What is a good ROI in search arbitrage?
Operators generally describe a sustained return of roughly 10% to 30% on ad spend as healthy, with higher figures possible on small campaigns and lower ones at scale. There is no official benchmark. What matters more is ROI measured on finalised revenue, after clawbacks and costs, and whether it holds as daily spend grows.
ROI is profit divided by spend. Spend $1,000 and receive $1,200 and ROI is 20%. Do not confuse it with ROAS, which here would be 120%, or with profit margin, which is $200 divided by $1,200, or 16.7%. All three describe the same day.
Two cautions. First, ROI on estimated revenue flatters the picture; a 20% estimated ROI with a 10% deduction becomes 8%, because revenue falls to $1,080. Second, ROI usually falls as you scale, since the cheapest clicks are bought first. A 40% return on $50 a day tells you little about what $5,000 a day will earn.