Birth Toddler Kids Tweens & Teens11–18 College & Grads Young Adults Adults & Married Mid-Life Pre-Retirement Retired Legacy

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Birth Toddler Kids Tweens & Teens11–18 College & Grads Young Adults Adults & Married Mid-Life Pre-Retirement Retired Legacy

6 min read

Custodial Brokerage Accounts

Real stocks, real gains, real learning — a custodial brokerage account turns your tween into an investor with decades of compound growth ahead.

Why Start Investing at 12?

A tween who starts investing has 50+ years of compound growth ahead. $1,000 invested at 12 at 8% average returns becomes $37,000 by age 55 — without adding another penny.

$1K

Starting at Age 12

Initial investment

$37K

Adding $100/month

By age 30 (8% return)

$15K

Same $ Starting at 25

Starting late costs $22K

$1,000 + $100/month Starting at Age 12 (8% return)

Portfolio Value

Best Custodial Brokerage Platforms

Platform Comparison

Feature	Platform	Best For
Fidelity Youth	Ages 13-17 own account	Full brokerage, no parent co-sign at 13
Schwab Custodial	UTMA brokerage	Full stock/ETF access, great research
Vanguard Custodial	UGMA/UTMA	Low-cost index funds, long-term focus
Greenlight Invest	Ages 8+, parent-approved	Simplified UI, parent approves each trade
Stockpile	Gift cards for stocks	Fractional shares, visual learning

What to Invest In

Total Market ETF (VTI/ITOT)

Own a tiny piece of every US company. Simplest one-fund portfolio.

Companies They Know

Nike, Disney, Apple — owning brands they use makes investing real.

Fractional Shares

Can't afford $200 Amazon? Buy $25 worth. Most platforms support this.

Target Date Fund

Set-and-forget option that auto-rebalances as they grow older.

Teaching Moment: Diversification

When a single stock drops 20%, it hurts. When their total market ETF drops 2%, it's a lesson in why you don't put all eggs in one basket. Let them experience both.

Tax Considerations

Kiddie Tax Rules

First $1,250 of investment gains is tax-free. Next $1,250 taxed at child's rate (10%). Above $2,500 taxed at parent's rate. For most tweens' accounts, taxes are minimal.

FAFSA Impact

Custodial accounts count as student assets on FAFSA (assessed at 20% vs 5.64% for parent assets). Consider this if college is 5+ years away and financial aid is a factor.

Key Takeaways

Starting at 12 gives 50+ years of compound growth potential
Fidelity Youth (age 13+) lets teens trade independently
Start with total market ETFs, add individual stocks for learning
First $1,250 of gains is tax-free (kiddie tax threshold)
Real investing experience is the best financial education possible

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