Break-Even Price¶
The break-even price is the underlying asset price at which an options position produces exactly zero profit or loss at expiration. For a long call it equals the strike price plus the premium paid; for a long put it equals the strike minus the premium. Multi-leg positions net all premiums into one or two break-evens that bracket the position's profit zone.
HOW IT WORKS¶
Break-even formulas vary by structure:
| Position | Formula |
|---|---|
| Long call | Strike + premium paid |
| Long put | Strike − premium paid |
| Short call | Strike + premium received |
| Short put | Strike − premium received |
| Debit call spread | Long strike + net debit |
| Credit put spread | Short strike − net credit |
| Long straddle | Strike ± total premium (two break-evens) |
| Iron condor | Short put strike − net credit / short call strike + net credit (two break-evens) |
The break-even price translates an options position into a required underlying move, making it possible to compare candidate trades on equal footing and to judge whether that move is realistic against the expected move implied by current option prices. Note that break-even math describes the expiration outcome only — before expiration, a position can be profitable below its break-even if implied volatility rises or the underlying moves quickly, and commissions and bid-ask spread shift the true break-even further against the trader.
Example: AAPL trades at $232. A trader buys the $235 call for $4.50; break-even is $239.50, a 3.2% rally required. Buying the $235/$245 bull call spread for a $2.70 net debit lowers the break-even to $237.70 (2.5% move required) but caps profit above $245.
IN TAPEBOARD¶
Tapeboard calculates and displays break-even price automatically for single-leg and multi-leg positions as you build a trade in the options chain. The break-even line is overlaid on the expiration payoff diagram so you can see at a glance how far the underlying must move. When managing open positions — such as rolling a covered call — Tapeboard recalculates the position break-even after each roll to track effective cost basis. You can stress-test break-even math across strategies in the paper trading simulator before committing capital.