Projected value at age 18 (newborn, 18 years of growth)
| Contribution plan | Total you put in | At 5% | At 7% | At 9% |
|---|---|---|---|---|
| Just the $1,000 seed | $1,000 | $2,407 | $3,380 | $4,717 |
| + $50/mo ($600/yr) | $11,800 | $20,130 | $25,207 | $31,728 |
| + $100/mo ($1,200/yr) | $22,600 | $37,853 | $47,035 | $58,739 |
| + $250/mo ($3,000/yr) | $55,000 | $91,024 | $112,517 | $139,772 |
| Max $5,000/yr | $91,000 | $150,102 | $185,275 | $229,809 |
The big takeaway
The headline "$1,000 free" is the hook, but on its own it's modest — about $3,400 by age 18. What actually builds wealth is the contributions you stack on top:
- $100/month — the price of a few takeout dinners — turns into roughly $47,000 by 18 at a 7% return.
- Maxing it ($5,000/yr) reaches about $185,000 — and if your child leaves it invested instead of withdrawing at 18, it keeps compounding for decades.
- Time matters more than amount. Starting at birth gives 18 full years of compounding before adulthood — and potentially 40+ more if untouched.
One caveat worth repeating: this is a traditional-IRA-style account, so the growth is taxed as ordinary income when withdrawn — it's tax-deferred, not tax-free. More on the tax treatment, or see how it compares to a 529 and custodial Roth.
What if the money is left untouched?
The numbers above stop at 18. But the account converts to a traditional IRA then — if your now-adult child leaves it alone, compounding continues. Even the $1,000 seed by itself, untouched to age 59½, grows to roughly $56,000 at 7%. The max-contribution scenario left to retirement reaches into the millions. The calculator shows the "left untouched to 59½" figure for any scenario you enter.