Private blog networks (PBNs): cost, detection and whether one ever makes sense

A private blog network, or PBN, is a group of websites controlled by one operator and used to link to that operator’s money sites. Most are built on expired domains that still have backlinks from their earlier life. The risk is R4: a clear policy violation with a realistic chance of the whole network being neutralised.

This page explains what a network is, what it costs, how it gets found, and how to decide whether one could ever be worth it. It is an analysis, not a build guide.

The four kinds of network

Type	Who gets links	What tends to happen
Private	The operator’s own sites only	Lasts longest, costs the most per link
Semi-private	A few clients	Footprint grows with each client
Public	Anyone who pays	Burned fastest
Real-site network	Varies	Sites with real content and traffic, hard to tell apart from a small media group

The last type matters. The closer a network gets to a set of real sites with real readers, the less it looks like a network and the more it costs. At that point the operator is running a small publishing company.

Why people build them

Control. The operator picks the page, the anchor and the timing, pays no publisher, and cannot have the link removed by someone else.

Scarcity is the other reason. In markets where most publishers refuse the topic, such as gambling, adult, pharma and loans, the supply of ordinary placements is small and shared between competitors. A network is supply nobody else can buy.

What a network costs

Almost every figure here is an estimate or comes from a single source. There is no measured dataset for PBN costs.

Item	Cost	Basis
Domain, usable	$50 to $500	Practitioner estimate
Domain, strong	$1,000 to $10,000 or more	Practitioner estimate
Full build per site: domain, content, setup	$150 to $600	Practitioner estimate
Upkeep per site: hosting, content, maintenance	$10 to $40 a month	Practitioner estimate
Fully built unit	“Four figures”	ICODA, one industry source

Take the build and upkeep estimates together. Twenty sites cost $3,000 to $12,000 to build. Running them for twelve months adds $2,400 to $9,600. That is before the operator’s own time, and before replacing sites that drop out of the index.

Buying links on someone else’s network is cheaper and worse.

What is sold	Reported price	Confidence
Public PBN links, in bundles	$1 to $5 each	Respona, 2026
Semi-private homepage links	$30 to $150 each, rented or permanent	Low
Rented homepage links in high-risk markets	$10 to $100 per link per month	Low

The domain supply is the same one described under expired domains, and the same history checks apply.

How networks get detected

A network is only useful while its sites look unrelated. Each thing they share is a footprint.

Infrastructure. Shared IP addresses, nameservers, hosting companies, registrars and registration dates.

Software and accounts. The same themes and plugins. The same analytics, advertising or tag manager IDs. The same Search Console account.

Site shape. No about page, no named author, 5 to 30 posts, and a commercial link in every post.

Outbound links. Unrelated niches side by side: a marketing blog that links to crypto, casino and CBD sites.

History. A topic switch between the archived version of the domain and the current one.

Blocked crawlers. Many networks block SEO tools so competitors cannot see their links. That hides nothing from Google, and the block is itself visible to anyone who checks.

The link graph. This is the largest footprint. Every site in the network links to the same small set of money sites. Google’s spam systems model relationships between sites, and no amount of hosting variety changes who links to whom.

Growth shape. A money site whose referring domains jump suddenly, then stop.

These are the same signs you should look for when a seller offers “private” links, or when an agency will not say where its links come from. How to vet a publisher turns them into a checklist.

What happens when one is found

The usual outcome is not a penalty. The whole network is devalued at once: the links stay live and pass nothing. Nobody is told. The operator finds out when rankings slide.

Manual actions for unnatural links also happen, and networks can be removed from the index in batches. Google said with its March 2026 spam update that once the effect of spam links is removed, the ranking benefit is lost and cannot be regained by cleaning up. Google link penalties and recovery covers both routes.

How long a network lasts is uncertain. ICODA gives an average of about three years for a well-kept network. Our research suggests modelling 6 to 18 months, and far less where footprints are sloppy.

A decision framework

Work through these in order. A “no” at any step ends the question.

1. Can the money site be lost? If it is a brand, a client’s site or a licensed operator, do not use a PBN.
2. Does every competitor in the top ten use them? In casino, payday, adult and pharma results that is often the case. There a network is a cost of entry, on sites built to be replaced.
3. Can you afford to do it properly? That means real content, real hosting variety, and fewer than one money-site link per ten posts. If not, public PBN links are money wasted.
4. Does the sum work? Monthly revenue from the rankings must exceed the network’s cost divided by the months it is likely to survive. Use 6 to 18 months.
5. Is everything isolated? No shared accounts, no links between network sites, and separate money sites per network.

Many groups in high-risk markets run what is called a barbell: the licensed brand domain stays clean, and affiliate or satellite sites take the risk at arm’s length. Three caveats apply. Regulators increasingly hold licence holders responsible for their affiliates. Google can connect assets through hosting, analytics, link and redirect patterns. And the disposable side has no residual value, so its real cost includes rebuilding it again and again.

The rule we would publish: never apply a tactic to an asset whose loss you cannot afford, and never assume a wall between assets that share footprints.

Who uses them

Churn and burn affiliates, and operators in high-risk verticals. The iGaming hub describes that market. For them a domain is a consumable.

When not to use one

For nearly everyone else, the answer at step one is no. A network that costs several thousand dollars a year will pay for a meaningful number of vetted placements or a digital PR campaign, and those links belong to a site you get to keep. If an agency’s links turn out to come from sites it owns, ask for the method to be disclosed per link, in writing.