Options Breakeven Calculator

An options breakeven calculator tells you the exact price the underlying asset must reach at expiry for an options trade to neither profit nor lose money. It is used by traders and investors to set realistic targets and assess whether a trade makes sense before placing it.

How to Use the Options Breakeven Calculator

1. Select whether you are trading a call option or a put option.
2. Enter the strike price of the option.
3. Enter the premium paid per share (or contract value divided by lot size).
4. The calculator computes the breakeven price automatically.
5. Compare the breakeven price to the current underlying price and to your price target to evaluate whether the trade is realistic.

The Formula

Call Option Breakeven = Strike Price + Premium Paid

Put Option Breakeven = Strike Price - Premium Paid

For a call option, you profit when the underlying price exceeds the strike plus what you paid for the option. For a put option, you profit when the underlying falls below the strike minus the premium. The premium is expressed per share, so a premium of £2.50 on a call with a £50 strike gives a breakeven of £52.50 per share.

Real-World Example

You buy a call option on a FTSE 100 constituent trading at £48. The option has a strike price of £50 and you pay a premium of £2.00 per share. The contract covers 100 shares, so your total outlay is £200.

Breakeven = £50 + £2.00 = £52.00

The stock must rise above £52.00 by expiry for you to make a profit. If the stock is at £55 at expiry, your profit is (£55 - £52) x 100 = £300. If the stock closes below £52 at expiry, your loss is limited to the £200 premium paid.

For a put option with the same £50 strike and a £2.00 premium, the breakeven is £50 - £2.00 = £48.00. You profit if the stock falls below £48.

Using Breakeven with Other Options Metrics

Breakeven price is most useful when combined with probability analysis. Knowing that your breakeven is £52 means little without understanding how likely the stock is to reach that level by expiry. Implied volatility and the delta of the option both inform this assessment. The probability that an option expires in the money is roughly equivalent to its delta. A call with a delta of 0.25 has approximately a 25% probability of finishing above the strike, though the stock still needs to exceed the breakeven price (strike plus premium) for the position to profit. Comparing breakeven levels across different strikes and expiry dates helps you select the trade structure that best matches your price view and risk appetite.

Frequently Asked Questions

What happens if the stock is at the breakeven price at expiry? If the stock is exactly at the breakeven price at expiry, you recover your premium but make no profit and no loss. In practice, transaction costs mean you would be very slightly out of pocket.

Does breakeven change if I sell the option before expiry? Yes. If you sell the option before expiry and receive a higher premium than you paid, your effective breakeven changes. For example, if you paid £2.00 and sell the option for £3.00, you have profited by £1.00 per share regardless of the underlying price at that moment.

Is the breakeven the same as my profit target? No. Breakeven is the minimum price needed to avoid a loss. Your profit target should be higher (for a call) or lower (for a put) than the breakeven, reflecting the return you need to justify the risk.

Can I have multiple breakeven points? Yes, for spread strategies such as straddles, strangles, and vertical spreads, there are typically two breakeven points, one on each side of the current price. Multi-leg strategies require calculating the net premium paid or received across all legs.

A call and put ladder at one premium

A single breakeven figure hides how quickly the required move grows as the strike moves away from the current price. Holding the premium at 2.00 and walking a ladder of strikes shows the shape, with the underlying at 48.00.

Two effects work against each other down the column. A higher call strike costs less in intrinsic terms, so a fixed premium buys a cheaper option further out, but the distance the underlying has to travel grows faster than the premium falls. The 45 strike needs a 2.08% fall to break even on the call, which is inside the range the stock may travel in a quiet week. The 60 strike needs a 29.17% rise, which is a different order of event.

The put column shows the mirror. A put at the money breaks even at the strike, because the premium equals the intrinsic value, and every step further down the strike adds distance without adding certainty. Reading the two columns together is the quickest way to see which side of the market the premium is pricing more cheaply.

Two-leg structures carry two breakevens

Strategies that hold more than one option have a breakeven on each side, and the arithmetic runs on the net premium.

The spread row is the exception in the breakeven columns. A structure that buys one call and sells another has a single breakeven rather than two, because its payoff turns positive at one price and then flattens at the upper strike instead of crossing back.

The straddle needs the underlying to move 8.00% in either direction before the position pays, because the two premiums add and both legs have to be paid for. The strangle costs less and needs a 5.21% fall or a 19.79% rise, so the two sides are not symmetric: the lower strike sits closer to the current price than the upper one, and the cheaper structure simply moves the nearer threshold further out.

Note where the maximum profit column is blank in the ordinary sense. A long straddle and a long strangle profit without a ceiling in either direction, because a large move makes one leg worth far more than the two premiums cost. The spread is the opposite case. Its profit stops at 3.00 per share once the underlying passes the upper strike, and that cap is the price of the lower entry cost. A spread with a net debit of 2.00 against a 5.00 strike width has a reward to risk ratio of 1.50 to 1, and it reaches that maximum at expiry at 55.00 or above.

The straddle's worst case is worth stating plainly. Pinned at exactly 50.00 at expiry, both legs expire worthless and the position loses the whole 4.00 per share, which is 800 on a hundred-share lot. The strangle loses 2.50 per share in the same situation, which is 250.

Breakeven is not the same as the market's odds

Delta is often read as the probability that an option finishes in the money, and that reading gives an upper bound on the chance of profit rather than the figure itself. The distinction matters because breakeven sits beyond the strike for any option bought for a premium.

For the 50 strike, the option has to finish above 50.00 to be in the money at all, and above 52.00 to cover its own cost. The gap between those two prices is where the market's probability reading stops being useful, and for a cheap option with a wide strike-to-breakeven gap the difference is substantial. The 55 strike shows the extreme case, where the option becomes profitable only after a 16.35% rise.

This is the reason a trader comparing breakevens across a ladder is really comparing two things at once: the price the underlying has to reach, and how far that price sits beyond the point where the option stops being worthless. A long option on a volatile underlying can have a lower breakeven in cash terms and a lower chance of reaching it, because the market prices the move it expects.

What a breakeven figure leaves out

The breakeven price assumes the position is held to expiry and the underlying settles at that price. Several real costs sit outside that assumption.

Commissions and the bid-offer spread are paid on entry and again on any exit before expiry. A two-way spread of a few pence per share on a 1.00 premium is a meaningful fraction of the position's edge, and the true breakeven after costs sits a little above the printed figure.

Dividends affect calls and puts differently, because a call holder does not receive the dividend paid during the option's life and the underlying price usually falls by the amount on the ex-dividend date. Early assignment is a related risk for the short side of a spread, since an option with little time value left and a dividend approaching can be exercised early.

The expiry payoff also ignores what happens before expiry. A position can be closed early at a profit that the expiry curve would not show, and time value means an option that is at a loss on the expiry diagram can sit at a gain on the screen. The calculator described on this page is an expiry tool, and reading it as a forecast is the mistake most likely to cost money.

Source: the Black-Scholes model for the relationship between delta and the probability of finishing in the money, as used on the Options Greeks page linked below.

Also try these free tools:

• Black-Scholes
• Options Greeks
• Covered Call