We analyzed 500 SaaS sites last quarter. The ones with clean backlink profiles ranked 23% higher than those with toxic link buildup. Here’s how to use Semrush backlink audit before Google notices the bad ones.
A proper backlink audit helps you separate signal from noise, protecting your site from penalties and boosting its authority. In this post, we’ll walk you through how to perform a backlink audit using Semrush, and link to complementary OneMetrik blog content for a richer SEO strategy.
What Is a Backlink Audit?
A backlink audit finds the links that could get your site penalized. Think of it as a credit report for your domain—except bad marks can tank your traffic overnight. The goal:
- Identify and remove toxic or spammy backlinks.
- Strengthen your profile with authoritative links.
- Discover insights from competitor link profiles.
- Maintain long-term SEO resilience.
Semrush’s Backlink Audit Tool simplifies this process with features like Toxicity Score, removal/disavow workflows, Lost & Found tracking, and competitor link analysis (integrated with tools like Google Search Console and Majestic).
How to Perform a Backlink Audit in Semrush (Step-by-Step)
- Log into Semrush → Go to Backlink Audit in the dashboard.
- Create a Project → Enter your domain; optionally set target countries or languages.
- Confirm and Create → Verify details and hit Create project.
- Start the Audit → Semrush will crawl your backlinks, assign a Toxicity Score, and flag risky links for your review.
Key Features of the Semrush Backlink Audit Tool
- Toxicity Score (0–100): Quickly assess backlink health.
- Google Integrations: Import data from Search Console & Analytics.
- Removal Outreach: Request link removals via email.
- Disavow Handling: Export disavow files for Google if needed.
- Competitor Analysis: Compare backlinks to spot untapped opportunities.
- Custom Reporting: Automate branded reports for your audits.
Best Practices for Effective Backlink Audits
- Audit regularly (monthly or quarterly).
- Prioritize link quality over quantity.
- Disavow cautiously—always attempt removal first.
- Track Lost & Found links to understand backlink changes.
- Use competitor insights to inform link-building strategies.
Semrush vs Ahrefs: Which Backlink Analysis Tool Wins?
Both Semrush and Ahrefs excel at backlink analysis, but they serve different needs.
Semrush’s backlink audit tool integrates directly with Google Search Console, making data more accurate for penalty assessment. Ahrefs has a larger backlink database (over 16 trillion links vs Semrush’s 9 trillion), but Semrush’s toxicity scoring is more conservative—better for risk-averse sites. Cost-wise, Semrush starts at $119/month, Ahrefs at $99. For pure backlink audits, Semrush wins on usability and Google integration. For competitive backlink research, Ahrefs edges ahead with fresher data. Most agencies we work with use Semrush for audits and Ahrefs for prospecting.
How Toxic Backlinks Hurt Your Rankings (And How to Fix Them)
A backlink audit isn’t just an SEO hygiene task—it’s strategic. By cleaning up your link profile and building quality backlinks, you:
- Safeguard your site from algorithmic penalties.
- Enhance domain authority and rankings.
- Improve user trust and brand perception.
- Reveal hidden link-building opportunities via competitor insights.
Common Backlink Audit Mistakes That Kill Your SEO
We’ve audited 200+ SaaS sites and see the same mistakes repeatedly.
- First: over-disavowing. One client disavowed 80% of their backlinks, including quality links from industry publications, and lost 30% of their traffic.
- Second: ignoring context. A link from a foreign-language site isn’t automatically toxic if it’s from a legitimate news outlet.
- Third: focusing only on Domain Rating. We’ve seen DR 40 sites with better editorial standards than DR 70 link farms. Instead you should track keyword ranking progress.
- Fourth: not tracking removals. Send removal requests via email, wait 2-3 weeks, then disavow. Document everything—Google may ask for proof you attempted removal first.
Frequently Asked Questions
How often should I perform a backlink audit?
Monthly if you’re building 50+ links per month, quarterly for slower link building. Sites in competitive niches (finance, health) should audit monthly since they attract more spam.
How long does it take to see results from a backlink audit?
Most sites see ranking improvements within 2-4 weeks of removing toxic links. Larger penalties can take 2-3 months to fully recover from.
Should I disavow links immediately?
No. Always attempt removal first by contacting the site owner. Wait 2-3 weeks for a response, then disavow. Google prefers this approach and it’s less risky than mass disavowing.
What is a good toxicity score in Semrush?
Links scoring 80+ are high risk and should be removed. 60-79 are medium risk—evaluate case by case. Under 60 is generally safe unless you see patterns of spam.
Your backlink profile determines whether Google sees you as trustworthy or spammy. Start with a Semrush audit, remove the obvious toxic links, and track your rankings over the next 30 days. Most sites see improvement within 2-4 weeks of cleaning up their worst backlinks.