How to Calculate Option Premium: A Complete Guide to Options Pricing, Intrinsic Value, and Time Value

Learn how to calculate option premium using intrinsic value, time value, implied volatility, Black-Scholes, and an option premium calculator.

One of the most useful skills that an options trader can acquire is knowing how to calculate the option premium. Whether you are buying a call, selling a cash-secured put, comparing strike prices, or just want to understand why an option costs what it does, the premium should be your starting point. The amount of the option premium is by no means a random figure; it takes into account a number of interrelated factors such as the price of the underlying asset, the strike price, the time until expiry, implied volatility, interest rates, and the expected dividends. Furthermore, the actual price at which the option trades is also affected by market supply and demand. The good news is that it is entirely possible for someone who is not a mathematician to understand the calculation of option premiums. You can begin with a simple formula that takes into account intrinsic value and time value, and then proceed to the various pricing models such as Black-Scholes if you want to gain a more technical understanding. The guide describes the method used to calculate option premiums, the factors that cause them to increase or decrease, and the way in which an option premium calculator can greatly simplify the process. What constitutes an option premium? The amount paid by a buyer to obtain an options contract is known as the option premium. In return, the buyer acquires the right stated in the contract, but not the obligation, to buy or sell the underlying asset according to whether the option is a call or a put. For example, imagine that a stock is trading at $100 and that a trader purchases a $105 call for $3; the option premium is therefore $3 per share. Since ordinary U.S. equity option contracts usually cover 100 shares, the cost of the contract will be $300 before fees and other transaction costs. The premium consists of two main parts: intrinsic value and time value , sometimes referred to as extrinsic value; an option that is in the money has intrinsic value, but one that is at the money or out of the money has no intrinsic value. Why Option Premium Matters It's important because it has an effect on the buyer's first cost as well as the seller's possible obligation. When you buy an option, the premium is the amount of money you pay in advance. When you sell an option, you receive the premium in advance, but that doesn't mean that the premium is automatically a profit since the position involves market risk. That is the reason why it is not sufficient merely to look at the quoted price of an option. A trader ought to know the reason why the premium has reached its present value and what might cause it to change. How is the premium for an option calculated? At the simplest level, the calculation can be expressed as: Option Premium = Intrinsic Value + Extrinsic Value The intrinsic value of an option is determined by its current in-the-money amount, while the extrinsic value is the extra amount that traders are willing to pay for the possibility that the op