How Long Do I Have to Fix an Intraday Margin Deficit?

An intraday margin deficit (IMD) is the largest shortfall below maintenance margin that a margin account shows right after a trade or withdrawal that shrinks its cushion. Under FINRA Rule 4210(d)(2), in effect since June 4, 2026, the deficit must be satisfied as promptly as possible, and if it is not, it expires after the close on the 15th business day. The deadline that matters more is the fifth business day: as of October 2026, a customer who makes a practice of paying deficits slowly and misses it can be barred for 90 calendar days from creating or increasing a debit balance or a short position.

What is an intraday margin deficit?

An intraday margin deficit is the amount by which a margin account falls short of its maintenance requirement immediately after a transaction that reduces its margin cushion. The intraday margin level, or IML, is the cash a customer could withdraw while still meeting maintenance margin, shown as a negative number when a deposit would be needed instead. An IML-reducing transaction is any purchase or sale that lowers that level, including option exercises and assignments, plus any withdrawal of cash or securities, and the day's deficit is at least the largest negative IML after any such transaction. The rule text and its examples are in FINRA's Rule 4210 interpretations valid from June 4, 2026.

A deficit therefore starts with activity in the account, such as a trade, a withdrawal, or an option exercise, assignment, or expiration. Under interpretation 4210(d)(2)(A)/02, a firm is not required to compute an intraday deficit for a day with no IML-reducing transaction, so a position that slides below maintenance while you do nothing leads to an ordinary maintenance call, which FINRA Regulatory Notice 26-10 says the new standard supplements rather than replaces. The deficit is also measured at its worst point of the day, so closing a position opened that morning an hour later does not erase it.

Firms can enforce the standard in real time, rejecting any order that would create a deficit, or with a single calculation after the close, as FINRA's investor guide to the new intraday margin requirements explains. At a real-time firm the order is usually blocked, while at an end-of-day firm the trade goes through and the deficit surfaces after the close as a call for margin. For how these standards replaced the pattern day trader framework, see hi2morrow's guide to the PDT rule in 2026 and what changed.

How long do you have to fix an intraday margin deficit?

The rule's answer is "as promptly as possible," and three numbered deadlines sit behind that phrase. Under Rule 4210(d)(2)(C)(iii), a deficit remains outstanding until it is satisfied or until immediately after the close of business on the 15th business day after the day it occurred, when it expires. Under 4210(d)(2)(D), the fifth business day is the line with consequences for a customer who makes a practice of failing to satisfy deficits promptly. Interpretation 4210(d)(2)(D)/01 supplies the benchmark for that practice: a customer who satisfies all but three deficits occurring in a rolling 12-month period within three business days after each one would not be considered to be making a practice of failing.

Read together, those numbers form a working timeline. Clearing a deficit within three business days keeps it out of the count, while a fourth slow deficit within 12 months takes the account outside FINRA's benchmark. The fifth business day is when the freeze applies to a customer with such a practice whose deficit is still open, while the 15th business day only ends the deficit itself. None of these dates is a grace period your firm has to give you: FINRA's overview of brokerage accounts reminds customers that they are not entitled to an extension of time on a margin call and that a firm can sell securities without notice.

Firms also have their own reason to move quickly. Under interpretation 4210(d)(2)(C)(iii)/01, if a firm promptly makes a bona fide call and the deficit is still unsatisfied at the close of the fifth business day, the firm has a capital charge under SEA Rule 15c3-1(c)(2)(xii) until the deficit is satisfied or expires, which can last up to ten business days and gives firms a reason to chase deficits early. Deficits most often appear when positions are sized close to the intraday ceiling, a pattern hi2morrow's explainer on 4x intraday buying power and the close breaks down.

What counts as fixing an intraday margin deficit?

A deficit is satisfied when, between the end of the deficit day and the end of a later day, the account's net deposits or other increases in IML add up to the deficit, under Rule 4210(d)(2)(C)(ii). The starting point is always the close of the deficit day, and whatever cushion the account happens to have at that close does not count toward the cure, so closing the risky position before the bell does not satisfy the deficit by itself.

FINRA's examples in interpretations (C)(ii)/01 through /05 show how each method is scored. Cash counts on a net basis, so deposits offset by withdrawals over the same period do not satisfy anything, while one net deposit large enough can cover several outstanding deficits on the same account. Deposited securities count after a haircut equal to their own maintenance requirement, so fully paid stock carrying a 25% requirement contributes about 75% of its market value. A sale helps only by the maintenance it releases, and in FINRA's example a $2,500 sale of stock with a 25% requirement raises the IML by just $625.

Market gains count as well, but only as a net change from the end of the deficit day. In FINRA's example, IML increases of $1,500 on Tuesday and $1,500 on Thursday cannot be added together while ignoring a $3,000 decrease on Wednesday, and in another example FINRA says a same-day deposit and an increase in the IML cannot be added together.

How does an intraday margin deficit play out in a real account?

The figures below are an illustration based on our own calculations, assuming a 25% maintenance requirement on both stocks, no commissions or interest, a firm that measures deficits at current prices, and a week without market holidays. A trader starts Monday with $10,000 in cash and at 10:00 a.m. ET buys 400 shares of ABC at $50, a $20,000 position with a $10,000 debit and a $5,000 maintenance requirement, which leaves an IML of $5,000. By 11:30 a.m. ET, ABC is at $47, the position is worth $18,800, equity is $8,800, and the IML has shrunk to $4,100.

At that moment the trader buys 550 shares of DEF at $40 for $22,000. Positions are now worth $40,800 against a $32,000 debit, equity is still $8,800, and maintenance rises to $10,200, so the IML is minus $1,400, which becomes Monday's intraday margin deficit. A real-time firm would likely have blocked the DEF order, while an end-of-day firm executes it and finds the deficit after the close. Selling DEF at $40.20 at 2:00 p.m. ET restores a comfortable cushion of about $4,210 at the close with ABC still at $47, yet the $1,400 deficit stands, because it was fixed at the worst point after the purchase and DEF was not a position held at the start of the day.

The deficit also counts toward a practice, since the threshold is the lesser of 5% of account equity or $1,000. With Monday's closing equity of $8,910, 5% is about $446; the rule does not say when equity is measured, so that figure is our estimate, but $1,400 clears it either way.

There are three straightforward cures. A $1,400 cash deposit on Tuesday satisfies the deficit outright. Selling ABC raises the IML by 25% of the sale, so about $5,600 of stock has to go, or 120 shares at $47. Waiting for the market works only if the 400 ABC shares gain about $1,867 in value, since just 75% of a gain reaches the IML, which means a close near $51.67, almost 10% above Monday's close. On the calendar, FINRA's three-business-day benchmark points to Thursday, the fifth business day is the following Monday, and the deficit would expire after the close on the Monday three weeks after it occurred.

Can you prevent a deficit before the trading day ends?

Sometimes, if your firm uses two optional treatments in Rule 4210(d)(2)(B)(iv). The first lets the firm treat every deposit and withdrawal made during the day as if it happened right after the day began. Interpretation (B)(iv)a./01 makes it all or nothing, so a firm cannot move a deposit to the start of the day while leaving a withdrawal where it fell, and FINRA's own example in (B)(iv)a./02 says a wire that arrives before the end of the day could preempt the deficit by being treated as made at the beginning of the day. In the example above, a $1,400 wire on Monday afternoon would have left the lowest IML at zero.

The second treatment covers closing trades. Under interpretation (B)(iv)b./01, a firm may treat the maintenance released by closing a position that was open at the beginning of the day as available throughout the day. Had the ABC shares been carried over from the previous week, selling 120 of them later on Monday would have released about $1,410 of maintenance that such a firm could count against the 11:30 a.m. shortfall, while selling the DEF shares bought that morning does not qualify.

Both treatments are permissions rather than requirements, so the answer depends on your firm's procedures. And when a firm cannot show the order in which activities happened, Rule 4210(d)(2)(B)(vi) assumes the sequence that produces the largest deficit.

When does the 90-day freeze apply, and what does it block?

The freeze applies only when two conditions meet: the customer makes a practice of failing to satisfy deficits promptly, and a deficit is still unsatisfied at the close of business on the fifth business day. Deficits that do not exceed the lesser of 5% of account equity or $1,000 do not count toward that practice, and neither do deficits the firm reasonably determines arose under extraordinary circumstances, under Rule 4210(d)(2)(D)(i) and (ii). Since the all-but-three benchmark in interpretation 4210(d)(2)(D)/01 tolerates up to three slow deficits in a rolling 12 months, one slow deficit in an otherwise clean record stays inside it, although a firm's own policy can be stricter.

Once the freeze applies, the firm must enforce written policies and procedures reasonably designed to prevent the customer from creating or increasing a short position or a debit balance, other than by closing a short position, for 90 calendar days after that fifth business day or until the deficit has been satisfied. The rule adds "without regard to its expiration," so the deficit lapsing on the 15th business day is not listed as a way out. The text does not separately address sales of long positions, so how a frozen account handles other orders depends on the firm's procedures. Interest, stock-borrow premiums, dividends owed on short positions, and service charges can still be applied under interpretation 4210(d)(2)(D)/02.

This is a different restriction from the 90-day freeze in a cash account, which comes from Regulation T after a customer sells securities that were not paid for and requires full cash before each purchase, as hi2morrow's guide to day trading in a cash account after T+1 explains.

How do you check your broker's deficit policy?

Start with the enforcement model: real-time blocking or an end-of-day call. Next, find the house deadline and the liquidation sequence, because a firm may expect cash on the next business day and may sell without waiting for you. Ask whether the firm applies the start-of-day treatment for deposits and for closing positions held from a prior day, which decides whether a same-day wire or sale can stop a deficit from forming. Finally, find where the account screen shows an open deficit and the date of its fifth business day. If the help center does not cover these points, ask support in writing and keep the dated reply.

Alexander Styopin's professional view: the 15-day expiry is the number traders remember and the least useful one. What decides the outcome is the first three business days, because a deficit cleared inside that window stays out of FINRA's all-but-three count, and after the fifth business day the firm's capital charge and the freeze start to drive events. Cash is usually the cheapest cure, since at a 25% requirement a sale has to be about four times the deficit to fix it. A trader who keeps an idle cash buffer roughly the size of a bad day's shortfall rarely has to choose between a forced sale and a frozen account.

Educational material only. Not investment or legal advice. Margin requirements, deficit deadlines, and house policies can vary by broker, account type, and jurisdiction, and firms may apply stricter rules than the FINRA minimum.

Author: Alexander Styopin, hi2morrow analyst and economist with 25 years of experience in the US stock market