When to plan technical SEO costs and pricing in your budget

What to take away

All figures are in pounds sterling, typical for England and the UK, and exclude VAT unless stated.

Where the money goes

Technical SEO budgets usually split into four cost centres: audit and discovery, remediation, tooling, and monitoring. Each is approved differently and often paid from a different pot.

Remediation is normally the biggest line. Fixes go through a development queue with its own priorities, so the real cost is developer time rather than SEO time. For example, a site with 12,000 URLS might need 60 to 120 developer hours in its first quarter of fixes, as an illustrative figure.

Tooling is small but recurring. A crawler licence, a log-file analyser and a monitoring tool can total £150 to £600 a month at mid-market scale, again as an illustrative figure.

The audit is typically the cheapest item and the easiest to over-buy. Narrow it to one question, such as why category pages fell out of the index, instead of commissioning everything at once.

Our technical SEO cost guide: data and sources shows where each band comes from, which helps when you are checking a quote line by line.

Budget by site size

Illustrative annual budgets, excluding salaries, vary widely by estate size. A brochure site with a few hundred URLS might sit at £3,000 to £6,000. A mid-market ecommerce site with 10,000 to 50,000 URLS might sit at £20,000 to £45,000.

A multi-domain enterprise estate usually starts around £60,000 and rises with localisation and release frequency. Treat those bands as a starting point for a conversation with finance, not a benchmark you have to hit.

Template count matters more than page count. A 5,000-page site with 12 templates is usually cheaper to audit than a 2,000-page site with 40.

Small sites spend most of the budget on a single audit and a short remediation sprint. Larger estates spend proportionally more on retainer time and tooling, because fixes keep arriving with each release.

Day rates and retainer bands

Day rates depend on who does the work. As an illustrative comparison, a freelance senior specialist might quote £450 to £750 a day. An agency blended rate of £700 to £1,200 a day also covers account management and review.

For reference, the Crown Commercial Service publishes a rate card for digital specialists through its Digital Outcomes and Specialists framework.

Retainers are usually sold as a bundle of days or sprints. Illustrative bands run from about £700 a month for light monitoring to £2,500 a month for fortnightly delivery.

Treat those as planning bands for a quote conversation, not published market data. Ask a supplier to split a retainer into days, deliverables and the tooling they bill separately.

Watch for rate cards that price junior delivery at senior rates. Ask who runs the crawl, who writes the ticket and who signs off the fix.

One-off audit pricing

Illustrative project fees for a single technical audit start under £3,000 for a site below roughly 1,000 URLS. A mid-market site might be quoted £3,000 to £9,000, and a multi-domain estate £12,000 or more.

Price tracks access as much as size. Log files, a staging environment and a named developer contact cut the time an auditor spends guessing at causes.

The deliverable format matters too. A deck with 40 recommendations is cheaper to produce than a prioritised ticket list with acceptance criteria, but the ticket list is far more likely to ship.

A useful ticket list might include: fix 404s from retired product URLs, add canonical tags to filtered category pages, and defer non-critical scripts on the product template.

Fix the scope in writing: how many templates, how many crawl samples, and whether a re-crawl after fixes is included.

Language and currency variants add work, because each locale needs its own crawl sample and hreflang check.

Run the free checks first. Google's guidance on debugging a search traffic drop walks through confirming the drop is real, checking for manual actions and security issues, and ruling out indexing faults.

That process takes an afternoon and often changes what you buy. If the cause is a blocked directory, the fix is a single ticket, not a retained programme.

If the checks come back clean and performance is still falling, you have a defined starting point for a paid diagnostic.

What changed for audits

Interaction to Next Paint replaced First Input Delay in March 2024. Google's explanation of the INP metric sets the thresholds at 200 milliseconds or less for good, 200 to 500 milliseconds as needing improvement, and above 500 milliseconds as poor.

The change widened scope. Responsiveness now measures the slowest interactions across a visit, so scripts that load late in the page lifecycle can move the number.

If your last audit predates the switch, part of what you paid for describes a metric Google no longer collects. Re-scope that section rather than re-buying it.

Ask which templates have enough field data to score. Low-traffic templates often fall below the reporting threshold, so a responsiveness review may not cover them.

Scripts added by tag managers and consent tools are a common cause of slow interactions. An audit that ignores them will miss why a template scores badly on a phone.

Tooling costs line by line

Subscriptions accumulate quietly. A desktop crawler might cost £50 to £200 a month, and a cloud crawler with scheduling £150 to £500.

A log-file analyser adds £100 to £400 a month, and a Core Web Vitals monitor £30 to £150. Add change detection if you run a large template estate.

Per-URL pricing starts to bite above 100,000 URLS. Check whether the vendor bills annually, because that makes the first year look cheaper than it is.

Cut tools nobody has opened for a quarter. A stack costing £700 a month is £8,400 a year, which is a sizeable share of a mid-market retainer.

Migration and replatforming costs

A migration concentrates risk into a few weeks, so the support fee sits outside a steady-state budget. Illustrative fees for a mid-market migration run from £8,000 to £25,000. Multi-domain projects and platform changes push that higher.

The cost drivers are redirect mapping, URL inventory, template parity and a pre-launch crawl. Each is a deliverable you can price separately.

Budget for a post-launch watch period of two to four weeks. Indexation problems after a migration often surface in the second week, once crawling catches up.

If the migration slips, the support fee does not shrink. Ask how the supplier charges for moved dates.

Comparing reactive and planned budgets

The table below uses illustrative annual figures for a mid-market retailer with 8,000 URLS. A planned approach changes the mix more than the total.

The planned column is larger, which is not the argument for it. The reactive column hides developer hours in other teams' budgets, so the comparison flatters it. What improves is predictability: dates get booked, tickets carry acceptance criteria, and someone owns the re-crawl.

Hidden costs to budget for

Internal time is the line most often missed. Someone has to join calls, review tickets and unblock developers, and that person is rarely billed to the project.

Queue time is a cost even when the developer is salaried. A fix that waits six weeks delays whatever return it was meant to produce.

Compliance work can force template changes. The ICO's guidance on the data protection fee sets out which organisations across the UK pay the annual fee and how the tiers work, and that belongs in operating costs.

Add content rewriting after template changes, analytics reconfiguration and paid staging environments to the same list.

Our page on technical SEO hidden costs: data and sources breaks these down further, which is worth reading before you sign a fixed-fee scope.

Pricing models and risk

Fixed project fees protect the buyer on scope and push the supplier towards narrow delivery. Day rates do the opposite, leaving the buyer carrying the risk of overrun.

Retainers reward a long relationship but drift without a deliverable schedule. Performance-linked fees only work when the metric is one the supplier genuinely controls, such as crawl coverage or indexation.

Nothing here is inherently better. The right model follows from how much you know about the problem and how fast your development queue moves.

A useful test is to ask who carries the cost when a fix does not work. Under a day rate the buyer does, under a fixed fee the supplier absorbs the rework, and under a performance fee both sides argue about attribution.

Our article on technical SEO pricing models: data and sources compares the four structures against migration, replatforming and steady-state work.

In-house or outsourced

Compare like with like before you choose. An illustrative salary band of £45,000 to £65,000 a year is common for a mid-weight technical SEO specialist in England. That looks competitive against an £18,000 retainer, until employer costs and recruitment fees are added.

A hire also needs work to do all year. A retainer can be reduced or paused, and a salary cannot, at least not quickly.

The middle path is a developer plus a fractional specialist. That works when the development queue is genuinely responsive and someone senior reviews the tickets.

Whichever route you take, keep the audit budget separate from the remediation budget, so you can see which one is underperforming.

Building the business case

Frame technical SEO as avoided loss rather than upside. Restoring 5,000 product pages to the index protects revenue you already had, and that argument survives a finance review better than a forecast.

Keep the arithmetic simple. For example, a page earning 800 organic sessions a month at a 1.5% conversion rate and a £45 average order value would be worth about £6,500 a year. Those inputs are illustrative.

If the plan needs external funding, the British Business Bank sets out the finance and support available to smaller firms. That is useful background when you are writing the case.

For a fuller method, see our guide to technical SEO return on investment in England, which covers payback periods and the assumptions that break them.

AI, tooling and skills

AI features have moved into auditing tools, and that shifts the cost mix rather than removing it. Findings are cheaper to generate and more expensive to verify.

A US Government Accountability Office review of AI adoption at the Internal Revenue Service names skills gaps, information quality and strategic management as the problems to address. Those risks also sit inside an agency deliverable.

Budget a review step. A model can describe a template it has never rendered, and a wrong recommendation that reaches a developer costs more than the tool saved.

Expect vendors to charge per crawl or per seat, so an AI add-on usually raises the subscription rather than replacing it.

Setting a budget you can defend

Write the question, the scope and the stop conditions before you ask for prices. Then ask every supplier for the same deliverable so the quotes compare.

Stage payments against output. Tying a second instalment to a ticket list or a re-crawl report keeps the schedule honest.

Set a review date and a kill criterion. If indexation has not moved by the agreed date, the next conversation should be about the diagnosis, not the invoice.

Review the split quarterly. If remediation keeps eating the retainer, the development queue is the constraint. If nothing is being fixed at all, the audit scope was probably too broad.

Our technical SEO: reviews and comparison methods for 2027 sets out how to compare suppliers on evidence rather than presentation.

Common questions

What does a technical SEO audit cost in England?

Illustrative quotes run from under £3,000 for a small site to £12,000 or more for a multi-domain estate. The price tracks crawl complexity, log access and the format of the deliverable, not page count alone.

Is a retainer better value than a project?

It suits sites that ship releases often, because the work arrives monthly. A project suits a rebuild, a migration or a one-off diagnosis with a clear end point.

Can an in-house developer handle the fixes?

Usually yes, and it is cheaper. What external help adds is the crawl, the diagnosis and the quality of the ticket the developer receives.

How do I know the work paid off?

Choose two or three measurable outcomes first, such as indexation coverage or Core Web Vitals pass rate. Check them on a fixed date against the baseline you recorded before the work started.