What percentage of PageRank is lost through a 301 redirect?

What people said

Cites GDVS · 2013-03 · Webmasters Stack Exchange · on “Just overhauled our entire site. How do I keep Google, Bing and Yahoo from demoting us?”

Assuming you've done nothing to reduce the quality of your site, you should not see long-term ranking loss. You will however see movement, both up and down, for a few weeks. You say you've "created a number of redirect rules". Unless it's a very large, complex site, this should be the case for all pages , and they should return 301 HTTP code. If you've migrated or retired content before, check for chained redirects: these should be avoided as they will increase page load time, cause unnecessary additional dissipation of PageRank [this video] (or equivalents), and may even not be followed at all [LINK] in some cases. robots.txt (check specs here [LINK] ) should be present with a reference to a val

Cites John Mueller · 2013-06 · Webmasters Stack Exchange · on “PageRank & SEO results of using a different domain for each company product”

PageRank [LINK] is purely URL/page-based, so whether you have [LINK] , [LINK] or [LINK] would not change anything in how PageRank is calculated. Using a 301-redirect to forward users (and search-engine signals like PageRank) to a different URL is generally fine, but PageRank is slightly dissipated [this video] during a redirect like that. That's not something I'd worry about though - many sites use shorter URLs or domain names for marketing purposes, but keep the actual content on their main site, and the real value comes from people just going there to actually engage with the product (or even buy it).

Cites Max · 2013-06 · Webmasters Stack Exchange · on “ASP to HTML - 301 redirects (SEO rankings before and after)”

Yes, if you are changing the format of your URLs from one extension to another, the correct thing to do is set a redirect from the old URLs to the new ones. However, even if done correctly there can still be disruption to your current Google rankings, as the change is going to take time for Google to process & update and the fact that 301 redirects carry over most (but not 100%) of the ranking weight from the old URLs. Here's a video from Matt Cutts [this video] here on the subject of page rank loss through 301 redirects. If you don't want any fluctuations, stick with he URLs you have, if that is not an option then make sure to: Use correct 301 redirects Redirect URL-to-URL, for every page you wa

Cites Stephen Ostermiller · 2013-07 · Webmasters Stack Exchange · on “Is my PageRank/linkjuice affected after 301 redirect and losing social likes?”

Google pushes most if not all of the Pagerank to the new page when you use a "301 Moved Permanently" redirect. Google has been ambiguous on the "all or most" point in the past. Here is the latest video that Matt Cutts posted answering: What percentage of Pagerank is lost through a 301 redirect? [this video] . After that, lots of people were still confused in the forum discussion on WebmasterWorld about that video [LINK] . The loss of likes and tweets shouldn't effect your Pagerank. Pagerank is a measure of inbound links not of social signals.

Cites GDVS · 2013-11 · Webmasters Stack Exchange · on “Does purposely linking to an invalid URL and then using 301 affect SEO?”

Does purposely and permanently having invalid URLs on your site that get 301'ed to the correct ones have any effect on SEO? I could make it just show the correct URL to begin with, but this is a significant amount of work due to how I am handling the translations, so I would prefer just to 301 them. Arguably, yes. According to Google [this video] , a 301 redirect will pass about 85-90% of PageRank, which is about the same as an ordinary link. If every link on your site 301 redirects before reaching its destination, that effect is multiplied, i.e., if we assume 15% reduction, the destination page ends up with about 13% less PageRank than it otherwise would have (85% of 85% = ~72%). It also adds un

Cites dan · 2014-02 · Webmasters Stack Exchange · on “301 redirect from new page to old to keep PageRank?”

@user298723 Not sure how the above answers the OP's question, but in regards to your comment: Matt Cutts addressed that here [this video] recently, stating that 301 redirects don't hurt you and only relatively dissipate PageRank.

Cites RichardB · 2014-07 · Webmasters Stack Exchange · on “Changing main domain, redirect backlinks too?”

301ing will allow you to keep all traffic whilst the search engines re-index, so that is the most important to do. This should be on all pages, not just any that have links. Personally, I think Option 2 would make for a good signal that the links are still relevant (not, for example, someone buying and 301ing a site just for page rank). However, Google claimed recently that this is not the case : [this video] That said, such things are always in flux and I certainly can't see a time when a 301 does better than a normal link and so, if you have the time to do so, I think it is worth changing the off-site links too.

Cites Matt Sells · 2015-02 · Webmasters Stack Exchange · on “Site migration using new and old subdomains and SEO impact”

Sub domains are considered as separate and totally different domains in the eyes of Google. The SEO impact of this is that it will be like you are migrating to a new domain name. Any way you do this, you will lose a little of the authority (PageRank) on the other end. Same with 301 redirects. [this video] So, we know you are going to lose a little, which is fine. You will probably not notice. What you need to be concerned with are general SEO best practices. Treat this like a real site migration. Map out all of your current URLs. Redirect each URL example.com/widget/ to it's new home whatever.example.com/widget/ with a 301 redirect. Do not just redirect all old URLs to the root, or one page. You

Cites user2428118 · 2016-02 · Webmasters Stack Exchange · on “Best practices for adding SSL and preserving backlinks”

If you're going to move to HTTPS, the right kind of redirect to use is a 301 redirect [LINK] , which says you've moved the page permanently to a new spot. About the use of 301 redirects when moving to a new domain, Google says [LINK] the following: If you can do those [301] redirects to do the granularity of page level to page level, that's a great user experience. And the PageRank and those sorts of things should flow relatively well to the new site as well. Google has said [this video] some PageRank is lost on 301 redirects though; I do not know if they make an exception for this case. However, HTTPS will positively affect your site's ranking [LINK] , so switching to HTTPS is unlikely to hurt y

Cites RonC · 2016-06 · Webmasters Stack Exchange · on “Is there negative impact on using a 301 redirected link as main nav?”

Google has a long held position that 301 links are fine and very appropriate for many situations. They pass page rank and most sites rely on them for a host of reasons like: 1) page url was update to new url 2) Company was acquired and all their urls now redirect to cooresponding urls on acquirers website 3) Total site redesign in which all urls changed. Google has stated that the amount of page rank that flows over a 301 is nearly identical to the amount that flows over a straight link. See here [this video] Some webmasters feel that there may be slightly more loss due to a 301 than a straight link, but there are no hard numbers, and it's generally thought to be a very tiny loss, perhaps 1%. So