What replaced the $25,000 pattern day trader rule

How it works

Two layers set what a US brokerage customer may do in a day. The Federal Reserve's Regulation T sets the credit rules for cash and margin accounts. FINRA Rule 4210 sets margin requirements on top of it for every FINRA member firm. The pattern day trader rule was part of Rule 4210, so FINRA could remove it, and has.

A firm can always be stricter than either layer. FINRA's investor guidance says so plainly: "Your firm has the authority to impose higher requirements if they choose." What a customer meets is the rule plus the house policy, and the house policy is the part that differs by broker.

What the old rule required

The SEC's approval order, Release 34-105226 of 14 April 2026, summarises the rule it retired.

• A day trade was buying and selling, or selling and buying, the same security on the same day in a margin account.
• A pattern day trader was any customer with four or more day trades within five business days, unless they were 6 per cent or less of the customer's trades in that period.
• Minimum equity of 25,000 dollars had to be deposited before the customer could continue day trading, and maintained at all times.
• Day-trading buying power was the previous close's equity less the maintenance requirement, times four for equities. Exceeding it created a special maintenance call.
• An unmet call after five business days restricted the account to trading on a cash-available basis for 90 days, and funds deposited to meet the requirements had to stay in the account for two business days.

The order also notes a gap: because of how a day trade was defined, the old requirements did not consider zero-days-to-expiration options trading, which the new standard covers.

What replaced it

Regulatory Notice 26-10, published on 20 April 2026, describes the new standard in Rule 4210(d)(2). It replaces the old requirements "in their entirety" and measures exposure rather than counting trades.

• Intraday margin level. Broadly, what the customer could withdraw while still meeting maintenance margin, or the deposit needed to meet it.
• IML-reducing transaction. Any trade that lowers that level, such as a purchase or a short sale.
• Intraday margin deficit. The highest shortfall after such a transaction during the day.

FINRA leaves the method to the firm. It may monitor in real time and block trades that would create a deficit, or "make a single calculation of an account's intraday margin deficit" at the end of the day. The rule also lets a firm count FDIC-insured bank sweep balances it operates as a credit, treat the day's deposits and withdrawals as occurring at the start of the day, and treat the legs of a spread entered together as simultaneous. Where the order of two activities cannot be shown, the deficit is computed in the order that produces the highest one.

What happens to a deficit:

What did not change, according to FINRA's guidance: 2,000 dollars is still the minimum equity to trade on margin at all, and maintenance margin is still 25 per cent of the market value of long margin-eligible equities. What is new is when it applies: under the new requirements it has to hold "throughout the entire trading day, not just at end of the day". Portfolio margin accounts with less than 5 million dollars in equity must margin intraday risk on terms substantially similar to end-of-day positions.

Why brokers still count day trades

The effective date was 4 June 2026, 45 days after the notice. But firms "that need more time to implement the rule change will be permitted to phase in their implementation over a period of 18 months, until October 20, 2027". The SEC's order describes that period as one in which members may continue applying the old day trading requirements "as appropriate (e.g., by account)".

So between June 2026 and October 2027 three answers are all compliant:

1. The firm has switched, and nothing counts day trades any more.
2. The firm has not switched, and the four-in-five count and 25,000 dollar minimum still apply.
3. The firm is switching account by account, and two customers of the same broker are on different rules.

FINRA's guidance to investors puts it the same way: "Your firm might continue operating under the old day trading margin requirements during the transition, or they might choose to migrate to the new system sooner." It tells investors to contact their firm.

House rules sit on top of whichever regime applies. Alpaca's help page on the new rule (updated 7 July 2026) says the PDT designation has been removed there, and that a deficit margin call "must be satisfied within two business days". That is tighter than FINRA's own timetable, and allowed.

Cash accounts were never under it

The pattern day trader rule defined a day trade as one made in a margin account. A cash account was outside it before 4 June 2026 and is outside the new intraday standard after it. What governs a cash account is Regulation T's section 220.8.

• A broker may buy a security for a cash customer if there are sufficient funds, or if it accepts in good faith the customer's agreement to pay in full promptly and not to sell before paying.
• Payment is due within one payment period, which section 220.2 defines as the standard US settlement cycle plus two business days.
• If a security is sold "without having been previously paid for in full", the privilege of delaying payment beyond the trade date is withdrawn for 90 calendar days. The freeze does not apply if full payment arrives within the payment period and the sale proceeds are not withdrawn before it.

Brokers name these events in their own terms, but the rule underneath is federal and unchanged by FINRA's amendments. A customer who moved to a cash account to avoid the PDT count is still subject to it.

What it means for software that reads an account

Platforms, journals and scripts that show "day trades remaining" or flag pattern day trader status are reading the old rule. Whether that number still binds depends on your broker's transition, not on the software.

Account APIs lag too. Alpaca, whose market data API has a card here, documents its Trading API's account object in a reference page updated on 27 May 2026. It still describes the multiplier value 4 as a "PDT account with 4x intraday buying power" and buying_power at that multiplier as day-trade buying power computed from the previous day's equity, while the same broker's help page says the PDT designation is gone. A program that reads those fields needs the broker's current definition, not the field's name.

What you can do about it

Ask your broker which regime your account is on, and from when. It may be the old rule, the new one, or a date between now and 20 October 2027. The answer can differ by account at the same firm.

Read the house rules, not only FINRA's. Maintenance above 25 per cent, a shorter window to cover a deficit, or real-time blocking instead of an end-of-day calculation are all permitted. The broker's margin disclosure is where they are written down.

Know the two numbers that trigger a restriction. Under the new standard, a deficit unsatisfied past the fifth business day, by a customer who makes a practice of it, brings the 90-day freeze; deficits up to the lesser of 5 per cent of equity or 1,000 dollars do not count toward the practice.

In a cash account, the clock is settlement, not day trades. Selling a security before it is paid for can freeze delayed payment for 90 days under Regulation T, whatever FINRA's margin rule says.

If your code reads a broker's account fields, re-read their definitions. Day-trade counters, PDT flags and buying-power multipliers were built for the old rule. Check the broker's changelog and reference pages after it switches, and do not hard-code the 25,000 dollar threshold into anything that will outlive October 2027.

The platforms that route and display orders are in trading platforms.