The Payout modifier multiplies the amount from the value parameter by the percentage you set. In other words, this is a ROI calculator.
ROI = ((revenue - costs) / costs) * 100%
![What is Payout modifier? photo 1 What is Payout modifier? photo 1](https://trafficstars.com/files/payout-modifier-flow-infographics-3116x3254_EN.jpg)
For example:
Your conversion value is $5 and you're willing to pay 40% of it for ads. 40% of 5 is 2.
ROI = ((5 - 2) / 2) * 100%) = 150%
Thus, your ROI will be 150%
![](https://downloads.intercomcdn.com/i/o/515713351/1ecadffa852403e8e6920a4a/Payout_modifier_ROI+%281%29.jpg)
⚠️ The conversion value taken from the postback. Therefore, you need to properly set up your conversion tracking.
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