Options Profit Calculator

Calculate a Stock Option’s Profit at Expiration

Options Profit Formula

Formula

\[\text{Profit or loss}=\bigl(q\max(I,0)-qP\bigr)(100N)-F,\qquad I=\begin{cases}S-K&\text{call}\\K-S&\text{put}\end{cases},\qquad q=\begin{cases}1&\text{buy (long)}\\-1&\text{sell (short)}\end{cases}\]

Where:

$S$ — stock price at expiration, in dollars per share
$K$ — strike price, in dollars per share
$P$ — premium, in dollars per share
$N$ — number of contracts; each represents 100 shares
$F$ — total commissions, in dollars
$I$ — the option’s value at expiration before the zero-value floor
$q$ — 1 for a bought option or −1 for a sold option

The formula subtracts the premium paid for a long position or adds the premium received for a short position, then subtracts commissions. It assumes the position is held to expiration.

Options Profit – Calculation Example

Example: Buy one call with a $100 strike for a $5-per-share premium. The stock closes at $100 at expiration, and total commissions are $0.

\[\text{Intrinsic value}=\max(100-100,0)=0\text{ per share}\]

\[\text{Profit or loss}=(0-5)\times(1\times100)-0=-\$500\]

\[\text{Profit or loss as \% of premium}=\frac{-500}{5\times100}\times100=-100\%\]

Result: a $500 loss, equal to 100% of the premium paid. The call’s break-even stock price is $105 per share; its maximum loss is $500, while its potential profit is unlimited.

How to use the calculator

Choose Option type: Call if the option benefits from a higher stock price, or Put if it benefits from a lower one.
Choose Position: Buy (long) if you paid for the option, or Sell (short) if you received the premium.
Enter the Strike price and Premium, both in dollars per share. Use the premium for one share, not the total paid or received.
Enter the Number of contracts. The calculator uses 100 shares per contract.
Enter your expected Stock price at expiration in dollars per share.
Enter Total commissions for the entire position in dollars, not per contract. Read the profit or loss, percentage, break-even, risk limits, payoff table, and chart.

What option profit at expiration means

A call has value at expiration only when the stock price exceeds its strike; a put has value only when the stock price falls below its strike. This value, called intrinsic value, is not the same as profit. A buyer must recover the premium and commissions before making a net profit. A seller keeps the premium but owes any intrinsic value and still pays commissions.

Profit or loss at expiration is the position’s dollar outcome at the stock price you entered. Profit or loss as % of premium divides that outcome by the gross premium amount across all contracts. It is not an annualized return or a return on the capital required to secure a short option. If the premium is zero, the calculator reports this percentage as unavailable.

The Break-even stock price is intended to show where profit or loss reaches zero. For a long call, it is the strike plus the premium and commissions per share; for a long put, it is the strike minus those amounts. A break-even point below $0 cannot be reached by a nonnegative stock price. See the sold-call limitation below before relying on its displayed break-even result.

The Maximum profit and Maximum loss describe the theoretical limits of the position at expiration. A long call has unlimited potential profit and a loss limited to its premium plus commissions. A short call has limited potential profit but unlimited potential loss. Put outcomes are bounded because the stock price cannot fall below zero. The calculator’s payoff table and chart show 11 stock prices from 50% to 150% of the strike; they do not show every possible outcome.

Assumptions and practical limitations

Sold-call break-even warning: the calculator’s displayed break-even price for a short call can say “None at a nonnegative stock price” even when a break-even price exists. Calculate it as the strike price plus the premium minus total commissions divided by the number of shares: $K+P-F/(100N)$, provided that price is at or above the strike. If commissions exceed the total premium received, the short call cannot break even at expiration. The profit or loss calculation uses the short-call payoff formula independently of this displayed break-even result.

These are expiration outcomes, not estimates of an option’s resale value before expiration. Time value, volatility, changes in option prices, margin requirements, taxes, interest, dividends, and the consequences of early assignment are not modeled. Enter commissions as one total covering the trades you want included. Actual contract specifications can vary, especially after corporate actions; check that your contract represents 100 shares before using these results.

The chart uses a fixed range around the strike. If your expected stock price lies outside it, rely on the main profit or loss result for that scenario rather than extrapolating from the chart. For a separate way to explore possible stock-price levels, see the Fibonacci Retracement calculator. To compare a multi-year investment’s growth rate with other investments, use the Compound Annual Growth Rate calculator; its annualized measure is different from this calculator’s percentage of option premium.

Frequently Asked Questions

How do I calculate a short put’s profit by hand?

Subtract the put’s value at expiration from the premium received, multiply by the shares covered, then subtract fees. For example, sell one $50-strike put for $3 per share. If the stock finishes at $45, the put is worth $5 per share, so the result is $(3-5)\times100=-\$200$ before fees. Check your contract’s share multiplier before calculating.

What is a good profit percentage on an option?

There is no universal good percentage. A gain relative to the premium can look large even when the trade involved substantial risk, especially for a sold option that required collateral or margin. Compare the dollar outcome with the capital at risk, the chance of loss, and your trading costs. An option’s premium-based percentage alone does not tell you whether the trade was worthwhile.

Can an option expire in the money and still lose money?

Yes. “In the money” means the option has intrinsic value, not that the trade made a profit. A call bought for $6 per share with a $100 strike is worth $4 per share if the stock finishes at $104. The buyer loses $2 per share, plus any fees, despite the call expiring in the money.

Can I use the expiration profit figure if I sell the option before expiration?

No. A closing trade uses the option’s market price when you sell or buy it back, rather than its intrinsic value at expiration. That market price may also reflect remaining time, expected volatility, and trading conditions. To calculate a long option’s realized result, subtract its purchase price and trading costs from its sale price, then apply the contract multiplier.

What happens if my option is exercised or assigned?

Exercise or assignment can create a stock transaction rather than simply a cash payment. For example, assignment on a standard short put generally requires you to buy 100 shares per contract at the strike price. Whether an option is automatically exercised, and when assignment occurs, depends on the contract and broker. The calculated expiration payoff does not include later gains or losses on shares you receive or deliver.

How do I convert an option premium quote into a contract cost?

Multiply the quoted per-share premium by the contract’s share multiplier and the number of contracts. At $2.40 per share, three standard 100-share contracts cost $720 before fees. A $0.01 change in the option’s quoted price equals $1 per standard contract. Adjusted contracts may cover a different number of shares or other deliverables, so verify their specifications rather than assuming the standard multiplier.