Options Profit Calculator

Understanding options profit and loss

An option is a contract that gives you the right — but not the obligation — to buy or sell 100 shares of a stock at a fixed price before a set date. Because a single contract controls 100 shares, small moves in the stock translate into large percentage swings in the option. This calculator turns those moving parts into one clear number: your profit or loss at expiration, plus the payoff chart that shows it across every price.

Calls versus puts: the two building blocks

Every options strategy, no matter how complex, is built from two basic contracts.

Call options

A call gives you the right to buy the stock at the strike price. You buy a call when you think the price will rise. If the stock finishes above the strike by more than the premium you paid, you profit; if it finishes below the strike, the call expires worthless and you lose only the premium. That capped, known downside is why many beginners start with long calls.

Put options

A put gives you the right to sell the stock at the strike price. You buy a put when you expect the price to fall, or to protect shares you already own. A put gains value as the stock drops below the strike, and like a long call your maximum loss is limited to the premium paid.

Strike price and premium: how they relate

The strike price is the fixed price written into the contract. The premium is what the option costs — the market price you pay (or receive) per share. These two numbers are linked: an option whose strike is deep in your favour already has real (intrinsic) value, so it costs a higher premium; an option far out of the money is mostly hope and time value, so it is cheaper but more likely to expire worthless. When you raise the premium in the calculator, watch the breakeven move further away — you have to be more right about direction to come out ahead.

How to read the payoff chart

The chart is the fastest way to understand any options position. The horizontal axis is the stock price at expiration; the vertical axis is your dollar profit or loss. The dashed horizontal line is zero — break-even. Anywhere the curve sits in the green you make money; anywhere it sits in the red you lose. The vertical dashed line marks your breakeven price, and the bright dot is your chosen target. Hover or drag across the chart and the readout on the right updates live, so you can answer questions like what if the stock hits 120? without typing a thing.

The classic hockey-stick shape of a long call tells the whole story at a glance: a flat loss line equal to the premium until the strike, then a 45-degree climb once the stock takes off. A long put is the mirror image, climbing as the price falls.

Buying versus selling (long versus short)

When you buy an option you pay the premium and your loss is capped at that amount, while your upside can be large. When you sell (write) an option you collect the premium up front and keep it if the option expires worthless — but your risk is now larger, and for a naked short call it is theoretically unlimited. Flip the Buy/Sell toggle and watch the max-profit and max-loss boxes swap places; that single switch is the difference between a defined-risk bet and an open-ended obligation.

Breakeven, max profit and max loss

Three numbers define every single-leg trade. Breakeven is where you neither win nor lose. Max loss for a buyer is simply the premium paid — you can never lose more than you put in. Max profit for a long call is unlimited because a stock can keep rising, while for a long put it is capped because a stock can only fall to zero. Knowing all three before you place a trade is the core habit this tool is built to encourage.

A worked example

Suppose a stock trades at 100 and you buy one call with a 100 strike for a 5.00 premium. Your cost is 5 × 100 = 500. Breakeven is 105 (strike plus premium). If the stock finishes at 115 your call is worth 15 per share, so your profit is (15 − 5) × 100 = 1,000 — a 200% return on the 500 risked. If the stock finishes at or below 100, the call expires worthless and you lose the full 500. Type those numbers into the calculator and the chart draws exactly this picture.

Risk and a final word

Options can multiply both gains and losses, and most expire worthless. This calculator shows the mathematics of a position at expiration; it is an educational illustration, not a recommendation or a prediction of where any stock will go. Always size positions you can afford to lose and confirm every figure with your broker before trading.

The math behind options profit

Every options P/L comes down to two numbers: the option's intrinsic value at expiration and the premium you paid or received. For a standard US equity option, one contract controls 100 shares, so:

Long call profit = (max(stock price − strike, 0) − premium) × 100
Long put profit = (max(strike − stock price, 0) − premium) × 100
Call breakeven = strike + premium  ·  Put breakeven = strike − premium

Sellers (short positions) simply flip the sign: the premium is your maximum profit, and the buyer's gain is your loss.

Worked example: a $100-strike call for $3

Say a stock trades at $98 and you buy one call with a $100 strike for a $3.00 premium ($300 per contract). At expiration:

Notice the asymmetry that makes long options attractive: the loss is capped at the $300 premium no matter how far the stock falls, while the upside keeps growing dollar-for-dollar above breakeven.

Why is my option losing money when the stock went up?

Before expiration an option's price also contains time value, which decays every day (theta) and swells or shrinks with implied volatility. A call can drop even as the stock rises if IV collapses — common right after earnings — or if the move is too slow to outrun theta decay. This calculator shows the value at expiration, which is the cleanest way to judge a trade's risk/reward before entering; mid-trade prices will differ.

How are options profits taxed in the US?

Gains on most equity options you buy and sell are capital gains. Because the typical option is held far less than a year, profits are usually short-term and taxed at your ordinary income rate. If you sell covered calls, premiums also generally produce short-term gains, and exercised options adjust the stock's cost basis instead. See our capital gains tax calculator for the brackets, and IRS guidance for special cases like index options (Section 1256 contracts, taxed 60/40).

Common mistakes this calculator helps you avoid

Ignoring breakeven: an in-the-money finish is not the same as a profitable one — the stock must clear strike plus premium. Sizing by contract count instead of dollars: ten $0.30 contracts risk the same $300 as one $3.00 contract, but with far worse odds. Selling naked calls without seeing max loss: flip the calculator to a short call and note the loss keeps growing as the price rises — that's why brokers require margin for it.

Sources: Cboe Options Institute · IRS Publication 550 — Investment Income and Expenses. Last updated: July 9, 2026.