Formula
(Revenue attributed to campaign - Campaign cost) / Campaign cost x 100
How to measure
Track sign-ups or sales using a unique discount code or link tied to the influencer, then compare attributed revenue against the total cost of the partnership.
Why track it
Influencer ROI turns a often-fuzzy brand channel into a measurable one, letting a founder decide which partnerships are worth repeating.
Example
A $2,000 influencer sponsorship generating $9,000 in attributed sales reports a 350% campaign ROI.