Options Break-Even Calculator

Options break-even is the price the underlying stock (or asset) must reach at expiration for the option buyer to avoid any net loss — after accounting for the premium paid. Understanding break-even is fundamental before entering any options position.

Call option break-even: Break-Even = Strike Price + Premium Paid

Put option break-even: Break-Even = Strike Price − Premium Paid

Variable definitions:

• Strike Price: the price at which you have the right to buy (call) or sell (put) the underlying asset
• Premium: the per-share cost of the option contract (multiply by 100 for one standard US equity contract, which covers 100 shares)
• Total Cost: Premium × 100 (per contract), this is your maximum loss on a long option
• Intrinsic Value at Expiry: (Stock Price − Strike) for calls, (Strike − Stock Price) for puts; zero if out of the money

Profit/loss at expiration — call option:

• If stock < strike: option expires worthless, loss = full premium paid
• If stock = break-even: zero profit, zero loss
• If stock > break-even: Profit per share = Stock Price − Strike − Premium

Profit/loss at expiration — put option:

• If stock > strike: option expires worthless, loss = full premium paid
• If stock = break-even: zero profit, zero loss
• If stock < break-even: Profit per share = Strike − Stock Price − Premium

The Greeks to know for break-even context:

• Delta: how much the option price moves per $1 stock move (calls: 0–1, puts: 0 to −1)
• Theta: daily time decay cost (options lose value daily as expiration approaches)
• IV (Implied Volatility): high IV means expensive premiums, requiring larger stock moves to break even

Worked example — call option: Stock: $145. You buy a $150 call expiring in 30 days for a $3.50 premium.

• Total cost: $3.50 × 100 = $350 per contract
• Break-even at expiry: $150 + $3.50 = $153.50
• If stock reaches $160: profit = ($160 − $150 − $3.50) × 100 = $650
• If stock stays at $145: loss = −$350 (full premium)

Worked example — put option: Stock: $80. You buy a $75 put for $2.00 premium.

• Break-even: $75 − $2.00 = $73.00
• If stock falls to $65: profit = ($75 − $65 − $2.00) × 100 = $800