What Is a Margin Call? How It Works & How to Avoid One

A margin call occurs when your account equity drops below the maintenance margin requirement. Your broker calculates equity as the current market value of your securities minus what you owe on the margin loan.

The process moves fast. You receive notice by phone, email or app alert, and you typically have two to five days to meet the call, though some firms require same-day action during volatile markets.

The maintenance margin requirement is the minimum equity percentage you must maintain after the purchase, typically 25 percent federally but often 30 to 40 percent at major brokers. This is where margin calls are triggered.

FINRA (Financial Industry Regulatory Authority) also enforces minimum equity rules, and individual brokers can impose stricter requirements on volatile stocks, penny stocks or concentrated positions. Always check your specific broker's margin handbook for the exact thresholds and how they calculate equity in real time.

Monitor your account daily when trading on margin. Most brokerages display your margin status, available buying power and distance to a margin call in real time through their app or web portal.

Diversify your holdings to reduce concentration risk. A margin call often results from a single stock plummeting; spreading capital across uncorrelated assets cushions the impact.

If you fail to meet a margin call within the broker's deadline, the firm has the legal right to liquidate your positions without notice to bring the account back into compliance. The broker decides which securities to sell, in what order and at what price.

You remain liable for any remaining debt after the sale. If the liquidation proceeds do not cover your margin loan and any accrued interest, you owe the broker the deficiency.

Trading on margin amplifies both gains and losses, making it a double-edged tool suitable only for experienced investors who understand the mechanics and can afford the potential losses. When markets rise, leverage magnifies returns: a 10 percent gain on a $10,000 position funded with $5,000 of your money yields a 20 percent return on your capital, minus interest costs.

Margin interest rates typically range from 6 to 12 percent annually, depending on the broker and the size of your loan, with rates published in the broker's fee schedule. This cost erodes returns, especially in flat or choppy markets.

Margin calls and pattern day trader (PDT) rules both impose restrictions on margin accounts, but they address different issues. A margin call is triggered by insufficient equity due to market losses, requiring you to restore the account's capital cushion.

If your account falls below $25,000 and you are flagged as a pattern day trader, you cannot make further day trades until you bring the equity back above the threshold—this is a "day trade call," distinct from a margin call. You can still hold positions overnight and make long-term trades, but the same-day buying and selling is restricted.

What is the minimum equity for a margin account?

Federal rules require a minimum of $2,000 in equity to open a margin account, though many brokers set higher minimums, often $5,000 to $10,000. If your equity falls below $2,000, you may receive a maintenance call even if you are above the percentage-based maintenance margin.

How quickly must you respond to a margin call?

Most brokers give you two to five business days to meet a margin call, but some firms require same-day or next-day action, especially during high volatility. The deadline is specified in the margin call notice, and failing to meet it allows the broker to liquidate positions immediately.

Can a margin call happen overnight?

Do all brokers have the same margin requirements?

No. While Regulation T sets a 50 percent initial margin and FINRA enforces a 25 percent maintenance minimum, individual brokers often impose stricter rules—30 to 40 percent maintenance margins and higher requirements for volatile or low-priced stocks.

What is the difference between a margin call and a maintenance call?

The terms are often used interchangeably, but technically a "maintenance call" refers specifically to falling below the maintenance margin requirement, while "margin call" can also include failing to meet the initial margin on a new purchase. In practice, most investors and brokers use "margin call" for both scenarios.

Can you avoid selling by depositing securities instead of cash?