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Many traders are confused by how the type of account they have affects their option trading. First of all there are three different types of brokerage accounts. They are cash, margin and retirement. In order to trade options in any of these accounts you must first be approved for options trading.
Approval for options trading is based on your experience in options trading. Typically your broker will ask how many years experience you have trading options. In your account application you are typically asked what types of options trading you have done. Have you only bought options? Have you done spreads? Have you written naked options?
In a cash account you will only be able to execute option trades on a cash basis. If you only plan to buy options this is usually not too much of a constraint. Purchasing options is always done on a cash basis even in a margin account so there is nothing lost by buying an option in a cash account either.
However, your broker will require a cash deposit if you write options. Usually this is too onerous a requirement to make any reasonable return on option writing. You may also be able to write covered calls in a cash account. You do have to put up the money for the stock but can sell the call with no additional investment required.
In a margin account you can borrow money by putting up the stock as collateral. However, when you buy an option you must put up the entire cash price of the option at the time of purchase. This is just the same as buying an option in a cash account.
The main advantage of trading options in a margin account is that at most brokers you can put up a much smaller margin deposit which gives you better return on investment. Remember for all practical purposes your investment is your margin deposit. So the relevant metric is the return on margin.