell relatives: birthday and holiday cash goes into the account, not into another plastic dinosaur. They get to feel generous; the kid wakes up rich.
Your numbers, in one sentence
A $10,708 check at birth — or $63 every month for 65 years — becomes $1,000,000 by their 65th birthday at a 7.0% real return.
Now find a place to park it
The investing happens in a brokerage. But a high-yield savings account or a CD is the right home for the cash you're staging up — and a great way to teach a kid what compound interest feels like in real time.