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How options are priced: intrinsic value plus time value

An option's price can look random. It isn't. Every premium splits into 2 parts, and 6 inputs decide how big each part is.

Beginner guide · 9-minute read · Updated 2026-10-21

It's simpler than it looks

Every option price has 2 parts:

• Intrinsic value: what the option would be worth if it expired right now.
• Time value: everything else. It's what people pay for the chance of a bigger move before expiry.

Premium = intrinsic value + time value. That's the whole frame. The rest of this page fills it in.

If calls, puts and strikes are new, read options trading basics first.

Intrinsic value: the "right now" part

Intrinsic value is simple math. It can never be below zero.

• Call: stock price minus strike, if the stock is above the strike.
• Put: strike minus stock price, if the stock is below the strike.

Say a stock trades at $52.

An option with intrinsic value is In the money. One with none is Out of the money. An option with a strike right at the stock price is At the money.

Time value: the "maybe later" part

Time value is the extra people pay above intrinsic value.

Say that $50 call costs $3.20. Its intrinsic value is $2.00. So its time value is $1.20.

Out-of-the-money options are made of only time value. If the $55 call costs $0.80, all $0.80 is time value. If the stock is still below $55 at expiry, all of it disappears.

The 6 inputs that set the price

Pricing models take 6 inputs. The best known is the Black-Scholes model, published in 1973. Brokers use it, or newer models built on the same ideas.

5 of the 6 inputs are facts you can look up. The stock price, strike, days left, rates and dividends are all known.

Only one is a guess: volatility. That's why it gets its own guide: implied volatility explained.

Why more time costs more

More time means more chances for a big move. So a 90-day option usually costs more than a 30-day option at the same strike.

But not 3 times more. Time value grows more slowly than the days do. In the basic model, it grows roughly with the square root of time. So a 4-times-longer option is often only about 2 times the time value.

That's also why time value melts faster near the end. See theta decay explained.

Why bigger expected swings cost more

Think of insurance on a house in a calm town versus a storm zone. Same house. Different price.

When the market expects big swings, every option costs more. Both calls and puts. This is the "volatility" input, and it moves every day.

A worked example you can check

A made-up stock, XYZ, trades at $100. Here's a small slice of a 30-day chain (illustrative prices):

Look at the pattern:

• Time value is biggest at the money ($3.10). That's where the outcome is most uncertain.
• Deeper in or further out, time value shrinks.
• The $95 call costs more in total, but most of that is real value, not hope.

Max loss when you buy

Buying any of these calls, the most you can lose is the premium paid.

Try other strikes and prices in our options profit calculator.

Calls and puts are linked

Calls and puts on the same stock, strike and expiry are tied together by a rule called put-call parity. If their prices drift too far apart, big traders can lock in a near risk-free trade, and that pushes the prices back.

You don't need the formula. Just know that calls and puts aren't priced in separate worlds. If one looks "cheap" next to the other, there's usually a reason, like a dividend or the cost of borrowing.

The bid, the ask and the real price

The model gives a fair value. What you actually pay is the ask. What you'd get selling is the bid.

On busy options, the gap is often a few cents. On quiet ones, it can be wide. A $0.20 gap on a $1.00 option is 20% of the price, before anything moves. Our options chain guide shows how to spot it.

Common mistakes

• Thinking a cheap option is a bargain. Low price usually means a low chance of paying off.
• Ignoring time value on in-the-money options. Selling an in-the-money option before expiry usually keeps its time value. Exercising early usually throws it away.
• Comparing prices across different expiries. A 7-day and a 60-day option aren't the same product.
• Forgetting the spread. The model price isn't the price you get.

Try it today (no money needed)

1. Pick one large stock and open its options chain, about 30 days out.
2. Choose 3 calls: one below the price, one near it, one above it.
3. For each, work out intrinsic value and time value.
4. Which strike has the most time value? Check that it's the one nearest the stock price.
5. Repeat for an expiry about 90 days out. Compare the time values.

Questions