A cash account is a standard brokerage account in which every purchase must be paid for in full with money already in the account. You cannot borrow from your broker, and your maximum possible loss is limited to what you deposited. Most brokerages open one of these by default for new investors, and it remains the right choice for anyone who wants straightforward investing without the risks that come with borrowed money.
How the Full-Payment Rule Works
The core rule is simple: you need enough cash in the account to cover the full cost of anything you buy. Federal Reserve Regulation T governs this requirement, stating that a broker can execute a purchase only when there are sufficient funds in the account or when the customer agrees to pay in full before selling the security. 1eCFR. 12 CFR 220.8 – Cash Account No loans, no credit lines, no borrowing against your existing holdings.
This full-funding requirement caps your downside at the money you put in. Deposit $10,000 and invest it all, and the worst outcome is losing that $10,000. You will never owe additional money to the brokerage. That predictability is the main reason cash accounts remain popular, especially among first-time investors and people building long-term portfolios rather than trading frequently.
You can hold stocks, bonds, mutual funds, and exchange-traded funds. Regulation T also permits certain covered option transactions, where you already own the underlying shares or have the cash set aside to meet the obligation. 1eCFR. 12 CFR 220.8 – Cash Account That means covered calls and cash-secured puts are on the table. Naked options and complex spreads that require margin are not.
Cash Account vs. Margin Account
The fundamental difference is leverage. A margin account lets you borrow from the broker to buy more securities than your cash alone would support. A cash account does not. Everything in it is bought and paid for with your own money.
Margin amplifies both gains and losses. If a stock bought on margin drops far enough, the broker issues a margin call demanding more cash or a partial sale to bring the account back to minimum levels. Fail to meet the call and the broker can liquidate positions without asking. Cash accounts eliminate that scenario. There is no borrowed money, so there is nothing to call back.
Interest charges are the other cost of margin. Margin loans accrue interest daily, which eats into returns even when your investments are up. In a cash account there are no borrowing costs, because there is no borrowing.
Short selling is also off the table. Shorting requires borrowing shares from the broker and selling them, which by definition needs a margin arrangement. 2U.S. Securities and Exchange Commission. Key Points About Regulation SHO If you want to bet against a stock through a traditional short sale, you need a margin account to do it.
Settlement Timing Shapes How You Use the Account
When you sell a security in a cash account, the proceeds do not land instantly. Since May 28, 2024, most stock and ETF trades in the United States settle on a T+1 basis, meaning one business day after the trade date. 3Securities and Exchange Commission. Shortening the Securities Transaction Settlement Cycle Before that date the standard was T+2.
In practical terms, sell stock on a Monday and the proceeds settle on Tuesday, at which point the cash is available to fund new purchases or to withdraw. This one-day wait rarely matters for long-term investors. It creates a real constraint if you trade actively, because a margin account can sidestep the delay by extending credit against unsettled proceeds. A cash account cannot. You wait.
Trading Violations to Avoid
The settlement delay creates traps for cash-account holders who trade frequently. Two violations matter most, and both carry the same penalty: a 90-day restriction on your account.
Good Faith Violations
A good faith violation happens when you buy a security using unsettled funds and then sell that security before those funds finish settling. You used money you did not actually have yet, and closed the trade before it arrived. Three good faith violations within a rolling 12-month period will restrict your account to trading only with fully settled cash for 90 calendar days. 4Fidelity. Avoiding Cash Account Trading Violations
Free Riding
Free riding is more serious. It occurs when you buy a security and sell it before paying for the original purchase at all. Regulation T addresses this directly: if a security is sold without having been paid for in full, the broker must freeze the account’s ability to delay payment for 90 calendar days. 1eCFR. 12 CFR 220.8 – Cash Account During a freeze you can still buy securities, but you must pay with settled cash on the trade date itself, with no grace period. 5Investor.gov. Freeriding
The simplest way to avoid both violations is to only buy with settled cash. Most brokerage platforms show settled and unsettled balances separately. Check which number you are spending from before placing a trade.
Day Trading in a Cash Account
FINRA’s pattern day trader rule applies specifically to margin accounts. It defines “day trading” as buying and selling the same security on the same day in a margin account, and it labels anyone who does this four or more times in five business days a pattern day trader subject to a $25,000 minimum equity requirement. 6FINRA. FINRA Rule 4210 – Margin Requirements Because the definition is limited to margin accounts, cash accounts fall outside the rule’s scope.
That is not a loophole. FINRA states that day trading in a cash account is not permitted, because securities must be paid for in full before they are sold. 7FINRA. Day Trading The T+1 cycle enforces this mechanically: the same dollars can fund at most one round-trip trade per business day, because they need to settle before you can reuse them. Try to move faster and you land in the good faith or free riding penalties above.
Cash Accounts and Retirement Plans
Most IRAs function as cash accounts by necessity. The tax code treats borrowing against an IRA as a taxable distribution. If you use an IRA annuity contract to secure a loan, the entire contract loses its tax-advantaged status as of the first day of that tax year. If you pledge an IRA account as collateral, the pledged portion counts as a distribution. 8Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts These rules effectively prohibit traditional margin borrowing inside an IRA.
Some brokerages offer what they call “limited margin” for IRAs. This does not let you borrow money. It lets you trade with unsettled funds so you do not run into good faith violations while waiting for T+1 settlement. 9Fidelity. What Is Limited Margin Trading? You still cannot short sell, write naked options, or carry a debit balance. Limited margin is a settlement convenience, not actual leverage.
How Your Cash and Securities Are Protected
Securities and cash held in a brokerage account are protected by the Securities Investor Protection Corporation if the brokerage firm fails. SIPC covers up to $500,000 per customer, which includes a $250,000 limit for cash claims. 10Securities Investor Protection Corporation. What SIPC Protects This protection kicks in only when the brokerage itself becomes insolvent. It does not cover losses from falling stock prices or bad investment decisions. 11Securities Investor Protection Corporation. Introduction to SIPC
Uninvested cash is often handled differently. Brokerages typically enroll customers in a cash sweep program that moves uninvested cash into an interest-bearing option like a bank deposit account or a money market fund. If your cash is swept into an FDIC-insured bank deposit account, it receives FDIC coverage up to $250,000 per depositor at each participating bank. If it is placed in a money market fund, there is no FDIC insurance, because money market funds are securities rather than bank deposits and can technically lose value. 12Investor.gov. Cash Sweep Programs for Uninvested Cash in Your Investment Accounts For most investors with balances well under $500,000, the practical effect is that your assets are protected one way or another regardless of which entity holds them at any moment.