How do you read a payoff diagram?
What does a payoff diagram show?
A payoff diagram shows a strategy's profit or loss as a function of the underlying price. It makes the profit zone, the break-even and the loss limits visible, but it does not automatically account for time value, implied volatility, fees, or the path price takes. For positions spanning several expirations a simulation says more than a plain expiration payoff.
Axes, kinks and flat sections
The horizontal axis is the price of the underlying on a chosen date, the vertical axis the profit or loss of the whole position at that price. Where the line crosses zero you find the break-evens; flat sections at the top and bottom are the maximum profit and maximum loss. Kinks always sit at strikes, because that is where a leg starts or stops contributing value. The slope between two kinks shows how much the position gains or loses per euro of price movement.
Expiration line versus today’s line
Most charts draw a sharp expiration line and sometimes a smoother curve for today. The gap between them is time value: before expiration the options still carry extrinsic value, so the position sits somewhere between its starting value and its expiration payoff. For positions with legs in different expirations, such as calendars and diagonals, there is no single expiration line at all, and only a model with an assumed implied volatility can draw the curve.
The common misreading
A payoff diagram shows outcomes, not likelihoods. The wide profit area of a long straddle looks generous, but the chart says nothing about how far the stock is likely to travel. It also assumes every leg stays open until the date shown; an early assignment, an early close or a roll replaces it with a different chart. Read it alongside the probability of profit and the expected move, not instead of them.
Worked example
Hypothetical numbers for illustration, not a market quote and not a recommendation.
An example stock trades at 100 €. You buy the 100 € call for 4 € and the 100 € put for 3.50 €, paying 7.50 € per share, or 750 € per contract.
On the expiration line the lowest point sits at exactly 100 €, a loss of 750 €. The line crosses zero at 92.50 € and 107.50 €, the two break-evens. Beyond them it rises by 100 € for every euro the stock moves: at 85 € the put is worth 15 €, a profit of (15 − 7.50) × 100 = 750 €. Fees are ignored.
Strategies where the term matters
- Short Iron Condor — Is the range you expect genuinely narrower than the move the market has priced in?
- Long Straddle — Does the move have to be bigger than the one the market has already priced in?
- Long Call Diagonal — Does the upper strike sit above the lower strike plus the debit you paid?
Calculators for this term
Track it in your journal
Related terms
Every term in one place: the options glossary.
This material is general information about option strategies, written for a general audience. It is not investment advice, not a recommendation, and not financial analysis. Options can lose their entire value, and uncovered positions can lose more than the amount committed. Anything said about tax is general in nature and is no substitute for professional tax advice. Last reviewed: 2026-08-06.