A teenager with a part-time job and a Roth IRA is one of the most powerful combinations in personal finance. Money contributed to a Roth IRA at age 16 has roughly 50 years of tax-free compounding before retirement — turning even modest teenage contributions into significant retirement balances. The mechanics are simple but the rules require attention. Here’s how it works and what parents and teens need to know to open and fund one correctly.
The Earned-Income Requirement
The single most important rule: Roth IRA contributions require earned income. The minor (not the parent) must have legitimate earned income from a job — W-2 wages, self-employment income from babysitting/lawn care/tutoring, or 1099 work. Allowance, birthday gifts, dividends, and investment income do NOT count.
The contribution can come from anyone (parent, grandparent, even the IRS via the Saver’s Credit), but it can never exceed the child’s earned income for that year, up to the annual Roth IRA limit ($7,000 in 2026 for those under 50). If a teen earned $2,000 mowing lawns, the maximum 2026 contribution is $2,000 — not the $7,000 IRA limit.
Why Roth, Not Traditional
Roth and Traditional IRAs differ on when you get the tax benefit. Traditional: deduction now, taxed on withdrawal. Roth: no deduction now, tax-free on withdrawal.
For a minor with little to no income tax to begin with, the upfront deduction of a Traditional IRA is nearly worthless (their tax bill is already low or zero). The Roth’s lifelong tax-free growth, with no required minimum distributions ever, is enormously valuable when the contributions have 40–60 years to compound. The math virtually always favors Roth for minors and young adults.
The Compounding Math
Consider a 16-year-old who contributes $3,000/year (from summer jobs) into a Roth IRA for 5 years — then never contributes again. Assuming a 7% real return:
- Total contributed: $15,000 (across ages 16–20)
- Balance at age 25: roughly $25,000
- Balance at age 45: roughly $96,000
- Balance at age 65: roughly $375,000 — all tax-free
The same $15,000 contributed starting at age 25 (over 5 years from 25–29) would only grow to about $190,000 by age 65. Starting 10 years earlier doubles the eventual balance. This is the compounding head-start that makes minor Roth IRAs so unusually valuable.
How to Open a Custodial Roth IRA
Since minors can’t sign legal contracts in most states, a parent or guardian opens the account as a custodian. It’s officially called a “custodial Roth IRA” but functions identically to a regular Roth IRA. When the child reaches the age of majority (18 or 21 depending on state), the account converts to a standard Roth IRA in the child’s name with full control.
- Choose a brokerage — Fidelity, Schwab, and Vanguard all offer custodial Roth IRAs with no account fees or minimum balances
- Provide the child’s SSN — the account is in the child’s name
- Document the earned income — for W-2 jobs, you have a paystub. For self-employment (babysitting, lawn care, tutoring), keep a simple log of dates, hours, services, and amounts. The IRS doesn’t require this for amounts under filing thresholds, but having documentation matters if questioned
- Make the contribution — can come from any source. A common arrangement: the teen keeps their actual earnings to spend; the parent contributes the equivalent (or less) to the Roth
- Pick investments — for a multi-decade horizon, broad-market index funds (total stock market or S&P 500) are the standard recommendation
The Tax Filing Angle
If the minor’s earned income is below the standard deduction ($15,000 in 2026 for single filers), they generally don’t owe federal income tax. They may or may not need to file a return depending on the income type and amount. Even when no tax is owed, filing a return creates a documented record of the earned income that supports the Roth contribution.
Self-employment income above $400 generally requires filing a return and paying self-employment tax (Social Security and Medicare), which is 15.3% even when no income tax is owed. This is a separate consideration that families weighing self-employed teen work should plan for.
Withdrawing From a Custodial Roth IRA
Roth IRAs have unusually flexible withdrawal rules:
- Contributions can be withdrawn anytime, tax-free and penalty-free — the money the teen actually put in is always available, no questions asked, no penalty
- Earnings withdrawn before age 59½ are generally subject to income tax plus a 10% penalty, with exceptions (first-home purchase up to $10,000, qualified education expenses, disability, etc.)
- After age 59½ and 5 years, all withdrawals (contributions + earnings) are tax-free
This flexibility is significant for a young person: the Roth IRA also functions as a tax-advantaged emergency fund or first-home fund — the contributions are always accessible without penalty. That said, the compounding advantage compounds harder if you leave the money alone.
The Bottom Line
A custodial Roth IRA for a working teenager is one of the highest-leverage moves in personal finance. The earned-income requirement is the gatekeeper, but if it’s met, contributions made in the teen years have 40–50 years of tax-free growth ahead of them — turning modest amounts into substantial retirement balances. Open one at any major brokerage, fund it from any source up to the child’s earned income (or the annual limit), invest broadly, and let compounding do the heavy lifting. Few financial moves give a young adult a head start this large.
This article is educational only and is not financial, tax, or legal advice. Account rules and tax treatment vary by state and change over time. Consult a qualified financial advisor, tax professional, or your state’s 529 plan administrator for guidance on your specific situation.