Domain Rating vs Domain Authority. Useful tools, lousy targets.

What DR and DA actually are

Domain Rating (DR) and Domain Authority (DA) are proprietary scores produced by two SEO tool vendors. Both run on a 0 to 100 scale. Both are calculated from the quantity and quality of inbound links in the vendor's own crawl index. Both are logarithmic, meaning a jump from 30 to 40 represents a much bigger change in link strength than a jump from 60 to 70.

Domain Rating (Ahrefs)

Released in 2016 as part of Ahrefs's tool suite. The Ahrefs methodology builds on the original PageRank logic: a site's DR is calculated from the number of unique referring domains and the DR of those referring domains, in a recursive flow. Ahrefs updates DR continuously as their crawler discovers new links. Ahrefs publishes the methodology in some detail and updates the formula every couple of years.

Domain Authority (Moz)

Released in 2010. Moz's methodology incorporates link quantity, link quality, plus a machine-learning model trained against actual Google rankings. Moz has updated DA twice (DA 2.0 in 2019), partly to better reflect Google's own evolving algorithm. The score updates roughly weekly.

Both scores rely on the vendor's own link index, which is the critical caveat. Ahrefs and Moz crawl the web independently of Google and discover different subsets of links. Their indexes are large but not complete, and they disagree about which sites are authoritative.

Why DR and DA disagree

A site might be DR 45 in Ahrefs and DA 32 in Moz. Or DR 60 and DA 70. The numbers regularly diverge. Three reasons:

Different link indexes. Ahrefs and Moz crawl the web with different priorities, crawl budgets and frequency. They find different subsets of the actual link graph. A site with many academic links might show high in Ahrefs and low in Moz, or the reverse, depending on which crawler hit which pages.

Different weighting algorithms. Ahrefs leans toward referring-domain count and the referring domains' own DR. Moz's machine-learning model weights more variables, including some on-page signals. The end results disagree because the models disagree.

Different update cycles. Ahrefs DR can move daily; Moz DA moves weekly. A site that just earned a wave of links may show new DR in Ahrefs before Moz catches up.

Neither score is "right". They are two different vendors' best models of link-profile strength. Their loose correlation with each other (and with actual ranking) is what makes them useful, but the absence of perfect alignment is what makes them unreliable as targets.

Google's stated position

Google's public position on third-party authority scores has been consistent for over a decade. Some examples:

• John Mueller (Google Search Advocate) has stated multiple times across Twitter, video Q&A and Search Central episodes that Google does not use Domain Authority, Domain Rating or any equivalent third-party metric as a ranking factor.
• The Search Liaison team has reinforced the same message: third-party scores are vendor models, not Google signals.
• Google does use an internal site-level authority signal as part of broader ranking, but it is not visible externally and does not map directly to DR or DA.

The reason the scores correlate with ranking at all is straightforward: sites that rank well tend to have many quality links, which means they also have high DR and DA. Causality runs from "strong site" to "high DR", not the other way. Working to raise DR through link acquisition that does not also strengthen the site causes the score to drift up while rankings stay flat. Working to strengthen the site through editorial coverage and relevant content causes DR to rise as a side effect, alongside ranking improvements that actually matter.

Where the scores are genuinely useful

The scores have legitimate uses. Three we still use across client work:

1. Comparing two competitors quickly

When you need a 30-second sense of whether competitor A or competitor B has a stronger link profile, DR or DA gives you a single number to compare. It is a heuristic, not a ranking forecast, but it is faster than running a full link audit on both.

2. Spotting suspicious link sources

A site that emails you offering a "DA 60 link for $200" is almost always a low-quality vendor. The DR or DA of the offering site is rarely what they claim, and even when it is, the site itself is usually a low-trust source that SpamBrain will ignore. Using DR/DA as part of the filter on outreach requests catches most of the obvious scams.

3. Tracking the rough trajectory of your own profile

If your own DR moves from 18 to 35 over 18 months of digital PR and editorial outreach, that is meaningful evidence the link profile is genuinely strengthening. It is not the only evidence, but it is one of the cheapest data points to monitor. Just do not confuse the score with the goal.

Where the scores lead people astray

Four common ways DR/DA become traps:

1. Treating DR as a KPI on an SEO retainer

Some agencies report DR as the primary ranking signal in monthly reporting. The number can be moved by acquiring low-quality links that lift the score without doing anything for actual rankings. Owners see the number rise and assume the retainer is working. Rankings, traffic and revenue do not move. Track outcomes, not vendor models.

2. Refusing links from low-DR sources

A small industry blog with DR 12 may be a perfect editorial fit, with a genuine audience of the exact prospects you want. Refusing the link because the DR is "too low" misses the value the link actually carries. Relevance and editorial intent beat DR every time.

3. Buying links to chase DR

The most expensive trap. Paid-link campaigns can sometimes lift DR in the short term while triggering SpamBrain neutralisation that stalls actual rankings. The owner has paid for a number to move without moving the business outcome.

4. Setting DR targets in agency contracts

If the contract says "increase DR by 10 points in 12 months", the agency has every incentive to acquire whatever links move the score, including ones that do nothing for actual rankings. The KPI shapes the work. Contract on outcome KPIs (organic rankings, organic traffic, organic conversions) not on third-party vendor scores.

What to track instead

Five metrics that actually tell you whether the off-page program is working:

1. Organic keyword rankings. Track your top 30 commercial keywords with a rank tracking tool. Movement here is the real story. See rank tracking the right way for the methodology.
2. Organic traffic and conversions. Google Analytics or your equivalent. Watch organic sessions to commercial pages and the conversion events those sessions produce.
3. Referring-domain count from priority sources. Filter your link profile to "Australian editorial publications" or "industry-relevant sites" and count quarterly. This measures whether you are earning the right kind of link, not just any link.
4. Brand mention frequency. How many credible publications mentioned your brand this quarter, linked or unlinked? See brand mentions as a ranking signal for the monitoring setup.
5. Anchor distribution. Quarterly snapshot of the inbound anchor mix by category. See anchor text profile for the categories.

Those five together describe the actual state of your off-page program in a way no single third-party score can. A site with rising DR but flat rankings has an off-page program that is not working. A site with flat DR but rising rankings, growing relevant referring domains and improving anchor distribution has an off-page program that is. Trust the underlying data over the vendor summary.

Common mistakes

Tools and checklists

1. Ahrefs Free. Limited daily DR lookups, free.
2. Moz Free Link Explorer. Limited daily DA lookups, free.
3. Google Search Console. Free. The source of truth for the links Google has actually indexed.
4. A rank tracking tool. AccuRanker, SerpRobot, SERanking. Or use Search Console's Performance report for free.
5. A monthly metric dashboard. Rankings, traffic, conversions, referring domains, brand mentions, anchor distribution. Pulled together once a month.

For a quick read on your own site's profile through the lens of metrics that actually move rankings (rather than the vendor scores), our free SEO audit tool covers the link, anchor and on-page side together. The broader engagement runs through SEO services.

Perth and WA context

Three Perth-specific patterns we see in client engagements:

Australian site DR ceilings are lower than US equivalents. The Australian link economy is smaller, so even strong Australian sites cap out at lower DR than their US counterparts in the same category. A Perth services firm ranking at the top of its commercial SERPs might have DR 35 while the equivalent US firm has DR 65. The lower number is not a problem; it reflects the market size, not the site's competitive position. See Local SEO Perth for the broader local context.

Local Australian editorial links often show low DR but high ranking impact. A link from The Mandurah Mail, the Sound Telegraph, or a Pilbara trade publication might show DR 25 in Ahrefs, but it can move rankings more than a DR 60 link from an off-topic US site. The local relevance, the editorial intent and the topical context all carry weight that DR cannot see. See the regional pages at SEO Mandurah, SEO Rockingham and SEO Karratha for the regional pattern.

Industry association sites have DR profiles that do not reflect their topical authority. Master Builders WA, the Law Society of WA, AMA WA, and the various specialty associations are highly authoritative for their categories but show modest DR because they are not heavily linked from outside their niche. A link from one is worth far more to a member firm than the DR score suggests. See the industry SEO playbooks for trades, legal, healthcare and mining for category-specific guidance.

Related guides

• Backlinks explained. The fundamentals DR is trying (and failing) to summarise.
• Link-building tactics. The tactics that actually move rankings, regardless of what DR says.
• Anchor text profile. A dimension of link quality DR cannot see.
• Brand mentions. Entity signals DR is structurally blind to.
• Disavow toxic links. Why "toxic" scores from third-party tools are a poor disavow trigger.
• SEO KPIs that actually matter. The metrics worth reporting on a retainer.
• Rank tracking the right way. What to track instead of DR.
• Digital PR for SEO. The tactic that genuinely raises DR over time as a side effect.