What a disavow file actually is
A disavow file is a plain-text file you submit through Google Search Console that tells Google to ignore specific backlinks or referring domains when evaluating your site. Google introduced it in October 2012, partly as a response to the Penguin algorithm rolling out earlier that year, partly to give site owners a way to recover from manual link penalties.
The file format is plain text, UTF-8 encoded. Each line is either a single URL or a whole domain, with the domain syntax being domain:example.com. Lines starting with # are comments. The disavow tool processes the file inside days, but the ranking impact takes weeks to months because Google has to re-crawl the listed URLs and re-evaluate the link graph.
In the early years of the tool, every SEO with a manual action filed a disavow. Through 2015-2019 it became a standard part of a routine audit. Since 2020 Google has steadily walked back its own recommendation. The current public guidance is that most site owners should not need to file a disavow because SpamBrain handles the algorithmic side automatically. Manual actions for unnatural links still exist but have grown rarer, and the recovery process for them still includes a disavow.
When the disavow still makes sense
Two scenarios where a disavow file is the right call:
Scenario 1: A confirmed manual action
If Search Console reports a manual action for "Unnatural links to your site", you have a confirmed problem and the disavow is part of the reconsideration process. The shape: identify every link that contributed to the action, attempt to get them removed at source, disavow everything you could not remove, submit a reconsideration request explaining what you did and what you changed about your link practices going forward. This scenario is rare for businesses that have not run paid-link campaigns. We see it about once every two years across our Perth client base.
Scenario 2: An obvious negative-SEO pattern
Negative SEO is when a competitor or bad actor points a large volume of low-quality links at your site to try to harm your rankings. The pattern is usually obvious: a sudden cluster of dozens or hundreds of links from one foreign-language network, often pointing at the same money page, often with exact-match commercial anchor text. Most of these get ignored by SpamBrain automatically. If you see a ranking drop coinciding with the link influx and SpamBrain has not absorbed it inside 60 days, the disavow is appropriate. This scenario is rarer than agencies pretend (most "negative SEO panic" we get called in for turns out to be a normal algorithm update).
One additional scenario worth a mention. If you have inherited a site from a previous owner who clearly ran black-hat link campaigns, the legacy profile is sometimes worth a one-off audit and selective disavow. The criterion is the same: only disavow links that are clearly spammy and that you can show have not been algorithmically ignored.
When the disavow is the wrong call
Five situations where a disavow risks hurting the site more than helping it:
1. A routine link profile with a few low-quality links
Most sites have a long tail of low-quality links from scraper sites, parked domains, accidental directory placements, and odd referrers. None of it is moving rankings up or down. Disavowing the whole tail is busy-work that can occasionally catch a link that was actually counting. The correct response is to leave it.
2. A ranking drop coinciding with a core update
Core updates happen four to six times a year. Every time one rolls out, sites that lost rankings blame the link profile and rush to disavow. Usually the cause is content quality, helpful-content signals, or topical authority shifts, not links. Diagnosing the actual cause first is essential. The SERP performance chapter covers how to read a ranking drop.
3. A "toxic links" report from a third-party tool
Several SEO tools assign a "toxicity score" to each link in your profile. Those scores are heuristic algorithms run by the tool vendor, not signals Google sees. Tools regularly flag legitimate editorial links as toxic because they share surface features with low-quality patterns. Disavowing on the basis of a toxicity score alone is one of the easiest ways to remove links that were doing actual work.
4. Pre-emptive disavow on a fresh acquisition
If you acquire a domain and the previous link profile is mixed, the temptation is to disavow everything that looks suspicious before launching your new content. This usually removes both the bad links and the good ones, and you start the new site with a weaker link foundation than you had to. Better: audit, leave it, monitor, only disavow what is clearly hostile.
5. As a routine quarterly process
Some agencies run a quarterly disavow as a standing line item on the retainer. That is busy-work disguised as service. In 2026 the disavow is an event-driven tool, not a maintenance one.
Step-by-step disavow process
If you have decided the disavow is the right call, the steps:
- Export the full link profile. Search Console first (External links report, full export). Then a second source: Ahrefs Free, Semrush Free or Moz Link Explorer for cross-reference.
- Build an exclusion list of definitely-good links. Industry associations, news coverage, supplier and customer references, anything obviously editorial. These never go on the disavow file.
- Identify the bad-link patterns. Look for clusters: many links from one network, foreign-language sites in irrelevant beats, exact-match commercial anchor text in suspicious volumes, low-quality directories, comment-link bursts.
- Attempt removal first. For sites with contact details, send a polite removal request. Document every attempt. Google's current guidance still asks site owners to attempt removal before disavowing.
- Build the disavow file. Plain text, UTF-8. Domains preferred over individual URLs because they cover future links from the same source. Format:
domain:example.comone per line. Comments with#. - Review the file before submitting. Read every line. Confirm you have not accidentally included a legitimate referring domain.
- Submit through Search Console. Open the disavow tool, select the property, upload the file. Google confirms upload immediately. Processing takes days; ranking impact takes weeks to months.
- Monitor for 90 days. Track referring domains, rankings, organic traffic. Compare against the pre-disavow baseline.
Safer alternatives to disavowing
Three alternatives that are usually better than a disavow:
Wait for SpamBrain. For most low-quality links, the algorithm absorbs the signal inside 30-60 days and there is nothing more to do. If your rankings are stable after a link influx, the algorithm has already discounted the links and a disavow adds nothing.
Strengthen the editorial side. Earning new editorial links from credible Australian sources dilutes the influence of bad links faster than disavowing them. Five new editorial links in a quarter usually outperform a disavow file. See link-building tactics for the working list and digital PR for the highest-trust source.
Fix the on-site issues that often co-exist. Sites that look like they have a "toxic link" problem often also have weak on-page signals, thin content, slow page speed, or technical SEO issues. Fixing those is usually a faster route to ranking recovery than disavowing links. See the technical SEO pillar and on-page SEO pillar for the audit.
Common mistakes
- Treating the disavow as an event-driven tool, not a quarterly habit.
- Auditing the full profile before deciding anything.
- Cross-referencing Search Console with a second tool before disavowing.
- Preferring domain-level disavows over individual URL lines for clear patterns.
- Attempting removal at source before disavowing.
- Monitoring rankings for 90 days after a disavow before judging the impact.
- Disavowing on the basis of a third-party "toxicity score".
- Rushing a disavow inside the first 30 days of a ranking drop.
- Disavowing every low-quality link as a precaution.
- Including legitimate editorial links by accident.
- Treating disavow as the first response to a core update.
- Forgetting that disavow takes weeks to months to act, then giving up early.
Tools and checklists
- Google Search Console. The disavow tool itself lives here. Also the source of truth for the links Google has indexed.
- Ahrefs Free or Semrush Free. For the second-opinion link audit before deciding what to disavow.
- A baseline ranking snapshot. Before disavowing, capture current rankings for the top 30 keywords. Compare 60 and 90 days later.
- A removal log. Spreadsheet tracking every removal request sent, every response received, every URL eventually disavowed.
- The disavow file itself. Stored in version control. Every update is dated and commented.
For a quick read on whether your link profile actually has issues that warrant a disavow, our free SEO audit tool shows referring domains and anchor distribution alongside the usual technical and on-page checks. For the broader audit service, see website audits.
Perth and WA context
Two patterns we see repeatedly in Perth client disavow audits:
Legacy black-hat profiles from 2010-2015 agency work. Several Perth businesses we inherited had link profiles loaded with low-quality directory submissions, foreign-language link networks, and PBN placements from a previous agency. In most of these cases SpamBrain had already absorbed the signal by 2022-2023 and the site was ranking on its on-page and editorial signals despite the legacy garbage. A surgical disavow of the worst clusters was occasionally appropriate, but the heavy-handed clean-up some Perth agencies still sell almost always removes value.
Negative-SEO scares that turn out not to be negative SEO. Every six months we get a Perth client call about a sudden burst of low-quality links and a ranking drop. Almost every time the cause is unrelated (a Google core update, a thin-content cull, a technical regression) and the link burst is incidental. The disavow is rarely the right response. The SERP performance chapter walks through the diagnostic process.
For service-area trades, mining services or healthcare businesses with inherited profiles, see the relevant industry SEO playbooks: trades SEO, mining SEO, healthcare SEO. For local-search specific link audits, the SEO services page covers the engagement shape.
Related guides
- Backlinks explained. The 101 of what counts as a backlink before deciding what to disavow.
- Link-building tactics. Earning new editorial links is usually a better recovery move than disavowing old ones.
- Anchor text profile. Many "toxic" patterns are anchor-text patterns. Read this before deciding.
- Link attributes. Understanding nofollow, sponsored and ugc before disavowing anything.
- Digital PR for SEO. The fastest way to dilute the impact of legacy bad links is to earn new good ones.
- SERP performance. Diagnose a ranking drop before assuming links are the cause.
- Technical SEO pillar. Often the real issue behind a "toxic link" panic.
- On-Page SEO pillar. Strong on-page signals dilute weak off-page noise.