A call option is in the money when the underlying stock trades above the option’s strike price. That gap between market price and strike is the option’s intrinsic value, and it is real, immediate worth you can capture by exercising the contract or selling it to someone else. Hold a $50-strike call while the stock sits at $60, and the contract is in the money by $10 per share.
By contrast, a call is at the money when the stock price roughly matches the strike, and out of the money when the stock trades below it. Out-of-the-money calls have no intrinsic value because exercising would mean paying more than the open market charges. These categories shift constantly as the stock moves during the trading day.
How to Calculate Intrinsic Value
Subtract the strike from the current stock price. A $40-strike call with the stock at $47 has $7 of intrinsic value per share. When the stock sits at or below the strike, intrinsic value is zero; it never goes negative, because you would simply let the contract expire rather than exercise at a loss.
The option’s market price almost always exceeds its intrinsic value, especially with weeks or months left before expiration. The difference is extrinsic value, sometimes called time value, and it reflects the market’s estimate of how much the stock might still move. A three-month option on a volatile stock carries substantial extrinsic value because a lot can happen in that window. As expiration nears, that cushion shrinks. On the final day, the option’s market price converges almost entirely to intrinsic value because there is no time left for the stock to move favorably. This erosion is why traders talk about time decay.
Why the Depth of Being In the Money Matters
Delta measures how much an option’s price moves when the stock moves $1. For calls, delta runs from 0.00 to 1.00. A deep in-the-money call with a delta near 1.00 moves almost dollar for dollar with the stock. An at-the-money call sits around 0.50, so a $1 stock move produces roughly a $0.50 change in the option’s price. Out-of-the-money calls have deltas closer to zero and barely react to small stock moves.
Practically, a deep in-the-money call behaves almost like owning the stock outright, which is why some traders use them as a stock substitute with less capital tied up. A barely in-the-money call is far more sensitive to whether the stock drifts back below the strike. Delta also works as a rough proxy for the probability the option finishes in the money: a delta of 0.80 loosely suggests an 80% chance of expiring with value.
When You Can Exercise
Most equity options traded on U.S. exchanges are American-style, meaning you can exercise at any point before expiration. If the stock spikes mid-month and you want to lock in the gain by buying shares at the strike, you can submit exercise instructions right away.
Index options are predominantly European-style and can only be exercised at expiration. The distinction rarely matters to stock option traders but catches people off guard when they move into index products expecting the same flexibility.
What Happens at Expiration
An in-the-money call left alone at expiration does not simply lapse. The Options Clearing Corporation runs an Exercise by Exception process under OCC Rule 805 that automatically exercises any equity option finishing at least $0.01 in the money.1Nasdaq PHLX. Phlx Options 6B Exercises and Deliveries For a call, that means if the stock closes even a penny above the strike, the OCC treats it as exercised. You wake up owning 100 shares per contract at the strike price.
The automatic process protects holders from accidentally letting a profitable option expire worthless. It can also create problems. If your account lacks the cash or margin to absorb 100 shares per contract, your broker will likely close the position before expiration or liquidate shares immediately after exercise. Brokers are not required to warn you first, and many use automated systems that sell positions the moment margin thresholds are breached.
Overriding Automatic Exercise
If you do not want your in-the-money call exercised, you can submit a Contrary Exercise Advice through your broker, which tells the OCC to let the option expire. The deadline for option holders to submit exercise instructions is 5:30 p.m. Eastern on expiration day.1Nasdaq PHLX. Phlx Options 6B Exercises and Deliveries Most retail brokers set their own cutoffs earlier, so check your platform rather than assuming you have the full window.
The reverse works too. If your option expires just barely out of the money but you still want to exercise it, perhaps because you expect an after-hours move, you can submit instructions to exercise through the same process.
Pin Risk
The trickiest scenario is when the stock closes right at the strike. This is pin risk, and it creates real uncertainty. A stock that closes at exactly $50 with a $50 strike call might drift after hours to $50.05, making the option technically in the money. Holders on the other side of your trade may exercise based on after-hours prices, leaving you with an unexpected stock position or assignment. Professional traders manage pin risk by closing positions before expiration rather than gambling on the final minutes.
Taxes When You Exercise or Sell
Exercising a call is not itself a taxable event. Instead, the premium you paid rolls into the cost basis of the shares you acquire. Your basis equals the strike price plus the premium paid for the call, plus any transaction costs.2Internal Revenue Service. Publication 550 – Investment Income and Expenses Pay $3 per share for a $50-strike call, exercise it, and your basis in the stock is $53 per share. Nothing is owed until you sell those shares.
The holding period for the acquired stock begins the day after you exercise, not the day you bought the option.2Internal Revenue Service. Publication 550 – Investment Income and Expenses This matters for the long-term capital gains rate. If you held the option for eleven months and then exercised, you start fresh on the holding period for the stock and would need to hold the shares more than a year from the exercise date to qualify for long-term treatment.
If you sell the option itself rather than exercising it, the gain or loss is reported on Form 1099-B from your broker.3Internal Revenue Service. About Form 1099-B, Proceeds from Broker and Barter Exchange Transactions Short-term or long-term treatment depends on how long you held the contract before selling.
Wash Sales and Calls
Sell a stock at a loss and buy a call on the same stock within 30 days, and the IRS treats it as a wash sale. The loss deduction is disallowed. The statute specifically includes “contracts or options to acquire” stock as triggering the rule, so whether the call is in the money, at the money, or out of the money makes no difference.4Office of the Law Revision Counsel. 26 USC 1091 – Loss From Wash Sales of Stock or Securities The 61-day window runs from 30 days before the sale through 30 days after. The disallowed loss gets added to the cost basis of the replacement position, so the deduction is deferred rather than lost forever.