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What Is an Option Premium?

By OptionsPriceCalculator Team · Published October 7, 2026 · Updated October 7, 2026

The option premium is the market price of the contract, quoted per share. A quote of $9.20 means the contract actually costs $9.20 x 100 shares = $920. The buyer pays the premium up front to open the position; the seller collects it immediately and keeps it no matter what happens to the trade afterward.

Premium in dollars = Quoted premium x 100 x Number of contracts

Beginners often see “$4.80” on a screen and assume that’s the full cost. It isn’t. Sell one contract at $4.80 and you receive $480. Buy ten and you pay $4,800.

What’s Inside the Premium

Every premium splits into two parts:

Option Premium = Intrinsic Value + Extrinsic Value

  • Intrinsic value is what the option would be worth if exercised right now - it’s never negative.
  • Extrinsic value (time value) is everything above that: the price of the time left until expiration and the volatility priced into that window. It shrinks every day and hits zero at expiration.

An option that’s purely out-of-the-money, like a $340 call with AAPL at $335, is made entirely of extrinsic value - there’s no intrinsic value to fall back on if the stock stalls.

What Moves the Premium

The premium isn’t static - it reprices with every tick. Three things push it around:

  • The stock itself. A call gets more expensive as the stock rises toward and past the strike; a put gets more expensive as the stock falls toward and past it.
  • Time. Every day that passes strips a little extrinsic value away, and that decay (theta) speeds up hard in the final weeks before expiration.
  • Implied volatility. When the market expects a big move - ahead of earnings, say - premiums across every strike swell to price in that uncertainty. Once the event passes and things calm down, they deflate again, often fast enough to cost you money even if you called the direction right.

Watch an at-the-money option over a quiet week and you can usually see all three forces fighting each other in the price.

Who Pays, Who Collects

The premium is the whole transaction’s cash flow at the moment the trade opens. The buyer’s maximum loss on a long option is capped at the premium paid; the seller’s maximum gain on a short option is capped at the premium received, no matter how far the stock moves in their favor.

Where this is used

See a real premium priced out as the strike and expiration change: open the options calculator and build a call or put with your own numbers.

This article is for educational purposes only and does not constitute financial, investment, legal or tax advice. Options trading involves substantial risk and is not suitable for all investors.