How do you calculate profit on a long call?

At expiration, profit equals the stock price minus the strike, minus the premium paid, multiplied by 100 per contract. If the stock finishes below the strike the option is worthless and the loss is the full premium. In the example, a $110 finish on a $100 call bought for $4.00 gives ($110 minus $100 minus $4.00) times 100, or $600.

What is the breakeven on a call option?

Breakeven is the strike price plus the premium paid. A $100 call bought for $4.00 breaks even at $104 at expiration. Before expiration the option still has time value, so it can be sold at a profit below that level if the stock moves quickly.

Is buying a call option risky?

The maximum loss is capped at the premium, so the dollar risk is known in advance. The probability of losing that entire amount is high, though, because the stock must move enough to overcome time decay before expiration.

What happens if my call option expires in the money?

Most brokers automatically exercise any option that is at least $0.01 in the money at expiration. You will be assigned 100 shares per contract and charged the strike price, which requires enough cash or margin to cover the purchase. If you do not want the shares, sell the call before the market closes on expiration day.

Should I buy in-the-money or out-of-the-money calls?

In-the-money calls cost more but have a higher delta, so they gain more per dollar of stock movement and lose less to time decay as a percentage of the premium. Out-of-the-money calls are cheaper and offer more leverage, but a larger share of their price is time value that erodes daily.

Why did my call option lose value when the stock went up?

Two forces can overwhelm a small favorable move: time decay and falling implied volatility. If the stock rises slowly, the daily loss of time value can exceed the gain from delta. After an event such as earnings, implied volatility often collapses, and that alone can wipe out the gain from a modest move higher.

Long Call Calculator & strategy guide

Single-Leg OptionsBeginnerBullishDefined risk

Buy a call option to profit from a bullish move with limited risk.

Payoff at expiration

Worked example: XYZ at $100, 45 days to expiration

Profit Loss Breakeven

Max profit: Unlimited; Unlimited (stock can rise indefinitely)
Max loss: −$400; Premium paid
Breakeven: $104; Strike price + premium paid

The trade · net debit $4.00 a share ($400)

Buy $100 call · $4.00

Price this long call on SPY with today's chain — then change the ticker, strikes and expiry.

Open in Build

What is a long call?

A long call is the simplest bullish options trade: you buy a call option, which gives you the right but not the obligation to purchase 100 shares of the underlying at the strike price any time before expiration. You pay a premium up front, and that premium is the most you can lose.

The trade profits when the stock rises far enough above the strike to cover the premium you paid. Every dollar the stock climbs beyond the breakeven adds $100 of intrinsic value per contract, and because the stock has no ceiling, neither does the profit.

The payoff diagram is a flat line at the negative premium for every price at or below the strike, then a 45 degree slope upward from the strike. Time decay works against you every day, and a drop in implied volatility shrinks the option's value, so a long call is a bet on direction, magnitude and timing all at once. That leverage is why a small move in the stock can produce a large percentage gain or a total loss.

Setup

Leg	Strike	Expiry
Buy 1 call	At the money	Near

Long Call example

XYZ trades at $100 with 45 days to expiration. You buy the $100 call, which is at the money, for $4.00 per share. The net debit is $400 for one contract, and that is the maximum you can lose. The breakeven at expiration is the $100 strike plus the $4.00 premium, or $104.

Stock at expiration	Result
$95 (or anything at or below $100)	The call expires worthless. You lose the entire $400 premium, the maximum loss.
$104	Breakeven. The call is worth $4.00 of intrinsic value, exactly what you paid. P&L is $0.
$110	The call is $10.00 in the money and worth $1,000. Minus the $400 debit, profit is $600, a 150 percent return on the premium.
$120	The call is worth $2,000. Minus the $400 debit, profit is $1,600.

Maximum loss is the $400 premium if XYZ finishes at or below $100. Breakeven is $104, and profit is unlimited above that. The stock needs to rise 4 percent just to break even, which is the price of the leverage.

When to use a long call

You expect a meaningful rise in the stock within a defined period, not just a slow drift higher.
Implied volatility is low relative to its recent history, so the premium is cheap and a volatility rise would add to the gain.
You want bullish exposure to a stock with a fraction of the capital needed to buy 100 shares, and you accept that the position can expire worthless.
A known catalyst such as earnings or a product launch sits inside the expiration window and you believe the market is underpricing the upside.
Typical entries use 45 to 90 days to expiration and a strike at or slightly in the money, around 50 to 70 delta, so the option tracks the stock closely and time decay is manageable.

Risks to understand

Time decay is relentless. An at-the-money option loses value every day the stock does not move, and the rate accelerates in the final 30 days.
A drop in implied volatility, which commonly happens right after earnings, can cut the option's value even when the stock moves in your favor. This is the classic volatility crush.
The stock has to move enough to cover the premium before expiration. Being right on direction but wrong on timing still loses money.
Out-of-the-money calls are cheap for a reason. Buying far out-of-the-money strikes as lottery tickets has a low probability of profit and most of them expire worthless.
Wide bid-ask spreads on illiquid options mean you pay more on entry and receive less on exit.

Managing the trade

Decide on a profit target and a loss limit before entering. Many traders take profit at 50 to 100 percent of the premium and cut the trade if the option loses half its value.
If the stock rallies quickly, consider selling a higher strike call against the position to turn it into a bull call spread. That locks in some gain and reduces the effect of a pullback.
If the thesis is intact but the move is taking longer than expected, roll the call to a later expiration before the last 30 days, when time decay is steepest.
Avoid holding a deep in-the-money call into expiration unless you want the shares.
Size the position by the premium, not by the notional exposure. Treat the full debit as the amount at risk and keep it to a small percentage of the account.

Long Call FAQs

How do you calculate profit on a long call?: At expiration, profit equals the stock price minus the strike, minus the premium paid, multiplied by 100 per contract. If the stock finishes below the strike the option is worthless and the loss is the full premium. In the example, a $110 finish on a $100 call bought for $4.00 gives ($110 minus $100 minus $4.00) times 100, or $600.
What is the breakeven on a call option?: Breakeven is the strike price plus the premium paid. A $100 call bought for $4.00 breaks even at $104 at expiration. Before expiration the option still has time value, so it can be sold at a profit below that level if the stock moves quickly.
Is buying a call option risky?: The maximum loss is capped at the premium, so the dollar risk is known in advance. The probability of losing that entire amount is high, though, because the stock must move enough to overcome time decay before expiration.
What happens if my call option expires in the money?: Most brokers automatically exercise any option that is at least $0.01 in the money at expiration. You will be assigned 100 shares per contract and charged the strike price, which requires enough cash or margin to cover the purchase. If you do not want the shares, sell the call before the market closes on expiration day.
Should I buy in-the-money or out-of-the-money calls?: In-the-money calls cost more but have a higher delta, so they gain more per dollar of stock movement and lose less to time decay as a percentage of the premium. Out-of-the-money calls are cheaper and offer more leverage, but a larger share of their price is time value that erodes daily.
Why did my call option lose value when the stock went up?: Two forces can overwhelm a small favorable move: time decay and falling implied volatility. If the stock rises slowly, the daily loss of time value can exceed the gain from delta. After an event such as earnings, implied volatility often collapses, and that alone can wipe out the gain from a modest move higher.