Options Profit Calculator
Work out the profit, loss and break-even price at expiry for a call, put or covered call, with the maximum gain and loss the position can produce.
How to use this calculator
- 1Choose the strategy — buying gives limited loss, selling gives limited gain.
- 2Enter the strike, the premium per share and the current price of the underlying.
- 3Enter the price you want to test at expiry to see the payoff in that scenario.
- 4Check the break-even: the underlying has to pass it before a bought option makes anything.
How the calculation works
Long call: (max(0, price − strike) × shares) − premium. Long put: (max(0, strike − price) × shares) − premium. Break-even = strike ± premium- shares
- Contracts × 100 — one contract normally controls 100 shares
- premium
- Paid when buying an option, received when selling one
- break-even
- Strike plus premium for a call, strike minus premium for a put
This is the payoff at expiry only. Before expiry an option also carries time value, so a position can be profitable while the underlying has not yet passed the break-even price — and can lose value even when the underlying moves the right way, if it moves too slowly.
A long option can only lose the premium, which is the entire appeal. A short option reverses that: the premium is the maximum gain and the loss can be many times larger, which is why selling options uncovered is far riskier than buying them.
A covered call caps upside at the strike. The premium is earned in exchange for giving up gains above it, and that forgone upside is a real cost even though it never appears as a loss on a statement.
Worked example
Buying a $100 call for $3.50
- 1.One contract controls 100 shares, so the premium costs $350.
- 2.At $115 the call is worth $115 − $100 = $15 per share, or $1,500.
- 3.Profit is $1,500 − $350 − $0.65 commission = $1,149.35.
- 4.Break-even was $103.50 — the strike plus the premium.
Result: $1,149.35 profit, on $350.65 at risk
The same call finishing at $101
- 1.The call finishes in the money — the share price is above the strike.
- 2.But it is only worth $1 per share, or $100.
- 3.Against a $350 premium that is a $250.65 loss.
- 4.Being right about direction is not enough: the move has to clear the break-even.
Result: A loss, despite finishing in the money
What the payoff actually depends on
An option is a right, not an obligation, to buy (a call) or sell (a put) 100 shares at a fixed strike price until expiry. The buyer pays a premium for that right; the seller receives it and takes on the obligation.
At expiry the arithmetic is simple. A call is worth whatever the share price exceeds the strike by, and nothing if the price is below it. A put is the mirror. The premium then has to be subtracted, which is why the break-even sits at the strike plus the premium for a call, and the strike minus the premium for a put.
The most common beginner mistake follows directly from that. An option finishing "in the money" is not the same as a profitable trade. A $100 call bought for $3.50 that finishes at $101 is in the money and still loses $250, because the $1 of intrinsic value does not cover the $3.50 paid. The underlying has to move past the break-even, not merely past the strike.
Why buying and selling are not symmetrical
The risk profiles of the two sides are wildly different, and the asymmetry is the single most important thing to understand before trading.
- Buying — the most you can lose is the premium, however badly the trade goes. The upside on a call is theoretically unlimited. This bounded loss is the entire appeal, and it is why options are often described as defined-risk.
- Selling covered — a covered call means owning the shares and selling a call against them. The premium is yours to keep, but your upside is capped at the strike — if the stock doubles, you sold it at the strike and forgo the rest.
- Selling uncovered — the premium is the maximum gain while the loss can be many multiples of it. A naked call has theoretically unlimited loss. Brokers require margin and approval for good reason.
Time value, and what this calculator deliberately ignores
Everything above concerns the payoff *at expiry*. Before then an option is worth more than its intrinsic value, because there is still time for the underlying to move. That extra amount is time value, and it decays toward zero as expiry approaches — accelerating in the final weeks.
The practical consequence is that a bought option can lose money even when the underlying moves in the right direction, if it moves too slowly. Time decay works against the buyer every day and for the seller every day, which is the structural reason so many retail option buyers lose money while being broadly right about direction.
Modelling that properly requires an options pricing model and an implied volatility input, which is a different tool from this one. This calculator answers the expiry question — the payoff if held to the end — which is the right frame for a covered call written to expiry, and a floor rather than a full picture for a speculative long position.
What this assumes, and where it stops
Assumptions
- Standard equity options where one contract controls 100 shares.
- The position is held to expiry, so only intrinsic value remains.
- American-style early assignment is not modelled.
- No dividends are paid on the underlying before expiry.
Limitations
- Time value and implied volatility are excluded — this is the payoff at expiry, not the value of the position today.
- Multi-leg strategies such as spreads, straddles and iron condors are not covered.
- Early assignment on American-style options, which is most likely just before an ex-dividend date, is not modelled.
- Tax treatment of options varies by strategy and holding period and is excluded entirely.
Common questions
How do I calculate profit on a call option?
At expiry the call is worth the share price minus the strike, or nothing if the price is below the strike. Multiply by 100 shares per contract, then subtract the premium you paid and any commission. Break-even is the strike plus the premium — so a $100 call bought for $3.50 needs the stock above $103.50 just to break even, not merely above $100.
Why did I lose money when my option finished in the money?
Because finishing in the money only means the option has some intrinsic value, not that it covered what you paid. A $100 call bought for $3.50 finishing at $101 is worth $1 per share — $100 against a $350 premium, a $250 loss. The underlying has to clear the break-even price, which is the strike plus the premium, before the trade makes anything.
What is a covered call and what does it cost me?
You own 100 shares and sell a call against them, collecting the premium. If the stock stays below the strike you keep both the shares and the premium. If it rises above, the shares are called away at the strike and you forgo everything above it. That forgone upside is the real cost — it never shows as a loss on a statement, but in a strong rally it can dwarf the premium earned.
Is selling options riskier than buying them?
Substantially, when uncovered. A buyer can only lose the premium. An uncovered seller collects the premium as their maximum possible gain while facing losses that can be many multiples of it — theoretically unlimited on a naked call. Selling covered, against shares you already hold, is far more conservative: the risk is giving up upside rather than losing more than you put in.
Sources
- Investor Bulletin: An Introduction to Options — US Securities and Exchange Commission
- Characteristics and Risks of Standardized Options — The Options Clearing Corporation
Formula and content last reviewed on .
Results are estimates for information only, not professional advice.
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