How do you calculate the break-even of an option?
Where does an option strategy break even?
The break-even is the price, or price range, at which a strategy makes neither a profit nor a loss at the point in time you are measuring. Depending on the construction, the premium you paid or received shifts that threshold. Multi-leg strategies can have one, two or more break-evens; fees and fills can move the result further.
How it is calculated
On a long call the break-even at expiration is the strike plus the premium paid; on a long put it is the strike minus the premium. For options you sold it inverts: a cash-secured put breaks even at the strike less the credit received. On spreads it is always the net amount of the whole position that counts, never the price of a single leg.
On a debit spread it is the long strike plus the debit paid; on a credit spread it is the short strike, shifted by the credit towards the profit zone. The logic never changes: the underlying has to earn back the net premium first.
Why there can be several
Strategies with legs on both sides have two break-evens: a short iron condor is profitable between them, a long straddle outside them. Butterflies and ratio constructions can produce further thresholds, because the slope of the payoff changes at more than one strike. On a payoff diagram they are exactly the crossings of the zero line.
It also matters which amount the number refers to. Quoted premiums are per share; what actually books is the premium times the contract multiplier. A break-even that looks unremarkable per share can be a three-figure difference per contract.
What the formula leaves out
The break-even applies at expiration. Before then the profit threshold sits somewhere else, because time value and implied volatility are still in the price — a position can be green well before its calculated break-even, or the reverse. Trading costs and the bid-ask spread move it further, and on multi-leg strategies they apply per leg.
Strategies where the term matters
- Covered Call — Are you willing to hand over the shares at the call strike - even if they keep running afterwards?
- 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?
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.