Iron Condor Calculator: Max Profit, Max Loss, and Breakeven Points Explained
The iron condor is probably the most popular defined-risk, non-directional strategy in options trading. It's also the strategy most traders calculate incorrectly — because they forget that it's two separate credit spreads stitched together, and each side has its own risk math.
I've traded iron condors on SPY weekly for three years. The difference between consistent profitability and blowing up your account comes down to understanding exactly three numbers before you enter: max profit, max loss, and your two breakeven points.
Here's every formula you need, with a real SPY example worked through to the penny.
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What Is an Iron Condor?
An iron condor is four simultaneous options positions:
You collect a net credit upfront, and your goal is for the underlying to stay between your two short strikes through expiration. If it does, all four options expire worthless and you keep the full credit.
It's a bet on range — you're saying "SPY will stay between X and Y for the next Z days."
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Iron Condor Max Profit Formula
Max Profit = Net Credit Received × 100 × Number of Contracts
That's it. Your max profit on an iron condor is the net credit you collect when you open the trade. No matter how far the underlying stays inside your range, you can't make more than the credit.
The net credit is:
``` Net Credit = (Short Put Premium − Long Put Premium) + (Short Call Premium − Long Call Premium) ```
Or equivalently:
``` Net Credit = Put Credit Spread Premium + Call Credit Spread Premium ```
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What Is the Max Loss on an Iron Condor?
Max Loss = (Width of Wider Spread − Net Credit) × 100 × Number of Contracts
The "width" is the distance between the strikes on one side. If your call spread is $5 wide and your put spread is also $5 wide (the most common setup), the formula simplifies:
``` Max Loss = (Spread Width − Net Credit) × 100 × Contracts ```
Critical detail: If your spreads are different widths (say, $5 on the put side and $10 on the call side), your max loss is based on the wider spread. You can only lose on one side at a time — the stock can't be above your call spread AND below your put spread simultaneously — so the wider side is your worst case.
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How Do You Calculate Iron Condor Breakeven?
An iron condor has two breakeven points:
``` Upper Breakeven = Short Call Strike + Net Credit Received Lower Breakeven = Short Put Strike − Net Credit Received ```
If the underlying is between these two prices at expiration, you're profitable. Outside either one, you're losing money — with max loss hit when the underlying moves past either long strike.
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Complete SPY Iron Condor Example
Let's walk through a real trade. SPY is trading at $567.50, and you want to sell a weekly iron condor with 7 DTE.
The trade (5 contracts):
| Leg | Strike | Premium | Action |
Calculating the net credit:
``` Put spread credit = $1.60 − $0.85 = $0.75 Call spread credit = $1.45 − $0.72 = $0.73 Net credit = $0.75 + $0.73 = $1.48 per contract ```
Your three numbers:
``` Max Profit = $1.48 × 100 × 5 = $740.00
Both spreads are $5 wide, so: Max Loss = ($5.00 − $1.48) × 100 × 5 = $1,760.00
Upper Breakeven = $575 + $1.48 = $576.48 Lower Breakeven = $560 − $1.48 = $558.52 ```
Your profit zone: SPY stays between $558.52 and $576.48.
That's a $17.96 range, or about 3.16% of SPY's price. For a 7-day trade, that's reasonable — SPY's average weekly move is about 1.5-2.0%.
Risk-to-reward ratio: $1,760 / $740 = 2.38:1. You're risking $2.38 for every $1 of potential profit. This means you need to win more than 70% of the time to be profitable — which is typical for iron condors.
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Iron Condor Payoff Diagram (Text Walkthrough)
Here's what the P&L looks like at various SPY prices at expiration:
| SPY at Expiration | Put Side P&L | Call Side P&L | Total P&L (5 contracts) |
The key insight: the payoff is flat between your two short strikes. Whether SPY finishes at $561 or $574, you make the same $740. The P&L only changes when SPY moves past a short strike.
Wait — why is max loss different on each side? Because the put credit spread collected $0.75 while the call credit spread collected $0.73. When you lose on the put side, you still keep the call side's $0.73 credit (and vice versa). So the actual max loss is less than the theoretical max loss on each side individually.
Let me recalculate precisely:
``` Max loss if put side breached = ($5.00 − $0.75) × 100 × 5 − ($0.73 × 100 × 5 gain from call side expiring worthless) = $2,125 − $365 = $1,760
Max loss if call side breached = ($5.00 − $0.73) × 100 × 5 − ($0.75 × 100 × 5 gain from put side expiring worthless) = $2,135 − $375 = $1,760 ```
Both sides produce the same max loss. This always holds when spreads are the same width.
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How P&L Changes Mid-Trade (The Greeks Impact)
Iron condors don't go from max profit to max loss overnight. The P&L curve evolves over time, and three Greeks drive mid-trade behavior.
Theta (Time Decay) — Your Best Friend
As an iron condor seller, theta works for you. Each day, all four options lose extrinsic value. In our SPY example:
Practical implication: Many traders close iron condors at 50% of max profit ($370 in our example) rather than holding to expiration. This reduces holding period, frees up capital, and avoids the gamma risk of the final days.
Gamma — Your Worst Enemy Near Expiration
Gamma measures how fast delta changes. For short iron condors, high gamma means your P&L can swing wildly when the underlying moves near your short strikes in the final days.
At 7 DTE, a $2 SPY move might cost you $100-150 per contract if you're near a short strike. At 1 DTE, that same $2 move could cost $300-400 per contract. This is why the last 1-2 days are the most dangerous despite having the most theta.
Vega — The Volatility Factor
When implied volatility rises, all four options increase in value. Since you're net short options, a volatility spike hurts you. Specifically:
``` Vega Impact = Net Vega × IV Change × 100 × Contracts ```
A typical 5-wide SPY iron condor at 7 DTE might have a net vega of -$0.08 per contract. If IV jumps 3%, you lose about $0.24/contract, or $120 on 5 contracts. Not catastrophic, but it matters.
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When to Adjust: The Math Behind Rolling
If SPY moves to $574 — dangerously close to your $575 short call — you have three choices:
1. Close the full position. If you can buy it back for $0.90 credit loss (originally sold for $1.48), you lock in a $0.58/contract profit, or $290 on 5 contracts. Not max profit, but profitable.
2. Roll the untested side. The put spread at $555/$560 is nearly worthless. Buy it back for $0.05 and sell a new put spread at $565/$570 for $0.60. You've collected an additional $0.55 credit, which widens your breakeven on the call side to $577.03.
3. Close the threatened side only. Buy back the $575/$580 call spread for $2.80, locking in a loss of $2.80 − $0.73 = $2.07 per contract on that side. Your put spread is still alive with $0.75 credit. Net trade P&L if puts expire worthless: +$0.75 − $2.07 = −$1.32 per contract, or −$660 total. Still less than max loss of $1,760.
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Testing Iron Condors with OptionsPilot's Backtester
The formulas above tell you what happens on a single trade. But the real question is: does this iron condor setup produce consistent results over hundreds of trades?
That's where OptionsPilot's free backtester comes in. You can test iron condors on SPY with 30 years of historical data:
The backtester shows you win rate, average P&L, max drawdown, Sharpe ratio, and a complete trade log. You'll see how the strategy performed during 2008, COVID, and the 2022 bear market — not just in calm conditions.
This is how you move from "iron condors sound profitable" to "I know my iron condor setup wins 72% of the time with an expected value of $0.34 per dollar risked."
Try it free at optionspilot.app/backtester — no signup required.
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FAQ
What is the max loss on an iron condor?
Max Loss = (Width of the wider spread − Net Credit Received) × 100 × Contracts. For a typical $5-wide iron condor sold for $1.48 credit on 5 contracts, max loss is $1,760. You can only lose on one side at a time.
How do you calculate iron condor breakeven?
Upper Breakeven = Short Call Strike + Net Credit. Lower Breakeven = Short Put Strike − Net Credit. The underlying must stay between these two prices at expiration for you to profit. In our SPY example: $576.48 upper, $558.52 lower.
Is an iron condor profitable?
Iron condors are profitable when the underlying stays within your profit zone. With 16-delta short strikes and weekly expirations on SPY, win rates typically range from 65-80%. However, the risk-to-reward is inverted (risk $2-3 to make $1), so a few big losses can wipe out many small wins. Backtesting your specific setup is essential — try the free backtester at optionspilot.app to see historical performance.
What is the best width for iron condor spreads?
For SPY, $5-wide spreads are most common for smaller accounts, and $10-wide for larger accounts. Wider spreads collect more credit but increase max loss proportionally. The key metric is credit-to-width ratio: aim for 25-35% (e.g., $1.25-$1.75 credit on a $5-wide condor) to maintain a favorable risk profile.
Should I close my iron condor early or hold to expiration?
Most experienced iron condor traders close at 50% of max profit. In our example, that's $370 profit instead of waiting for $740. The math supports this: you capture 50% of profit in roughly 40% of the time, which means higher annualized returns. It also avoids the gamma risk explosion in the final 1-2 days.