The short answer
Choose an agency only after you have defined the commercial outcome, recorded your baseline and compared relevant evidence, delivery ownership and exit terms. A persuasive proposal is not automatically a suitable one.
Give every supplier the same brief. Then score scope, assumptions, measurement, ownership and handover before comparing price.
Who this guide is for
- Partners appointing external digital support for the first time.
- Decision makers replacing a supplier or reviewing a renewal.
- Firms considering search, web, lead generation or automation support.
Hiring a digital agency is a commercial decision, not a beauty contest. A polished presentation can hide a vague scope, an inexperienced delivery team or a supplier that understands its own services better than your firm.
This guide gives you a decision framework. It does not rank agencies or hand you a list of names. It helps you define the job, compare suppliers on relevant evidence, protect access to accounts and data, and walk away when the terms are wrong.
Start with the problem, not the service
“We need SEO” or “we need a new website” describes an activity, not an outcome. Before contacting anyone, describe the business problem in commercial terms.
Write down the outcome you want, your starting position, your constraints and the person responsible for decisions. If search visibility is in scope, Google's SEO Starter Guide is useful context for assessing promises that no supplier can guarantee.
Decide what type of help is actually needed
An agency is not always the right answer. A specialist agency suits a substantial outcome. A broader agency can help when several channels must work together. A freelancer can be better for a defined task. An internal hire makes sense when the work is continuous enough to justify salary, training and management time.
Ask whether this is a project or an ongoing function, whether you need one deep specialism or several disciplines, and whether your team can manage the work or needs the supplier to lead it.
Check relevant evidence, not just credentials
A credential list tells you what an agency has done for somebody else. It does not tell you whether it can do this job, for your firm, inside your constraints. Focus on relevant evidence.
- Ask for comparable work in your sector or with your type of commercial problem.
- Meet the people who would actually deliver the work.
- Ask how success will be measured and against which baseline.
- Request references for comparable work and ask about delivery when plans changed.
- Ask which assumptions sit behind the proposal and what changes if one is wrong.
Compare proposals on scope and ownership
A lower price can mean a narrower scope, more assumptions or less senior input. Score what you would actually receive and what your firm would control.
| Area | What to check |
|---|---|
| Scope | Clear deliverables, named exclusions and no open-ended promises. |
| Assumptions | Key assumptions stated, with the effect on price and timing if they change. |
| Delivery | Named people, realistic milestones and a clear account lead. |
| Measurement | A baseline, reporting rhythm and a person accountable for explaining results. |
| Ownership | Access to accounts, data, content, source files and code agreed in writing. |
| Exit | Notice, handover support and what you keep defined before signing. |
If a supplier processes personal data for your firm, the Information Commissioner's Office explains the importance of a written controller-processor contract and its minimum terms. Read the ICO contract guidance and use appropriate professional advice where needed.
Questions to put to every agency
- Who will do the daily work and what relevant experience do they have?
- How will success be measured and what is the baseline?
- What will you deliver in the first 90 days?
- What do you need from our team and how much time will it take?
- Who owns the accounts, data, content and source files?
- What happens if the relationship ends?
- Can we speak to a current client with a comparable scope?
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Pause if there is no agreed outcome, no person who can approve work, no baseline, no internal time to supply inputs or a budget that cannot support the scope. Each problem is fixable. Fix it before briefing an agency, not after signing.
Frequently asked questions
The questions firms ask before appointing an agency.
How do I choose a digital agency?
Define the business outcome first. Then compare relevant evidence, delivery ownership, scope, measurement and exit terms. The proposal should make each one easy to inspect.
What should I ask before hiring an agency?
Ask who will deliver the work, how success will be measured, what is included and excluded, what the agency needs from your team, and what happens to the accounts, data and assets if the relationship ends.
Should my firm own its website and marketing accounts?
Agree account access, asset ownership and handover arrangements in writing before appointing a supplier. Contractual and data protection requirements vary, so use appropriate professional advice where needed.
How long should SEO take to show results?
There is no universal timeframe or ranking guarantee. Google says changes can take from hours to several months to appear in search. Set a baseline and assess progress through evidence rather than promises.
Sources and useful reading
- Google Search Central, SEO Starter Guide.
- Information Commissioner's Office, contracts and liabilities between controllers and processors.
- GOV.UK, marketing and advertising law.
This guide is commercial decision support, not legal, financial or data protection advice.