51.3% of Sites Have a Good TTFB - the Slow Ones Pass LCP Just 6.3% of the Time

    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