Expired Domains for Link Building: How It Works and the Risks

Expired domains are domain names whose previous owners let the registration lapse. In link building, they are bought because other websites still link to them, and the buyer hopes to reuse that link equity: by redirecting the domain, rebuilding a site on it, or adding it to a private blog network.

Since March 2024, Google's spam policies have included a specific policy on expired domain abuse. Buying an old domain is not against the rules in itself, but buying one to borrow its past reputation for low-value content is.

This page explains how the tactic works, what Google actually says, and where the line sits between a legitimate domain purchase and an abusive one. It does not explain how to build a network.

What is an expired domain?

Every domain is registered for a fixed period. If the owner doesn't renew it, the domain eventually returns to the open market, either through a backorder or auction or by dropping and becoming available to register again.

What makes some of these domains attractive is their history. A business that closed, a project that ended or a charity that merged may leave behind a domain with years of backlinks from news sites, universities and blogs. Those links keep pointing at the domain long after the original site disappears.

Why do SEOs buy expired domains?

The idea is simple: rather than earning links to a new site, buy a domain that already has them. There are four common ways people try to use that history.

Use	What happens	Risk level
Buy a related business or brand and merge it	The old site's content and customers move to yours, with redirects	Low, when the merger is real
Build a new, original site on an old name	A genuinely useful site on a domain that happens to have history	Low to medium, depends on the content
301 redirect a bought domain for its links	The old domain is pointed at a money site to pass link equity	High
Rebuild it as a site to host links (PBN)	Thin content is put up so the domain can link out	Very high

The first two are ordinary business decisions. The last two exist mainly to manipulate rankings, which is what Google's policies are written to catch.

What Google's expired domain abuse policy says

Google announced the expired domain abuse policy on 5 March 2024, alongside two other new spam policies (scaled content abuse and site reputation abuse) and the March 2024 core update. Its spam policies define it like this:

Expired domain abuse is where an expired domain name is purchased and repurposed primarily to manipulate search rankings by hosting content that provides little to no value to users.

The policy gives three illustrative examples: affiliate content on a site previously used by a government agency, commercial medical products sold on a site previously used by a non-profit medical charity, and casino-related content on a former elementary school site.

Google's announcement on the Search Central blog added more context. It said expired domain abuse "isn't something people accidentally do", describing it as a practice used by people "who hope to rank well in Search with low-value content by using the past reputation of a domain name". It also drew the line clearly in the other direction: "It's fine to use an old domain name for a new, original site that's designed to serve people first."

The key words are "primarily to manipulate search rankings" and "little to no value to users". Buying an old domain is not the problem. Using its history as a shortcut for content that wouldn't rank on its own merits is.

Can you 301 redirect an expired domain for SEO?

Technically, yes. A 301 redirect sends visitors and search engines from the old domain to a new destination, and Google's documentation says permanent redirects are the right way to move content.

The problem is the purpose. Redirecting a domain you bought only for its backlinks, to a site that has no connection to what those links were originally about, is an attempt to move link equity that was earned by someone else. Google's expired domain abuse policy is framed around hosting low-value content on the old domain, so a redirect isn't named in it directly. But the link spam policy defines link spam as "creating links to or from a site primarily for the purpose of manipulating search rankings", and it's a reasonable reading that buying domains to redirect their links falls within that intent.

In practice, the risk comes in two forms. Google may simply not credit the redirected links, so the money is wasted. In blatant cases the target site can face a manual action, which is covered in link schemes.

Rebuilding an expired domain

Rebuilding means putting a site back on the old domain. Done properly, this can be legitimate: Google says outright that using an old name for "a new, original site that's designed to serve people first" is fine.

Where it turns into abuse is when the rebuild is a shell. Republishing scraped copies of the old site from the Wayback Machine, adding thin or mass-produced articles, or switching the topic entirely to something commercial (the policy's own examples include casino content on a former school site) all match what the policy describes.

A sensible test is whether the new site would be worth building on a brand new domain. If the answer is no, and the plan relies on the old links to make it rank, it sits on the wrong side of the line.

Expired domains and PBNs

Most private blog networks are built on expired domains. The network owner buys domains with existing links, puts up content, and uses each site to link to a money site or to sell links to others. The PBN backlinks guide covers what they are, how footprints give them away, and why this site recommends avoiding them.

Since March 2024, PBN sites built this way can fall under two policies at once: expired domain abuse for the sites themselves, and link spam for the links they place. Google's December 2022 link spam update also said SpamBrain targets "sites used for the purpose of passing outgoing links", which describes a network site's whole reason to exist.

The white hat vs black hat link building guide places both tactics at the high-risk end of the spectrum.

Legitimate uses: buying a business or brand

Companies buy other companies, merge brands and consolidate sites all the time. When the purchase is real, combining the domains is normal and Google documents how to do it.

Google's guidance on site moves with URL changes lists "merging multiple domains or hostnames" as a standard type of move. It recommends permanent redirects from old URLs to their closest new equivalents, keeping the redirects "for as long as possible, generally at least 1 year", and submitting a Change of Address in Search Console when moving from one domain to another.

Legitimate merger	Abusive repurposing
You bought the business, brand, product or content	You bought only the domain name for its links
Old pages redirect to matching pages on your site	Everything redirects to your homepage or a money page
The topic and audience stay the same	The topic changes to whatever earns money
Customers and readers are told about the change	The old audience isn't considered at all
Content is kept, improved or properly consolidated	Content is thin, scraped or mass-produced

The short version

• Expired domains are bought for the backlinks still pointing at them, then redirected, rebuilt or used in a PBN
• Google's expired domain abuse policy, announced in March 2024, covers domains "purchased and repurposed primarily to manipulate search rankings by hosting content that provides little to no value to users"
• Google says it's "fine to use an old domain name for a new, original site that's designed to serve people first"
• Redirecting bought domains for links and building PBNs on them are high-risk tactics that conflict with Google's link spam and expired domain abuse policies
• Buying a related business and merging it with proper redirects is a normal, documented site move
• For lower-risk ways to build links, see the link building strategies hub