An option breakeven calculator finds the underlying price at which a position recovers its cost and starts to profit, computed per share and then scaled by the 100-share contract multiplier. For a long call it’s strike plus premium paid; for a long put, strike minus that premium. Spreads, covered calls, and multi-leg trades each shift the line predictably, and some structures (a straddle or an iron condor) carry two zero-points, not one. This page is the hub for every common formula, with one comparison table so you can read any structure fast. It’s for education, not financial advice.
For a capital-efficient twist on covered-call breakevens, see the poor man’s covered call.
What this calculator computes
The tool takes your strike (or strikes), the net premium paid or received, and the structure type, then returns the price (or two prices) where profit and loss net to zero at expiration. Inputs are simple: the per-share cost or net credit/debit, and, for stock-backed trades like a covered call, your share cost basis. Output is a level in dollars per share.
Option Breakeven Calculator
Find the breakeven price for any single call or put, or for a two-leg vertical spread. Enter the underlying price, strike, premium, and days to expiration to see the exact breakeven, the dollar and percent move the stock must make to get there, the net debit or credit, and how much premium the option loses to time decay each day. Premium defaults to the Black-Scholes theoretical value so the calculator returns realistic numbers on load.
Recommended tools and brokers
This calculator finds the breakeven price of a single call or put, or a two-leg vertical spread, at expiration using standard US options conventions (100 shares per contract). The breakeven is exact at expiration; before expiration the price needed to break even is different because of remaining time value, implied volatility, and theta. The default premium, the theta decay note, and any probabilities use the Black-Scholes model and are estimates, not guarantees, assuming European-style exercise and no dividends. The vertical-spread breakeven assumes you buy the first strike and sell the second of the same type; for unusual leg combinations verify the formula against your broker. This tool does not model early assignment, dividends, commissions, bid-ask slippage, or mid-trade P&L. For education only, not financial advice. Verify every trade with your broker before placing it.
A few assumptions are baked in. These are US-listed equity options, where one contract controls 100 shares, so a $2.50 premium is $250 per contract. Results sit at expiration, ignoring commissions and time value still in the option mid-trade. Dividends and interest are set aside. Who’s it for? Anyone sizing a trade who wants to know how far the stock must move before it pays.
How to use the calculator
The math behind it
The zero-profit price is where your payoff curve crosses the line. Premium sets the offset; the trade direction sets which way it points. Here are the formulas, per share. Multiply any figure by 100 for dollars per contract.
- Long call: strike + premium paid. A $100 call bought for $3 clears at $103.
- Long put: strike minus premium paid. A $100 put bought for $3 turns positive at $97.
- Covered call: cost basis minus premium received. Stock at $50, sell a call for $1.50, basis drops to $48.50.
- Cash-secured put: strike minus premium received. Sell a $45 put for $1.20, net long at $43.80 if assigned.
- Bull call (debit) spread: long strike + net debit. Pay $2 net for a 100/105 spread, level is $102.
- Credit spread: short strike plus or minus net credit. A put spread sits below it; a call spread above it.
- Long straddle: two levels, strike plus total cost and strike minus total cost. Buy the $100 straddle for $6, profit below $94 or above $106.
- Iron condor: two levels, short put strike minus net credit and short call strike + net credit. Collect $2 on a 90/95 put and 105/110 call condor, keep money between $93 and $107.
Worked example, a long call. You buy one 100-strike call for $3.00. The level lands at $103 per share. Max loss is the $300 you paid if the stock stays at or below $100. Profit above $103 is theoretically unlimited. The grid below reconciles the dollars.
| Stock at expiration | Call value (per share) | P&L per contract |
|---|---|---|
| $97 | $0 | -$300 |
| $100 | $0 | -$300 |
| $103 | $3 | $0 (breakeven) |
| $106 | $6 | +$300 |
| $110 | $10 | +$700 |
Return on risk is profit divided by capital at risk. For the long call, risk is the $300 paid, so a move to $106 returns 100%. Two Greeks matter here: delta (how fast the option gains as the stock moves) and theta (daily time decay working against a long option). A covered call adds positive theta on the short leg. The Options Industry Council publishes free strategy mechanics at the Options Industry Council for a neutral source.
Single breakeven vs two breakevens: a comparison
The cleanest way to group strategies is by how many zero-points they have. Directional trades carry one. Non-directional trades that profit either way, or from no move at all, carry two. The table maps each to its formula and count.
| Strategy | Breakeven formula (per share) | Breakevens |
|---|---|---|
| Long call | strike + premium | One (directional, up) |
| Long put | strike – premium | One (directional, down) |
| Covered call | cost basis – premium | One (directional, down) |
| Cash-secured put | strike – premium | One (directional, down) |
| Bull call (debit) spread | long strike + net debit | One (directional, up) |
| Credit spread | short strike +/- credit | One (directional) |
| Long straddle | strike +/- total premium | Two (move either way) |
| Iron condor | short put – credit; short call + credit | Two (range-bound) |
When does the simpler single-point trade win? When you actually have a directional view. A long call needs the stock above one price; a straddle needs a move large enough to clear either of two, so you pay for both sides and the line sits further out. The dual-point structures earn their keep only when you’re unsure of direction (straddle) or expect the stock to stall in a range (condor). For capital and margin treatment, see the margin option calculator.
Risk and assignment
The zero-point tells you where profit starts, not how much you can lose. A long call or put can lose 100% of its cost if it expires worthless. Short legs change the picture: a cash-secured put or covered call can be assigned early, often around an ex-dividend date, and a short option carries assignment risk any time it’s in the money. Defined-risk spreads and condors cap the loss at the width minus the credit, yet that loss can still exceed the credit received.
Pin risk is real when the stock closes right at a short strike: you may not know whether you’ll be assigned. Capital matters too, since a cash-secured put ties up the full strike value while a spread only requires the width. Read the OCC’s risk disclosure, “Characteristics and Risks of Standardized Options,” at the Options Clearing Corporation before trading any of these. Results here sit at expiration; before then, theta and vega push the mark off intrinsic value. To estimate upside, pair this with the option gain calculator or run the position through our options trading calculator. An option breakeven calculator is your first sizing tool; the risk numbers are the second half.
FAQ
How do you calculate breakeven on an option?
Breakeven is the strike adjusted by the premium. For a long call, add the premium to the strike; for a long put, subtract it. Trades that collect a credit move the line the other way, and spreads use the net debit or credit instead of a single leg’s price.
Why do some strategies have two breakevens?
Two appear when a position can lose money on both an up move and a down move. A straddle profits only if the stock travels far enough either way, so it has an upper and a lower point. An iron condor flips that: it profits inside a range, loses outside it.
Does breakeven include commissions?
The standard formulas ignore commissions and fees. To get your true number, add per-contract fees to the cost on a debit trade, or subtract them from the credit on a sold trade. On small premiums those cents per share shift the line noticeably.
How does the 100-share multiplier affect breakeven?
The multiplier doesn’t change the price, only the dollar amounts. The level is always quoted per share, so a $3 premium moves it $3 regardless of size. The 100x factor turns that into $300 of cost and each $1 of favorable move into $100 of profit per contract.
Is the interactive calculator available yet?
The interactive option breakeven calculator is coming soon. For now, use the formulas and the comparison table above to find any structure’s level by hand. Once the widget is live, you’ll enter strikes and premiums and read both single and dual zero-points instantly.
