Risk-to-Reward Ratio in Options - What It Tells You and What It Hides
Reviewed by Leon Moyer - Published October 9, 2026 - Last reviewed October 9, 2026
In this lesson
Calculate a trade's risk-to-reward ratio, convert between the risk-to-reward and reward-to-risk conventions, and explain why the ratio must be read together with the chance of profit.
The risk-to-reward ratio compares the most a trade can lose with the most it can make. A trade that risks $148 to make $352 has a risk-to-reward ratio of about 1 : 2.38. The ratio is quick to compute and easy to compare, but it describes only the two extremes, not how likely either one is, which is why it misleads when it is read on its own.
The inputs are the maximum loss and maximum profit from the three numbers for any position.
How do you calculate the risk-to-reward ratio?
Risk to reward is the maximum loss divided by the maximum profit, both measured at expiration for one contract or spread.
There are two conventions, and both are common:
- Risk to reward puts the loss first. Risking $148 to make $352 is 148 : 352, which simplifies to about 1 : 2.38. Smaller first numbers look better.
- Reward to risk puts the profit first: 352 / 148 = 2.38 : 1. Bigger first numbers look better.
The free OptionsPro profit calculator shows Reward : Risk, profit first, so the same spread reads "2.38 : 1" there. Whenever you see a ratio, check which way round it is written before comparing it with anything.
Worked example
Two bullish spreads on XYZ, 30 days, one ratio each
XYZ trades at $50 with 30 days to expiration. Premiums are the calculator's model prices at 30% implied volatility and a 4.5% rate.
Bull call spread (debit): buy the 50 call for $1.81 and sell the 55 call for $0.33, paying $1.48.
- Maximum loss: $148. Maximum profit: $5.00 - $1.48 = $352.
- Reward to risk: 352 / 148 = 2.38 : 1.
Bull put spread (credit): sell the 48 put for $0.81 and buy the 45 put for $0.20, collecting $0.61.
- Maximum profit: $61. Maximum loss: $3.00 - $0.61 = $239.
- Reward to risk: 61 / 239 = 0.26 : 1, or risk to reward of about 3.92 : 1.
On the ratio alone, the debit spread looks about nine times better. Both are bullish, both are priced by the same model, and the next sections show why that comparison is incomplete.
Illustrative and hypothetical. The ticker and prices are invented for teaching, and the figures exclude commissions, fees, margin interest and taxes, which reduce real results. Past or hypothetical outcomes do not indicate future results.
Maximum profit and maximum loss on four vertical spreads
Maximum profit
Maximum loss
Why does the risk-to-reward ratio mislead on its own?
It ignores how likely each outcome is
The debit spread needs XYZ above $51.48 at expiration to make any money. The credit spread makes money anywhere above $47.39, including if XYZ drifts down a little. With the same model inputs, the debit spread's estimated chance of profit is about 37% and the credit spread's is about 73%.
That is the trade-off in one picture: a better ratio usually comes with a smaller chance of collecting it. Buying a far out-of-the-money option makes the point at the extreme. The 55 call alone costs $33 with unlimited upside, an "infinite" reward-to-risk ratio, yet the model gives it only about a 12% chance of finishing above its $55.33 break-even.
Two bullish spreads: a good ratio or a good chance
50/55 bull call spread
Reward : risk 2.38 : 1
Modeled chance of profit: 37%
48/45 bull put spread
Reward : risk 0.26 : 1
Modeled chance of profit: 73%
Gray line: zero, where the position breaks even. Dashed line: strike. Each sketch shows profit or loss at expiration as the stock price rises from left to right.
It treats every win and loss as the maximum
Most trades finish somewhere between the extremes. The bull put spread loses its full $239 only below $45; between $45 and $48 it loses less, and between $47.39 and $48 it makes a little. A ratio built from the two extremes cannot see any of that.
It breaks down when either side is unlimited
A protective put (shares plus a bought put) has a defined maximum loss and no maximum profit, so its reward-to-risk is shown as infinite. A naked short call is the reverse: its risk is unlimited, so there is no ratio at all. The calculator shows "∞" for an unlimited upside and "-" when the downside is unlimited, rather than a misleading finite number.
It leaves out time and capital
A 2 : 1 trade over 7 days and a 2 : 1 trade over 90 days are not equal, and neither are two trades that tie up very different amounts of capital or margin. The ratio has no clock and no account balance in it.
How can you use the ratio without being misled?
Treat it as one input to a decision, not the decision:
- Compare it with the break-even win rate. If a trade only ever made its maximum or lost its maximum, it would need to win more than risk / (risk + reward) of the time to come out ahead. For the debit spread that is 148 / 500, about 30%; for the credit spread, 239 / 300, about 80%. Real trades also end in between, so treat this as a rough check, not a verdict.
- Pair it with the chance of profit. The next lesson, probability of profit, explains where the 37% and 73% come from and what they assume.
- Weigh every outcome. Expected value combines the payoffs and their probabilities into one number, which is what the ratio was trying to be.
- Size from the maximum loss, not the ratio. However attractive the ratio, the maximum loss is what has to fit your risk budget.
Check your understanding
A spread risks $234 to make $66. Write its risk to reward and its reward to risk.
Show answer
Risk to reward is 234 : 66, about 3.55 : 1. Reward to risk is 66 / 234, about 0.28 : 1. They describe the same trade; only the order differs.
Why can a trade with a 0.26 : 1 reward to risk still be a reasonable trade?
Show answer
Because the ratio ignores probability. A credit spread with a low ratio profits across a wider range of prices, so it can win much more often. Whether it is reasonable depends on the probabilities and the expected value, not the ratio alone.
A spread can lose $200 or make $300 and nothing in between. What win rate does it need to break even over many trades?
Show answer
200 / (200 + 300) = 40%. Above that win rate, the all-or-nothing version of the trade comes out ahead before fees.
Key takeaways
- Risk to reward is maximum loss divided by maximum profit; reward to risk is the same comparison flipped. Check which convention you are reading.
- A better ratio usually comes with a lower chance of profit, so the ratio alone cannot rank trades.
- The ratio ignores partial outcomes, time and capital, and it is undefined or infinite when either side is unlimited.
- Use it alongside the break-even win rate, the probability of profit and the expected value, and size every trade from its maximum loss.
Common questions
What is a good risk-to-reward ratio for options?
There is no single good ratio. A ratio only compares the best and worst cases; it says nothing about how likely each one is. A trade that risks $1 to make $2 can be worse than one that risks $4 to make $1 if the second wins far more often. Judge the ratio together with the chance of profit and the expected value.
How do you calculate risk to reward on an option?
Divide the maximum loss by the maximum profit, both at expiration and per contract. For a bull call spread that risks $148 to make $352, risk to reward is 148 : 352, or about 1 : 2.38. Flip the division for reward to risk: 2.38 : 1.
Why do credit spreads have a bad risk-to-reward ratio?
A credit spread sells the option closer to the stock price and buys protection further away, so it collects a small credit and risks the rest of the width. In exchange, it profits across a wider range of prices, so it wins more often. The ratio and the probability move in opposite directions.
Is a 1:3 risk-to-reward ratio good?
It means the best case is three times the worst case. Whether that is good depends on how often the best case happens. Far out-of-the-money options often show large reward-to-risk ratios because they rarely pay off.