The 2026 Domain Authority Study: Insights from 1,000,000 Domains
We aggregated and analyzed anonymized authority metrics for 1,000,000 domains in our global index database. Our objective was to evaluate how Domain Authority (DA) correlates with backlink quantities, spam risk score frequencies, and Core Web Vitals.
Key Study Findings
| Domain Authority (DA) Band | Avg. Referring Domains | Avg. Spam Score |
|---|---|---|
| 0 - 20 (New Sites) | 14 domains | 1.2% |
| 21 - 40 (Growing Authority) | 280 domains | 2.3% |
| 41 - 60 (Established Platforms) | 3,240 domains | 3.1% |
| 61+ (Industry References) | 85,600 domains | 4.8% |
Core Takeaways for Marketers
1. The Diminishing Link Return Curve: To move from a DA of 10 to 20 requires a relatively low number of referring domains. However, moving from DA 50 to 60 requires a logarithmic leap in backlink acquisition, highlighting the importance of high-authority digital PR over bulk spam links.
2. Spam Score Trends: Higher-authority domains exhibit a slight increase in average Spam Score. This is not due to active manipulation, but because large domains naturally attract scraper links, duplicate content scrapers, and unmoderated forum mentions.
