---
title: "Core Web Vitals Decay 2026: 19.2% of Passers Now Fail - PageSpeed Matters"
url: https://www.pagespeedmatters.com/resources/data-studies/core-web-vitals-decay
description: "Of 127,675 top 1M sites that passed Core Web Vitals in Sept 2024, 19.2% (24,526) fail in Sept 2026, while 51,045 sites went from failing to passing."
lang: en
---

Core Web Vitals Decay 2026: 19.2% of Passers Now Fail (https://www.pagespeedmatters.com/resources/data-studies/core-web-vitals-decay)

Of 127,675 top 1M sites that passed Core Web Vitals in Sept 2024, 19.2% (24,526) fail in Sept 2026, while 51,045 sites went from failing to passing.

Which metric now fails on sites that lost their Core Web Vitals pass (24,526 sites)

LCP 48.4%

INP 39.9%

CLS 32.6%

Source: PageSpeed Matters. HTTP Archive top 1M crawls, Sept 2024 and Sept 2026, same origins, CrUX p75.

A site can fail more than one metric, so the shares overlap.

Source: Core Web Vitals Decay 2026: 19.2% of Passers Now Fail - PageSpeed Matters (https://www.pagespeedmatters.com/resources/data-studies/core-web-vitals-decay)