First, ensure that your brokerage account is a margin account. A margin account is simply an investing account that is authorized to have a margin loan. While there are various rules and requirements associated with margin accounts and trading on the margin, margin loan is basically a loan made to a client by a broker within their stock trading account.
Like all loans, there are interest expenses and other potential costs with a margin loan. The interest rate for a margin loan depends on the brokerage and is often tiered according to how much money is in the margin account.
Regardless of whether or not you intend to trade on the margin or use the margin loan, all option trading accounts must be margin accounts due to some of the intrinsic properties of stock options. So, if your account is not a margin account, you’ll need to get it approved as a margin account along with getting it approved as an option account.