Before you buy an option, know the price the stock must reach for you to get your money back. Pick call or put, enter the strike, premium and current stock price — and see the exact breakeven, the % move it demands, and your maximum risk.
Answer first: a long call breaks even at strike + premium; a long put breaks even at strike − premium. This options breakeven calculator applies those formulas at expiration, then adds the context that actually decides trades: how far the stock must travel from where it is now, what you can lose in total, and what a big move would pay.
Call breakeven = Strike + Premium · Put breakeven = Strike − Premium
Example: stock at $100, you buy the $105 call for $3.50. Breakeven = $108.50 — the stock must rise 8.5% just to get your money back. The same logic in reverse: a $95 put for $2.80 breaks even at $92.20, a 7.8% drop.
The premium is a sunk cost, and that single fact explains why options demand bigger moves than beginners expect. At expiration an option is worth only its intrinsic value — the amount it's in the money. The first slice of intrinsic value merely refunds your premium; profit begins only beyond the breakeven. A call that's "right" about direction can still lose 100% if the stock rises but stalls below strike plus premium.
A $3.50 breakeven gap means something completely different on a $30 stock than on a $300 one. That's why this tool converts the gap into a percentage of the current price: it turns "the stock needs to reach $108.50" into "the stock needs to move 8.5%, before expiration, or I lose." Compare that required move against how much the stock typically moves in that timeframe and you have a fast, honest filter for cheap-looking out-of-the-money options — the further the strike, the lower the premium, but the more heroic the move you're betting on.
For an option buyer, the most you can lose is the premium times 100 shares per contract — the calculator shows that number so it's never abstract. It also prices a ±20% move at expiration (up 20% for calls, down 20% for puts): intrinsic value at that price, minus what you paid. This makes the asymmetry visible — limited downside, leveraged upside — while reminding you that the most common outcome for far out-of-the-money options is the limited-downside part.
These formulas describe expiration day. Mid-trade, an option carries time value on top of intrinsic value, so positions are routinely sold at a profit before the stock ever touches breakeven — or at a loss after it has. Time decay, volatility changes and interest rates all move the price along the way. Treat the breakeven as your worst-case anchor: if the stock only reaches your target at expiry, this is the line between red and green.
Reality check: options can and regularly do expire worthless — a 100% loss of premium — and multi-leg strategies, assignment and early exercise add complexity this simple tool ignores. Educational calculator only, not financial advice. See the SEC's introduction to options at investor.gov before trading real money.
Model full P/L curves with the options profit calculator, learn the vocabulary in what is a stock option?, and practice risk-free in the options trading game. Sizing the position? Use the position size calculator and risk/reward calculator first.
Last updated July 2, 2026 · Written by Mustafa Bilgic. Educational only — not financial advice.
Add the premium you paid to the strike price. A $105 call bought for $3.50 breaks even when the stock trades at $108.50 at expiration — below that you lose money, above it you profit, dollar for dollar.
Subtract the premium from the strike price. A $95 put bought for $2.80 breaks even at $92.20 at expiration. The stock must fall below that level for the trade to make money.
Because the premium is a sunk cost. At expiration an option is only worth its intrinsic value, so the first dollars of intrinsic value simply pay back what you spent. Only movement beyond strike-plus-premium (calls) or strike-minus-premium (puts) is profit.
The classic breakeven formula describes expiration day only. Before expiry an option still has time value, so you can often sell for a profit even if the stock has not reached the breakeven price — or at a loss despite being past it. The formula is the worst-case anchor, not a mid-trade rule.