How this builder works
Each leg you add is a single option — a long or short call or put — with its own strike, premium and contract count. The builder works out the profit or loss of every leg at a given underlying price, adds them together, and plots the result across the whole price range. Long legs cost you their premium; short legs pay you theirs.
Because an option's value at expiration is a straight line once it is in or out of the money, the combined payoff is always made of straight segments that bend at the strike prices. Max profit and max loss therefore sit at one of those bends — or run off to infinity when a side of the position is uncapped. Breakevens are simply the prices where the line crosses zero.
What a payoff diagram shows
A payoff diagram answers one question: if I hold this position to expiration, what is my profit or loss at each possible stock price? The horizontal axis is the underlying price; the vertical axis is dollars of profit or loss. Where the line sits above zero you make money; below zero you lose. It is the clearest way to compare two structures before you trade — a wide condor against a tight one, or a spread against a single option.
Reading the diagram
- Flat sections are price ranges where your P&L does not change — every option there is either fully in or fully out of the money.
- Sloped sections are where the position gains or loses as the stock moves.
- Kinks happen exactly at strike prices, where one leg switches between worthless and in-the-money.
- Zero crossings are your breakevens.
- A line that keeps rising or falling at the edge of the chart means an unlimited profit or loss on that side.
Worked example
A fixed, hypothetical illustration — not live market data. It matches the position the builder loads with so you can follow the math.
The builder loads a bull put spread on a hypothetical stock trading at $100: a short put at the $95 strike collecting $2.00, and a long put at the $90 strike costing $1.00.
- Net credit: $2.00 collected − $1.00 paid = $1.00 per share, or $100.
- Max profit: $100 — if the stock holds at or above $95 both puts expire worthless and you keep the credit.
- Max loss: $400 — at $90 or below. The strikes are $5 apart ($500), less the $100 credit.
- Breakeven: $94 — the short $95 strike minus the $1.00 credit.
That is the signature shape of a defined-risk credit spread: a flat profit shelf to the right, a flat loss floor to the left, and one sloped section between the strikes.
Common mistakes
- Reading it as a before-expiration picture. The diagram is the expiration outcome. Before then, time value rounds off the kinks.
- Forgetting commissions. A four-leg position pays four commissions to open and potentially more to close. The diagram is before fees.
- Ignoring early assignment. A short leg that goes in-the-money can be assigned before expiration, especially around ex-dividend dates.
- Misjudging unlimited risk. More short calls than long calls means the loss has no ceiling as the stock climbs.
- Confusing net credit with max profit. They are equal for a simple credit spread, but not for every structure.
- Unbalancing the legs by accident. Different contract counts on each leg change the shape — a ratio spread is not a vertical spread.
Frequently asked questions
What is an options payoff diagram?
It is a chart of a position’s profit or loss at expiration across the full range of underlying prices. The flat and sloped sections show exactly where the position makes money, loses money, and breaks even.
How many legs can I add?
Up to four option legs — enough for vertical spreads, straddles, strangles, butterflies and iron condors. Set a leg’s type to "None" to leave it out of the position.
How are max profit and max loss calculated?
The builder evaluates the combined P&L at every strike and at a zero underlying price; the highest is the max profit and the lowest is the max loss. If the position holds more long calls than short calls, the upside is unlimited.
What does net credit or net debit mean?
It is the cash to open the position: you collect premium on short legs and pay it on long legs. A net credit pays you up front; a net debit costs you up front.
Does this include stock positions or commissions?
No. It models option legs only, at expiration, before commissions and fees. For stock-plus-option trades such as a covered call, use the covered call or cash-secured put calculators.
Why does my position show an unlimited loss?
A combination with more short calls than long calls loses more and more as the stock rises, with no cap. A naked short call is the classic example. The builder flags this as "Unlimited".
Is the diagram the position value before expiration?
No. It shows profit and loss exactly at expiration. Before expiration, time value and implied volatility make the real curve smoother and rounded; this tool shows the final-day outcome.
Related tools and guides
New here? This builder is our free options profit calculator — that page has a plain-English overview and per-strategy starting points. For single-strategy detail, use the Covered Call Calculator or the Cash-Secured Put Calculator. To repair a short put that has gone against you, see the Rolling Decision Calculator.
New to the strategies behind these legs? Read Covered Call vs. Cash-Secured Put and How to Choose a Strike Price, or define any term with the options glossary.
Educational tool only. Nothing here is financial advice. Multi-leg options positions carry the risk of significant loss — understand assignment and size positions accordingly before you trade.