01
The Pattern Day Trader Designation
FINRA rules define a pattern day trader as someone who executes four or more day trades within five business days in a margin account, where those day trades represent more than six percent of total trading activity in that period. A day trade is a buy and a sell of the same security on the same day.
Once designated, the account must maintain $25,000 in equity. Fall below it and day-trading privileges are suspended until the equity is restored. The designation is sticky: brokers generally keep it on the account even after activity slows, though many will remove it on request if the pattern does not recur.
The rule exists because leveraged intraday trading in a margin account creates settlement and credit exposure for the firm. Whether that justifies a $25,000 line is a fair argument, but it is the line, and the enforcement is automated.
02
Cash Accounts: No PDT, But Settlement Rules
The PDT rule applies to margin accounts. In a cash account you can trade as often as your settled cash allows, with no four-trade limit and no $25,000 floor. The constraint moves from trade count to capital availability.
US equity trades settle on a T+1 basis, meaning proceeds from a sale become settled funds the next business day. Until then, that money is unsettled. You can buy with unsettled funds, but you must not sell the newly purchased position before the funds that paid for it have settled.
The practical effect is a rolling cycle: with $30,000 in a cash account you effectively deploy roughly your balance per day rather than four times it. Many traders below the PDT threshold split capital across two cash accounts to smooth the cycle, which is legitimate as long as each account's own settlement rules are respected.
03
Good Faith, Free Riding, and Liquidation Violations
A good faith violation occurs when you buy with unsettled proceeds and sell the new position before those proceeds settle. Three good faith violations in a rolling twelve-month period typically restrict the account to settled cash only for 90 days.
Free riding is the more serious version, prohibited by Regulation T: buying a security without sufficient settled funds and then selling it to pay for the purchase. A single free-riding violation generally triggers a 90-day restriction immediately.
A cash liquidation violation happens when you buy a security and then cover the cost by selling a different position that had not yet settled. Same principle in all three cases: the purchase must be funded by money that is actually available, not by the proceeds of a future sale.
04
Choosing Between the Two, and the Other Routes
If your edge requires multiple round trips per day on the same names, the cash-account cycle will strangle it and you either fund to $25,000 or look at a proprietary firm arrangement. If your holding period is a day or longer, a cash account is often the better structure below the threshold — no leverage, no PDT, no forced liquidations.
Other legal routes below $25,000: swing trading in a margin account while staying under four day trades per five days, trading futures or forex, which sit outside the equity PDT framework entirely, or trading through a firm that provides capital under its own risk rules.
What does not work is opening several margin accounts to spread day trades around. Firms and clearing systems monitor this, and it looks exactly like what it is. Pick a structure that fits the strategy and trade inside it.