OPTIONS CALCULATOR
Cash-Secured Put calculator
Return on capital, annualized yield, breakeven and assignment cost for selling a cash-secured put. Only sell puts on names you'd want to own at the strike — and size to the full assignment cost.
A cash-secured put earns premium for agreeing to buy the stock at the strike. Max profit is the premium; the real risk is that the stock falls well below your breakeven and you're assigned at a loss versus the market. Only sell puts on names you'd genuinely want to own at the strike, and size to the full assignment cost — not the premium.
FAQ
What is the max profit on a cash-secured put?
The premium collected: premium × 100 × contracts. That's the most you can make; you keep it if the put expires worthless.
What is my breakeven / assignment cost?
Strike minus premium. If assigned, that's your effective purchase price for the shares — below the current strike by the premium you collected.
How much capital does it tie up?
The full assignment cost: strike × 100 × contracts held as cash/buying power. Size to that, not to the premium — the risk is owning the stock if it falls well below breakeven.
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Educational research only. Not financial advice.