This guide shows how families are using Roth IRAs, LLCs, and trusts in 2025 to build million-dollar assets for their children — legally and efficiently. 2025 Guide to Legally Making Your Child a Millionaire by 18 It’s not a fantasy. With the right legal tools, your child can become a millionaire by 18 — tax-free. In 2025, high-income families and savvy entrepreneurs are using a mix of trusts, Roth IRAs, LLCs, and custodial strategies to build generational wealth legally and efficiently. Step 1: Open a Roth IRA for Your Child If your child has earned income — even from modeling, online work, or a summer job — you can contribute up to $7,000/year to a minor Roth IRA . With compound interest and index investing, this alone can snowball into six figures. Step 2: Pay Your Child Legally from Your Business Under IRS rules, you can pay your child up to $13,850/year (standard deduction in 2025) tax-free if they work for your business. Assign them roles like video editor, content model, o...