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Calculation Machine

Margin Call Price Calculator

Find the stock price that triggers a margin call.

Reviewed by James Whitfield · How we check our maths

Your values

ⓘ Live results

Results
Margin call price
$66.67
Price drop that triggers call
33.33%
Initial equity percentage
50%
Loan amount per share
$50.00

Quick answer

A margin call is triggered when the stock price falls enough that your equity percentage drops to the maintenance margin requirement, typically 25-30%.

The formula

Call price = purchase price x (1 - initial margin) / (1 - maintenance margin)

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Purchase price per share100 $
  • Percent bought on margin50 %
  • Maintenance margin requirement25 %

Result

  • Margin call price$66.67
  • Price drop that triggers call33.33%
  • Initial equity percentage50%
  • Loan amount per share$50.00

How to use the Margin Call Price Calculator

  1. 1Enter the price you bought the stock at and the percentage financed with margin.
  2. 2Enter your broker's maintenance margin requirement (often 25-30%).
  3. 3Any price at or below the margin call price will trigger a call for more funds or forced liquidation.

Frequently asked questions

What happens during a margin call?

You must deposit cash or securities, or the broker can sell your positions without notice to bring the account back to the requirement.

Can maintenance requirements be higher than 25%?

Yes — brokers can and often do set house requirements above the regulatory minimum, especially for volatile stocks.

About this calculator