Most trading platforms can draw a payoff diagram for any options position. It is one of the most useful tools available, and one of the most often misread.
This article explains what a payoff diagram shows, how to find breakevens, maximum profit and maximum loss, the difference between the expiry line and today's line, and the important things a payoff diagram does not tell you.
The axes
A payoff diagram is a simple chart.
The horizontal axis shows possible prices of the underlying — for example, index levels from well below to well above the current level.
The vertical axis shows profit or loss on the position, in rupees or points, at each of those prices.
The zero line runs across the middle. Above it, the position makes money; below it, it loses.
The line or curve drawn on the chart answers one question: if the underlying were at this price, what would the position be worth?
Many platforms mark the current price with a vertical line, so you can see where you stand now relative to the range of outcomes.
Breakevens, maximum profit and maximum loss
Breakeven points are where the payoff line crosses zero. Between or beyond them, depending on the shape, the position is profitable or not.
Maximum profit is the highest point of the line. If the line keeps rising to the edge of the chart, profit is unlimited in that direction.
Maximum loss is the lowest point. If the line keeps falling to the edge, loss is unlimited in that direction — the single most important thing to notice on any diagram.
Flat sections show ranges where the outcome does not change with price, typically beyond the strikes of a spread.
Slopes show how quickly profit or loss changes with price. A steep slope means each point of movement matters a lot.
Before any trade, read these four things from the diagram: where are the breakevens, what is the maximum profit, what is the maximum loss, and is either unlimited?
Examples of common shapes
Bought call option: flat at a small loss (the premium) below the strike, then rising to the right without limit. Breakeven is the strike plus the premium.
Bought put option: the mirror image — rising to the left as the price falls, flat at the premium loss above the strike.
Sold put option: flat at a small profit (the premium) above the strike, falling to the left as the price drops. The loss grows as the price falls, down to the point where the underlying reaches zero.
Bull call spread: flat at a small loss on the left, rising between the strikes, flat at a capped profit on the right. Both risk and reward are limited.
Short straddle: a peak at the strike, falling on both sides. Profit is limited to the premium; losses grow in both directions.
Iron condor: a flat-topped plateau in the middle, sloping down on each side to flat floors. Limited profit, limited loss.
Recognising these shapes quickly helps you understand any position, however many legs it has.
Drawing one by hand. It helps to sketch a simple diagram once without software. Take a bull call spread: buy a 24,000 call option for 170 and sell a 24,200 call option for 85, a net cost of 85. Below 24,000, the result is −85. Between 24,000 and 24,200, it rises one point for each point of the index, crossing zero at 24,085. Above 24,200 it flattens at 200 − 85 = +115. Plot those three pieces and you have the diagram. Doing this once makes every platform chart easier to read. The figures are illustrative.
The expiry line and today's line
Most platforms draw two lines.
The expiry line shows the result if the position is held until expiry, when options are worth only their intrinsic value. It has sharp corners at the strikes.
Today's line (sometimes shown for a chosen date) shows the estimated value of the position now, including time value. It is a smooth curve, usually lying between the expiry line's extremes.
The difference matters. A bought option position usually shows a smaller loss today than at expiry if nothing happens, because time value remains. A sold option position usually shows a smaller profit today than at expiry, for the same reason.
Spreads such as butterflies show this most dramatically: the expiry line shows a large peak, while today's line may barely rise above zero until close to expiry.
Always look at both lines. Planning only from the expiry line leads to disappointment when positions are closed early.
What the diagram leaves out
Changes in implied volatility. Today's line is drawn using an assumption about volatility. If volatility rises or falls, the real value of the position will differ. Some platforms let you adjust the assumption; try it.
The path. The diagram shows outcomes at a price, not how the price gets there. A position may hit a stop-loss or a margin shortfall along the way, even if the final price would have been fine.
Costs. Most diagrams do not subtract brokerage, taxes and the bid-ask spread. For positions with small maximum profits, costs can matter a lot.
Probability. The diagram shows what happens at each price, not how likely each price is. A large maximum profit at an unlikely price is less attractive than it looks.
Settlement details. For stock options, physical settlement obligations at expiry are not shown on a payoff chart.
Used with these limits in mind, a payoff diagram is the quickest way to understand the shape of a position before you commit money to it.
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Frequently Asked Questions
What is an option payoff diagram?
A chart showing the profit or loss of an options position at a range of possible underlying prices, usually at expiry and as of today.
How do I find the breakeven on a payoff diagram?
Breakevens are where the payoff line crosses the zero line. A position can have one or two breakevens depending on its shape.
What is the difference between the expiry line and today's line?
The expiry line shows the result at expiry using intrinsic value only. Today's line includes remaining time value and shows the estimated value now.
How do I see unlimited risk on a payoff diagram?
If the payoff line keeps falling to the edge of the chart in either direction, loss is unlimited in that direction.
What does a payoff diagram not show?
Changes in implied volatility, the path the price takes, transaction costs, the probability of each outcome, and physical settlement obligations.
Related Reading
- Turning points into rupees per lot
- Checking a strike is actually traded
- A shape that differs most before expiry
- The plateau-shaped payoff
- Why today's line includes time value
- Vertical spread payoffs in detail
Disclaimer: TheFinBaba provides educational content only - this is not investment advice. Trading involves risk of loss.
