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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsA cash account requires you to pay the full purchase price with settled funds; the broker does not lend you money for the trade. A margin account lets the broker lend against securities in your portfolio, but interest, collateral requirements, forced sales and losses greater than your original contribution become possible. The right choice depends on whether you need borrowing and advanced trading mechanics, and whether you can manage settlement rules and rapidly changing margin requirements.
This guide reflects U.S. rules and official guidance available as of October 13, 2026. Rates, house requirements, cash-netting methods and implementation details vary by brokerage firm, so read your account agreement before trading.
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Cash and margin accounts at a glance
| Decision point | Cash account | Margin account |
|---|---|---|
| How purchases are funded | You pay the entire purchase amount from available cash. The broker does not lend money for the purchase. | The broker may lend against eligible securities held as collateral. |
| Interest | No margin-loan interest when you do not borrow. Other account or transaction charges depend on the firm. | Interest applies to borrowed balances. The rate, accrual method and treatment of cash balances differ by firm. |
| Maximum loss on a fully paid position | The security can fall in value, but a fully paid purchase does not create a margin loan. | Leverage can make losses exceed the amount you initially contributed. You can still owe the loan and interest. |
| Broker intervention | Payment violations can lead to restrictions, including a possible 90-day cash-account freeze for freeriding. | The firm can demand additional collateral and sell securities, potentially without advance notice, if equity is insufficient. |
| Repeated trading | You must track settled cash and payment obligations. Most U.S. equity trades settle T+1. | Borrowing may change buying power and settlement mechanics, but intraday and maintenance requirements apply. |
| Day-trading framework | Payment and settlement rules control what you can buy and sell. Same-day trading is possible when the purchase is fully funded. | As of October 13, 2026, firms are transitioning from the former pattern-day-trader framework to new intraday margin requirements. |
The SEC’s account overview describes the basic account structures. Neither account type makes an investment safe: securities can lose value in a cash account, while margin adds credit risk and the possibility of forced liquidation.
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How a cash account works
You pay before you sell
In a cash account, a purchase must be paid for with cash rather than a broker loan. The important distinction is between cash shown in the account and settled cash that is available to meet a new purchase obligation. Your platform may display separate labels for settled cash, cash available to withdraw and buying power; do not assume they mean the same thing.
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For ordinary U.S. equity trades, FINRA says settlement is generally T+1: the transaction settles on the next business day. Sale proceeds that have not reached settlement are not automatically the same as cash that can safely fund another purchase. Check the settlement date and the broker’s buying-power calculation before placing an order.
When same-day trading can be allowed
A same-day buy and sell is not automatically prohibited in a cash account. The SEC’s instructional example starts with $10,000 in cash, buys $10,000 of ABC on Monday and sells ABC that same day. Because the purchase was funded with cash already in the account, the example says the trades are permitted.
The test is whether the purchase was fully paid, not merely whether the trades happened on one day. Your firm’s order controls can be stricter than the instructional example, so confirm how it defines settled funds and payment deadlines.
Freeriding and the 90-day freeze
Freeriding occurs when you buy a security with sale proceeds that have not settled and then sell the new security before the original sale settles, without adding other cash to pay for the purchase. The SEC’s second example sells settled ABC on Monday, uses the unsettled proceeds to buy XYZ the same day and sells XYZ that afternoon. Because the ABC sale does not settle until Tuesday, the XYZ purchase was not paid for in time; the bulletin identifies this as freeriding.
Freeriding is not permitted under the cash-account rules described in the SEC’s updated cash-account bulletin. A violation may lead to a 90-day freeze. During the freeze, purchases must be fully paid on the trade date. The bulletin was updated August 7, 2026; a broker can also apply its own operational restrictions.
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Cash-account risks that remain
- A security can lose part or all of its value even though you used no leverage.
- An order based on unsettled proceeds can create a payment violation and restrict the account.
- Repeated trading may be limited by the amount of settled cash available, not by the total value shown elsewhere on the statement.
- Options, short sales and other products may require separate approval; account type alone does not guarantee access.
How a margin account works
The account is a secured loan facility
A margin account allows the broker to lend against securities in the portfolio. The securities serve as collateral, and the loan balance is separate from the market value of the holdings. Opening a margin account does not mean every trade uses borrowed money, but the agreement gives the firm rights and imposes requirements that do not exist in a basic cash account.
Interest is charged on the amount actually borrowed. The quoted rate, calculation method, billing date, minimum interest charge and whether cash balances are swept or netted against the loan are firm-specific. The SEC’s margin-interest bulletin advises investors to compare those details in the agreement.
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Leverage magnifies both outcomes
Borrowing lets a smaller cash contribution control a larger position. If the position rises, the percentage gain on your own capital can be larger; if it falls, the percentage loss is also larger and interest continues to accrue. A decline can reduce your equity below the firm’s maintenance requirement even when you have not sold anything.
The SEC’s margin bulletin asks investors: “Are you aware you may lose more than the amount of money you initially invested when buying on margin?” That is investor education, not a new rule, but it describes the central risk. In the bulletin’s hypothetical example, a stock bought at $50 falls to $15 after the investor contributes $25. The example says the loss exceeds the original contribution and that the customer would additionally owe $10 plus interest. It is an illustration, not a prediction of typical results.
Collateral demands and forced sales
If falling prices or a higher house requirement leave insufficient equity, the firm can issue a collateral demand. You may have to deposit cash or securities promptly. The SEC’s bulletin also asks: “Are you aware that your brokerage firm can sell your securities without notice to you when you don’t have sufficient equity in your margin account?”
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A firm may sell positions it chooses, possibly at an unfavorable price and without consulting you first. Selling can create taxable gains or losses and can leave you owing a remaining loan balance. Do not rely on having time to transfer money after a sharp market move; the agreement controls notice and liquidation rights.
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Regulatory minimums are only a floor. A firm can impose higher “house” requirements, change them for volatile securities or concentrated positions, and require action before a formal regulatory threshold is reached. Ask how the firm calculates equity, which securities are eligible collateral, whether concentrated positions receive reduced loan value and how quickly a deficit must be corrected.
Costs: what changes when you use margin
Interest is the principal incremental cost
The most important additional cost is interest on borrowed money. Compare the annualized rate, whether it is variable, how often it compounds, the day-count convention, when charges post and whether a cash balance offsets the debit. Some firms automatically net or sweep cash against a margin loan; others may show a separate cash balance while charging interest on the debit.
These mechanics can materially change the effective cost. In the SEC’s example, a $50,000 margin loan at 7% annual interest costs $3,500 per year, or approximately $9.59 per day. The same example assumes $50,000 of cash earns 1%, or $500 annually. With no netting, the illustrated net cost is $3,000 per year, about $8.22 per day. If a firm nets an equal cash balance against the loan, the example shows that loan interest could be eliminated, while the swept cash would no longer earn the separate cash return. These are SEC hypotheticals, not current rate quotes or universal outcomes.
Other charges are account-specific
- Trading commissions, regulatory fees and wire or transfer charges can apply to either account.
- Margin-account agreements may specify fees for borrowing, hard-to-borrow securities or special collateral handling.
- Interest can accrue during a period when a position is losing value; a profitable trade is not guaranteed to cover financing costs.
- Rates and cash-netting practices can change, so read current disclosures rather than relying on an old statement or an advertised headline rate.
Trading limits and day trading in 2026
Cash-account limits are payment limits
A cash account does not have a universal “number of day trades” allowance. Your practical limit is the amount of settled cash available to pay for purchases and the timing of settlement. Trading with unsettled proceeds and selling before payment can trigger freeriding, as described above. The FINRA guidance on frequent intraday trading is available at Frequent Intraday Trading: Understanding the Basics.
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Before each order, verify:
- the amount labeled settled cash or cash available for purchases;
- the settlement date of any sale you plan to use as funding;
- whether the broker marks the order as fully paid or creates a payment obligation; and
- any existing good-faith, cash-availability or freeriding restriction.
Margin day-trading rules are in transition
As of October 13, 2026, the SEC reports that FINRA’s new intraday margin requirements became effective June 4, 2026, while broker-dealers may transition until October 20, 2027. During this period, one firm may still use the former pattern-day-trader framework while another has migrated to the new approach. A firm can also set higher house requirements.
FINRA’s explanation of the new approach focuses on monitoring account equity against actual intraday positions rather than assigning a customer a permanent designation based only on a count of day trades. A firm may require a deficit to be corrected promptly, and repeated failures can lead to restrictions. FINRA’s investor guidance identifies $2,000 as the minimum equity for leveraged trading while noting that firms may require more. Do not assume that the former $25,000 pattern-day-trader threshold is universally controlling on the research date. Contact your broker and ask which framework its systems apply now; see Understanding the New Intraday Margin Requirements.
Why the transition matters
The same account balance and trade sequence can produce different buying-power displays at different firms during the transition. A platform may show an intraday requirement, a maintenance requirement and a lower overnight requirement as separate figures. Ask what happens when an intraday deficit appears, how quickly it must be corrected, whether positions are liquidated automatically and whether restrictions remain after the deficit is cured.
Choosing between the account types
A cash account is usually the simpler fit when
- You intend to buy securities with money you already have and do not want a loan.
- You can plan around T+1 settlement and are comfortable waiting for proceeds to settle.
- You want to avoid margin interest, collateral calls and forced liquidation rights.
- Your strategy does not require borrowing or permissions that are available only under a margin agreement.
A margin account may fit when
- You understand leverage and can withstand a rapid loss without relying on a future deposit.
- You need borrowing for a specific, documented purpose and have compared the interest and collateral terms.
- You can monitor intraday equity, maintenance requirements and house changes during market volatility.
- You have confirmed which day-trading framework and minimums your firm currently applies.
Do not select margin merely to reuse unsettled proceeds faster. The account is a credit relationship secured by your portfolio, not a free settlement upgrade. If you do not need to borrow, ask whether the firm can keep the account on a cash basis or disable margin borrowing while preserving the permissions you actually use.
A practical pre-trade checklist
- Read the agreement. Find the sections on interest rates, debit balances, collateral eligibility, house requirements, liquidation authority and notice.
- Identify the funding label. On the order ticket, distinguish settled cash from total account value, unsettled proceeds and margin buying power.
- Calculate the full obligation. For a margin trade, include the purchase amount, expected interest, possible fees and a reserve for a higher house requirement.
- Test the downside. Estimate equity after a substantial price decline and ask whether you could meet a demand without selling at a forced price.
- Check the current intraday policy. Ask whether the firm has adopted the June 4, 2026 FINRA requirements or is using the former framework during the transition.
- Confirm product permissions. Stocks, options, short sales and leveraged exchange-traded products can have separate approval and collateral rules.
- Document support contacts. Know the firm’s deadline and method for correcting a deficit, and keep confirmation of any restriction removal.
Common mistakes and how to correct them
Mistake: treating displayed cash as settled cash
Correction: Use the settlement-date detail and the broker’s settled-cash field. If the labels conflict, pause the order and ask support which amount is available to pay on the trade date.
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Mistake: assuming every same-day round trip is forbidden in cash
Correction: Apply the payment test. A trade funded with sufficient settled cash can be permitted, while a trade funded by unsettled sale proceeds can be freeriding. The broker’s controls still govern whether an order is accepted.
Mistake: assuming every margin account follows one day-trading threshold
Correction: Get the firm’s written intraday policy and effective date. The 2026–2027 transition means the applicable framework can differ by broker.
Mistake: focusing on the advertised interest rate only
Correction: Ask how the firm nets cash, when interest starts, how it compounds and what happens if the rate changes. Compare the agreement’s examples with your expected debit balance.
Mistake: expecting a warning before liquidation
Correction: Treat the broker’s liquidation authority as immediate risk. Maintain excess equity, avoid concentrated collateral and know which assets the firm can sell without contacting you first.
Questions to ask a brokerage firm
- What is the current margin interest rate, and is it variable?
- How are daily interest charges calculated and posted?
- Does an available cash balance automatically offset a margin debit?
- What are the current initial, maintenance and house requirements for the securities I trade?
- Which intraday margin framework is active on my account as of today?
- What equity level triggers a deficit, how quickly must it be cured and what restrictions follow?
- Can the firm liquidate without advance notice, and how does it choose positions?
- Where does the platform show settled cash, unsettled proceeds and buying power?
Bottom line for an account decision
Choose cash when full payment, simpler risk and settlement discipline meet your strategy. Choose margin only when the borrowing capability has a specific benefit that justifies interest, collateral demands and the possibility of owing more than you deposited. Before trading frequently, verify the broker’s settled-cash labels, interest and netting policy, house requirements and current intraday rules; those details, rather than the account label alone, determine your real limits and costs.
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