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Margin Calculator

Calculate margin requirements, buying power, and margin call prices. Currently calculating in US Dollar.

Position Details
Enter your account and position information
50%

Regulation T requires 50% for most stocks

25%

FINRA minimum is 25%

8%

Position Value

$40,000

400 shares @ $100

Margin Borrowed

$15,000

1.60x leverage

Margin Call Price

$50

50.0% buffer

Buying Power

$50,000

Up to 500 shares

Margin Interest Costs

Daily

$3

Monthly

$100

Annual

$1,200

Equity at Different Prices
How your equity changes as the stock price moves
Risk Scenarios
Impact of price drops on your leveraged position
Price DropNew PriceEquityP/LReturnStatus
-10%$90$21,000-$4,000-16.0%Safe
-20%$80$17,000-$8,000-32.0%Safe
-30%$70$13,000-$12,000-48.0%Safe
-40%$60$9,000-$16,000-64.0%Safe
-50%$50$5,000-$20,000-80.0%Safe
Understanding Margin Trading

Key Terms

  • Initial Margin: Required deposit to open a position (typically 50%)
  • Maintenance Margin: Minimum equity to avoid margin call (typically 25%)
  • Buying Power: Maximum position size with your equity

Risks of Margin

  • Losses are magnified by leverage
  • Interest charges accumulate daily
  • Margin calls can force selling at worst time
  • You can lose more than your initial investment

Margin trading involves significant risk. Only experienced investors should use margin, and only with money they can afford to lose.