Calculate Returns, Breakeven & Assignment Risk in Real-Time
Sick of spreadsheets? Missing critical numbers before hitting sell? Our cash-secured put calculator shows you exactly what you'll earn, where you break even, and how likely assignment is—all before you place the trade.
✅ Breakeven Price — Where you profit/lose if assigned
✅ Assignment Probability % — Historical odds for this strike/DTE combo
✅ Premium Collected — Exact dollars earned upfront
✅ Annualized ROI — Return if assignment happens
✅ 7-Day ROI — Return before next expiration cycle
✅ Out-of-the-Money % — Safety margin on your entry
Estimate income from selling covered calls or cash-secured puts
Need more capital to start
Try $57,000 or switch strategies
See how much extra you could earn with cash-secured puts vs "safe" alternatives
Ticker, strike price you're selling, current premium, days to expiration, capital reserved
See exact breakeven, historical assignment likelihood, profit if not assigned, profit if assigned
Compare strikes side-by-side, test what-if scenarios, and only trade when the math makes sense
Trader insight: Low assignment risk, solid premium, good ROI. This is a go.
Breakeven Price
$225.50
Assignment Probability
28%
Profit if NOT Assigned
$450
Annualized ROI
33.8%
Master CSP timing and DTE selection
Find high-probability CSP opportunities
Compare both income strategies
Step-by-step execution guide
Extend your positions and compound returns
Use this to work backwards: enter your income goal and see what's required.
Work backwards: set your income goal and find the required capital
A cash-secured put is when you sell a put option while holding enough cash to buy 100 shares at the strike price if assigned. You collect the premium immediately and keep the cash earning zero interest until assignment or expiration.
Breakeven = Strike Price - Premium Collected. Example: You sell a $100 strike put and collect $3 premium. Your breakeven is $97. If the stock falls to $97, you break even. Below that, you lose money.
Assignment probability is the historical likelihood that your put gets assigned (stock drops to strike price and holder exercises). We calculate this from historical data for each stock, strike level, DTE, and implied volatility level.
Shorter DTE = Higher theta decay = More premium collected per day, but less time for recovery if stock drops. Longer DTE = Lower daily decay = Safer, but premium per day is smaller.
Yes. Enter your original strike, premium collected, and current DTE to see profit/loss so far, probability of assignment, and whether rolling makes sense.
No. Higher ROI usually means lower strike (deeper ITM, higher assignment risk) or shorter DTE (less time for recovery). Optimal CSP balances acceptable assignment probability, ROI matching your goals, and capital preservation.
Join traders who are already using our tools to make better decisions.
