Cash-Secured Put Calculator
A cash-secured put generates income by selling the right to buy stock below the current price. You collect premium upfront and either keep it or buy shares at a price you already chose.
How a Cash-Secured Put Works
You sell a put option on a stock you'd be willing to own, and set aside enough cash to buy 100 shares at the strike price if assigned. You collect the premium immediately. If the stock stays above your strike at expiration, the put expires worthless and you keep the premium. If the stock falls below your strike, you buy 100 shares at that price — which you already decided was acceptable.
Maximum Profit, Maximum Loss, and Breakeven
Maximum profit: The premium received. In the example, $120. This is the most you can make regardless of how high the stock goes.
Maximum loss: (Strike price − premium received) × 100. In the example: ($45 − $1.20) × 100 = $4,380. This occurs if the stock falls to zero — identical risk to buying the stock at $43.80.
Breakeven at expiration: Strike price minus premium. In the example: $45 − $1.20 = $43.80.
When to Use a Cash-Secured Put
A cash-secured put works best when you want to buy a stock at a lower price than it currently trades. Selling the put at your target entry pays you to wait. It also works well when implied volatility is elevated — higher IV means more premium collected for the same obligation. If IV drops after entry, the put loses value faster, which benefits the seller.
Read the cash-secured put strategy guide →