In-the-money

In-the-money (ITM) describes an options contract that already has built-in value if it were exercised right now, based purely on where the underlying stock is trading versus the option's strike price.

An option gives its holder the right, but not the obligation, to buy (a call) or sell (a put) a stock at a fixed price, called the strike. A call option is in-the-money when the stock's current price is above the strike, because the holder could, in theory, buy the stock cheaper than the market price. A put option is in-the-money when the stock is below the strike, because the holder could sell the stock for more than it's currently worth on the open market. That built-in gap between strike and stock price is called intrinsic value, and it's the defining feature of an ITM option.

The nuance that trips people up is that "in-the-money" says nothing about whether the option is a good trade or whether it will make money overall. An option's price (the premium) also includes time value, which reflects how much the stock could still move before the option expires. A deep ITM option can still lose money if the stock reverses, and an option can flip from ITM to out-of-the-money (or back) simply because the stock ticked across the strike price — it's a constantly shifting label, not a fixed category.

It also helps to keep this separate from "profitable for the person who bought the option." Whether a trader is actually up or down money depends on what they paid for the option versus its current value, not just whether it's ITM.