Split an option's current premium into its intrinsic value and time (extrinsic) value.
Intrinsic value = max(Spot − Strike, 0) for calls, max(Strike − Spot, 0) for puts. Time value = Current premium − Intrinsic value (never negative in practice, but shown as computed).
Educational tool only — not investment advice. Markets involve risk; past performance and illustrative math don't guarantee future results.
Every option's premium is made of two separate components that behave completely differently: intrinsic value and time value (also called extrinsic value). Intrinsic value is simply how much the option would be worth if exercised right now — for a call, the underlying price minus the strike price (never below zero); for a put, the strike price minus the underlying price (never below zero). Time value is everything else: premium minus intrinsic value, representing the market's assessment of how likely the option is to become more valuable before expiration.
Time value doesn't decay in a straight line — it erodes slowly at first and accelerates sharply as expiration approaches, a pattern often described as roughly proportional to the square root of the time remaining. This decay is measured by theta: an option with a theta of -0.05 loses about $0.05 of value per day from time decay alone, holding the underlying price and volatility constant. At-the-money options carry the most time value and the fastest theta decay, because they have the most genuine uncertainty about whether they'll finish in or out of the money — a deep in-the-money or far out-of-the-money option has much less time value left to lose, since its outcome is already largely settled either way.
Intrinsic value is what the option would be worth if exercised immediately — the in-the-money amount, never negative. Time value (extrinsic value) is the remainder: premium minus intrinsic value, representing the market's pricing of the chance the option becomes more valuable before expiration.
Time value erodes at an accelerating rate, often described as roughly proportional to the square root of time remaining, because less time means less opportunity for the underlying to move favorably. This is why the final weeks before expiration typically show the sharpest daily value loss for out-of-the-money and at-the-money options.
Theta measures the dollar amount an option's price is expected to decline per day due to time decay alone, assuming the underlying price and implied volatility stay constant. A theta of -0.05 means the option loses roughly $0.05 in value each day from time decay, all else equal.
Because they carry the most genuine uncertainty about whether they'll finish in or out of the money at expiration — the outcome is still very much undecided. Deep in-the-money or far out-of-the-money options have much less time value, since their eventual outcome is already largely determined either way.