Interaction to Next Paint, or INP, measures a page’s responsiveness using qualifying interactions during a visit. It considers the delay until the next visual update after an interaction. Google’s good threshold is 200 milliseconds or less at the 75th percentile of visits. Source: web.dev: Interaction to Next Paint

A booking search example

Imagine a customer changing the number of travellers. Observe whether the control responds promptly and shows that the selection has changed. Then separately record how long the supplier results take to return. INP is not a stopwatch for the whole supplier search. Source: web.dev: Interaction to Next Paint

Give your website team a reproducible task

Record the page, device, control and sequence that felt unresponsive. Include whether a filter panel or calendar was open, because that makes the same interaction easier to test again.

After an improvement, repeat the sequence with the same traveller details. Also try changing the selection back, so the review covers the correction a real customer might make rather than only the first click.

Written and updated by Travelgenix. Sources checked on 16 October 2026. Worked examples and checklists are editorial illustrations and recommendations, not customer results.