Margin Interest Calculator
Investing & MarketsCalculate the interest charged on a brokerage margin loan over a given number of days.
Margin Interest Owed
The interest charge for borrowing on margin over the given period.
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Frequently Asked Questions
How is margin interest calculated?
Margin Interest = Amount Borrowed x Annual Interest Rate x (Days / Day-Count Basis). Most brokers use a 360-day year for this calculation, though some use 365.
Why do brokers charge margin interest daily instead of just once?
Margin loans accrue interest daily on your outstanding balance, similar to a credit card, so the interest owed grows the longer you hold the borrowed position open.
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