The cost of conversion rate optimization can vary greatly depending on the scope and complexity of the project, as well as the experience and expertise of the individuals or agencies you hire. We often work on CRO projects between $3,000 and $10,000 in scope, where one or more pages is optimized over a period of a couple of months.
As for the expected return on investment, that can also vary greatly depending on several factors. Those might include the current conversion rate, the quality of your website and user experience, the specific optimization strategies you employ, and the demand of your products or services. A well-executed CRO campaign can often result in a significant increase in conversion rates and an ROI that far exceeds the cost of the program.