The earned-income Roth IRA for kids: documentation, mechanics, and the math

The most powerful financial move available to a child isn't a savings bond or a college fund — it's a Roth IRA funded with their own earned income. The reason is pure math: money contributed at age 12 or 15 has fifty years to compound tax-free, which produces outcomes no later contribution can match. But the whole strategy rests on one requirement that trips families up: the child must have genuine earned income, properly documented. Get the documentation right and you've unlocked the best tax deal in the code for your kid. Get it wrong and you've created an audit problem. This article is about getting it right.

The core rule: earned income, and only earned income

A Roth IRA contribution requires earned income — money paid for work performed. The child can contribute up to the amount they earned in the year, capped at the annual IRA limit ($7,000 in recent years, which almost no kid will hit). If a child earns $2,000, the maximum contribution is $2,000. The critical distinction: earned income is money from working, not money from existing. Allowance, birthday gifts, and investment income do not count, no matter how they're labeled. The IRS cares about one thing — was this real pay for real work — and your documentation exists to answer that question convincingly.

What counts, and what doesn't

• Counts: W-2 wages from any employer — the grocery store, the pool, the ice cream shop. This is the cleanest case because the paperwork generates itself.
• Counts: documented self-employment — babysitting, lawn mowing, tutoring, dog walking, reselling — provided it's real work at reasonable rates, tracked and reported.
• Counts: wages from a legitimate family business, at a reasonable rate for real work actually performed, with payroll records. Paying a teen to run the business's social media is fine; paying a toddler as a 'model' with no real service is audit bait.
• Doesn't count: allowance, chore money that's really allowance, birthday and holiday gifts, or investment gains. Generosity and existing aren't earned income.
• The working rule: if the income was real enough to report to the IRS, it's real enough to back a Roth contribution — and reporting it is exactly what builds your proof.

The parent cheat code: whose dollars fund it

Here's the move that makes this strategy realistic: the money that goes into the Roth doesn't have to be the money the child earned. If your teen earns $3,000 mowing lawns and spends most of it, you (or a grandparent) can contribute up to $3,000 to their Roth from your own pocket while they keep their earnings. The IRS only checks that the child had at least that much earned income for the year — it doesn't trace which specific dollars were contributed. This turns the Roth into a tax-free gift that compounds for five decades, and it's completely legitimate. A match structure works beautifully: for every dollar the kid contributes, you add one, so contributing feels like winning.

The math that should motivate every parent

The same $2,000 is worth roughly six times more contributed at 14 than at 35. That's the entire argument in one chart: a child's contribution isn't competing on size — it's competing on time, and time wins by a landslide. This is also why the account matters more than the amount. A modest $500 in a kid's Roth beats a larger sum sitting in checking waiting for the 'right time,' and the gap widens every year the money stays invested. For a kid with a 50-year runway, the correct investment is simple: a single total-stock-market index fund, 100% equities, dividend reinvestment on.

The mechanics: opening and funding it

1. 1
   Total and confirm the year's earned income

   Add up W-2 wages plus documented self-employment earnings. The contribution ceiling is that number or the annual IRA limit, whichever is smaller. Keep the pay stubs or the income log as proof.

2. 2
   Open a custodial Roth IRA

   Fidelity, Schwab, and Vanguard all offer them online in about fifteen minutes, no minimum. A parent opens and controls it until the age of majority, when it transfers to the child.

3. 3
   Fund it from any pocket, by the deadline

   The child's money, a parent's match, or a grandparent's gift all work. Contributions for a given tax year can be made until the April filing deadline of the next year.

4. 4
   Invest it — don't leave it in cash

   Contributions sit as cash until you buy something. Buy one total-market index fund with 100% of the balance and turn on dividend reinvestment. Then leave it alone.

5. 5
   Make it an annual ritual

   Tie the contribution to the W-2 or the income log each January. Five or six repetitions and both the habit and six figures of future money are locked in.

Answering the kid's obvious objection

Every teen asks the same reasonable question: 'why would I lock money away for fifty years when I want a car now?' The honest answer is that it isn't either/or — it's a split. A teen earning $3,000 a summer might route $2,000 to the car fund and $1,000 to the Roth, especially with a parent match sweetening the Roth side. The car buys mobility at 17; the Roth contribution, left alone, buys something larger and stranger — roughly $58,000 of age-65 money per $1,000 contributed at 15, at a 9% return. Framed as buying two things with one summer's work, the resistance usually evaporates. And because contributions can always come back out, the 'locked away' framing was never quite true anyway.

The bottom line

A kid with real, documented earned income can open a Roth IRA that will out-compound anything they do later, and a parent match plus family funding makes it painless to fill. Keep a clean paper trail — pay stubs for jobs, a simple log for side work — contribute from whatever pocket makes sense, buy one index fund, and repeat every year there's income. The contributions can always be withdrawn if life demands it, so the downside is capped and the upside is a six-figure head start. It's the closest thing to a financial cheat code that exists for young people. Use it.