Cash Secured Put Calculator: Estimate Premium Income Before You Sell
Use a cash secured put calculator to estimate your premium income, breakeven price, and probability of assignment before selling your first CSP.
Why Use a Cash Secured Put Calculator?
A cash secured put calculator is a tool that helps you estimate the true income potential and risk of your positions before you enter them. Instead of guessing, you calculate exact premium, breakeven, and yield metrics.
For example, if you're selling a CSP on a $100 stock at a $95 strike for a $2.50 premium, the calculator shows your yield, breakeven ($92.50), and probability metrics — all before you commit capital.
Key Metrics Every Calculator Shows
Here are the core numbers any good cash secured put calculator should compute:
- Premium Income — The total credit received from selling the option
- Breakeven Price — Stock price at which you'd start losing money on the position
- Yield % — Annualized return based on capital at risk and time to expiry
- Probability of Profit (POP) — Estimated chance the option expires worthless
- Max Loss — Worst case scenario if the stock goes to zero
How to Calculate by Hand (Formula)
If you prefer manual calculation, here is the formula for premium yield:
Yield % = (Premium / (Strike - Premium)) / Days_to_Expiry * 365 * 100
For example: Premium = $2.50, Strike = $95, DTE = 30 days
Net capital = $95 - $2.50 = $92.50
Yield = ($2.50 / $92.50) / 30 * 365 * 100 = 32.9% annualized
Using OptionSpeed's Free Tools
OptionSpeed provides free scanner tools that serve as a cash secured put calculator — scan all tickers to find the best CSP candidates by yield, buffer, and DTE in seconds.
Frequently Asked Questions
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What is the breakeven on a cash secured put?
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How to calculate premium on a put?
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