Are soft 404 errors really a concern for your SEO?

What exactly is a soft 404 error?

A soft 404 occurs when your server returns an HTTP status code of 200 (OK) for a page that, in reality, displays error or non-existence content. Typically: a page with "Sorry, this product no longer exists" or "No results found" that still returns a 200.

Google detects this inconsistency by analyzing the page content. The bot sees a 200 code saying "everything is fine", but the content screams "this page should not exist". This technical contradiction creates ambiguity for the algorithm, which has to guess whether the page deserves to be indexed or not.

Why does Google emphasize this distinction?

Because HTTP codes are the primary structural signal that Googlebot receives. A 404 code is a clear instruction: "This URL does not exist, don't waste time here, don't index anything." A 200 code, even with empty or error content, still technically signals a green light for crawling.

The consequence? Empty or valueless pages can be crawled repeatedly, wasting crawl budget on unnecessary resources. Worse yet: Google may index these "phantom" pages, diluting the perceived quality of the site and creating content duplication issues if multiple URLs display the same generic error message.

How does Google detect a soft 404?

The algorithm analyzes typical content patterns of error pages: low text volume, lack of significant internal links, presence of terms like "not found", "does not exist", "no results". It also compares the structure of the page to that of other pages on the site to detect anomalies.

In Search Console, these errors appear under the Coverage tab with the status "Excluded". Google informs you that it has identified an inconsistency between the HTTP code and the actual content. This is not a direct penalty, but a warning that you are sending contradictory signals.

• Code 200 + empty or error content = soft 404 detected by Google
• Impact on crawl budget: wasted resources on worthless pages
• Risk of unintended indexing: empty pages polluting the index
• Degraded quality signal: algorithmic confusion about the site's structure
• Detected via Search Console: Coverage tab, status "Excluded"

Is this statement consistent with field observations?

Absolutely. Soft 404s are a common find in technical audits that I consistently encounter on e-commerce sites and dynamic content platforms. Practice shows that Google is indeed capable of detecting them with increasing accuracy, especially since the improvements in semantic understanding of content.

What is less clear in this statement? Google does not specify the tolerance threshold or the quantitative impact on ranking. A few isolated soft 404s won't kill your site, but a high proportion (let's say >5% of your indexed URLs) becomes problematic. [To be verified]: Google has never communicated an official figure on this.

What nuances should be added to this recommendation?

Let's be honest: not all cases can be resolved by a simple 404. Some “empty” pages are temporary and legitimate: an e-commerce category without products in stock at the moment, but which will have them tomorrow. Serving a 404 here would be technically incorrect since the page does exist.

In these situations, the clean solution is a 503 code (Service Unavailable) with a Retry-After, or better yet: maintain minimal content with alternative suggestions and a legitimate 200 code. The problem with soft 404s is the total lack of useful content combined with a misleading success code.

Another nuance: empty internal search results pages. If your facet returns "0 products found", should you serve a 404? Technically yes, if that URL is crawlable and indexable. But the real question is: why can Google crawl these pages? Revise your architecture and your robots.txt instead of multiplying 404s.

In which cases does this rule not apply strictly?

Single Page JavaScript applications (SPAs) pose a particular challenge. On the server side, everything returns a 200 because it is the application shell that loads. It is the client-side JavaScript that then generates the content or the error. Google may interpret this as a soft 404 even if your app correctly handles the 404 state on the client side.

The solution here lies in server-side rendering (SSR) or a hybrid architecture that allows the server to return the correct HTTP code even before executing the JS. Not always easy to implement, but essential for sites that heavily rely on SEO.

What should be done to fix soft 404s?

First step: identify existing soft 404s in Search Console, Coverage section. Google lists the affected URLs. Download this list and analyze it: are they real errors (deleted products, obsolete pages) or false positives (legitimate content misinterpreted)?

For genuinely missing pages, configure your server or CMS to return an authentic HTTP 404 code. On WordPress, check that your theme does not display a generic template with a 200 for 404s. On custom platforms, audit the routing logic and error handling.

If the page has been moved, use a 301 redirect to the new URL or a relevant alternative. Don't multiply 404s if a better destination exists: it's bad for UX and you lose the accumulated SEO value.

What mistakes should be avoided in managing non-existent pages?

Error #1: systematically redirecting all 404s to the homepage. This is what is called a disguised soft 404. Google sees a 301 to the root, crawls the homepage, and detects that the content has nothing to do with the original URL. Result: still a soft 404, with the added bonus of wasted crawl budget.

Error #2: creating overly complex 404 pages with forms, heavy dynamic content, and multiple scripts. A 404 page should be light and explicit. Its role is to inform the user and the bot, not to catch them at all costs.

Error #3: ignoring soft 404s by saying to oneself "it's just a few pages". On a site with 10,000 URLs, 500 soft 404s represent 5% of pollution. That's enough for Google to reevaluate the overall technical quality of your domain downward.

How can I check if my site handles HTTP codes correctly?

Use a technical crawler like Screaming Frog, Oncrawl, or Botify to scan your entire site. Filter pages returning a 200 code but with suspicious content (low text/HTML ratio, absence of internal links, error patterns in title or H1).

On the server side, audit your logs to identify URLs that generate many Googlebot requests with a 200 code but a very short crawl time (a sign that the bot identifies a page as empty or uninteresting). Cross-reference this data with Search Console to confirm soft 404s.

Finally, manually test a few typical URLs by simulating a Googlebot request via curl or a tool like Fetch as Google (in Search Console). Check that the HTTP code returned accurately matches the reality of the content.

• Download the list of soft 404s from Search Console (Coverage > Excluded)
• Audit each URL: real error or false positive?
• Configure the server/CMS to return an authentic 404 code on non-existent pages
• Implement 301 redirects to relevant alternatives when they exist
• Avoid systematic redirects to the homepage (disguised soft 404)
• Crawl the site with a technical tool to detect inconsistencies between HTTP code and content
• Check server logs and cross-reference with Search Console data