In 2021, Google’s Gary Illyes mentioned on Twitter that redirect alerts consolidate completely to the brand new location after one yr.
Which means, in principle, alerts to the unique URL are completely handed to the brand new one after a yr.
If the redirect is eliminated and the unique web page is restored, the unique web page has to construct brand-new alerts on its personal.
Regardless that the previous hyperlinks nonetheless level to the unique web page, they rely for the web page that was the redirect goal for over a yr.

Sidenote.
Be aware that one yr is measured from the time Google crawls it.
That is completely different from what SEOs consider. Often, it’s assumed that if the redirect is now not in place that the alerts are misplaced. It’s additionally been understood that if the unique web page is restored that the alerts will construct again up for that web page. Have we been improper this entire time? Let’s discover out.
I eliminated redirects to those pages on January 30, 2023:
These posts had been chosen as a result of they’d older posts redirected to them. These older posts had been about the identical subjects and had sufficient hyperlinks and referring domains that I assumed eradicating them would have a visual influence.
You may see the clear drop in referring domains after I did this:

What I don’t see is far drop in site visitors to those posts. One really has elevated site visitors, one is down, and two are comparatively flat.

The publish on key phrase search quantity is the one which was down. The drop that appears prefer it occurred about the identical time as when the redirects had been eliminated really occurred just a few days earlier than the removing. You may see that the drop already occurred on January 24, however I didn’t take away redirects till January 30.

The site visitors to the publish did decline throughout the take a look at, so I can’t rule out that eradicating the redirects harm this publish.
I’m not keen to conclusively say that everlasting redirects go worth even after one yr, however what Gary mentioned appears to largely maintain true.
It’s not that I don’t consider Gary, however that is radically completely different from how SEOs thought redirects consolidated. It appears loopy that alerts might be consolidated to a special location than the place a hyperlink factors.
It’s actually not one thing I wish to take calmly. I’m already operating one other take a look at, have a bigger take a look at deliberate if that pans out, and can possible do a research after that. Regardless that it’s not conclusive, it possible will maintain true, and that’s why I wish to share this now.
If the way in which we perceive redirect consolidation is improper, it has large implications for the search engine optimisation business.
Redirect suggestions
One of many techniques that I at all times use with a brand new shopper is to redirect 404 pages which have hyperlinks pointing to them. I believe, in most of these circumstances, the pages had by no means been redirected.
If redirects are literally everlasting after one yr, I’ll have to section people who had been redirected longer than a yr from people who weren’t. There would possibly nonetheless be worth available with this tactic, however with much less work wanted.
Area shopping for
This can be a massive one. The worth of a site can change lots primarily based on the hyperlinks pointing to it.
A variety of SEOs purchase domains that have already got hyperlinks from websites in the identical area of interest once they plan to launch a brand new web site or redirect it to their present web site. They hope that these previous hyperlinks will assist them rank higher.
Think about if that worth was now not really there. If the area had been redirected for a yr or extra and the worth completely handed to a special area, then that area is perhaps value lots much less.
Instruments
There’s additionally an enormous influence on varied instruments like Ahrefs if the redirects do completely go worth. We would wish to alter how we present hyperlinks and domains to those websites when redirects are concerned.
I’m positive we’d additionally get lots of questions when the redirects had been eliminated, e.g., “Why do you continue to present these hyperlinks to this web page when the opposite web page now not redirects?” It’s a bizarre idea, proper? But when that’s the way it works, that’s what we have to do.
Last ideas
I haven’t seen any change within the search engine optimisation business or the suggestions from SEOs since Gary’s tweet. I’m undecided if that’s as a result of few folks noticed it or adopted the fractured dialog, or we collectively don’t wish to consider that redirects consolidate in another way than what we suppose.
I nonetheless don’t suppose many SEOs consider me once I say momentary redirects consolidate backward to the unique URL, however they do.
As I mentioned, I’m not keen to name this one simply but. On the very least, much more checks must be run earlier than I’m keen to conclude that everlasting redirects do completely go alerts.
When you have any questions, message me on Twitter.