Home InsightsChoosing a Partner

Choosing a Partner

How to Choose a Digital Marketing Agency: What to Check Before You Sign

Choose a digital marketing agency by testing what it will measure, who does the work, what you will own and what it refuses to do. Ask for enquiries, not impressions, as the measure of success. Insist that ad accounts, analytics and the website sit in your name, and be wary of any agency that recommends every channel to every client.

Prabhu SolutionsPublished 8 October 2026Last reviewed 8 October 202612 min read

On this page

How do you choose a digital marketing agency?
What should you decide before you brief an agency?
Which channels fit which kind of business?
What should you check before you shortlist an agency?
What questions should you ask a digital marketing agency?
How do agency fee structures differ, and what does each reward?
Who should own the ad accounts, the data and the website?
How do you read an agency's reports and case studies?
Which warning signs mean you should keep looking?
When should you not hire a digital marketing agency?
Does a digital marketing agency need to be local?

How do you choose a digital marketing agency?

Choose a digital marketing agency by what you can verify: the measure of success it commits to, the people who will do the work, the accounts you will own, the channels it would refuse to sell you, and how it handles ad spend. Pitch quality tells you about the salesperson. These five tell you about the agency.

The label is almost meaningless. A digital marketing company, an online marketing agency and an internet marketing agency describe broadly the same service, and how a digital agency differs from a marketing agency matters less than who will actually do your work. Decide what you need done first, then look for who does it.

The checks below apply to any supplier, ours included. If you want to see what a joined-up service looks like, digital marketing run as one chain is described separately. If your need is mostly search, picking an SEO agency in particular goes deeper on that one channel.

The point
If you want to see what a joined-up service looks like, digital marketing run as one chain is described separately.

What should you decide before you brief an agency?

Decide the outcome in business terms: how many enquiries, from which customers, worth what to you. Then decide what you can supply, such as a site that can be edited, someone who answers enquiries quickly, and a person who approves copy. An agency can only be held to a target that exists before it starts.

Marketing is a chain: something creates demand, a website converts it, and a process handles the enquiry. Agencies are usually paid for the first link only, and the weakest link sets your results. If the site converts poorly, conversion optimisation often returns more than extra traffic.

Be honest about follow-up. Enquiries that sit in a shared inbox for two days are lost whatever the campaign cost. No agency can fix that from outside, though a system that records where each enquiry came from, such as a CRM built around how you actually sell, makes the whole chain measurable.

The point
No agency can fix that from outside, though a system that records where each enquiry came from, such as a CRM built around how you actually sell, makes the whole chain measurable.

Which channels fit which kind of business?

Start from your situation, not from the agency's menu. Premises or a service area point to local search, urgency points to paid search, a long horizon points to organic search and content, and a precisely definable audience points to paid social. The right agency recommends fewer channels than it could sell.

If this describes you	Channel to ask about	What to ask the agency
You serve a town or a patch and want calls	Local search	Will the Google Business Profile stay in my account, and how will you handle reviews?
You need enquiries this quarter and can test a market	Paid advertising	Whose account does the ad spend run through, and what happens to the data if I leave?
You are building over years and can wait for it	Organic search and content	What will you change on my site in the first month, and who makes the changes?
You can define the buyer precisely, for example by job title	Paid social advertising	Which audience, which offer, and how will you tell if it is not working?
Visitors arrive but few enquire	Conversion work before more traffic	What will you test first, and what will you leave alone?
Your customers buy on trust and visuals	Social media, with realistic expectations	What does success look like, and is it a lead source or a credibility exercise for my trade?
Anything, according to an agency selling everything	Be cautious	Which channel would you start with, and which would you refuse to sell me?

What should you check before you shortlist an agency?

Check five things before asking for a proposal: the measure of success the agency uses, who the named people are, whether it can show work you can inspect, whether it will explain its reporting, and whether a past client will speak to you. Each takes minutes and filters out weak pitches.

The measure of success. Enquiries and cost per enquiry by channel are answerable. Impressions, reach and brand awareness are context. If the first answer is a vanity metric, ask again.
Named people. Find out who plans, who builds, who manages the accounts and whether anything is outsourced. A pitch from one person and delivery by another is common, and you are entitled to know.
Work you can inspect. Ask for live pages, campaigns shown in screenshots from the client's own account, and sites you can visit. Results with no baseline, no period and no absolute numbers are unproven.
A sample report. Ask what a typical report looks like and whether the figures can be checked in your own accounts. If the only source is the agency's own dashboard, you are reading claims.
One past client who will speak to you. Ask what went wrong on their project and how it was handled. Everyone has one. How the agency behaved is the information.

What questions should you ask a digital marketing agency?

Ask what success will be measured as, who owns the accounts, who does the work, what the agency would not do, how tracking gets fixed before spending starts, and how fees and ad spend are handled. Take these to any agency. A vague answer is an answer.

What will success be measured as, and how will I see it myself? Listen for enquiries and cost per enquiry, backed by access to your own data.
Who owns the Google Ads, Meta, Analytics, Search Console and domain accounts? The answer should be you, with the agency invited in as a user.
Who actually does the work, and is any of it outsourced? A named team, a plain answer on subcontractors, and the chance to speak to the person doing the work.
Which channels would you start with for me, and which would you refuse to sell me? An agency that recommends everything has not made a decision.
How will you check the tracking before spending starts? If measurement is unreliable on arrival, nothing reported later can be trusted, including anything flattering.
How are your fees structured, and what do they reward? Retainers, fixed projects, percentages of spend and performance fees each create different incentives; see the table below.
How is ad spend handled? You should pay the platforms directly from your own account so you can see every pound. Bundled invoices that hide media cost deserve a question.
What do you need from me, and what happens if I cannot supply it? Slow approvals, a site nobody can edit or unanswered enquiries all limit what any agency can do.
What happens when a channel stops working? A good answer describes how they decide, and who tells you, when to cut a campaign rather than keep billing for it.
Would you tell me if I do not need an agency yet? The honest ones sometimes say so. Compare with a plain test of whether you need an SEO agency.

How do agency fee structures differ, and what does each reward?

A retainer rewards ongoing work, a fixed project rewards finishing, a percentage of ad spend rewards raising spend, and a performance fee rewards whatever is easiest to measure. None is wrong by itself. Each creates an incentive worth understanding before you sign. These are patterns, not rules about any one agency.

Structure	What it tends to reward	Watch for
Monthly retainer	Steady ongoing effort across a defined scope	Scope that is vague, so effort drifts toward what is easiest to report
Fixed-scope project	Finishing the defined deliverables	Change requests that cost more than expected, and nobody owning results after launch
Percentage of ad spend	Increasing your spend	Little reason to cut waste, because lower spend means a lower fee
Performance-based fee	Whatever is easiest to count	Pressure toward low-value enquiries or a definition of success chosen to flatter
Hourly or day-rate advice	Answering the question asked	Advice that is never carried out, because nobody is paid to implement it

Who should own the ad accounts, the data and the website?

You should, from the first day. Your Google Ads, Meta, Analytics, Search Console, domain and website should sit in accounts in your name, with you as administrator and the agency invited in. If you cannot leave without losing history, you are renting your marketing rather than building it.

Ad spend should go from your card to the platform, not through the agency's account with a markup you cannot see. It also keeps the history of what worked inside your business. How to judge a specialist in this area is covered in choosing a PPC agency, and the work itself in PPC management.

The same reasoning covers the website. If a web build is part of the engagement, ask who owns the code and the hosting, and what handover looks like. A site you cannot take elsewhere makes every later conversation with the agency harder.

The point
If a web build is part of the engagement, ask who owns the code and the hosting, and what handover looks like.

How do you read an agency's reports and case studies?

Read a report for the enquiry first and everything else second. A useful report states enquiries, calls and form submissions against the previous period, shows where each came from, and says what was done and what happens next. Anything that opens with impressions or rankings is about the agency's effort, not your result.

Read a case study for its baseline. A claim of growth needs a starting figure, a period, the absolute numbers and the measure used. Without those it is a slogan. Ask also what else changed during the period, such as seasonality or a new product.

Judge us the same way: the pages in our work are there so you can look at what was built, not take our word for it.

The point
Judge us the same way: the pages in our work are there so you can look at what was built, not take our word for it.

Which warning signs mean you should keep looking?

Keep looking if an agency promises specific results, will not explain its methods, holds your accounts, bundles ad spend into its fee, reports only vanity metrics, or recommends every channel to every client. One is a question to ask. Two or more is a reason to leave the conversation.

Promised results. Nobody controls how an auction, an algorithm or a customer will behave, so a promised outcome is either aimed at something trivial or at you not checking.
Secrecy about method. A proprietary approach that cannot be explained in plain English usually hides little, or something against platform rules.
Accounts in the agency's name. You cannot audit what you cannot open, and you cannot leave cleanly.
Reports that only show activity. Posts published, emails sent and impressions delivered are not outcomes.
The same plan for every client. If the proposal could be sent to any business in any trade with the name swapped, nobody has learned yours.
Long minimum terms with no exit. A notice period is normal. A fee to leave, or work you license back, is not.
A price far below the rest with no explanation. The market pattern behind agency fees is set out in what hiring a digital marketing agency costs. Ask which work is missing.

When should you not hire a digital marketing agency?

Do not hire one when you cannot yet answer enquiries quickly, when the offer is unclear, when one channel is all you need, or when a freelancer could do a defined job at lower cost. An agency adds management and breadth. If you do not need those, you are paying for them anyway.

If the need is one defined task, a freelancer, an agency or an in-house hire is the comparison to make first. If you are unsure which channel to start with, search against paid clicks is the usual first question, and it can be settled before anyone is hired.

If your best customers arrive by referral and few people search for what you sell, spending on a programme to find them elsewhere may be the wrong money. Test demand cheaply and talk to customers about how they found you before you commit to a retainer.

The point
If your best customers arrive by referral and few people search for what you sell, spending on a programme to find them elsewhere may be the wrong money.

Does a digital marketing agency need to be local?

For the work itself, rarely: strategy, campaigns, reporting and reviews run well over video calls and shared documents. Location matters if you want to meet in person, and for local knowledge only where the work depends on it. Judge an agency by what it shows you, not by its address.

Prabhu Solutions is registered at 14 Chester Rise, Oldbury, B68 0SS, in the West Midlands, and works with businesses elsewhere remotely. Our delivery record to date is international rather than UK-based, and we say so plainly. For the regional context, see digital marketing around Birmingham.

To put these questions to us, describe what you want to achieve. If another agency answers them better, hire that one.

Questions people ask about this

What is the difference between a digital marketing agency and an SEO agency?

An SEO agency works on organic search. A digital marketing agency covers several channels, such as paid search, paid social, content, email and conversion work, and should recommend only those that fit. If search is your main need, a specialist may be sharper; see choosing an SEO agency.

How many agencies should I speak to before choosing?

Two or three. Give each the same written brief and the same questions, then compare answers rather than presentations. Ask each what they would start with and what they would refuse to do. The agency willing to argue against a bigger scope is often the one worth hiring.

Should I pay a digital marketing agency a percentage of my ad spend?

Be careful. A percentage rewards the agency when your spend rises, not when your results improve, so cutting waste costs it money. It can work if the percentage is transparent, you hold the account and a separate measure of enquiries is agreed in advance.

How do I know if a digital marketing agency is any good?

A good one names its people, gives you administrator access to your own accounts, reports enquiries before impressions, explains methods plainly and tells you what it will not do. Check claims against your own data, and speak to a past client about what went wrong.

Is a local digital marketing agency better than one elsewhere?

Not for the work, which runs remotely either way. Local helps if you want to meet or the work needs real local knowledge, such as a Google Business Profile for a premises-based business. Judge by evidence, not by postcode, and ask any agency who would actually touch your accounts.

What should I do if my last agency left me with nothing to show?

Recover your accounts first: ad platforms, Analytics, Search Console, domain and website. Then work out what was actually done and what was measured. Only after that decide whether to try again, with a clearer brief and written ownership of every account from day one.

Do I need a full-service digital marketing agency?

Only if you need several channels run together and want one team accountable for the join. A single defined need is often better served by a specialist or freelancer. Test any full-service claim by asking which channels the agency would decline for you.