A cash account is a brokerage account where you must pay in full, with money already on deposit, for every security you buy. You cannot borrow from the broker, which means the most you can lose is what you put in. Most brokerages open a cash account by default, and for anyone investing without a plan to use leverage, it is the standard choice.
How a Cash Account Works
The rule is straightforward. Under Federal Reserve Regulation T, a broker can execute a purchase in a cash account 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 against your holdings. No credit line from the broker.
That full-funding requirement caps your downside at the money you deposited. Put in $10,000, invest it all, and the worst outcome is losing that $10,000. You will never owe the brokerage more. For first-time investors and long-term buy-and-hold portfolios, that predictability is the point.
What You Can Trade
Stocks, bonds, mutual funds, and exchange-traded funds all fit inside a cash account. Regulation T also permits covered option transactions, meaning you can sell covered calls against shares you already own or cash-secured puts where the cash to buy the shares is set aside.1eCFR. 12 CFR 220.8 – Cash Account Naked options and margin-dependent spreads are not available.
Short selling is also off the table. Shorting requires borrowing shares from the broker, 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, you need a margin account.
Cash Account vs. Margin Account
The dividing line is leverage. A margin account lets you borrow from the broker to buy more securities than your cash alone would cover. A cash account does not.
Margin amplifies both gains and losses, and if a margined position drops far enough, the broker issues a margin call demanding more money or a sale of holdings. Miss the call and the broker can liquidate positions on its own. None of that applies in a cash account, because there is no borrowed money to reclaim. Margin loans also accrue interest daily; a cash account has no borrowing costs because there is no borrowing.
The T+1 Settlement Cycle
When you sell a security in a cash account, the proceeds do not appear as spendable cash instantly. Most U.S. stock and ETF trades now settle on a T+1 basis, one business day after the trade date, a cycle that took effect on May 28, 2024.3Securities and Exchange Commission. Shortening the Securities Transaction Settlement Cycle
In practice, sell on Monday and the cash settles Tuesday, at which point you can withdraw it or use it for a new purchase. For a long-term investor the wait is invisible. For someone trying to trade actively, it is the constraint that shapes everything else about the account.
Trading Violations to Avoid
Because settled cash is the only cash that fully counts, cash accounts have two violations that trip up active traders. Both carry the same penalty: a 90-day restriction.
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 spent money that had not yet arrived, then closed out before it did. Three good faith violations inside a rolling 12-month period will restrict the 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 requires the broker to freeze the account’s ability to delay payment for 90 calendar days when this happens.1eCFR. 12 CFR 220.8 – Cash Account During a freeze you can still buy, but you have to pay with settled cash on the trade date, with no grace period.5Investor.gov. Freeriding
The way to avoid both is to buy only with settled cash. 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, which imposes a $25,000 minimum equity requirement on anyone who day trades four or more times in five business days, applies specifically to margin accounts.6FINRA. FINRA Rule 4210 – Margin Requirements Cash accounts sit outside the rule’s scope.
That is not a loophole. FINRA states that day trading in a cash account is not permitted; securities must be paid for in full before they are sold.7FINRA. Day Trading T+1 settlement enforces this mechanically. The same dollars can fund at most one round-trip trade per business day, and pushing past that limit lands you in good faith or free riding territory.
Cash Accounts and IRAs
Most IRAs operate as cash accounts because the tax code makes it very hard to do anything else. Using an IRA annuity contract to secure a loan strips the entire contract of its tax-advantaged status as of the first day of that tax year, and pledging an IRA account as collateral treats the pledged portion as a distribution.8Office of the Law Revision Counsel. 26 USC 408 – Individual Retirement Accounts Traditional margin borrowing inside an IRA is effectively prohibited.
Some brokerages offer “limited margin” for IRAs, but the name is misleading. It does not let you borrow money. It lets you trade with unsettled funds so you avoid good faith violations while T+1 runs its course.9Fidelity. What Is Limited Margin Trading? You still cannot short sell, write naked options, or carry a debit balance.
Uninvested Cash, Sweeps, and Protection
Cash that sits in your brokerage account without being invested is typically enrolled in a sweep program that moves it into an interest-bearing option, usually a bank deposit account or a money market fund.10Investor.gov. Cash Sweep Programs for Uninvested Cash in Your Investment Accounts Brokerages are not required to pay interest on uninvested cash, so the rate depends on the firm and the sweep option you are enrolled in.
Where the sweep sends your cash also determines how it is insured. Cash swept into an FDIC-insured bank deposit account receives FDIC coverage up to $250,000 per depositor at each participating bank, and some brokerages spread cash across several banks to extend that coverage. Cash placed in a money market fund is not FDIC-insured, because money market funds are securities rather than bank deposits and can technically lose value.10Investor.gov. Cash Sweep Programs for Uninvested Cash in Your Investment Accounts
The brokerage itself is covered separately. The Securities Investor Protection Corporation protects securities and cash held at a member brokerage up to $500,000 per customer, which includes a $250,000 sublimit for cash claims.11Securities Investor Protection Corporation. What SIPC Protects SIPC only helps if the brokerage fails; it does not cover investment losses from falling prices or bad picks.12Securities Investor Protection Corporation. Introduction to SIPC For most investors, that means invested assets sit under SIPC at the broker and swept cash sits under FDIC at a partner bank, with coverage flipping depending on where the money is at any given moment.