Migrate Core Web Vitals monitoring and dashboards from First Input Delay (FID) to Interaction to Next Paint (INP)
domain: web.dev · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Note that INP officially became a Core Web Vital on March 12, 2024, replacing FID as the responsiveness metric
Remove FID-based panels fed by Search Console, since FID was pulled from the Core Web Vitals report immediately on the March 12 cutover
In CrUX API and PageSpeed Insights consumers, migrate field references from first_input_delay to interaction_to_next_paint (tools offered roughly a 6-month grace period before fully dropping FID)
Update any custom RUM pipeline to capture INP, which scores every interaction's full lifecycle rather than only the first input's delay
Re-baseline 'Good' thresholds against INP's own thresholds rather than reusing FID's, since the two metrics aren't directly comparable
Known gotchas
FID and INP scores are not equivalent — a site that historically passed on FID can fail on INP because INP captures every interaction across the session, not just the first
Search Console dropped FID immediately on March 12, 2024 while PSI/CrUX kept it available longer, so tools in the same pipeline could disagree for months
Third-party CWV dashboards may still reference deprecated FID fields even after first-party Google tools moved on
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