Brokerage Accounts
What a brokerage account is, the difference between cash and margin accounts, and what to look for when choosing where to open one.
The short version
A brokerage account holds your investments and cash and lets you buy and sell securities. In a cash account, you pay for everything with your own money. In a margin account, you can also borrow from the firm, which adds risk. When choosing a firm, the things that matter most are costs, what you can invest in, how your assets are protected, and whether the firm is properly registered.
By the end of this lesson, you'll be able to
- Explain what a brokerage account is and what a broker does
- Describe the difference between a cash account and a margin account
- List the main things to compare when choosing a brokerage firm
Why this matters
To own stocks, bonds, or funds, you almost always need an account with a firm that can buy and sell them for you. It's the first practical step in investing, and the choice of firm and account type affects your costs, your options, and your risks for years.
What a brokerage account is
A Brokerage account. An account at a brokerage firm that holds your investments and cash and lets you buy and sell securities. Glossary is an account at a brokerage firm that holds your investments and any cash waiting to be invested. You deposit money, place orders through the firm, and the investments you buy are held in the account in your name. As Exchanges, Buyers, and Sellers covered, the firm acts as your Broker. A firm that buys and sells securities on behalf of its customers. You trade through a broker rather than directly on an exchange. Glossary, sending your orders to the market.
Brokerage firms come in a few broad styles:
- Self-directed firms, mostly online or app-based, where you make your own decisions and place your own trades.
- Full-service firms, where a representative can make recommendations and manage investments for you, usually for higher fees.
- Automated services, sometimes called robo-advisors, which build and maintain a portfolio for you based on answers to a questionnaire.
Many firms offer more than one of these. Hyperion Entities doesn't recommend specific firms, but this lesson covers what to compare.
Cash accounts and margin accounts
The most important choice when opening an account is whether it's a cash account or a margin account.1
- In a Cash account. A brokerage account where you pay for purchases in full with your own money. Glossary, you pay for every purchase in full with money you've deposited. The most you can lose is what you put in.
- A Margin account. A brokerage account that lets you borrow money from the firm to buy securities, using your investments as collateral. Glossary also lets you borrow money from the firm to buy securities, using your investments as collateral. Borrowing magnifies both gains and losses, and you pay interest on the loan.
Many firms offer margin by default or encourage it. For someone learning to invest, a cash account keeps things simpler and limits the damage a mistake can do. Margin gets its own optional lesson at the end of this module: Margin and Short Selling.
What to compare when choosing a firm
| Firm A | Firm B | |
|---|---|---|
| Commission on stock and ETF trades | $0 | $0 |
| Yearly account fee | $0 | $50 |
| Fee to transfer your account out | $75 | $0 |
| Fractional shares | Yes | No |
| Retirement accounts offered | Yes | Yes |
| Default account type | Margin | Cash |
Neither firm is simply "better." Firm A is cheaper to hold an account with but costs more to leave, and it opens accounts with margin unless you choose otherwise. Firm B charges a yearly fee but is simpler. The right choice depends on what matters to you. The point is to compare the full list, not just the headline commission.
A practical checklist:
- Registration. Look the firm up on FINRA's BrokerCheck before sending any money.2 Who Regulates the Markets explains why.
- Protection. Check whether the firm is a SIPC member, which protects customers if the firm itself fails, up to set limits. SIPC doesn't protect against investment losses.3 Keeping Your Account Safe covers this in more detail.
- Costs. Commissions, account fees, transfer fees, and the costs of any funds you buy. Settlement, Fees, and Fractional Shares goes through them.
- What you can buy. Stocks, ETFs, mutual funds, bonds, and whether fractional shares are available.
- Account types. Whether the firm offers the accounts you'll want, including retirement accounts, covered in the next lesson.
- Service and security. How you reach a person when something goes wrong, and what login protections the firm offers.
Key takeaways
- A brokerage account holds your investments and cash, and the firm places your trades.
- A cash account uses only your own money. A margin account lets you borrow, which magnifies both gains and losses.
- Check registration on BrokerCheck and SIPC membership before opening an account.
- Compare the full set of costs and features, not just the commission.
Check your understanding
Alex is opening their first brokerage account and the app defaults to a margin account. Based on this lesson, what's the main thing to understand before accepting?
The defining feature of a margin account is the ability to borrow against your investments. That adds interest costs and can turn a drop in prices into a much larger loss of your own money.
What's next
A brokerage account can also be a retirement account, with very different tax rules. The next lesson, Taxable vs. Tax-Advantaged Accounts, explains the difference.
Go deeper
- Taxable vs. Tax-Advantaged AccountsPart 1: Foundations
- Margin and Short SellingPart 1: Foundations
- How to Check a Financial Professional coming soonEthics, Regulation, and Market Integrity (depth track)
Notes and sources
- FINRA. Brokerage Accounts. Checked 2026-09-26. Back to text
- FINRA. About BrokerCheck. Checked 2026-09-26. Back to text
- Securities Investor Protection Corporation (SIPC). What SIPC Protects. Checked 2026-09-30. Back to text