---
title: "admin-ajax.php Statistics: 13.1% of WordPress Homepages - PageSpeed Matters"
url: https://www.pagespeedmatters.com/resources/data-studies/admin-ajax-php-statistics
description: "13.1% of top 1M WordPress homepages (16,171 of 123,500) call admin-ajax.php during load before the visitor does anything, adding uncached server work."
lang: en
---

admin-ajax.php Statistics: 13.1% of WordPress Homepages (https://www.pagespeedmatters.com/resources/data-studies/admin-ajax-php-statistics)

13.1% of top 1M WordPress homepages (16,171 of 123,500) call admin-ajax.php during load before the visitor does anything, adding uncached server work.

Core Web Vitals pass rate, WordPress homepages with vs without an admin-ajax.php call on load

Call admin-ajax.php (14,663) 36.8%

No call (93,159) 50.3%

Source: PageSpeed Matters. HTTP Archive top 1M crawl, Sept 2026, mobile, CrUX field data.

Correlation only; the call often comes with other plugin weight.

Source: admin-ajax.php Statistics: 13.1% of WordPress Homepages - PageSpeed Matters (https://www.pagespeedmatters.com/resources/data-studies/admin-ajax-php-statistics)