The ground rules of honest projection

Every number on this page comes from compound growth at three flat annual rates — 4% (conservative), 7% (moderate/historical-real-ish), 10% (historical nominal average) — applied to money in the account’s broad U.S. index funds, whose fees are small enough to ignore and whose taxes are deferred until withdrawal decades away. Real markets deliver returns in violent zigzags, not flat lines; flat rates are the honest simplification that makes scenarios comparable, and the range across 4–10% is doing the humility work.

Two more cards face-up. Inflation: dollar figures below are nominal — an $46,000 balance in 2044 buys less than $46,000 does today; mentally haircut long-horizon numbers accordingly, or read the 4% column as a rough real-terms proxy. Sequence risk: an account can absolutely sit below its deposits for years mid-journey; the projections describe destinations, not the road. With that said — the arithmetic.

Scenario one: the seed alone (the political number)

A $1,000 deposit at birth, never joined by another dollar, reaches roughly $2,000 at 4%, $3,400 at 7%, or $5,600 at 10% by age 18. Verdict without spin: meaningful, not transformative — a used car, a semester’s books, a serious emergency fund for a 18-year-old; not tuition, not a down payment. Anyone selling the seed alone as a nest egg is overselling; anyone waving it off as nothing is ignoring that it cost families zero.

The seed’s real character shows at the longer horizon. Converted to the young adult’s traditional IRA at 18 and simply left alone to 65, that same lonely $1,000 becomes roughly $21,000 at 4%, over $100,000 at 7%, and approaches half a million at 10% — nominal dollars, decades of inflation applying, and still: the government handed every eligible baby a lever whose length is 65 years. The seed was never the gift; the head start was.

Scenario two: the seed plus a real family’s contributions

Add what an ordinary committed household can automate. $50/month from birth: roughly $17,600 / $24,300 / $34,300 by 18 at 4/7/10%. $100/month: roughly $33,000 / $46,000 / $66,000. Maxing the $5,000 cap (~$417/month): roughly $128,000 / $180,000 / $260,000 by 18 — down-payment and business-seed territory, from a program critics called symbolic.

Notice the ratio that should drive family strategy: at every return rate, contributions dwarf the seed — the $1,000 is under 3% of the maxed-cap outcome. The program’s deposits open the account and start the clock; the compounding that changes a life is overwhelmingly fed by the employer pipe, the relatives, and the household’s automated transfers. The calculator runs your exact amounts, birth year, and scenario mix in sixty seconds — these tables are its appetizer.

The comparisons that make the numbers land

Against the savings account: the same $1,000 at a generous 2% bank rate reaches ~$1,430 by 18 — likely a purchasing-power loss — versus the index projections above; the full comparison belabors this properly. Against starting late: the identical $100/month begun at age 6 instead of birth lands near $29,000 instead of $46,000 at 7% — six years of delay costs more than a third of the outcome, which is this site’s entire urgency argument in one sentence.

Against the cash-out at 18: the young adult who liquidates a $46,000 conversion-day balance pays ordinary income tax plus penalty on the taxable portion and surrenders the second, larger compounding leg — the same balance left riding to 65 at 7% passes a million nominal dollars. Print that one for the eventual 18-year-old; the age-18 guide builds the whole handover conversation around it.

Using the projections without fooling yourself

The projections’ correct uses: choosing a contribution level (see what $50 vs $100 buys and pick what survives your budget), settling the versus-savings-account question forever, motivating the early start, and scripting the eventual conversation with an 18-year-old. Their incorrect uses: treating any single column as a promise, timing markets around them, or funding the account with dollars whose loss the household couldn’t absorb — the risk talk is a prerequisite, not a footnote.

And the projection that requires no return assumption at all: unclaimed money compounds at exactly zero. Millions of eligible children currently hold that portfolio. Whatever scenario your family believes — the cautious 4% or the historical 10% — every one of them beats the national default of never opening the account. Claim the seed via the opening guide, automate whatever monthly number is honest for your budget, and let the arithmetic do the rest of its patient work.