Most guides to picking a digital marketing agency in the UK are written by agencies that want you to pick them, and it shows.
They tell you to check testimonials, ask about experience and "ignore pricing". None of that separates an agency that will grow your sales from one that will send you a nice PDF every month.
We are an agency too, in Northampton, so read this with that in mind. What follows is the order we would check things in if we were buying, the prices we see UK agencies actually charging, and the signs that should make you walk away.
What UK digital marketing agencies charge
A single-channel retainer from a UK agency usually costs between £1,000 and £3,500 a month, and a full-service retainer runs from about £3,500 to £16,750. Those figures come from Whito's 2026 agency retainer benchmark, which pulled rate cards and survey data from UK agencies between January and May 2026 and excludes VAT and ad spend.
The published-price end of the market is cheaper. Whito's separate study of 128 published prices from 47 UK providers (June 2026) found a median SEO retainer of £799, a median PPC management fee of £470 and a median social media management fee of £358. The author notes that firms publishing prices skew to the budget end, because mid-market agencies rarely publish.
| Service | Published-price median (Whito, June 2026) | Agency retainer range (Whito, May 2026) | What the top of the range buys |
|---|---|---|---|
| SEO | £799/mo (entry tier £447, top tier £1,500) | £1,000 to £3,500/mo | Content and links included, senior time, fortnightly reporting |
| Google Ads management | £470/mo (range £145 to £2,150) | £500 to £1,500/mo, or 10% to 20% of spend | Landing page work, conversion tracking, weekly changes |
| Social media management | £358/mo (range £50 to £1,500) | £800 to £2,500/mo | Strategy, video production, paid social |
| Content marketing | Not published | £1,000 to £3,000/mo | Four to eight long articles a month |
| Email marketing | Not published | £500 to £1,500/mo | Flows, segmentation, testing |
| Website build (one-off) | £520 (range £299 to £4,500) | £3,000 to £6,000 from a regional agency | Custom design, copy, tracking set up |
| Full-service retainer | Not published | £3,500 to £16,750/mo | Several channels under one account lead |
Visionary Marketing's SEO pricing review (August 2026) lands in the same place: freelancers at £300 to £1,000 a month, small agencies at £1,000 to £2,500, mid-market agencies at £2,500 to £6,000. It also lists the costs that get added after the quote: onboarding fees of £1,000 to £5,000 and articles billed at £400 to £800 each.
Ask about those before you compare two proposals.
Location moves the price. Whito gives the example of a £2,000 a month retainer from a Manchester agency that "might be £3,500 from a central London equivalent". The work is the same. You are paying for the postcode.
Pricing models matter as much as the number. A retainer, a fixed-price project and a percentage-of-ad-spend deal each pull the agency's incentives in a different direction, and the percentage model in particular pays the agency more when your budget goes up, whether or not the extra spend converts.
Where UK marketing budgets are heading
Budgets are rising again after a flat year. The IPA Bellwether Report for Q3 2026, published on 15 October, found a net balance of +14.3% of UK firms revising marketing budgets up, with 25.6% raising spend and 11.3% cutting it. That is the strongest reading in nine quarters.
xychart-beta
title "IPA Bellwether: net balance of UK firms revising total marketing budgets up (%)"
x-axis ["Q3 2025", "Q4 2025", "Q1 2026", "Q2 2026", "Q3 2026"]
y-axis "Net balance (%)" 0 --> 16
bar [3.6, 0, 7.3, 6.9, 14.3]
The previous readings were +3.6% in Q3 2025, 0.0% in Q4 2025, and +7.3% and +6.9% in the first two quarters of 2026. For an agency buyer this means two things. Agencies are busier than they were a year ago, so the good ones have less reason to discount. And more of your competitors are spending.
For scale, Gartner's 2026 CMO Spend Survey puts the average marketing budget at 7.8% of company revenue, across 401 mostly large companies. At the other end, 58% of UK SMEs spend under £250 a month on all marketing combined.
The five things to check, in order
Check specialist fit first, then who does the work, then how they report, then the contract, and only then whether they bothered to look at your business. Most buyers do it backwards: they start with the rapport on the sales call and never get to the contract until it is in front of them.
1. Specialist fit
An agency that is good at the channel you need beats one that lists everything. The choice between a full-service agency and a specialist comes down to your budget: under about £3,000 a month, one agency doing SEO, paid, social and web is usually one person doing all four badly.
The same test applies to the freelancer versus agency question. A freelancer at £300 to £1,000 a month can be the right call for a single channel, as long as you accept that holidays and illness stop the work.
Ask what they turn down. An agency that says "we don't do TikTok" or "we don't take ecommerce brands under £50k a month in revenue" has a shape. One that says yes to everything is a reseller.
2. Who does the work
The person on the sales call is often not the person who will run your account, so ask for a name. Then ask how many other accounts that person runs. In our experience ten is manageable and twenty-five means you get an hour a week.
Ask whether any part of the work is subcontracted or sent offshore. There is nothing wrong with that if you are told. The problem is finding out six months in because a Loom video arrives with a different name on it.
These are two of the questions to ask an agency before you sign, and the answers tell you more than any case study.
3. Reporting on outcomes
A good report shows enquiries, sales and cost per sale. A weak one shows impressions, followers and "engagement rate". The difference between an activity report and an outcome report is the single clearest signal of whether an agency expects to be judged on results.
The commonest failure pattern we see is followers up, sales flat: the social numbers climb every month while the till does not move. If the sample report they send you has no revenue or lead line on it, that is the report you will be getting.
Ask to see a redacted monthly report from a current client. Case studies are edited after the fact; reports are what you will actually receive. Then ask what they do in month two when a channel is not working.
4. Contract and ownership terms
You should own every account, pixel, domain and piece of content, and the contract should say so. Google's own guidance on hiring an SEO advises giving read-only access to Search Console at first, not write access, and the same principle runs through everything: the agency works inside your accounts, not you inside theirs.
"The client should ALWAYS own their pixel." Aleksander_Gramm, former agency marketer, UK Business Forums
In the same thread, one consultant described taking over clients whose previous agencies owned the Google Analytics property, the Google Business Profile and the Google Ads account, with "access only via email, or no access at all".
Knowing how to read an agency contract, and what happens to your Google Ads account, domain and analytics when you leave, is worth an hour before you sign and a year of grief afterwards.
Notice periods compound. A twelve-month minimum plus a 90-day notice clause is a fifteen-month contract whatever the cover page says. We run a three-month initial term and then rolling monthly with 30 days' notice, and every account is set up in the client's name from day one.
5. Evidence they looked at your business
The proposal should mention something about your business that is not on your homepage. If it could be sent to your nearest competitor by changing the logo, it was.
A serious proposal names the people on the account, states the first 90 days of work, says what will be measured and shows the price with every add-on included. A lazy one has eight pages of agency history, a services menu and a price on the last page.
Be equally wary of "we'll start with a three-month strategy phase" when no one has asked who your customers are. Strategy is sometimes necessary. It is also sometimes a way to invoice for three months before doing anything.
A 12-point checklist before you sign
Run every shortlisted agency through this list and score them out of twelve. Anything under nine is a no.
- They specialise in the channel you need, and can say what they do not do.
- You have the name of the person who will run your account and have spoken to them.
- You know how many other accounts that person runs.
- They have told you what, if anything, is subcontracted or offshore.
- You have seen a redacted report from a current client with a revenue or lead line on it.
- The proposal mentions something specific about your business, your customers or your market.
- Every ad account, pixel, analytics property, domain and CMS login will be in your name.
- The contract says content, designs and data created for you belong to you.
- The minimum term and notice period, added together, are under six months.
- Ad spend is paid from your card to the platform, with the management fee invoiced separately.
- Set-up fees, content fees and tool costs are listed in the proposal, not discovered on the first invoice.
- They have told you what they would do in month three if the first plan is not working.
Point 10 is argued about. One agency owner in the forum thread above said billing ad spend through the agency is normal for larger firms and fine if platform invoices are passed on. We still prefer the client's card, because it means you can see every pound of spend without asking.
Red flags
Guaranteed rankings, cold outreach, and agency-owned accounts are the three that should end the conversation. Google says it plainly: "No one can guarantee a #1 ranking on Google", and it tells businesses to "be wary of SEO firms and web consultants or agencies that email you out of the blue".
Add these to the list:
- A flat fee that includes the ad buy with no breakdown. The forum poster above saw cases where "as much as 90% went to management fees".
- Results promised inside 30 days for SEO. Paid ads can show movement in weeks. Organic search takes months.
- A price with no scope. "£1,500 a month for SEO" means nothing without hours, content volume and what is excluded.
- Case studies with percentages and no base numbers. A 400% increase in traffic from 50 visits is 250 visits.
- The agency hosts your site and charges a minimum fee for every change. One consultant in the forum thread quoted £150 minimums.
- They cannot tell you about a client they lost, or why.
None of these alone proves the agency is bad. Two together usually do.
What to expect in the first 90 days
By day 90 you should be able to see tracking working, the first changes live, and an early trend in the numbers that matter to you, even if the result is not yet in.
The 90-day test is simple: if the agency cannot show you what has been done, what it has cost and what has moved, the problem is the agency, whatever the explanation.
Timelines differ by channel. Paid search and paid social should produce measurable enquiries inside the first month, because you are buying traffic. SEO is measured in months, and longer in competitive sectors, which is why the 90-day check for SEO is work shipped and early movement, not revenue. Social media without paid support is the slowest route to revenue of the three. For a deeper benchmark on each channel, see what a UK Google Ads agency and a UK SEO agency should cost and deliver. Increasingly, buyers also ask how an agency will keep them visible in AI answers, a newer discipline known as generative engine optimisation.
Set the review date in the contract. Agree now what "working" means in numbers, so that in month four you are comparing a figure to a figure, not a feeling to a sales deck.
Should you do it yourself instead?
Sometimes, yes, but cost it honestly. The real cost of doing your own marketing is the 15 to 20 hours a week taken from selling, hiring or running the business. A founder who bills £60 an hour and spends 15 hours a week on marketing is spending £3,600 a month, which is more than a good single-channel agency charges.
For most firms under about £500k turnover the answer is a hybrid: one channel with a specialist, the rest done in-house to a plan the specialist helped write.
Northampton and the East Midlands
A business in Northampton or the wider East Midlands has two advantages when hiring an agency: regional prices and a market where the agencies know each other. Grant Thornton's Northamptonshire Ltd 2026 report puts the county's top 100 private companies at £10.1bn combined turnover and 39,540 staff, with the business support services group growing turnover 14.4% in a year.
The county formed 8,191 new companies in 2023, taking the total to 53,911. Most of those will never spend £3,500 a month with an agency. They will spend £800 to £1,500, which is the band where the difference between a specialist and a generalist shows fastest.
Regional agencies in Northampton, Milton Keynes, Leicester and Kettering charge in the £1,000 to £2,500 single-channel band, not the London £3,500. London is under an hour by train, so you are not limited to the agencies on your doorstep. Ask any agency, local or not, the same twelve questions.
The one local advantage worth using is the reference. Ask the agency for a client within 20 miles you can phone. In a county this small, an agency that cannot produce one has either just started or has a reason.
The decision rule
Pick the agency whose proposal would be useless to your competitor. Price, headcount and awards all matter less than whether the people you are about to pay have already thought about your customers, and whether you will own everything they build.
If you are weighing up paid media or SEO for a business in Northamptonshire or anywhere in the UK, send us the proposals you have and we will tell you what we would ask, including about our own.