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title: "51.3% of Sites Have a Good TTFB - the Slow Ones Pass LCP Just 6.3% of the Time - PageSpeed Matters"
description: "What is a good Time To First Byte, and how much does it matter? We checked TTFB across 10.6 million sites and found it sets the ceiling for loading speed: fast-server sites pass LCP 85.3% of the time, slow-server sites just 6.3%."
lang: en
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[51.3% of Sites Have a Good TTFB - the Slow Ones Pass LCP Just 6.3% of the Time](https://www.pagespeedmatters.com/resources/data-studies/ttfb-benchmark)

What is a good Time To First Byte, and how much does it matter? We checked TTFB across 10.6 million sites and found it sets the ceiling for loading speed: fast-server sites pass LCP 85.3% of the time, slow-server sites just 6.3%.

TTFB distribution across the web (mobile)

Good (at or below 800 ms)

51.3% 

Needs improvement (800 to 1,800 ms)

34.9% 

Poor (over 1,800 ms)

13.7% 

Source: PageSpeed Matters analysis of Chrome UX Report field data, 10.6M origins, May 2026.

Just over half the web has a server that answers fast. One site in seven takes more than 1.8 seconds.

Share passing LCP by TTFB band (mobile)

Good TTFB

85.3% 

Needs improvement

59.7% 

Poor TTFB

6.3% 

Source: PageSpeed Matters analysis, mobile 75th-percentile field data, May 2026.

If your server burns 2.5 seconds, you are already over the 2.5-second LCP budget before a single image has loaded.

Source: [51.3% of Sites Have a Good TTFB - the Slow Ones Pass LCP Just 6.3% of the Time - PageSpeed Matters](https://www.pagespeedmatters.com/resources/data-studies/ttfb-benchmark)