Options Breakeven Price Calculator
· 4 min read
The breakeven price of a long call is the strike plus the premium paid, and the breakeven of a long put is the strike minus the premium paid. For a vertical spread, the breakeven sits at the strike of the option you bought, shifted by the net debit or credit. The calculator below handles single calls, single puts, and vertical spreads, and also shows max gain and max loss at expiration.
Options breakeven calculator
Pick a single leg or a vertical spread, choose call or put, then enter strikes, premiums per share, and the number of contracts. For a spread, the first strike and premium are the option you buy, and the second pair is the option you sell. Results update as you type. All values assume the position is held to expiration, and one contract controls 100 shares.
Illustrative example with round numbers: buy a 100 call at 4.00 and sell a 110 call at 1.50. The net debit is 2.50, the breakeven is 102.50, the max gain is 750 and the max loss is 250 for one contract. These numbers are not a trade idea.
Breakeven formulas
Single long call: breakeven equals strike plus premium paid. Single long put: breakeven equals strike minus premium paid. A short call or short put uses the same breakeven price, because the seller keeps the premium only until the price crosses that level.
Debit call spread (bull call spread): breakeven equals the lower strike plus the net debit. Debit put spread (bear put spread): breakeven equals the higher strike minus the net debit. Credit spreads follow the same pattern with a net credit. A bull put credit spread breaks even at the short strike minus the net credit, and a bear call credit spread breaks even at the short strike plus the net credit.
Max gain and max loss by structure
A long call has a defined loss equal to the premium paid, and its gain is unlimited in theory because the price has no upper bound. A long put has a defined loss equal to the premium paid, and its gain is capped at the strike minus the premium because the price cannot fall below zero.
A short naked call has a gain capped at the premium received and an unlimited loss in theory. A short put has a gain capped at the premium and a loss capped at the strike minus the premium.
A debit vertical spread has a max loss equal to the net debit and a max gain equal to the strike width minus the net debit. A credit vertical spread has a max gain equal to the net credit and a max loss equal to the strike width minus the net credit. Multiply each figure by 100 and by the number of contracts to get dollars.
Assumptions and limits
The calculator reports the position as of expiration only. Before expiration the position can be worth more or less than the expiration payoff because of time value and implied volatility, so the breakeven here is not the price where the position shows zero profit today.
It ignores commissions, fees, and slippage, which move the true breakeven slightly. It also ignores early exercise and assignment, which can change the outcome of a short option or a spread leg. Check your broker’s rules and the contract specifications for details such as multipliers, adjusted contracts, and settlement style.
The spread mode assumes both legs share one expiration and one option type. Other structures such as straddles, butterflies, and iron condors need a different payoff calculation.
Risk note
Trading involves risk of loss, and options can expire worthless. Selling options without a hedge can produce losses larger than the premium received. This tool is for education and arithmetic only, and nothing here is a recommendation to buy or sell any contract.
Summary
Breakeven is strike plus premium for a call, strike minus premium for a put, and the long strike shifted by the net debit or credit for a vertical spread. Use the calculator to check breakeven, max gain, and max loss before sizing a position.
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