Iron Condor Calculator
Use this free iron condor calculator to model your neutral trade before you place it. Enter your four strikes and net credit to instantly see max profit, max loss, both breakeven prices, and a full P&L diagram.
How to use the iron condor calculator
Enter your four strikes and net credit above and the calculator updates in real time. Here is what each input does.
Enter your put spread strikes
Enter the short put strike (the higher put strike you sold) and the long put strike (the lower put you bought to cap downside risk).
Enter your call spread strikes
Enter the short call strike (the lower call strike you sold) and the long call strike (the higher call you bought to cap upside risk).
Enter the net credit received
Enter the total credit collected for the full iron condor. This is the combined premium from both the put spread and call spread you sold.
Review your results
The P&L diagram updates instantly. Read off both breakeven prices, your max profit zone, and how much you stand to lose if the stock breaks out.
Understanding the iron condor strategy
An iron condor is built by combining two credit spreads: a short put spread below the current stock price and a short call spread above it. You collect premium on both sides and profit from the stock staying range-bound through expiration. Time decay works in your favor every day the stock stays inside your tent.
The strategy is most effective when implied volatility is elevated. High IV means fatter premiums when you open the trade, and if IV contracts after you enter (a common pattern after earnings or macro events), your position gains value even before expiration. This is why iron condors are a staple for traders who focus on volatility rather than direction.
Risk and management
The primary risk is a strong directional move that pushes the stock through one of your long strikes. Most active traders manage iron condors by setting a loss limit before entering, often 2 times the initial credit received. If the stock tests one wing early in the trade, some traders will close the threatened side and roll it to a more comfortable strike. The calculator helps you model these adjustments before you make them by entering new strikes and comparing the resulting risk profile.
When to use an iron condor
Iron condors are well suited for sideways markets, range-bound ETFs, and situations where a high-IV event like earnings has passed and the stock is expected to settle down. They are less appropriate for trending stocks or periods of sustained market volatility where large moves become more likely. Because the profit zone is limited to the region between your two short strikes, wider strikes improve your probability of profit but reduce the credit you collect.
Iron condor example with real numbers
Here is a worked example you can enter directly into the calculator above to see the full P&L diagram in action.
Trade setup: XYZ stock trading at $100.00
Common mistakes when running iron condors
Iron condors are defined-risk and probability-friendly, but losing trades cluster around the same handful of avoidable errors. Watch for these before you sell the spreads.
1. Selling short strikes too close to the money
The wider the gap between the spot price and your short strikes, the higher the probability that price stays inside both wings until expiration. Selling 0.30 delta short strikes pays a fatter credit, but it also raises the chance one side gets tested. Many traders use short strikes around 0.15 to 0.20 delta to buy more cushion at the cost of smaller credit. Compare credit received against probability of profit in the calculator above before you click sell.
2. Setting wings too narrow for the credit collected
A 5-point wide iron condor that pays 1.00 has a 4-to-1 risk-to-reward ratio. One tested side can wipe out four winners. Wider wings (10 wide, 20 wide) collect proportionally less credit but carry less max-loss-to-credit risk. Run a 5-wide spread and a 10-wide spread side by side in the calculator to see how max loss shifts even when credit per side stays similar.
3. Holding through earnings or other binary events
Implied volatility expands ahead of earnings, FDA decisions, and Fed announcements. The credit you collected the day before reflects that elevated IV. Once the event prints, IV crushes and price often gaps past one of your shorts. Holding a condor through these events flips the trade from a positive theta and negative gamma position into a directional bet on a single outcome. Many condor traders close before the event or skip the cycle entirely.
4. Ignoring early management at 25 to 50 percent of max profit
Iron condors collect roughly the same theta in the first half of the trade as the second half, but the second half is where gamma risk grows. Closing at 25 to 50 percent of max credit locks in the easy theta and frees up buying power for the next trade. Holding to expiration to squeeze the last few dollars often gives those dollars back when one side moves against you in the final week.
5. Using too much buying power on one ticker
Iron condors look low-risk because most expire worthless, but the loss profile is asymmetric. A 10-point wide condor that pays 2.00 risks 800 to make 200. If a full max loss would exceed 1 to 2 percent of your account, the trade may be too large. That sizing leaves room to take the next trade after a loss. Stacking multiple condors on the same ticker correlates the risk and turns a normal price move into a portfolio-level event.
6. Failing to defend or close a tested side
If price moves against the call side and the short call goes in the money, that wing is no longer earning theta. Common defense moves are rolling the untested put spread up to collect more credit, closing the threatened side, or closing the whole position. Doing nothing and hoping for a reversal is the costliest mistake on this list. Set your defense rules before you put the trade on, not after spot has already moved.
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Iron condor calculator FAQ
Common questions about the iron condor strategy and how to use this calculator.
An iron condor is a four-leg options strategy that combines a short put spread below the stock price and a short call spread above it, both with the same expiration date. You collect a net credit upfront and profit if the stock stays between your two short strikes through expiration. All four legs expire worthless at max profit. It is a neutral strategy that profits from range-bound price action and time decay.
The maximum profit is the net credit received when you opened the trade, multiplied by 100 shares per contract. This is achieved when the stock closes anywhere between your two short strikes at expiration, causing all four legs to expire worthless. For example, if you collected $1.50 in net credit on one contract, your max profit is $150. You cannot make more than the initial credit regardless of where the stock closes within the profitable zone.
The maximum loss is the width of the breached spread minus the net credit received, multiplied by 100. If both wings are the same width, the formula is: spread width minus net credit, times 100. For example, with $5-wide spreads and $1.50 in net credit, max loss is $350 per contract ($5.00 – $1.50 = $3.50, times 100). You can only lose on one wing at a time since the stock can only move in one direction at expiration.
An iron condor has two breakeven points. The lower breakeven is the short put strike minus the net credit received. The upper breakeven is the short call strike plus the net credit received. Using the example above: a $90 short put and $110 short call with $1.50 credit gives a lower breakeven of $88.50 and an upper breakeven of $111.50. The stock must close between those two prices at expiration for the trade to be profitable.
Iron condors work best when you expect a stock or ETF to remain range-bound through expiration and when implied volatility is relatively elevated so you collect a meaningful credit. They are popular on broad market ETFs like SPY and QQQ during sideways markets, and on individual stocks after a major catalyst like earnings has passed. The key risk is a sustained directional move that pushes the stock through one of your long strikes, so they are less suited to strongly trending markets or high-uncertainty environments.
This calculator is for educational and informational purposes only. Options trading involves substantial risk and is not suitable for all investors. Past performance is not indicative of future results. Always consult a licensed financial professional before making investment decisions.