The Age Requirement to Invest in Stocks: A Complete Guide for Young Investors

Starting to invest early is one of the smartest financial decisions you can make. The math is simple: the more time your money has to grow, the more powerful compound growth becomes. But before you dive in, you might be wondering—how old do you have to be to invest in stocks? The answer isn’t as straightforward as you’d think, so let’s break it down for you.

Beyond just understanding the age requirements, we’ll explore the types of investment accounts available for minors, which investments make the most sense, and why getting started young can transform your financial future.

Investment Age Requirements for Minors

The Official Legal Minimum Age to Invest

Here’s the straightforward answer: you must be at least 18 years old to open and manage an individual brokerage account completely on your own. If you’re under 18 and want to invest in stocks, bonds, or mutual funds independently, you’re out of luck for now.

But here’s the good news—being underage doesn’t mean you’re locked out of the investment world. Minors can invest through several account structures with the help of a parent, guardian, or trusted adult. The key difference among these accounts is whether you just own the investments, or whether you also get a say in making investment decisions.

How Parents and Guardians Can Help

One account type gives minors true ownership and an equal voice in investment choices. The other account types put full decision-making power in the hands of an adult, though that adult can absolutely involve you in those decisions and teach you as you learn.

Let’s explore the three main account types that make the most sense for young investors:

Best Investment Account Types for Teens

Type 1: Jointly Owned Brokerage Accounts

Account ownership: Both the minor and adult own it
Investment decision-making: Both can participate
Minimum age requirement: Varies by provider, but typically no age limit

A joint brokerage account is essentially a standard investment account where two or more people share ownership. These accounts are commonly opened between spouses or business partners, but they work equally well for parents and children.

With a joint account, you and your parent (or guardian) both own all the investments inside. Both of you have the right to make trades and investment decisions. As you get older and gain experience, your adult co-owner can gradually give you more control while staying involved.

The flexibility is remarkable. You could start investing at any age—even as a toddler—and your parent could make all the decisions. As you become a teenager, you could take on increasing responsibility. By the time you’re ready to graduate from high school, you might be making 80% of the investment decisions.

Fidelity Youth™ Account: A Standout Option

Fidelity offers the Fidelity Youth™ Account, specifically designed for teens aged 13–17. Here’s what makes it compelling:

• Zero account fees, zero minimums, zero trading commissions on stocks and ETFs
• Invest with just $1 using fractional shares
• Free debit card with no subscription fees or ATM charges
• Educational content through an interactive Learn tab that actually rewards you for completing lessons

Your parent gets the oversight they need through online account access, monthly statements, trade confirmations, and customizable alerts. They can track your debit card transactions and see exactly what you’re buying.

The Fidelity Youth™ app makes money management feel less like homework and more like an actual tool you’ll use. When you complete financial literacy lessons, Fidelity deposits reward dollars directly into your account.

Type 2: Custodial Accounts

Account ownership: The minor owns it
Investment decision-making: The adult makes decisions
Minimum age requirement: Varies by provider, typically no limit

A custodial account is set up by an adult specifically for a minor’s benefit. The adult (called the custodian) opens the account, adds money, and manages the investments. But here’s the important part: you, the minor, actually own everything inside that account.

When you turn 18 or 21 (depending on your state), you gain full control and can do whatever you want with the account. Until then, the adult can only spend money from the account on things that directly benefit you.

Tax advantages make custodial accounts especially attractive. A portion of your investment earnings each year are shielded from taxation, and another portion is taxed at your lower tax rate (not your parent’s rate). This “kiddie tax” benefit can save your family significant money.

There are two types of custodial accounts:

UGMA (Uniform Gifts to Minors Act): Can hold financial assets like stocks, bonds, mutual funds, ETFs, and insurance products. Adopted in all 50 states.

UTMA (Uniform Transfers to Minors Act): Can hold everything UGMA allows, plus real estate, vehicles, and other property. Adopted in 48 states (South Carolina and Vermont don’t use it).

Acorns Early: Investing Made Automatic

Acorns takes a different approach to custodial investing. The platform automatically rounds up your purchases to the nearest dollar and invests the difference. Buy a $2.60 coffee? Acorns rounds it to $3 and invests the extra 40 cents.

Users typically see about $30 per month invested this way—which adds up over years.

Acorns Early (available with the Premium tier at $9/month) lets you open a custodial account and automate investing on your child’s behalf. The platform handles all investment decisions while your money grows tax-deferred.

Type 3: Custodial Roth IRAs

Account ownership: The minor owns it
Investment decision-making: The adult makes decisions
Minimum age requirement: None theoretically; providers may set minimums

Here’s an opportunity many teens don’t realize exists: if you earned money through work—whether that’s a summer job, babysitting, tutoring, or freelancing—you can open a Roth IRA.

For 2026, you can contribute up to $7,000 per year to a Roth IRA (or your total earned income for the year, whichever is less). Since you’re likely in a low tax bracket as a teen, this is perfect. You contribute after-tax dollars now, and then your money grows completely tax-free. When you withdraw in retirement, you pay zero taxes.

The real magic? Decades of compound growth. A $7,000 contribution at age 16 could grow to over $500,000 by age 65 (assuming average market returns).

E*Trade for Custodial IRAs

E*Trade offers custodial IRA accounts for minors under 18 with earned income. You get access to thousands of stocks, bonds, ETFs, and mutual funds. E*Trade also provides its Core Portfolio robo-advisory service if you want recommendations instead of picking investments yourself.

The platform offers zero-commission stock and ETF trading, plus educational resources including articles, videos, live webinars, and monthly classes.

Investment Options Suited for Young Investors

Young investors have a major advantage: time. Because you won’t need this money for 20, 30, or even 50+ years, you can embrace growth-oriented investments rather than playing it safe.

Individual Stocks

When you buy individual stocks, you’re purchasing a tiny ownership stake in a company. If the company thrives, your stock typically grows in value. If it struggles, your stock may decline.

The excitement of individual stock investing is real—you’re not just blindly hoping for gains. You can research companies, follow news updates, and discuss your picks with friends. This active engagement often leads to better financial habits long-term.

Mutual Funds

A mutual fund pools money from many investors to buy dozens, hundreds, or even thousands of stocks (or bonds, or other investments) at once. Instead of buying one company, you own a piece of many companies.

This diversification matters. If you invest $1,000 in Stock X and it tanks, you’ve lost significantly. But if you invest $1,000 in a mutual fund holding Stock X plus hundreds of others, and Stock X drops, the damage is absorbed across your entire portfolio.

Mutual funds do charge annual fees (pulled from performance), so compare options to ensure you’re getting value. But for many young investors, the reduced risk is worth the cost.

Exchange-Traded Funds (ETFs) and Index Funds

ETFs work like mutual funds—they’re diversified collections of investments—but they trade throughout the day like stocks, whereas mutual funds only settle once daily.

Most ETFs are passive or index funds, meaning they simply track a predetermined collection of investments (called an index) rather than relying on active managers to pick winners and losers. Index funds typically cost less than actively managed funds and often outperform them.

For a teen with $1,000 to invest across a wide range of stocks and bonds, an index-based ETF is often the smartest starting point.

Why Starting Your Investment Journey Early Matters

The Power of Compound Growth

Whether you’re investing in a joint account, custodial account, or Roth IRA, compounding is your superpower. Here’s how it works:

Invest $1,000 at 4% annual return. In year one, you earn $40, bringing your balance to $1,040. In year two, you’re earning 4% on $1,040, not just your original $1,000. You earn $41.60, bringing your balance to $1,081.60.

That extra $1.60 in year two might seem trivial. But over 30 years, that compounding turns into extraordinary wealth. A $1,000 investment becomes $3,243 without any additional contributions.

Now imagine investing regularly. Contribute $100 monthly starting at age 16, and by age 65, you could have over $2 million (assuming 8% average annual returns). Start at 26 instead? You’d have around $900,000. That 10-year delay costs you over $1 million.

Building Habits That Last a Lifetime

If you want enough money for major life goals—a car, a home, a comfortable retirement—you need to invest. That starts with developing strong saving habits now.

Once you’re an adult, investing should become as routine as paying rent or buying groceries. The habits you build as a teen directly shape your financial future. Teens who invest tend to stay investors. They understand risk, understand markets, and make smarter financial decisions.

Weathering Market Cycles

Stock markets don’t rise in straight lines. They cycle through periods of growth and periods of decline. Your financial situation will also change—some years you’ll earn more and spend less; other years the opposite occurs.

Young investors have the advantage of time to weather these cycles. If the market drops 20%, a 16-year-old investor can wait 10 years for recovery without touching the account. A 60-year-old can’t. This flexibility gives you options and reduces the panic-selling that hurts so many investors.

Other Investment Accounts for Kids (Opened by Parents)

529 College Savings Plans

A 529 plan is a tax-advantaged account designed to save for education expenses. Qualified expenses include college tuition, fees, technology (computers, software), room and board, books, and trade school costs.

The adult opens and controls the account. Contributions are made with after-tax dollars, but funds grow completely tax-free when used for education. Any withdrawals for non-qualified expenses trigger taxes plus a 10% penalty (with certain exceptions).

If your child decides college isn’t the path, you can change the beneficiary to another family member without tax consequences.

Coverdell Education Savings Accounts (ESA)

An ESA (also called a Coverdell or education IRA) is a custodial account for saving on K-12, secondary, or college expenses.

• Maximum contribution: $2,000 per student per year (until age 18)
• Income limits: Single filers under $95,000 MAGI; married filing jointly under $190,000 MAGI
• Funds must be used for qualified education expenses before age 30
• Funds grow tax-free

Parent’s Standard Brokerage Account

Parents can simply use their own brokerage account to invest for their kids. The benefits? Complete flexibility—no contribution limits, no account minimums, and money can be used for anything.

The downside is minimal tax advantages compared to 529 plans or ESAs.

Bottom Line: When Can You Start Investing?

To summarize: You must be 18 years old to independently open and manage investment accounts. However, there are multiple pathways for younger investors:

• Joint brokerage accounts let you and a parent both own and make investment decisions
• Custodial accounts let you own investments while an adult manages them, with full control transferring at age 18 or 21
• Custodial Roth IRAs are available if you’ve earned income through work

The minimum age to invest isn’t really the question—it’s whether you’re ready to take action. With the right account structure and a supportive adult, you can start building wealth today. And as the numbers show, every year you wait costs you thousands of dollars in lost compounding growth.

The best time to start investing was yesterday. The second-best time is right now.