A brokerage account is an arrangement between you and a licensed brokerage firm that lets you buy and sell investments like stocks, bonds, and funds. The firm holds your assets, records your transactions, and routes your orders to exchanges or market makers on your behalf. You keep beneficial ownership of everything inside the account. How a brokerage account works in practice depends on four things: the type of account you open, whether you fund it with cash or borrowed money, the fees and taxes it generates, and the protections that sit behind it.
The Main Types of Brokerage Accounts
The first choice you make shapes almost everything else.
A standard taxable brokerage account is the most flexible. You can deposit and withdraw money whenever you want, with no annual contribution cap and no penalties for pulling funds out early. The tradeoff is that you owe taxes on dividends, interest, and capital gains each year. Taxable accounts come as individual accounts held by one person, or joint accounts shared by two or more owners.
Retirement accounts are brokerage accounts wrapped in a tax shelter. A Traditional IRA lets you deduct contributions from your taxable income now and pay taxes when you withdraw the money in retirement. A Roth IRA flips that: you contribute after-tax dollars, but qualified withdrawals in retirement are tax-free. For 2026, you can contribute up to $7,500 across all your IRAs, or $8,600 if you’re 50 or older.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Roth eligibility phases out at higher incomes. For 2026, single filers begin losing eligibility at $153,000 in modified adjusted gross income and are fully phased out at $168,000. Married couples filing jointly hit the phase-out between $242,000 and $252,000.2Internal Revenue Service. Retirement Topics – IRA Contribution Limits
Minors can’t own brokerage accounts directly, but an adult can open a custodial account under the Uniform Gifts to Minors Act (UGMA) or Uniform Transfers to Minors Act (UTMA). The adult manages the investments until the child reaches the age of majority, which varies by state. Once the beneficiary hits that age, the assets become theirs to control. These are irrevocable gifts: once the money goes in, you can’t take it back.
Cash Accounts and Margin Accounts
Every brokerage account operates under one of two funding structures.
A cash account requires you to pay the full purchase price of any security upfront. You can only spend the money you’ve deposited. This is the default for most investors and the simpler option.
A margin account lets you borrow from the brokerage to buy securities. Under the Federal Reserve’s Regulation T, brokers can lend you up to 50 percent of the purchase price of eligible stocks for new purchases.3U.S. Securities and Exchange Commission. Understanding Margin Accounts To buy $10,000 worth of stock, you’d need at least $5,000 of your own money in the account. After the purchase, FINRA rules require you to keep at least 25 percent of the current market value of your holdings as equity in the account at all times.4FINRA. FINRA Rules – 4210 Margin Requirements Many brokerages set their own minimums higher than that floor.
If your account equity drops below the maintenance requirement, the broker issues a margin call demanding you deposit more cash or securities. If you don’t act fast enough, the firm can sell your holdings without asking permission to bring the account back into compliance. Margin amplifies both gains and losses, and the interest on borrowed funds eats into returns even when the trade goes your way.
The Day Trading Threshold
Margin accounts trigger a rule that catches many newer traders off guard. If you execute four or more day trades within five business days, and those trades represent more than six percent of your total activity in that period, FINRA classifies you as a pattern day trader.5FINRA. Day Trading Once flagged, you must maintain at least $25,000 in equity in your margin account at all times. Drop below that threshold and you’re locked out of day trading until you bring the balance back up.4FINRA. FINRA Rules – 4210 Margin Requirements The designation tends to stick even during periods when you stop day trading.
What You Can Hold and How Trades Settle
A brokerage account gives you access to most publicly traded financial instruments: common stocks, corporate and municipal bonds, exchange-traded funds (ETFs), mutual funds, and options contracts. Many brokerages now offer fractional share trading, letting you buy a portion of a share rather than the whole thing. Fractional shareholders receive proportional dividends. Own 0.75 shares of a stock paying $10 per share, and you’d get $7.50.6Investor.gov. Fractional Share Investing – Buying a Slice Instead of the Whole Share Voting rights on fractional shares are less consistent: some firms allow proxy voting, others don’t.
When you place a trade, your broker routes the order to an exchange or market maker to find a counterparty. Brokers are required to use reasonable diligence to get you the most favorable price available under the circumstances, a standard known as best execution.7U.S. Securities and Exchange Commission. Regulation Best Execution
Since May 2024, most U.S. securities trades settle on a T+1 basis, meaning one business day after the trade date.8U.S. Securities and Exchange Commission. Shortening the Securities Transaction Settlement Cycle Settlement is when ownership officially transfers and payment finalizes. This matters most for cash account holders: sell a stock on Monday and those funds won’t be available to withdraw or reinvest until Tuesday. Trying to buy new securities with unsettled funds in a cash account can trigger a good-faith violation.
The Costs That Reduce Your Returns
Most major online brokerages have eliminated commissions on stock and ETF trades, but that doesn’t mean trading is free.
Mutual funds and ETFs charge an annual expense ratio, a percentage of your invested assets that covers the fund’s management and operating costs. Passively managed index funds typically charge around 0.03 to 0.20 percent, while actively managed funds can charge 0.50 percent to over one percent.9Charles Schwab. Mutual Fund Fees, Costs and Expense Ratios The difference compounds. On a $100,000 portfolio, the gap between a 0.05 percent and a 0.75 percent expense ratio works out to roughly $700 per year in additional drag.
If you borrow through a margin account, you’ll pay interest on the outstanding loan balance. Rates vary substantially between firms and are typically tiered, with larger loan balances getting lower rates. Interest usually accrues daily, and brokers can change the rate with as little as 30 days’ written notice.10Investor.gov. Investor Bulletin – Interested in Margin? Understand Interest Some firms net cash balances against your margin loan, while others charge interest on the full borrowed amount regardless of cash held elsewhere in your account.
Some brokerages still charge annual maintenance or inactivity fees, though these have become less common. The fee that catches people most often is the account transfer or closure fee, which many firms charge when you move your assets to a competitor. These typically run $50 to $150 per account.
Zero-commission brokerages make money partly through payment for order flow, where market makers pay the broker for the right to execute your trades. This creates a potential conflict: the broker has a financial incentive to route your order to whoever pays the most, not necessarily whoever gives you the best price.11U.S. Securities and Exchange Commission. Special Study – Payment for Order Flow and Internalization in the Options Markets For most small trades in liquid stocks, the price impact is negligible. For larger orders or less liquid securities, it can matter more. Brokerages are required to disclose these arrangements in SEC Rule 606 reports.
How a Taxable Account Is Taxed
A taxable brokerage account creates tax obligations every year you earn dividends, collect interest, or sell investments at a profit.
When you sell an investment for more than you paid, the profit is a capital gain. How much tax you owe depends on how long you held it. Sell something you owned for one year or less, and the gain is short-term, taxed at your ordinary income tax rate, which can run as high as 37 percent.12Office of the Law Revision Counsel. 26 USC 1222 – Other Terms Relating to Capital Gains and Losses Hold for more than one year and the gain qualifies as long-term, taxed at preferential rates of 0, 15, or 20 percent depending on your income.
High earners face an additional 3.8 percent net investment income tax on top of the capital gains rate. The NIIT kicks in when your modified adjusted gross income exceeds $200,000 for single filers or $250,000 for married couples filing jointly.13Internal Revenue Service. Net Investment Income Tax Those thresholds are statutory and don’t adjust for inflation.
Selling a losing investment to offset gains, called tax-loss harvesting, is a legitimate strategy. But the IRS won’t let you claim the loss if you buy a substantially identical security within 30 days before or after the sale.14Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities Sell an S&P 500 index fund at a loss and immediately buy a nearly identical one from a different provider, and the IRS can disallow the deduction. Your broker will flag wash sales on your Form 1099-B, but only for identical securities within the same account. You’re responsible for tracking wash sales across different accounts.
Each January and February, your brokerage sends you and the IRS forms covering the prior year. Form 1099-B reports proceeds from every sale, along with cost basis and whether each gain or loss is short-term or long-term.15Internal Revenue Service. Instructions for Form 1099-B Form 1099-DIV reports dividends received.16Internal Revenue Service. About Form 1099-DIV, Dividends and Distributions Tax-advantaged accounts like IRAs don’t generate annual 1099-B forms for trades made inside the account. The tax event is deferred until withdrawal.
How Your Account Is Protected
The Securities Investor Protection Corporation (SIPC) protects your brokerage account if the firm fails financially. Most U.S. broker-dealers are required to be SIPC members.17Securities Investor Protection Corporation (SIPC). For Investors – What is SIPC? If a member firm goes under, SIPC works to return your securities and cash up to $500,000 per customer, with a $250,000 sublimit on cash.18Securities Investor Protection Corporation (SIPC). What SIPC Protects
SIPC is not the FDIC, and the difference matters. SIPC does not protect you against market losses. If your portfolio drops 40 percent because the market crashes, SIPC won’t make you whole. It also won’t cover losses from bad investment advice or unsuitable recommendations from your broker. Commodity futures, foreign exchange trades, unregistered digital asset securities, and fixed annuities not registered with the SEC all fall outside SIPC coverage.18Securities Investor Protection Corporation (SIPC). What SIPC Protects Many large brokerages carry supplemental insurance beyond the SIPC minimums.
Opening and Funding an Account
Federal regulations require brokerages to verify your identity and understand your financial situation before opening an account. Under FINRA Rule 2090, firms must exercise reasonable diligence to know the essential facts about every customer.19FINRA. FINRA Rules – 2090 Know Your Customer You’ll need to provide your Social Security number, government-issued photo ID, employment information, and a summary of your annual income and net worth. You’ll also complete a suitability questionnaire about your investment goals, time horizon, and risk tolerance, and a W-9 form certifying your taxpayer identification number for IRS reporting.20Internal Revenue Service. Form W-9 – Request for Taxpayer Identification Number and Certification
Online discount brokers offer automated trading tools, low or zero commissions, and self-directed account management. Full-service brokers provide personalized advice and dedicated financial advisors, but charge substantially higher fees, often a percentage of assets under management. For investors comfortable doing their own research and placing their own trades, a discount broker is the more cost-effective choice.
Once approved, you’ll need to deposit money before you can trade. The most common method is an electronic funds transfer through the Automated Clearing House (ACH) network, which links your bank account to your brokerage.21Fidelity. Choose EFT or Bank Wire ACH transfers are free at most firms but can take one to three business days to clear. Wire transfers move money faster, often the same day, but your bank will typically charge a fee for outgoing wires.
Name a Beneficiary
One step most people skip when opening a brokerage account is naming a beneficiary through a Transfer on Death (TOD) designation. A TOD lets your account assets pass directly to the people you name without going through probate.22FINRA. Plan Now to Smooth the Transfer of Your Brokerage Account Assets on Death You keep full control during your lifetime and can change beneficiaries at any time.
A critical detail that surprises many families: a TOD designation supersedes your will. If your will says to split assets equally between two children but your TOD names only one, that one child gets everything in the account. The other has no legal claim, regardless of what the will says.22FINRA. Plan Now to Smooth the Transfer of Your Brokerage Account Assets on Death Reviewing your TOD designations whenever life circumstances change, whether a divorce, a birth, or a death, is one of the simplest and most consequential pieces of financial housekeeping you can do.