Settlement, and what good funds means
US equities settle one business day after the trade, T+1. Until settlement, a sale's proceeds are not fully yours, and in a cash account spending them before they settle creates a good-faith violation. Repeated violations lead the broker to restrict the account to settled cash only, which is the most common surprise for a new account and a pure mechanics problem.
This constraint bites in proportion to activity. Someone buying twice a year will never encounter it. Someone trading several times a week in a cash account will meet it quickly, and the fix is understanding the cycle rather than trading around the restriction.
Day-trading margin, and the test that replaced the trade count
A day trade is opening and closing the same position on the same day. For years the mechanical dividing line was a count: four or more day trades within five business days designated a margin account a pattern day trader and carried a 25,000-dollar minimum equity requirement. That framework no longer exists. Amendments to FINRA Rule 4210 effective 4 June 2026 replaced it in its entirety, including both the trade count and the 25,000-dollar minimum (Regulatory Notice 26-10).
What replaced it is measured rather than counted. A member now determines whether the account carries equity commensurate with its actual exposure during the trading day, and the quantity that matters is the intraday margin deficit rather than a number of trades. A customer has five business days to satisfy a deficit; after that the member must prevent the account from creating or increasing a short position or debit balance for 90 calendar days (FINRA's own summary for investors).
One practical caveat matters more than the change itself. Members may phase the new framework in through 20 October 2027, so a broker may still be applying the old designation today, and a reader who meets a 25,000-dollar figure in an account agreement is looking at a transition arrangement rather than a current rule. The account agreement is the authority on which framework your own broker is running.
Cash account, margin accountDay-trading margin applies to margin accounts. A cash account is not subject to it, but is subject to settlement: you can only buy with settled funds, which limits turnover in a different way. Neither structure permits unlimited frequency; they constrain it through different mechanisms.
Holding period changes the tax treatment
In the US, a position held for more than one year is generally taxed at long-term capital gains rates, and one held for a year or less at ordinary income rates. That difference is often larger than any trading cost, and it is decided by a date rather than by a strategy.
Frequent trading also generates the wash-sale rule: a loss claimed on a security repurchased within thirty days is disallowed for immediate use. This is a mechanical, calendar-driven rule that changes the after-tax result of activity that looked identical before tax. Specific treatment depends on your jurisdiction and circumstances, and this page describes the mechanism rather than advising on it.
What actually follows from the choice
Frequency determines which mechanisms apply to you. Higher frequency means settlement timing matters, day-trading margin can bind, gains are more likely short-term, and the bid-ask spread is paid more often. Lower frequency means those largely disappear and different things matter: position size, and whether you can hold through a decline without being forced to sell.
That is why the honest answer to "which is right for you" is not a personality assessment. It is a list of constraints that switch on at different activity levels, and the useful exercise is checking which ones your intended behavior triggers before it does.