How Much Could Your Child Have by Age 18? Enter your numbers and see the power of compound growth inside a 530A Trump Account.
By Nathaniel Parker · Millionaire Kid Blueprint · Return to Homepage
The 530A Trump Account is the most powerful children's investment vehicle available today — it offers tax-deferred growth, a free $1,000 government seed money for newborns, and up to $5,000/year in family contributions. This calculator shows you exactly what any starting amount and monthly contribution will grow to by age 18.
Quick examples using this calculator:
New to 530A accounts? Start with What Is a 530A Account? or learn how much to invest monthly for your child →
A 530A account invested in a low-cost S&P 500 index fund from birth has the potential to grow into six figures by the time your child turns 18 — and much more if left invested into adulthood. Use this calculator to see exactly what your strategy could build.
Enter 1000 to use the free government seed money
Click any scenario to instantly calculate:
18 years @ 10% → ~$67,000
18 years @ 10% → ~$130,000
18 years @ 10% → ~$266,000
65 years @ 10% → ~$10M+
This calculator uses the standard compound interest formula with monthly contributions: FV = P(1+r/n)^(nt) + PMT × [((1+r/n)^(nt) - 1) / (r/n)]
Where P = initial investment, r = annual interest rate, n = compounding periods per year (12), t = time in years, and PMT = monthly contribution. Results assume consistent monthly contributions and a fixed annual rate of return — actual investment returns will vary.
The calculator does not account for inflation, taxes on withdrawal, state tax differences, or changes in contribution amounts over time. For a full strategy including tax considerations, see our 530A Tax Benefits Guide.
The S&P 500 has historically averaged approximately 10% nominal annual returns. For conservative planning, use 7-8%. For a middle-ground scenario, use 9-10%. Only use higher rates if you have specific reasons to expect above-average returns.
Yes — enter $1,000 in the "Initial Investment" field to model the free government contribution. For children not eligible for the seed money, enter $0 or your actual starting contribution.
The maximum individual contribution is $5,000/year, which equals approximately $417/month. Employer contributions of up to $2,500/year are separate. See our full Contribution Limits Guide.
Set "Years to Grow" to 65 to see how a 530A account — which converts to a traditional IRA at age 18 — could grow if your child keeps it invested through retirement. This models the full lifetime compounding potential of starting early.
Download the free Millionaire Kid Blueprint Guide — your complete 530A action plan, contribution tracker, and step-by-step wealth roadmap.