SEO Agency Cost Calculator
What does an SEO agency actually cost in the UK?
SEO agency pricing in the UK varies enormously — from £500/month freelancer retainers to £10,000+/month enterprise programmes. This calculator uses real market benchmarks to give you a credible SEO agency cost range for your specific site, sector and goals, plus the reasoning behind the number.
Tell us about your site.
Every input updates your estimate instantly — nothing is sent anywhere.
Realistic monthly SEO agency cost.
What’s driving this number
How we calculate this +
1. Start with site size
Pages roughly track the scope of technical and content work: a 15-page brochure site needs far less ongoing optimisation than a 300-page ecommerce catalogue. We set a baseline range for small (1–20 pages), medium (21–100) and large (101+) sites, drawn from typical UK agency day-rate models.
2. Adjust for competition
Sector and goal both change how contested the search results actually are. A local plumber competing on “plumber in [town]” needs far less budget than a fintech company chasing national, high-volume commercial terms — so we weight the baseline up or down accordingly.
3. Factor in your starting point
A site with no SEO history often needs less budget early on (foundational fixes first), while an “established” site chasing the next tier of rankings usually means harder, more expensive competitive work — content depth, digital PR, and technical nuance.
DIY, freelancer, agency or enterprise?
SEO agency cost isn’t the only route to rankings — it’s one point on a spectrum. Here’s how the main options in the UK market typically compare on price and what you actually get.
- Tool subscriptions only (Ahrefs, Semrush, etc.)
- Your own time — often 5–10 hrs/week
- Works for very small, low-competition niches
- No dedicated strategy or technical depth
- One person, part-time on your account
- Good for tightly-scoped local work
- Limited bandwidth for content + links + technical together
- Quality varies enormously
- Small team: strategist, content, technical, outreach
- Realistic for most competitive local & national work
- Reporting, roadmap, ongoing optimisation
- Typical UK SEO agency pricing sweet spot
- Multi-market, multi-team programmes
- High-competition national or global terms
- Dedicated data, dev & digital PR resource
- Large ecommerce or category-leading brands
Want a proper scope, not just a range?
This calculator gives you a credible starting estimate for SEO agency cost. If you want it turned into an actual proposal — with a fixed monthly retainer, deliverables and a 90-day plan — send us your result and we’ll come back with real numbers.
What actually drives your SEO cost.
Four things drive the range this calculator produces, and it is worth knowing which one is inflating your number. Competition comes first: ranking in a crowded national market takes far more content and link work than a single local service area, and that lands directly in monthly hours. Site size and technical condition come next, because a large site carrying migration debt, duplicate URLs or a slow platform needs remedial engineering before content work pays for itself. Then scope — content production, technical SEO, link acquisition and reporting are priced separately, and most disappointing retainers are the ones where only one of the four is genuinely funded. Finally timeframe: compressing a twelve-month plan into six costs more per month, not less. If the estimate looks high against your budget, the right move is usually to narrow the scope to one cluster of pages rather than to buy the same scope more cheaply.
A useful sanity check on any quote is to divide it by a realistic blended day rate and ask what is genuinely being bought. A retainer of £1,500 a month buys perhaps three to five days of senior time once account management and reporting come out, which is enough to move a handful of pages rather than rebuild a site. Ask for deliverables in hours or units instead of adjectives, and treat any proposal that funds reporting and calls more heavily than the work itself with caution.
Related tools.
A budget decision is easier with two more numbers in front of you: what your traffic is worth today, and how much of the work is now AI-search work.
- SEO Traffic Value Calculator — see what your current organic traffic is actually worth, and the value sitting in positions four to twenty, before you settle on a budget. A retainer is easier to justify against a figure than against a feeling.
- GEO Readiness Checklist — check your AI-search readiness. Being cited by ChatGPT, Perplexity and AI Overviews is a growing share of what an SEO budget now has to cover, and the checklist shows how much ground you have to make up.
