Options Break-Even Calculator
Calculate the exact break-even price at expiry for call and put options based on strike and premium.
Formula
K = strike price, P = premium paid. The underlying must rise above the strike by at least the premium for the call to be profitable.
The underlying must fall below the strike by at least the premium for the put to be profitable.
Expresses the cost of the option relative to the strike price. A useful metric for comparing options at different strikes.
Examples
- Strike (K) = $65,000, Premium (P) = $3,500
- Break-even = K + P = $65,000 + $3,500 = $68,500
- Premium % = $3,500 / $65,000 × 100 = 5.38%
- BTC must rise 5.38% above the strike to profit
- Strike (K) = $3,000, Premium (P) = $200
- Break-even = K − P = $3,000 − $200 = $2,800
- Premium % = $200 / $3,000 × 100 = 6.67%
- ETH must fall 6.67% below the strike to profit
- Strike (K) = $180, Premium (P) = $8
- Break-even = $180 + $8 = $188
- Premium % = $8 / $180 × 100 = 4.44%
- Relatively low premium for an altcoin option
Key Concepts
Why Break-Even Matters
Every long option starts at a loss — you've paid the premium. Break-even tells you the minimum price move needed just to recover your cost. Comparing break-even to your price target helps determine if the risk/reward makes sense before entering the trade.
Premium % as a Quick Filter
Expressing premium as a percentage of strike creates a universal comparison metric. A 3% premium on a BTC call and a 3% premium on an ETH call represent the same proportional cost, even though the dollar amounts differ significantly. Lower premium % means a tighter break-even.
Time Value and Break-Even
An option's premium consists of intrinsic value (if ITM) and time value. The time value component is what makes break-even extend beyond the strike. As expiry approaches, time value decays (theta), which means buying closer to expiry typically gives a tighter break-even but less time for the trade to work.
OTM vs ITM Break-Evens
Out-of-the-money options are cheaper (lower premium) so their break-even is closer to the strike, but the underlying needs to move further to reach the strike in the first place. ITM options have higher premiums but start with intrinsic value. The choice depends on your conviction and probability preference.
Break-Even for Spread Strategies
For single-leg options, break-even is simple (strike ± premium). For spreads (bull call, bear put, iron condor), break-even involves the net premium and multiple strikes. This calculator handles single legs; spread break-evens require more complex calculations.
Comparing Break-Evens Across Strikes
When choosing between strikes, compare break-even prices relative to your price target. A cheaper OTM option has a lower break-even in dollar terms but needs a bigger percentage move to reach it. Run the numbers for each strike to find the optimal risk/reward for your thesis.
How to Calculate Options Break-Even at Expiry
The break-even price for an option at expiry is the simplest and most important pre-trade calculation. For a call option, it's the strike price plus the premium paid — the spot price must exceed this level for you to profit. For a put option, it's the strike price minus the premium — spot must fall below this level.
This calculation only applies at expiry. Before expiry, an option can be profitable even if the underlying hasn't reached the break-even level, because the option retains time value that can be captured by selling. But at expiry, time value is zero and only intrinsic value remains.
Premium as a percentage of strike gives you a quick sense of how far the underlying needs to move. If you're paying 8% of strike in premium, you need an 8% move beyond the strike to break even — a high bar for a short-dated option but potentially reasonable for a longer-dated one with high expected volatility.
Frequently Asked Questions
Is break-even different before expiry?
Yes. Before expiry, you can sell the option at its current market price, which includes time value. You might break even on the trade even if the underlying hasn't reached the expiry break-even level, because the remaining time value offsets part of your premium cost.
Does this include exchange fees?
No, this is the theoretical break-even based on strike and premium only. Exchange trading fees (typically 0.02-0.05% of the option's notional on Deribit) add a small amount to the effective break-even. For precise calculations, add your round-trip fee to the premium.
What's a 'good' premium percentage?
It depends entirely on the expected move and time frame. For monthly BTC options, 3-5% premium for ATM is typical. If you expect a 15% move, a 5% premium offers a 3:1 reward ratio beyond break-even. Compare premium % to your expected move to assess value.
How does IV affect break-even?
Higher implied volatility means higher premiums, which pushes break-even further from the strike. When IV is elevated (high IV percentile), break-evens widen, making it harder to profit. This is why some traders avoid buying options during high-IV periods.