Why can two SEO quotes for the same site be so far apart?
SEO is not a product with a unit price. It is a set of activities whose volume depends on the site, the market and the ambition. When two agencies quote very different amounts for what sounds like the same service, they are usually describing different amounts of work, done by different people, at a different pace.
This guide gives no figures. Any number printed here would be wrong for most readers and out of date for the rest. What follows is the list of things that move the cost, so that you can ask an agency which of them its quote covers and how. The fee structures those costs are wrapped in are explained in how digital marketing agencies price their work.
Site size and technical debt
A site with a few dozen pages can be reviewed page by page. A catalogue with many thousands of product, category and filter pages cannot. It needs crawling at scale, analysis at the level of templates, and rules in place of hand edits. The larger the site, the more of the work is engineering, and the more it depends on your developers or your platform.
Technical debt is the accumulated cost of earlier decisions: a platform that generates duplicate pages, a past migration that left broken redirects, slow templates, scripts that hide content from crawlers, tracking that was never finished. Little of this can be seen from outside without an audit, which is why a quote given before anyone has examined the site is a guess.
Who implements the fixes matters as much as who finds them. Some agencies deliver recommendations and leave implementation to you. Others include development time. Both are legitimate, and they are very different prices. The technical SEO page sets out what that workstream normally involves.
Competition and your starting point
Search is relative. You do not need a perfect site. You need to deserve the result more than whoever holds it now. If the current results belong to established brands with a deep body of content, strong reputations and dedicated teams, the effort required is of a different order from a market where the incumbents have barely tried.
Your own starting point sets the distance to travel. A site with history, some authority and a body of useful content can often gain from reorganising what exists. A new domain with no content and no mentions elsewhere starts further back, and the early months buy foundations before they buy visibility.
Speed multiplies both. The same plan compressed into a shorter period needs more people working in parallel. Even then some parts cannot be hurried, because search engines take time to crawl, assess and trust changes. A quote that promises a fast outcome in a hard market deserves a question about how.
How much content needs to exist
Most of the variable cost in an SEO programme is content. The question is how many pages need to be created or rebuilt for the site to answer what buyers search for, and how demanding each page is.
A page on a specialist subject, in a regulated field, or aimed at an expert reader takes research, a subject expert’s time and careful review. A short page on a simple topic takes far less. AI tools have lowered the cost of a first draft a great deal. They have not lowered the cost of knowing what to write, checking that it is right, or adding the experience that makes a page worth citing.
Ask how the quote counts content: by number of pieces, by depth, and by who writes and reviews them. Ask too whether updating existing pages is included, since improving what you have is often the cheaper route. A method for deciding which pages earn the investment is in sizing a search opportunity by commercial value.
Links, PR and reputation
Search engines treat references from other reputable sites as evidence that a business is worth showing. Earning those references is slow, uncertain and labour-intensive. It involves producing something worth mentioning, such as research, expert comment, a useful tool or a newsworthy story, and then putting it in front of journalists, editors and site owners who are free to ignore it.
That uncertainty is why this line of a quote varies most. Real outreach and digital PR are priced on effort, because nobody can promise coverage. Cheap link packages are priced by the link, which is possible only because the links come from sites that exist to sell them. Those links may be ignored or may harm the site, and that risk lands on you.
Not every business needs a large authority programme. A local firm in a quiet market may need accurate listings, reviews and a handful of relevant local mentions. A national brand in a contested category may need sustained PR. The quote should say which situation it assumes.
Markets and languages multiply the work
Each additional country or language is closer to a new project than to an extra line item. Search behaviour, competitors, vocabulary and buying habits differ by market, so the research has to be repeated. Content has to be written or properly localised by someone who knows how buyers there speak. Machine translation with no review tends to produce pages that read as foreign and perform poorly.
There is technical work as well: a site structure for countries and languages, signals that tell search engines which version serves which audience, and separate measurement for each market. The same applies on a smaller scale to a business with many branches, where every location needs its own accurate presence. If you sell across borders, ask whether the quote covers each market fully or treats the others as copies of the first.
What a low quote usually leaves out
A low quote is not automatically a bad one. A small site in a calm market, with a clear goal and a competent in-house team to implement, may need very little. A freelancer with low overheads can do excellent work for less than an agency. The useful question is what the price assumes.
When a quote is low because something is missing, it is usually one of the items below. Put the same questions to every provider and the quotes become comparable. The companion checklist, how to choose a digital marketing agency, covers the rest of the conversation.
- Implementation: recommendations are delivered and the fixing is left to you.
- Original content: pages are generated in bulk with little expert review.
- Authority work: links are bought in packages or left out entirely.
- Measurement: rankings are reported, while enquiries and revenue go untracked.
- Senior attention: the plan is a template applied by junior staff.
- Strategy: tasks are listed with no reason given for choosing them.
