The cheapest agency is rarely the cheapest
Trades buy agencies the way they buy materials: compare the quote, pick the lowest that looks credible. That logic works for timber. It fails for ad management, because the fee is the smallest part of what you pay. The real cost is spread across the ad budget, the assets you do not own, the creative that never refreshes and the hours you spend chasing. This piece argues that the headline fee is the worst available guide to total cost.
Where the money actually goes
Consider a hypothetical driveway installer spending £1,000 a month on Meta ads. Agency A charges £250 a month. Agency B charges £750. On the quotes, B is three times the price. On the total outlay, A costs £1,250 a month and B £1,750, a 40 per cent difference. Already the gap has narrowed.
Now add performance. Suppose A, with a thin fee, puts the account on autopilot: one set of ads, instant forms with two fields, a report that is a screenshot. Cost per lead £22, lead-to-job rate 6 per cent. That is 45 leads and 2.7 jobs, so roughly £460 per booked job all-in.
Suppose B refreshes creative fortnightly, uses a higher-intent form and feeds booking data back. Cost per lead £35, lead-to-job rate 20 per cent. That is 28 leads and 5.7 jobs, so about £310 per booked job all-in. The agency that cost three times as much on the quote delivered jobs a third cheaper. These numbers are illustrative, but every element of the pattern is one we see described across agency case studies and client complaints alike.
| Agency A | Agency B | |
|---|---|---|
| Management fee | £250 | £750 |
| Ad spend | £1,000 | £1,000 |
| Total monthly | £1,250 | £1,750 |
| Leads | 45 | 28 |
| Booked jobs | 2.7 | 5.7 |
| Cost per booked job (all-in) | ~£460 | ~£310 |
The four hidden costs
The first is spend inefficiency. A cheap fee buys few hours of attention, and an unattended Meta account drifts. Ads fatigue, cost per lead rises, and nobody notices until the quarterly review. The £1,000 you send to Meta does less work every month.
The second is ownership. Low-fee agencies often economise by running every client from a shared agency Business Manager. It saves them admin and costs you your pixel, your audiences and your history when you leave. The mechanism is set out in who owns the ad account; the cost is a restart from zero.
The third is creative. Fresh ads need someone to brief you, edit footage and test hooks. That is labour, and labour is what a low fee cannot fund. The result is stock imagery and the same three ads for six months, which is the pattern described in creative production: in-house or agency.
The fourth is your time. A cheap agency that produces 45 low-intent leads has given you 45 phone calls, most of them wasted. At a tradesperson's hourly rate, chasing poor leads can cost more than the fee itself.
Cheap is not the same as low-cost
There is a difference between an agency that is cheap and one that is low-cost by design. Websites 4 Trades charges £30 a month for a trade website because it has built a repeatable product with a tight scope. Trustmark Trades charges a flat £299 plus VAT for a website-and-local-SEO system that runs on its own software. Both publish the price and the scope, and neither pretends to be a managed ads service.
That is low-cost done honestly: a narrow, systematised product at a price that reflects what it is. The problem is a full-service ads management pitch at a price that cannot possibly fund the hours it describes. If an agency promises weekly optimisation, new creative, qualification and reporting for £200 a month, something in that list is not happening.
How to compare quotes properly
Published pricing helps this exercise, which is why our pricing comparison rewards agencies that show their figures. Roofing SEO Services publishes a range of £499 to £2,599 a month and says the variable is local competition. Leads 4 Local publishes £349, £599 and £999 tiers. You can argue those are expensive or cheap, but you can at least do the arithmetic.
- Ask every agency the same question: what is a realistic cost per booked job for a trade like mine in my area, and what assumptions sit behind it?
- Add the management fee to your planned ad spend and compare totals, not fees.
- Ask how many hours a month your account gets and who does the work. Divide the fee by the hours.
- Ask how many new ads you will receive per month. Zero is an answer.
- Check whether assets will be in your name. If not, price in the cost of rebuilding later.
- Ask for a sample report. A screenshot is a cost in disguise, because it means you cannot tell what you are getting.
When cheap is right
This argument has limits. A trade spending £300 a month on ads cannot justify a £750 fee under any model; the fee would be 70 per cent of total outlay. At that scale the right answer is usually to run the account yourself using the trades playbook, or to buy a narrow, systematised product with a published price rather than a managed ads service.
Cheap is also right for a trade testing whether Meta works at all. A short, low-commitment engagement that produces some leads and some learning is worth having, as long as the account is yours and you can leave cleanly.
Frequently asked questions
Is a cheap Facebook ads agency ever worth it?
Yes, for a very small budget where any larger fee would dominate total cost, or for a short test. In both cases insist on owning the ad account so you can leave with the data.
How do I compare agencies on real cost?
Add fee to ad spend, estimate leads and booked jobs from each agency's own assumptions, and compare cost per booked job. Ask for the assumptions in writing.
What does a low fee usually mean in practice?
Few hours of attention, shared agency-owned accounts, infrequent creative refreshes and thin reporting. Not always, but often enough to check for each.