Link building is the most opaque line item in search marketing. Quotes for what sounds like the same deliverable can differ by an order of magnitude, the unit being sold is rarely defined, and a large share of what is offered violates search engine guidelines in ways that put the buyer's site at risk rather than the seller's. This guide explains how link building is actually priced, what makes one link cost many times another, which models make sense for which businesses, and how to read an offer whose price is the main thing recommending it.
The three pricing models
Per-link pricing quotes a fee for each placement, sometimes with a floor on the publisher's authority metrics. It is easy to compare and easy to game, because metrics can be manufactured. Monthly retainers buy a team's time and usually a target number of placements, which suits businesses that want sustained work rather than a burst. Project or campaign pricing funds a single asset, a piece of original research, a tool, a data study, and the outreach around it, and it is the model most aligned with earning links rather than buying them. Whichever model you are quoted, insist the deliverable be defined precisely: what counts as a link, whether it must be editorially placed, whether it must be followed, and what happens if a placement is removed within a few months.
What actually makes a link expensive
Four things. The publisher's genuine audience and editorial standards, because a site real people read is harder to place on and worth more. The relevance of that publisher to your subject, which matters more than any authority score. The effort behind the placement, since earning a mention through original research or expert commentary costs far more labour than pitching a generic guest post. And the writing itself, if the placement requires an article good enough to publish. A cheap link is cheap because one or more of these is missing, and usually all of them are: a site with no readership, no topical connection, and a page assembled in minutes. Buyers comparing quotes should ask which of the four each price includes rather than comparing authority numbers.
The offers that carry real risk
Google's spam policies describe link schemes plainly, including buying or selling links that pass ranking signals, excessive link exchanges, and large-scale guest posting done purely for links. The consequences fall on the site that benefits, which is yours, not the vendor's. Treat guaranteed placements on named high-authority publishers, private blog networks, bulk packages priced per hundred, and anything with a fixed price list by authority score as what they are: paid placements sold as editorial ones. There is a legitimate adjacent activity, paid sponsorship and advertising, and it is fine as long as the links are marked so they do not pass ranking signals, which is also what advertising disclosure rules expect. A vendor who resists that marking has told you the product is the ranking signal, not the audience.
How to budget sensibly
Start from the gap rather than from a package. Look at what the sites currently ranking for your target queries have that you do not, and decide whether links are actually the constraint; for many businesses the binding constraint is that the page does not exist or is thin, and no amount of links will fix that. Where links genuinely are the gap, a smaller number of relevant, earned placements will outperform a larger number of cheap ones, and the money is often better spent on something worth linking to. Ask any vendor for live examples of placements made in the last quarter for a client in a comparable sector, then read the pages. Whether a real person would read that page is the most reliable test available to a non-specialist buyer.
Questions people ask about link building pricing
Why do quotes for the same thing vary so much?
Because the deliverable is not the same. Cheap links come from sites with no readership and no relevance; expensive ones come from publishers that vet what they publish. Ask what audience, relevance and labour each price includes.
Is buying links against the rules?
Buying links that pass ranking signals is a violation of Google's spam policies, and the risk lands on the site that benefits. Paid placements are acceptable when marked so they do not pass ranking signals, which also aligns with advertising disclosure expectations.
How many links do we need?
There is no number. The useful question is what the pages currently ranking have that yours does not, and whether links are actually the gap. Often the page itself is the problem and links would not fix it.
Retainer or per link?
Per link suits a defined, short campaign and makes comparison easy. A retainer suits sustained work and digital public relations, where the output is coverage rather than a countable list. Define the deliverable either way.