Naked Put Calculator

By Yojana Mandon · Updated June 2026 · 2 min read · Risk disclaimer

A naked (short) put sells a put to collect premium without setting cash aside. It profits if the stock stays above the strike, with substantial risk if it falls sharply.

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Key characteristics

• Max profit = premium received. Loss grows as the stock falls below the strike.
• Breakeven = strike − premium.
• Higher margin requirement and risk than a cash-secured put.

How it differs from a cash-secured put

A naked put has the same payoff shape as a cash-secured put, but you do not set the full cash aside — the broker holds margin instead. That leverage boosts return on capital but magnifies risk if the stock falls.

Because the position is margined rather than cash-backed, a sharp decline can trigger a margin call, forcing you to add funds or close at a loss.

Risks and management

Your loss grows as the stock falls below the strike, all the way down (a stock can in theory go to zero), offset only by the premium collected. This is not a beginner trade.

Manage it with strict position sizing, and consider buying a cheap further-OTM put to convert it into a defined-risk bull put credit spread.

On the Greeks, the Naked Put is vega-negative — a fall in implied volatility (such as an earnings IV crush) works in your favour, and theta-positive, so time decay adds to the position each day it is held.

Managing the trade and common mistakes

Most experienced traders close a naked put early once it has captured roughly 50–80 % of the maximum credit. Theta decay accelerates as expiration approaches, but so does gamma risk — a sharp move against you in the final days can erase weeks of premium collection in hours. If the put moves deep in-the-money and you still believe in the underlying, rolling down and out (buying back the current put and selling one at a lower strike in a further expiration) buys time and collects additional credit. If the thesis has changed, taking the loss and moving on is almost always preferable to doubling down.

The most common mistake beginners make is treating the naked put as a 'free money' trade because the probability of profit appears high at entry. They sell far too much notional exposure relative to account size, then freeze when the stock sells off. Position sizing is everything: a single naked put controls 100 shares, so the real risk is equivalent to owning that stock outright with no downside hedge. A second mistake is ignoring implied volatility — selling a put when IV is depressed means collecting a thin premium for substantial risk.

Assignment is not a risk to fear if you are prepared for it, but surprises do happen. A naked put can be assigned early if the option goes deep in-the-money and the remaining extrinsic value falls near zero, particularly around ex-dividend dates when early exercise becomes rational for the put holder. If you are not willing or able to take delivery of 100 shares per contract, you must close or roll before that point. Also watch bid-ask spreads: illiquid puts can carry wide spreads that make rolling expensive and turn a theoretical profit into a realized loss.

Calculate it live

Use the free OptionProfit Naked Put calculator to load a live option chain, build the trade, and instantly see the payoff chart, breakevens, probability of profit, Greeks and a Monte Carlo simulation of outcomes.

Frequently asked questions

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