What a brokerage account actually does

A brokerage account is a holding place where you deposit money, and the brokerage firm uses that money to buy and sell investments on your instruction. You own the investments — stocks, bonds, mutual funds, exchange-traded funds (ETFs) — not the brokerage. The brokerage is the intermediary between you and the markets where those investments trade. When you want to buy 10 shares of a company, you tell your brokerage, they execute the trade, and the shares land in your account. When you sell, the cash from that sale comes back into your account.

The account itself is just a ledger. On one side sits your cash. On the other side sit your holdings. Your brokerage keeps track of both, charges you fees for certain actions (or doesn't, depending on the firm), and sends you statements showing what you own and what it is worth on any given day. The brokerage does not lend you money to invest unless you open a margin account, which is a separate agreement with different rules and risks.

Key Takeaways

  • You deposit cash into your brokerage account, and that cash sits there until you instruct the brokerage to buy an investment with it.
  • The brokerage executes your buy and sell orders during market hours, moving cash out of your account when you buy and moving cash back in when you sell.
  • You own the investments in your account; the brokerage holds them in custody and keeps the records, but they are yours to sell or transfer whenever you choose.
  • Settlement — the actual transfer of ownership and cash between your account and the seller's — takes two business days for stocks and most other securities.
  • Different account types (taxable, IRA, 401k) have different tax treatment and withdrawal rules, but the mechanics of buying and selling work the same way.

How cash enters and leaves your brokerage account

To start investing, you must move money from your bank account into your brokerage account. You do this by linking your bank account to the brokerage and initiating a transfer. The brokerage sends instructions to your bank, your bank verifies the request, and the money moves. This usually takes three to five business days the first time you transfer from a new bank account, because your bank and the brokerage are confirming they are talking to the right people.

Once the cash lands in your brokerage account, it sits there earning little or no interest (though some brokerages now offer cash management features that pay a small rate). When you buy an investment, the brokerage deducts the cost from your cash balance. When you sell an investment, the proceeds add to your cash balance. You can withdraw cash back to your bank account at any time, and that transfer also takes a few business days.

Some brokerages charge a fee to transfer money out; most do not. Some charge a fee to transfer your entire account to a different brokerage; this fee is usually $50 to $100 and is sometimes waived if you move a large balance. Read your brokerage's fee schedule before you open an account if these costs matter to you.

What happens when you buy or sell

When you place a buy order during market hours, your brokerage sends it to an exchange or market maker. The order is matched with a seller, a price is agreed, and the trade is executed — usually in seconds. At that moment, you own the investment, but the cash and the shares have not yet moved between accounts. That is called the trade date.

Two business days later, on the settlement date, the actual transfer happens. Your brokerage receives the shares and moves them into your account. The seller's brokerage receives your cash and moves it out of your account. Until settlement is complete, you own the shares but cannot sell them again — they are in a pending state. After settlement, they are fully yours and you can sell them whenever you want.

Selling works the same way in reverse. You place a sell order, it executes when ready, and two business days later the cash from the sale settles into your account. During those two days, the cash is pending. This two-day settlement window is standard for stocks, ETFs, and most bonds. Some investments, like money market funds, settle the next business day.

Custody, ownership, and what happens if your brokerage fails

Your brokerage holds your investments in custody, meaning they keep the records and the physical or electronic proof of ownership. You do not hold the shares yourself. But custody is not the same as ownership — you own the investments, the brokerage just holds them on your behalf. This matters because if your brokerage goes out of business, your investments do not disappear into the company's bankruptcy.

In the United States, most brokerages are members of the Securities Investor Protection Corporation (SIPC). SIPC protects your account up to $500,000 if your brokerage fails — $250,000 of that for cash and $250,000 for securities. If your brokerage fails and your account is worth more than $500,000, the excess is not protected by SIPC, though you would still own your investments; they would straightforward be transferred to another brokerage as part of the bankruptcy process.

Many brokerages also carry additional insurance beyond SIPC through private insurers. Check your brokerage's website for their specific coverage. This protection does not cover losses from bad investment decisions or market downturns — it only covers the brokerage's failure to return your money and securities.

Fees and how they reduce your returns

Most brokerages no longer charge per-trade commissions for buying and selling stocks and ETFs. This is a recent change; until around 2019, a typical stock trade cost $5 to $10. Now most major brokerages charge zero commission for these trades.

Brokerages still charge fees in other ways. Some charge a monthly account maintenance fee if your balance is below a certain amount, though this is becoming rare. Some charge fees to transfer your account to another brokerage. Some charge fees for certain types of orders, like stop-loss orders or after-hours trades. Some charge fees to speak to a financial advisor or to access premium research tools.

Mutual funds and some ETFs carry internal fees called expense ratios, which are charged by the fund company, not the brokerage. These are deducted from the fund's value every year and reduce your returns. A fund with a 0.5% expense ratio costs you $50 per year for every $10,000 invested. A fund with a 1.5% expense ratio costs you $150 per year for the same $10,000. Over decades, this difference compounds significantly.

How different account types change the rules

The mechanics of buying and selling are the same across all account types, but the tax treatment and withdrawal rules differ. A taxable brokerage account has no restrictions — you can buy, sell, and withdraw money whenever you want, but you owe taxes on any gains you realize when you sell. An IRA (Individual Retirement Account) has contribution limits and withdrawal restrictions, but gains inside the account are not taxed until you withdraw the money in retirement. A 401(k) is an employer-sponsored retirement account with higher contribution limits and employer matching in many cases.

The brokerage does not enforce these rules — the IRS does. If you withdraw money from a traditional IRA before age 59½, you owe income tax on the withdrawal plus a 10% penalty. If you contribute more than the annual limit to an IRA, you owe a 6% excise tax on the excess. Your brokerage will report your activity to the IRS, but they do not stop you from making these mistakes. It is your responsibility to follow the rules.

How to move investments between brokerages

If you want to switch brokerages, you do not have to sell everything and start over. You can transfer your entire account, including all your holdings, to a new brokerage. This is called an ACAT transfer (Automated Customer Account Transfer). The new brokerage initiates the transfer, your old brokerage receives the request, and the transfer usually completes within five to ten business days.

During the transfer, your account at the old brokerage is frozen — you cannot buy or sell. Once the transfer completes, your account at the old brokerage closes and all your holdings appear in your new account at the new brokerage. The investments themselves do not change; only the custodian changes. You still own the same shares of the same companies.

Some brokerages charge a transfer fee ($50 to $100 is typical), though many waive it if you are moving a large balance. Ask your new brokerage whether they will reimburse the transfer fee before you initiate the move.

Frequently Asked Questions

Can I lose more money than I put into a brokerage account?

In a standard brokerage account, no — you can only lose what you invested. If you buy $5,000 worth of stock and it goes to zero, you lose $5,000. You do not owe the brokerage anything. In a margin account, where the brokerage lends you money to invest, you can lose more than you invested if the investments drop sharply and you cannot cover the loan.

What happens to my investments if I do not log in for years?

Your investments stay in your account and continue to exist. You own them whether you check your balance or not. However, if your account becomes inactive (no trades or logins for a long period), some brokerages may charge an inactivity fee or move your account to a dormant status. Check your brokerage's policy on inactive accounts.

Do I have to pay taxes on investments I have not sold yet?

In a taxable brokerage account, no — you only owe taxes when you sell and realize a gain. In a retirement account like an IRA or 401(k), you do not owe taxes on gains until you withdraw the money in retirement. Some investments, like bonds and dividend-paying stocks, generate taxable income even if you do not sell, but you do not owe taxes on unrealized gains.

What is the difference between a brokerage account and a bank account?

A bank account holds cash and is insured by the FDIC up to $250,000. A brokerage account holds investments (stocks, bonds, funds) and cash, and is protected by SIPC up to $500,000. You cannot buy stocks through a bank account; you need a brokerage account. You can withdraw cash from a bank account when ready; cash from a brokerage account takes a few business days to transfer back to your bank.

Can I have multiple brokerage accounts?

Yes. Many people have accounts at multiple brokerages for different purposes — one for retirement savings, one for taxable investing, one for trading options. There is no limit to how many accounts you can open. Each account is separate and protected by SIPC independently, so if one brokerage fails, your other accounts are unaffected.