Should You Link Between Websites You Own?

If you run several websites, you can link between them, but only where the link would exist if search rankings did not. Google's spam policies prohibit excessive link exchanges and partner pages built for the sake of cross-linking, and they name using automated programs to create links as a separate violation. A handful of editorial links between genuinely related sites is ordinary. A system that makes every site link every other site is the thing the policy describes.

The test that settles most cases

One question: would this link exist if search rankings did not exist?

A tutoring marketplace linking to its own sister site for school subjects, in an article where a reader would plausibly want it, passes. A footer block on every page of four sites linking to the other three does not. The second is not a judgement call, it is a named example in the policy.

Why owning the sites makes it riskier, not safer

Common ownership is detectable and already detected. Shared registrant details, shared hosting, shared infrastructure, correlated publishing schedules: these are the footprints network-level analysis is built to find. Google's spam systems evaluate the relational pattern across a set of domains, not individual link pairs, including anchor text distribution and timing.

So the links between your own properties are attributable whether or not you intend them to be. That is not a reason to avoid linking. It is a reason to make sure the links can be defended individually.

The four patterns that create a footprint

Reciprocity. Site A links to B and B links back to A. One direction reads as a citation. Both directions read as an exchange, and a portfolio full of matched pairs produces a signature that is hard to explain any other way.

Uniformity. The same anchor phrase pointing at one page from several domains. Independent authors do not phrase things identically. One repeated anchor across a network is the most legible signal available.

Volume. Two genuinely related sites might reasonably link a few times. Dozens of links between the same pair stops being about readers.

Schedule. Links appearing in matched pairs on a regular cadence is a machine's behaviour, not an editor's.

What to do instead

Keep the links that survive the test and drop the rest.

If two of your sites serve adjacent audiences, a reader moving between them is a real event worth serving. Link where an article genuinely calls for it, vary the anchor to suit the sentence it sits in, and do not link back by default.

A case study is often the honest version of what people want from a cross-link. Writing up what you tried on one property, with real numbers, naturally references it, and that is a page worth reading on its own terms.

The part worth more than the links

For a portfolio of related sites, the bigger problem is usually not missing links. It is that two of your sites are chasing the same search.

If you run a language tutoring site and a school subjects site, both will naturally generate keywords about online tutoring. When both publish against the same intent, they compete for one position and split traffic you already paid to create. Neither ranks as well as one would have.

Checking for that overlap is unglamorous and pays better than any internal link scheme. The fix is also straightforward: decide which site owns a contested intent based on which one the topic genuinely belongs to, and let the other one cover something else.

Common questions

Is reciprocal linking against the rules? Not categorically. The policy prohibits excessive link exchanges, and the operative word is excessive. One mutual link between two genuinely related sites is not a scheme. A systematic arrangement across a set of domains is.

Should I use nofollow between my own sites? If the link is genuinely editorial, no. If you find yourself wanting nofollow to make a link safe, that is a signal the link should not be there.

What about a partner or resources page listing all my sites? Partner pages created for the sake of cross-linking are named in the policy verbatim. An about page that mentions what else you run, as information rather than as a link block, is a different thing.

Does any of this apply to internal links within one site? No. Linking between pages of the same site is site structure, not link building, and there is no equivalent concern.