What Moz Spam Score actually means, what counts as a safe score, why it matters for your Domain Authority, and a step-by-step way to bring a high score down safely.
Moz Spam Score is a 1–100% metric that estimates how closely your site resembles websites Google has penalised — based on a machine-learning model of 27 spam signals. Under 30% is low risk (safe), 31–60% is medium, and 61%+ is high risk. It's not a Google ranking factor, but it flags the same link-quality problems Google's own systems target. Almost every site triggers at least one flag, so don't panic over a small number. To lower it: audit your backlinks, disavow genuinely toxic links in Google Search Console, fix thin or spammy on-site issues, then wait for Moz's next crawl to update.
Spam Score is a metric created by Moz that estimates the likelihood a website could be penalised or banned by search engines. It's expressed as a percentage from 1% to 100% — the lower, the better.
Moz built it using a machine-learning model trained on millions of sites Google had already penalised or banned. The model identified 27 common features (the original 2015 version used 17 "flags," which is why older guides mention that number) that penalised sites tend to share. Your score reflects how many of those features your site exhibits — in other words, how much you "look like" a site that gets penalised, not a direct measure of whether you are spam.
Crucially, Spam Score is not a Google ranking factor. Google doesn't read your Moz Spam Score. But because it's modelled on real penalised sites, it reliably flags the same link-quality and site-quality problems that Google's own spam systems (like SpamBrain) target — which makes it a genuinely useful early-warning tool.
Don't panic over a low number. According to Moz's own research, almost every site triggers at least one spam flag. The score only becomes a real concern when many signals stack up — risk rises sharply as flags accumulate.
Moz groups scores into three risk bands. Here's what each means and what to do about it.
| Spam Score | Risk level | What it means & what to do |
|---|---|---|
| 1–30% | Low risk | Healthy and safe — where most established sites sit. No action needed; just monitor. |
| 31–60% | Medium risk | Worth investigating. Audit your backlinks and on-site quality, and clean up anything clearly toxic. |
| 61–100% | High risk | Demands action. A profile this risky can undermine your DA and signal trouble to search engines — clean it up promptly. |
Aim to keep your score under 30%. If you're buying any kind of links, this is the number to watch — cheap, low-quality links are the fastest way to push it up.
Spam Score and Domain Authority are separate metrics, but they're linked. Toxic, spammy backlinks raise your Spam Score and, at the same time, drag your DA down — because the same low-quality links that look risky to Moz also fail to pass real authority.
This is exactly why chasing cheap bulk links backfires. You might add hundreds of links hoping to lift your DA, only to spike your Spam Score and end up worse off — lower authority and higher penalty risk. Sustainable DA growth comes from clean, high-quality links that keep your Spam Score low. That's the core principle behind any safe link-building campaign.
The rule of thumb: a healthy site has high DA and low Spam Score. If a "DA boosting" service spikes your Spam Score, it's hurting you — not helping. Quality over quantity, always.
Moz doesn't reveal which specific flags your site triggered, so you self-audit against the known signal types. These are the most common culprits.
Toxic backlinks from gambling, adult, crypto, pharma or other low-trust sites.
Links from sites with their own high spam scores — bad neighbourhoods rub off.
Over-optimised, exact-match anchor text repeated unnaturally across links.
Thin or low-quality content and doorway-style pages.
Unnatural link patterns — sudden spikes or huge link-to-content ratios.
Few or no links from trusted, relevant domains to balance the profile.
Work through these in order. The goal is a cleaner, more natural-looking link profile.
Run your domain through Moz Link Explorer or Domain Analysis (the free tool gives a few checks). Note your Spam Score and which linking domains look worst.
Export your backlinks from Moz and Google Search Console. Flag links from irrelevant, low-quality or obviously spammy sites — gambling, adult, pharma, link farms and sites with high spam scores of their own.
Where practical, ask webmasters to remove the worst links, or delete any you created yourself (old directory or forum spam). Manual removal is cleaner than disavowing.
For links you can't remove, submit a disavow file in Google Search Console. Be conservative — only disavow links that are clearly harmful, since over-disavowing can cost you good equity.
Improve or remove thin pages, cut keyword stuffing and intrusive pop-ups, and tidy unnatural internal linking. Spam Score reflects on-site signals too, not just backlinks.
Earn quality links from trusted, relevant domains. A healthy stream of good links dilutes the influence of past bad ones and lowers your overall risk profile.
Moz updates Spam Score on its own crawl cycle (roughly quarterly), and it can't see your Google disavow file. So the number won't drop instantly — make the fixes, then give it time to reflect.
A high score doesn't always mean spam. It estimates risk based on similar sites, so investigate the underlying links before mass-disavowing. Don't nuke healthy links in a panic — that does more harm than a moderate Spam Score ever would.
BoostMyDA builds only clean, white-hat links from real, relevant domains — lifting your Domain Authority to 40+ in 14–21 days while keeping your spam score low. Or your money back.
Boost My DA — ₹1,999Under 30% is low risk and considered safe — where most healthy sites sit. 31–60% is medium risk and worth investigating; 61% and above is high risk and needs prompt cleanup.
No. Spam Score is a Moz metric, not used by Google. But it's modelled on real penalised sites, so it flags the same link-quality issues Google's own spam systems target — making it a useful warning sign.
It's a machine-learning model trained on millions of penalised or banned sites. Moz identified 27 common features (originally 17 flags) those sites share and scores how many your site exhibits, as a percentage from 1–100%.
Use Moz's Link Explorer or Domain Analysis tool — enter your domain and open the Spam Score tab. Free access is limited to a few checks; Moz Pro gives unlimited reports and per-link filtering.
Not immediately. Moz updates Spam Score on its own crawl cycle (roughly quarterly) and can't see your Google disavow file, so make your fixes and allow time for the next update to reflect them.
Indirectly, yes. The toxic links that raise your Spam Score are the same low-quality links that fail to pass authority and can drag your DA down. Keeping Spam Score low protects your DA.
No — be selective. A high score estimates risk based on similar sites; some flagged links are harmless. Investigate first and only disavow links that are genuinely toxic, since over-disavowing can remove valuable equity.
Sources & further reading: Moz — Spam Score · Moz Link Explorer · Google Search Console (Disavow). External links open in a new tab and are marked nofollow.