B
Evidence Grade B
Graded
under review
Safe to Cite
Current
23%
23% -- ranking performance difference for Websites with fewer than 10% non-2xx errors (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
23%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Ahrefs
Primary
Tier C
https://anypost.ai/blog/http-status-codes-for-seo-200-301-302-404-and-410-explained ↗
Source Article
HTTP Status Codes for SEO: 200, 301, 302, 404, and 410 Explained
Original Research
Ahrefs
· Original study ↗
Methodology
Ahrefs study on HTTP status errors and search rankings, cited secondhand in blog FAQ
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Websites with fewer than 10% non-2xx errors: 23% ranking performance difference. Source: Ahrefs (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/non-2xx-errors-ranking-boost-ahrefs
HTML Embed
<blockquote cite="https://lighthousedata.io/data/non-2xx-errors-ranking-boost-ahrefs" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>23%</strong> -- ranking performance difference for Websites with fewer than 10% non-2xx errors<br><small>Source: Ahrefs (2026) · <a href="https://lighthousedata.io/data/non-2xx-errors-ranking-boost-ahrefs" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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