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irs.gov

https://irs.gov

C74
Performance 30Accessibility 100SEO 100Best Practices 100

14 technologies detected · Last audited Apr 16, 2026

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Technology stack

Analytics

Google Analytics Google Tag Manager

Backend

PHP

Cdn

F5 BigIP

Cms

Drupal

Frontend

AddToAny Bootstrap Cloudflare Google Search Console HSTS Lodash Open Graph jQuery jQuery UI

Frequently asked questions about irs.gov

What technology does irs.gov use?

irs.gov is built with Drupal, AddToAny, Bootstrap, Cloudflare, and Google Search Console.

Is irs.gov fast?

No — irs.gov scores 30/100 on Lighthouse mobile performance, indicating significant optimization opportunities.

Is irs.gov accessible?

Yes — irs.gov scores 100/100 on Lighthouse accessibility, meeting most WCAG-aligned automated checks.

What CMS does irs.gov use?

irs.gov runs on Drupal 10.

Where is irs.gov hosted?

irs.gov is served through F5 BigIP.

Does irs.gov use HTTPS?

Yes — irs.gov serves traffic over HTTPS.

2 audits

Apr 16, 2026 17:55 UTC Latest

/

Worker: worker-madrid-spain-03

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Scores

Performance 30Accessibility 100Best Practices 100SEO 100PWA 0

Timing

LCP: 9.31 sFirst Contentful Paint: 3.53 sTTFB: 1.18 sTotal Time: 1.18 sCumulative Layout Shift: 0.359
Apr 7, 2026 20:41 UTC

/

Worker: worker-singapore-sg-01

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Scores

Performance 26Accessibility 100Best Practices 100SEO 100PWA 0

Timing

LCP: 11.09 sFirst Contentful Paint: 2.79 sTTFB: 561 msTotal Time: 582 msCumulative Layout Shift: 0.357

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