When Can You Start Investing in Stocks? A Complete Guide to Age Requirements and Account Options

Starting to invest early is one of the smartest financial decisions you can make. The younger you begin, the more time your money has to grow through compounding—turning modest investments into substantial wealth. But there’s an important question many young people ask: what is the actual age to invest in stocks, and what are your options before turning 18?

The answer is more nuanced than a simple number. While you must be 18 to open your own brokerage account independently, there are several pathways for younger investors to participate in the stock market with parental guidance. Understanding these options—and knowing why timing matters—can set you on the path to financial independence.

Choosing the Right Investment Account for Your Age and Goals

Before you can start investing in stocks, you need to select the right account type. The choice depends on your age, whether you’ll be making investment decisions yourself, and what level of control you want.

Joint Brokerage Accounts

A joint brokerage account is owned by two people—typically a parent and child—who both have equal rights to the account. What makes this option unique is that you can be any age, and you can actually participate in making investment decisions alongside your parent or guardian. The adult maintains legal responsibility and typically handles tax reporting for capital gains, but you have a voice in what gets bought and sold.

The major advantage here is flexibility. You can invest in virtually any asset: individual stocks, mutual funds, exchange-traded funds (ETFs), bonds, or specialized products. The downside is that there are no special tax benefits, meaning any investment gains will be taxed at regular rates.

Many brokers now offer joint accounts specifically designed for younger investors. Platforms like Fidelity have created dedicated youth accounts (Fidelity Youth™) that feature $0 trading commissions, fractional share investing starting at just $1, and built-in educational resources to help you learn sound money habits while you invest.

Custodial Brokerage Accounts (UGMA/UTMA)

In a custodial account, you own the investments, but an adult (the custodian) makes all investment decisions on your behalf. You can be any age when opening this account. The adult acts as a trustee, managing your assets in your best interest. When you reach the age of majority—typically 18 or 21, depending on your state—you gain full control.

These accounts offer a tax advantage called the “kiddie tax,” which allows a portion of your investment earnings to be taxed at your rate (often lower) rather than your parent’s rate. There are two types:

• UGMA accounts hold only financial assets: stocks, bonds, mutual funds, and ETFs
• UTMA accounts can hold those same investments plus physical property like real estate or vehicles

The tradeoff is control: while you own the assets, the adult decides what to invest in. However, many custodians involve their children in these decisions to build financial literacy.

Custodial Roth IRAs

This account type is powerful for teenagers with earned income—whether from a summer job, babysitting, tutoring, or other work. The current annual contribution limit is based on your earned income (up to $6,500 per year, subject to annual adjustments).

A custodial Roth IRA allows you to invest money you’ve already paid taxes on, and then it grows completely tax-free. When you withdraw the money in retirement, there are no taxes owed. For young people in low tax brackets, this is incredibly advantageous because you lock in the low tax rate today while allowing decades of compounding growth to happen tax-free.

Like custodial brokerage accounts, an adult manages the investments, but you own them. E*Trade and other major platforms offer custodial IRAs specifically for minors, giving you access to thousands of stocks, bonds, ETFs, and mutual funds.

Start Simple: The Best First Investments for Young Investors

Once you’ve opened an age-appropriate investment account, the next step is choosing what to invest in. Young investors should focus on growth-oriented investments because you have decades before needing the money.

Individual Stocks

Buying individual stocks means purchasing a small piece of ownership in a company. If the company performs well, your stock grows in value. If it struggles, the value can decline. Many young investors find stock picking engaging because you can research companies, follow their news, and discuss them with friends. The downside is concentration risk—if you put all your money into one stock and it performs poorly, you could lose significantly.

Mutual Funds

A mutual fund pools money from many investors to purchase a diversified collection of stocks, bonds, or other investments. When you buy into a fund, you’re spreading your investment across dozens, hundreds, or even thousands of securities. This diversification protects you: if one holding drops 20%, its impact on your overall $1,000 investment is minimized because your money is spread across many positions.

Mutual funds do charge annual management fees (deducted from returns), so compare fees across funds. Lower-cost options typically outperform high-fee funds over time.

Exchange-Traded Funds (ETFs) and Index Funds

ETFs are similar to mutual funds but trade throughout the day like stocks, whereas mutual funds only settle once daily. Most importantly, many ETFs are index funds—they passively track a market index rather than being actively managed by human fund managers.

Index funds are ideal for young investors because they offer broad diversification at low cost. A single index fund can give you exposure to hundreds of companies with minimal fees. Starting with index funds and ETFs is a straightforward way to invest $1,000 or more across a wide selection of markets.

The Power of Time: Why Your Age is Your Greatest Investment Advantage

The reason age matters so much comes down to one powerful force: compounding.

How Compounding Works

When you invest money, you earn returns on that initial amount. Those returns then generate their own returns, creating exponential growth over time. Here’s a simple example: if you invest $1,000 in an account earning 4% annually, you earn $40 in year one, bringing your balance to $1,040. In year two, you earn 4% on $1,040 (not just the original $1,000), which equals $41.60. Now your balance is $1,081.60. Year after year, your earnings accelerate.

Over 20 or 30 years, this effect becomes dramatic. Starting to invest in stocks while you’re in your teens means your money can compound for decades, potentially multiplying many times over.

Building Lifelong Financial Habits

Beginning to invest young establishes patterns that carry into adulthood. When you learn to set aside money regularly, track your portfolio, and resist the urge to panic-sell during market downturns, you’re building habits that will serve you for life. These skills become as routine as paying rent or buying groceries once you’re independent.

Weathering Market Cycles

The stock market rises and falls in cycles. A young investor has the luxury of time to wait out downturns and recover from mistakes. If you experience a 20% market decline at age 18, you have 40+ years to recover. At age 50, you don’t have that same cushion. Time is your buffer against volatility.

Additional Account Types for Longer-Term Planning

If you’re a parent planning ahead for your child, other account types exist for specific goals:

529 Education Savings Plans are tax-advantaged accounts designed to save for education expenses (tuition, room and board, qualified technology). Contributions grow tax-free, and withdrawals for education are penalty-free. If your child doesn’t attend college, you can transfer the account to another family member.

Coverdell Education Savings Accounts (ESAs) work similarly but with lower annual contribution limits ($2,000 per year) and income restrictions. Withdrawals must be used for education before age 30.

Parent Brokerage Accounts offer complete flexibility—you can invest any amount toward any purpose using your own account, though there are no tax advantages compared to dedicated education accounts.

Your Action Plan: Taking the First Step at Any Age

The key takeaway is simple: the age to invest in stocks is not a barrier when you understand your options.

If you’re under 18, ask a parent or guardian to help you open a joint account or custodial account. Start small—even $1 in fractional shares counts. Choose index funds or ETFs to keep things simple initially. Focus on building the habit and understanding the fundamentals before getting adventurous with individual stocks.

If you have earned income, a custodial Roth IRA might be your best tool to start investing in stocks while locking in current low tax rates and maximizing decades of tax-free growth.

Remember: the best time to start was yesterday. The second-best time is today. Your age is your most valuable asset when it comes to building wealth through stocks and long-term investing.