Formula
Users who exit at step N / Users who reached step N x 100
How to measure
Track step-by-step funnel completion during onboarding and calculate the drop-off percentage between each consecutive pair of steps.
Why track it
Step-level drop-off data shows exactly where to focus redesign effort instead of guessing which part of onboarding is the problem.
Example
A team finds a 45% drop-off specifically at the 'connect your data' step, prompting a simplification of that integration flow.