When the security price is less than the exercice price, the call option is referred to as out of the money. Payoff for Buying Call Option.Figure out the payoff and the profit per share in AC: A. You sell a 47 put for 4. The payoff formula is: Short call payoff per share = (premium per share - (MAX (0, (share price - strike price)). Let's implement this calculation in Python. Draw the payoff diagram when the option expires. The thing is I want to model my payoff, because since the premium is so low, I can size up, to maybe 200 contracts. Buying out your spouse through a refinance or another method might be an option if you want to keep the family house. Here's how it works. The long call holder makes a profit equal to the stock price at expiration minus strike price minus premium if the option is in the money.