Reach forecasts are estimates, not guarantees, since a post reaches a fraction of a creator's followers. Brands estimate by summing each creator's typical reach, average views or a share of followers based on recent posts, not the raw follower count, then discount for overlap. Treat the number as a range.
How do brands forecast the reach of an influencer campaign before it actually launches?
Forecasting reach before launch is useful as long as everyone treats it as an informed estimate, not a promise, since actual reach depends on the algorithm on the day. The honest method starts from real behaviour, not vanity numbers. For each creator, base the estimate on their recent typical performance, average views or median reach on comparable posts, rather than their follower count, since a post typically reaches only a slice of followers. Sum those across your roster for a gross figure, then discount for audience overlap, because creators in the same niche share followers and you will double-count if you ignore it. Add a sensible range rather than a single number, reflecting that any given post can over or under-perform. And separate reach from impact, since reaching people is not the same as moving them. Flinque helps by giving the real audience and engagement data these estimates should be built on, which lets a forecast rest on each creator's actual reach rather than an inflated follower total, though the launch-time result will always vary.