Will I be charged with margin interest if I have enough funds in the account to cover my trade?

A margin account allows you to borrow funds to buy securities on a margin. Unlike a cash brokerage account, which only allows you to spend as much money as you’ve deposited, a margin account leverages your purchasing power with debt.

When you open a margin account, your brokerage extends you a line of credit and charges you an interest rate. When you have a Margin account, you always trade with margin, even if you have enough funds in the account.