When to Disavow Backlinks: The Complete Decision Guide

The Disavow Dilemma#

Google's disavow tool is powerful—and dangerous. Used correctly, it can help your site recover from penalties. Used incorrectly, it can discard links that were actually helping your rankings.

This guide helps you make informed decisions about when to disavow backlinks, when to leave them alone, and how to execute the process correctly.

What the Disavow Tool Does#

Google's disavow tool allows you to tell Google to ignore specific links when evaluating your site for search rankings.

Important: Disavowing links doesn't remove them. They still exist. Third-party tools will still show them. You're just asking Google to discount their influence on your rankings.

How Google Describes It#

Google's official guidance states the disavow tool is for situations where:

• You've done "considerable link spam or paid for links"
• You have a manual action for unnatural links
• You believe low-quality links are causing problems

Google also explicitly warns: "This is an advanced feature and should only be used with caution."

When You SHOULD Disavow#

Scenario 1: Manual Action for Unnatural Links#

Situation: You received a manual action notification in Google Search Console for "Unnatural links to your site."

Action Required: Yes, disavow.

This is the clearest use case. Google has explicitly identified problematic links. You must:

1. Audit all backlinks
2. Remove what you can
3. Disavow what you cannot remove
4. Submit reconsideration request

Scenario 2: Known Link Scheme Participation#

Situation: You (or a previous SEO) participated in link schemes:

• Bought links for SEO purposes
• Used private blog networks (PBNs)
• Engaged in large-scale link exchanges
• Used link farms or automated link building

Action Required: Yes, disavow these specific links.

Even without a manual action, links from known schemes are risky. Disavow proactively to avoid future penalties.

Example: A company hired an agency that built 200 links from a PBN. The agency is gone, but the links remain. Disavow the PBN domains.

Scenario 3: Active Negative SEO Attack#

Situation: You observe:

• Sudden, massive spike in low-quality backlinks
• Links from irrelevant foreign-language sites
• Exact-match anchor text at unnatural rates
• Pattern suggesting deliberate attack

Action Required: Yes, disavow attack links.

While Google claims to mostly ignore negative SEO, protection is prudent when attacks are obvious and sustained.

Approach:

• Monitor continuously during attacks
• Update disavow file weekly with new attack domains
• Focus on clearly spam sources

Scenario 4: Algorithmic Penalty Evidence#

Situation: No manual action, but:

• Significant ranking drop coinciding with algorithm update
• High percentage of clearly toxic links
• Pattern matches known penalty triggers

Action Required: Possibly disavow.

This is more nuanced. Correlation isn't causation—ranking drops have many causes. However, if toxic link percentage is high (20%+), cleanup can help.

Before Disavowing:

• Rule out technical issues
• Check for content quality problems
• Analyze competitor movements
• Confirm links are truly toxic

When You Should NOT Disavow#

Scenario 5: Low-Quality but Not Toxic Links#

Situation: You have links from:

• Small, legitimate blogs
• Low-authority but real websites
• Directory sites that aren't spam
• Old sites with little traffic

Action Required: Do NOT disavow.

Low-quality and toxic are different. A DR 15 site that's a genuine business isn't toxic—it's just small. Google can evaluate these links themselves.

The Risk: Disavowing legitimate links removes value they might provide. One SEO accidentally disavowed 50% of their links based on low spam scores and lost significant rankings.

Scenario 6: Based Only on Tool Spam Scores#

Situation: A tool (Semrush, Moz, etc.) shows links with high "spam scores" or "toxic scores."

Action Required: Do NOT disavow based solely on automated scores.

Third-party spam scores are estimates, not Google's actual evaluation. False positives are common. A manually-reviewed quality assessment should inform disavow decisions, not automated scores alone.

Scenario 7: Competitor Links#

Situation: You want to disavow links pointing to competitors.

Action Required: This doesn't work (and is pointless).

You can only disavow links to your own site. The tool has no effect on competitors.

Scenario 8: Nofollow Links#

Situation: You found toxic-looking links, but they're nofollow.

Action Required: Do NOT bother disavowing.

Nofollow links (in theory) already don't pass ranking value. Disavowing them is redundant and clutters your file.

Scenario 9: Precautionary/Paranoid Disavowing#

Situation: No penalty, no issues, but you want to "clean up" your profile just in case.

Action Required: Generally do NOT disavow.

Unnecessary disavowing is one of the biggest mistakes site owners make. If you're not experiencing problems and haven't done anything risky, leave your links alone.

The Decision Framework#

Step 1: Do You Have a Manual Action?#

Yes: Proceed directly to disavow process (combined with removal attempts).

No: Continue to Step 2.

Step 2: Did You Participate in Link Schemes?#

Yes: Identify and disavow those specific links.

No: Continue to Step 3.

Step 3: Are You Under Active Negative SEO Attack?#

Yes: Disavow clear attack links.

No: Continue to Step 4.

Step 4: Do You Have Significant Ranking Problems?#

No: Do not disavow. Monitor your profile but take no action.

Yes: Continue to Step 5.

Step 5: Have You Ruled Out Other Causes?#

Check for:

• Technical SEO issues
• Content quality problems
• Algorithm updates affecting your site type
• Competitor improvements

Other causes found: Address those first.

No other causes: Continue to Step 6.

Step 6: Is Your Toxic Link Percentage High?#

Audit your backlinks manually (not just automated scores).

Below 10% toxic: Probably not causing problems. Monitor but don't disavow.

10-25% toxic: Consider targeted disavow of clearly problematic links.

Above 25% toxic: Disavow is likely warranted.

How to Execute a Disavow#

Step 1: Complete Audit#

Export all backlinks from:

• Google Search Console
• Ahrefs
• SEMrush
• Moz

Combine and deduplicate for a complete picture.

Step 2: Manual Review#

Evaluate each potentially toxic link manually:

Questions to Ask:

• Is this a real website or auto-generated?
• Is there any editorial oversight?
• Would a human choose to link here?
• Is the link from my industry or completely unrelated?
• Is the anchor text natural or obviously manipulated?

Classification:

| Category | Description | Action | |----------|-------------|--------| | Definitely Toxic | Link farms, hacked sites, obvious spam | Disavow | | Probably Toxic | Very low quality, suspicious patterns | Review carefully, likely disavow | | Uncertain | Low quality but might be legitimate | Do NOT disavow | | Safe | Legitimate sites, editorial links | Do NOT disavow |

Step 3: Attempt Removal (If Manual Action)#

If you have a manual action, document removal attempts:

1. Find contact information for linking sites
2. Send polite removal requests
3. Track responses and outcomes
4. Include documentation in reconsideration request

Step 4: Create Disavow File#

File Format:

• Plain text (.txt)
• UTF-8 encoding
• One entry per line
• Comments start with #

Example File:

# Backlink Disavow File
# Site: yourdomain.com
# Date: 2026-01-20
# Reason: Manual action cleanup

# Link farm - contacted 1/10, no response
domain:spamlinks123.com

# PBN identified - never contacted (clearly fake)
domain:seolinks-network.net

# Hacked site
domain:legitimatesite-hacked.com

# Specific page on otherwise okay site
https://decentsite.com/one-bad-page-with-link

Best Practices:

• Use domain: prefix for clearly spam domains
• Use specific URLs for sites with mixed content
• Include comments explaining why (helpful for reconsideration)
• Keep organized by category or date

Step 5: Submit to Google#

1. Go to Google's Disavow Links Tool
2. Select your property (must verify ownership)
3. Upload your .txt file
4. Confirm submission

Notes:

• New file replaces previous file completely
• Processing takes weeks to months
• You can update anytime by uploading a new file

Step 6: Submit Reconsideration (If Manual Action)#

After cleanup, request reconsideration:

• Acknowledge the problem
• Explain what caused it
• Document cleanup efforts
• Attach evidence (spreadsheet of outreach attempts)
• Commit to following guidelines

Common Disavow Mistakes#

Mistake 1: Over-Disavowing#

Problem: Disavowing too many links, including legitimate ones.

Result: Loss of ranking value from good links.

Prevention: Only disavow clearly toxic links. When in doubt, leave it out.

Mistake 2: Using Only Automated Tools#

Problem: Disavowing everything a tool flags as "toxic."

Result: False positives hurt your profile.

Prevention: Manual review of every link before disavowing.

Mistake 3: Disavowing Without a Reason#

Problem: Precautionary disavowing when nothing is wrong.

Result: Unnecessary risk with no benefit.

Prevention: Only disavow when you have clear evidence of problems.

Mistake 4: Forgetting to Remove#

Problem: Submitting disavow without attempting removal first.

Result: Weakens reconsideration request; leaves removal opportunities unused.

Prevention: Always attempt removal for manual actions before disavowing.

Mistake 5: Set and Forget#

Problem: Submitting disavow once and never updating.

Result: New toxic links (especially during attacks) aren't addressed.

Prevention: Regular monitoring and file updates as needed.

Mistake 6: Wrong File Format#

Problem: Incorrect formatting in disavow file.

Result: Entries not processed, tool errors.

Prevention: Follow exact format requirements; test with small file first.

Post-Disavow Monitoring#

Track Key Metrics#

Rankings: Monitor target keywords for recovery signs. Allow 2-4 months minimum.

Organic Traffic: Watch Google Analytics for traffic changes. Recovery may be gradual.

Search Console: Check for:

• Manual action status changes
• New link warnings
• Index coverage issues

When to Update Your Disavow#

Add to your disavow file when:

• Negative SEO attacks continue
• You discover previously missed toxic links
• New toxic links appear that need addressing

Remove from your disavow file when:

• You realize you over-disavowed
• Links were incorrectly classified
• Sites have improved and are now legitimate

Frequently Asked Questions#

How long does disavow take to work?#

Weeks to months. Google must recrawl and reprocess your links. For manual actions, reconsideration typically takes 2-4 weeks after you request it.

Can I see if Google actually disavowed the links?#

No. Google doesn't report which disavowed links they've processed or how they've affected your rankings.

Should I disavow links from guest posts I wrote?#

Only if the guest posts were on low-quality or PBN sites. Quality guest posts on legitimate publications should not be disavowed.

What if I accidentally disavow good links?#

Upload a new disavow file without those entries. Google will eventually recount them, but this takes time.

Do disavowed links still show in tools?#

Yes. Disavowing only affects Google's evaluation—the links still exist and appear in all tools.

Should I disavow old links from my domain's previous owner?#

If clearly toxic, yes. You inherited those links along with the domain. Clean up problematic ones.

Is there a limit to disavow file size?#

Technically yes (2MB), but you're unlikely to hit it. More important: don't disavow so much that you damage your healthy profile.

The Bottom Line#

The disavow tool is a surgical instrument, not a sledgehammer. Use it for specific, clearly toxic links when you have concrete reasons. Don't use it for general "cleanup" or based solely on automated scores.

Remember:

• Manual action = definitely disavow (after removal attempts)
• Known link schemes = disavow those specific links
• Active negative SEO = disavow attack links
• Just "worried" = monitor but don't disavow

For more on handling toxic links, see our guides on how to remove toxic backlinks and recovering from Google penalties.