Choosing an SEO agency is a high-stakes decision made with low-quality information. Every agency's pitch sounds the same — "data-driven", "transparent", "results-focused" — and the difference between a great partner and an expensive disappointment only becomes clear months (and thousands of pounds) later. This checklist gives you the questions that separate the two before you sign.

Before you talk to anyone: know what you're buying

Agencies can't scope what you can't describe. Before outreach, write down:

  • Your goal in business terms. Not "rank #1 for X" — "generate 30 qualified enquiries a month from organic search" or "grow organic revenue 40% year-on-year". Rankings are a means; make the agency talk about the end.
  • Your starting point. Current organic traffic, conversion rate, biggest known issues. An agency that doesn't ask for this in the first conversation isn't doing proper discovery.
  • Your constraints. Budget range, internal resources (who'll implement changes? who writes content?), technical limitations, timelines. Constraints aren't weaknesses — they're what make a proposal realistic.

The questions that matter

Strategy and honesty

  • "What would you do in the first 90 days, specifically?" Vague answers ("audit, strategy, quick wins") signal a template process. Good answers name your site's actual issues — which means they've looked before the pitch.
  • "What will you not do?" Reveals philosophy. Agencies that won't buy links, won't guarantee rankings and won't touch certain tactics are telling you their ethics — and ethics predict longevity of results.
  • "What happens if it doesn't work?" Listen for honesty about timelines (SEO takes months; anyone promising page one in 30 days is lying or cheating) and for how they handle underperformance — do they have a process, or just optimism?

Proof and references

  • "Show me results for a business like mine." Not screenshots of ranking reports — traffic and revenue outcomes for comparable businesses, with context on timelines. Case studies should include the starting point, what was done, and how long it took.
  • "Can I speak to two current clients?" The single most revealing question. Great agencies have clients who'll happily talk. Evasive answers here are a red flag you shouldn't need a second one.
  • "Who exactly will work on my account?" The pitch team is rarely the delivery team. Meet the actual people, check their experience, and ask what happens when someone leaves — account continuity matters enormously.

Working practicalities

  • "What do you need from us?" SEO is collaborative. If the agency needs nothing from you — no access, no content input, no technical implementation — they're either not doing real work or planning to bill you for discovering that later.
  • "How do you report, and how often?" You want: monthly reporting minimum, metrics tied to business outcomes (enquiries, revenue — not just rankings and traffic), and a human explaining what changed and why. Automated PDF dumps are not reporting.
  • "What's the contract structure?" Understand minimum terms, notice periods and who owns what (content, links, data, accounts) if you leave. Anything you can't take with you is rented, not bought — price it accordingly.

Red flags: walk away

  • Guaranteed rankings. No one can guarantee Google's results. Guarantees signal either ignorance or manipulation — both end badly.
  • Secret methods. "Proprietary techniques we can't disclose" is how black-hat SEO describes itself. Legitimate SEO is explainable.
  • Rock-bottom pricing. Proper SEO takes real hours from skilled people. Prices far below market mean corners cut — usually link schemes or thin content that risks penalties.
  • No questions about your business. An agency that pitches without understanding your customers, margins and goals is selling a package, not a service.
  • Traffic without context. Proposals boasting traffic growth without mentioning conversion or revenue are optimising for their report, not your business.

Green flags: lean in

They audit before they propose. They talk about your business, not just your website. They set expectations in months and quarters. They explain their methods plainly. Their reporting connects to revenue. Their clients stay for years and say so. None of this is exotic — it's just professionalism, and it's rarer than it should be. Trust the process over the pitch: the agency that asks the hardest questions in the sales meeting is usually the one that does the hardest work after it.

After you've chosen: the first 90 days

Hold them to the plan they pitched: technical fixes shipped, quick wins delivered, content and authority work underway, reporting that shows progress honestly — including what's slower than hoped. Good agencies over-communicate early; it's how trust gets built. And keep your side of the bargain: access granted promptly, feedback given quickly, content input delivered. The best agency relationships are partnerships, and partnerships run both ways. (If you're on the other side — handing over to a new agency — our SEO for startups guide covers building the foundations they'll inherit.)

Pricing models, explained honestly

SEO pricing comes in three shapes, each with honest trade-offs:

  • Monthly retainer (most common): a fixed fee for ongoing work. Good for sustained growth; bad when it becomes a standing charge for declining effort — which is why the reporting and 90-day plan questions above matter. Ask what's delivered each month, specifically.
  • Project-based: fixed scope, fixed price — audits, migrations, site rebuilds. Good for defined work with an end date. Make sure "done" is defined in the contract, or projects drift.
  • Performance-based: pay tied to results. Sounds ideal; in practice, be very careful what "results" means (rankings for cherry-picked keywords are the classic con) and who controls the variables (an agency paid on conversions will want control of the site, the offer and the follow-up — reasonably). If the model seems too good to be true, read the definition of success very carefully.

Whatever the model, the price should reflect senior hours doing real work. If a quote seems impossibly cheap for what's promised, the work isn't what's promised — it's a template, automation, or wishful thinking. There are no economies of scale in genuine expertise.

We're an SEO agency that answers every question on this checklist plainly — ask us. If you're comparing agencies and want a straight second opinion on a proposal you've received, get a free consultation. We'll tell you what we'd do differently, and why.

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