Cash Accounts vs. Margin Accounts

The plain answer

A cash brokerage account lets you buy investments with available cash, while a margin account can let you borrow from the brokerage using eligible holdings as collateral. Margin adds flexibility, but it also adds interest costs, larger possible losses, and the risk that your brokerage sells investments without waiting for your approval. If your plan does not require borrowing or another margin feature, a cash account is the more direct choice.

How it actually works

In a cash account, you must pay for purchases with cash in the account by the required settlement date. Settlement is when the investment and payment officially change hands. Sale proceeds may appear quickly, but using or withdrawing them before settlement can create a rule violation in some situations.

In a margin account, the brokerage may lend you part of a purchase price or let you borrow against eligible holdings. Your investments serve as collateral, which is property the lender can use to recover what you owe. The brokerage charges interest on the borrowed amount.

Feature	Cash account	Margin account
Money used for purchases	Available cash	Available cash and, when approved, borrowed money
Interest on borrowing	None because the account does not lend for purchases	Charged when you carry a margin loan
Loss potential	Limited to the money committed to a standard long investment	Can exceed the cash you contributed
Forced sales	Not for a margin loan	Possible if your equity falls below required levels
Trading restrictions	Cash settlement rules apply	Margin and brokerage risk rules apply

Equity is the value of your holdings minus what you owe the brokerage. A maintenance requirement is the minimum equity the brokerage requires you to keep. If falling prices push your equity too low, the brokerage can issue a margin call asking for more cash or eligible assets.

A margin call is not a promise that you will have time to respond. Under the account agreement, the brokerage may sell holdings to reduce the loan, sometimes without contacting you first. The firm can also raise its own maintenance requirements, which may trigger a sale even if market rules have not changed.

Margin can also support activities such as short selling or certain options strategies. Approval for those features does not make them appropriate for your plan. Each has additional risks and account rules.

What this means for you

Choose based on the features you will use, not the account label presented during sign-up. A cash account fits a plan built around investing money you already have and holding diversified investments. You still need to understand settlement, but you avoid the separate risks of a margin loan.

If you are considering margin, read the interest schedule and margin agreement before enabling it. Know which holdings are eligible, how the firm calculates equity, when it may raise requirements, and whether you could cover a call without selling another asset.

Borrowing magnifies both gains and losses. The investment must earn enough to overcome interest and other costs before the borrowing improves your result. A decline can leave you owing money after positions are sold.

Common mistakes

• Thinking margin is free buying power. It is a loan, and interest can continue while you hold the position.
• Assuming the brokerage must wait for permission to sell. The margin agreement usually gives the firm broad liquidation rights.
• Using borrowed money for a long-term plan without a repayment plan. A market decline and a cash need can arrive together.
• Confusing approval with guidance. Access to margin, short selling, or options says nothing about whether the risk fits you.
• Ignoring cash account settlement rules. Buying and selling with unsettled funds can lead to restrictions even when no margin loan exists.

Related pages

• What is a brokerage account
• How to choose a brokerage
• What is settlement
• When not to optimize