About Family Money Math

Family Money Math builds free calculators for the money decisions families face, especially when new rules make the right choice unclear. Our first tools cover Trump Accounts and 529 plans, created by laws passed in 2025 and 2026.

How we work

• Every calculator is built from official sources, such as IRS notices, regulations and form instructions, and lists them on the page.
• We show the date each page's rules were last checked, and we update pages when the rules change.
• We explain the assumptions behind every result, so you can see what the number depends on.

What we are not

We are not financial advisers, tax preparers or a bank, and we don't sell financial products. Our results are estimates for education. For decisions about your own money, talk to a qualified professional.

Get in touch

Found an error or want a calculator we don't have yet? Email us at [email protected].