How to Choose an SEO Agency in the UK (2026 Guide)
A six-criteria framework for choosing a UK SEO agency: methodology, team, pricing, reporting, contract length, and AI search coverage. Plus the 8 questions to ask before signing.
Choose a UK SEO agency on six criteria: declared methodology, named team members, transparent retainer (£1,500 to £8,000+/month for most UK SMEs), reporting cadence, contract length (avoid 12-month lock-ins), and AI search coverage. Shortlist three to five agencies, run a paid audit (£500 to £2,000) with your front-runner before committing to a retainer, and budget three to four weeks for the full process.
The six-criteria framework
| Criterion | What good looks like | Red flag |
|---|---|---|
| Declared methodology | Published process page explaining how they audit, prioritise, and measure | "We do SEO" with no process detail |
| Named team | Senior strategist named on your account; team page lists real people | Anonymous "our experts" language; account passed to juniors |
| Transparent pricing | Pricing tiers or starting-from figures published | "Contact us for pricing" with no range |
| Reporting cadence | Monthly written report plus quarterly review call | Auto-generated dashboard with no commentary |
| Contract length | 3 or 6-month rolling, with notice period | 12-month lock-in with full penalty for early exit |
| AI search coverage | Optimises for ChatGPT, Gemini, Perplexity, AI Overviews, plus Bing | "AI search" mentioned only on the homepage; no actual deliverables |
The four-week process
- Week 1: Define goals (organic revenue, lead volume, AI citations), set budget, build a shortlist of five UK agencies that publish work in your sector. Use our agency directory to filter by specialism.
- Week 2: Discovery calls. Ask the eight questions below. Request proposals from the three best fits.
- Week 3: Review proposals side-by-side. Check two client references each. Commission a paid audit (£500 to £2,000) with your front-runner.
- Week 4: Negotiate contract terms (rolling, notice, scope, KPIs) and sign.
The eight questions to ask
- Who specifically will work on my account, day to day?
- What is your minimum contract length and notice period?
- Can I see two case studies in my sector with traffic and revenue data?
- Do you optimise for AI search platforms (ChatGPT, Gemini, Perplexity, AI Overviews) as well as Google?
- How do you handle Bing optimisation, given ChatGPT indexes from Bing?
- What is your monthly reporting cadence and what is in it?
- How do you measure success beyond rankings (citations, conversions, revenue)?
- What happens if results stall after six months?
Pricing benchmarks for UK SEO agencies
Most UK SMEs pay £1,500 to £3,000/month for small-business SEO, £3,000 to £8,000/month for mid-market work, and £8,000 to £25,000+/month for enterprise. Specialist AI search agencies sit at the upper end of each band. See full UK pricing benchmarks.
What to do next
Use the agency matcher to surface three to five UK agencies that fit your sector, budget, and AI search needs. Or request a free AI visibility audit to see how your site currently performs across AI platforms before you brief any agency.
Related questions
Oliver Mackman
AI Search Analyst, SEOCompare
Oliver leads SEOCompare's editorial and comparison research. With over a decade in digital marketing, he oversees agency evaluation, tool testing, and AI search data analysis.
Last reviewed: 7 April 2026
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