Member tool
Put Visualizer
See exactly what selling a put pays you — your profit and loss at expiry, your breakeven, what assignment really costs you, and a rough chance of profit.
Your trade
Type in the numbers from your broker screen. Everything updates as you type.
What the stock is trading at right now.
Enter a stock price above zero.
The price you'd agree to buy the stock at.
Enter a strike price above zero.
The bid on your broker screen — what you collect for each share (×100 per contract).
Enter a premium of zero or more.
How many days until the option expires. Zero means it expires today.
Enter zero or more days.
Profit / loss at expiry
Per contract, depending on where the stock finishes on expiry day.
How the math worksEvery formula, in one line each
Put Visualizer: questions
Straight answers about the trade this tool maps.
What does selling a cash-secured put mean?
You sell someone the right to sell you 100 shares at the strike price, and you set aside enough cash to buy them. The premium is yours to keep either way. If the stock stays above the strike, the put expires worthless; if it finishes below, you buy the shares. The full walkthrough is in our cash-secured puts guide.
How is the breakeven on a short put calculated?
Breakeven is the strike minus the premium you collected per share. The stock can fall by the full premium before the trade loses a dollar at expiry. Below breakeven, every dollar the stock drops is a dollar lost per share, the same as owning the stock from that price.
What happens if my put is assigned?
You buy 100 shares per contract at the strike, using the cash you set aside, and you still keep the premium. Your real cost per share is the breakeven, not the strike. What to do the morning after is covered in what happens when you get assigned.
What does the chance of profit estimate mean?
The tool works backwards from the premium to the market's implied volatility, then estimates the chance the put expires worthless. It assumes the option is fairly priced, so treat it as a rough guide to how the market is pricing the move — never a promise about what the stock will do.
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