When should you redirect a domain completely?

[co.mc]

We moved a website over to a new domain name. We used 301 redirects to redirect all the pages individually (around 150 redirects).

So my question is, when should we just kill the old site completely and just redirect (forward/point) the old domain over to the new one?

[MichaelC-15022]

I've been seeing a fairly long time for Google to catch up with 301s and pass along the link juice....a couple of months.  Consensus is that something around 90-95% of the link juice passes through a 301.  There's some talk about 301s not passing link juice forever, although I haven't heard any evidence of exactly how long that might be, but seems like it would be in the 1-2 year range at least.  Just my opinion & recollection of a whole bunch of other people's opinions though :-).

[Harbor_Compliance]

Follow up question - if redirecting a domain completely, how much would doing so affect the rankings?  I'm assuming it will take some time for the new domain to catch up to where the old domain was, but how long might that be?  And would the links for the old domain still count?

[co.mc]

Thank you guys, these were very helpful!

[MoosaHemani]

If I would be at your place, I would have checked the links that are pointing to the old URL and see if the links quality is good and will help the new domain, I would have done the page level 301 redirection. If for some reason the links are not helpful for the new website, I would have done the page level redirection until the old pages get removed from the Google index and new pages get crawled.

Once this happened, I would have reduced the redirections to only one that is domain level redirection and this is to let the audience move to the new website.

P.S: Using Change of Address Idea by Mike King sounds powerful to me!

[MichaelC-15022]

If there are good links out there pointing to the old site, then killing the old site (and its 301s) will throw away that link juice.

If hosting costs are an issue, simply make DNS changes to point the old site at your new servers, then create a little shell of a site on the new servers for the old domain, and 301 redirect just as you are doing today.

There's some thought that 301'ed links don't carry juice forever, but I don't know that I've ever seen that proven out.  Regardless, as long as there are real users occasionally landing on those other sites with the old links, you'd want them to end up on the right pages on your new site if they click those old links...and without that 301, they're SOL.

[iPullRank]

You should fill out a Change of Address in Webmaster Tools as well and then confirm that all of the old URLs are out of the index. The redirects however should remain in place as long as you have links pointing from the old site.