Quick Answer
Most UK engineering PPC accounts burn budget by chasing volume, treating clicks as the goal and ignoring whether those clicks have any commercial possibility. Engineering PPC done properly is a filter, not a tap. Its job is to bring in a small number of high-fit design engineers, project managers and decision-makers, and to repel students, hobbyists, overseas non-buyers and competitor researchers before any of them cost you a click. A filtered account spends less, generates fewer leads, and produces materially more closed work than an unfiltered one.
There is a familiar conversation in UK engineering companies running PPC. The Google invoice arrives. The number is bigger than the value of the closed work attributable to it. The sales team mentions, again, that the leads feel weak. The MD wonders aloud whether PPC is worth the candle.
The reflex is to switch the campaigns off. The real problem is usually upstream. The account has been set up the way consumer PPC is set up, optimising for clicks, click-through rate and conversion volume, without anyone having decided what type of click is actually wanted. The result is a steady flow of cheap clicks that are not buyers, and a sales team drowning in low-quality leads while the closed work sits stubbornly flat.
What Engineering PPC Actually Does (and What Most Companies Think It Does)
Engineering PPC done well is a precision instrument for attracting a small number of high-fit prospects, not a volume engine for maximising clicks. The metric that matters is the proportion of clicks that have any realistic possibility of becoming a commercially valuable customer, not the total click count or the headline cost per click.
Consumer PPC is a volume game. The audience is huge, the basket size is small, and even a marginal click can be worth taking. Engineering PPC is the opposite. The audience is small, the basket size is large, and a single closed project can be worth the entire annual ad spend. The economics reward selectivity rather than volume.
Most engineering accounts are set up on the consumer logic by default. Broad match keywords. Generic ad copy. Landing pages that try to convert any visitor. A form with two fields. The account hits its conversion target on paper, the cost per lead looks reasonable, and the sales team quietly drowns under the resulting list of unqualified, uncommercial enquiries.
The Cost of Clicks You Should Never Have Paid For
Most engineering PPC accounts pay between £4 and £15 per click, and a significant proportion of those clicks come from students, hobbyists, sales people, overseas non-buyers, competitors doing research, and casual searchers who used a keyword that sounded right. Every one of those is a paid click that has zero possibility of becoming revenue.
A broad-match keyword like “CNC machining” will attract design engineers in active projects, but it will also attract every engineering student writing a coursework essay, every hobbyist with a home workshop, every competitor checking market positioning, and every overseas buyer with no real intent to buy from a UK supplier. The account pays the same per click regardless.
The cumulative cost over a year is significant. A modest £2,500 monthly budget producing 300 clicks a month at an average £8 cost per click is paying for roughly 3,600 visits annually. If a third of those clicks have no commercial possibility, around £9,600 of the £30,000 annual spend has been paid for traffic that could never have become a customer. That money is not recoverable. The only question is whether the next year’s spend repeats the pattern.
Filtering Through Ad Copy: Writing Ads Real Engineers Click and Others Ignore
Ad copy that filters mentions specifics that only a real buyer recognises and cares about: the sector, the certification, the part type, the materials, the volume range. Generic ad copy attracts generic clicks. Specific ad copy attracts a smaller volume of materially better-qualified clicks.
An ad that reads “Precision CNC Machining, UK” pulls everyone. An ad that reads “AS9100-certified subcontract machining for low-volume aerospace components, 5-axis, Leicestershire” pulls a much smaller, much more specific audience. The student does not click. The hobbyist does not click. The overseas buyer with no UK supplier interest does not click. The aerospace design engineer working on a programme that needs exactly that capability clicks.
Writing ads that filter requires a clear view of who you are trying to reach and what they would search for. That sounds obvious. In practice, the vast majority of engineering ads are written by people who have never sat in front of an engineering buyer, do not know what they would search for, and default to safe generic copy that brings in safe generic traffic.
Filtering Through Landing Pages: Not Every Visitor Should Convert
A good engineering landing page is designed to bounce the wrong visitor and convert the right one. It opens with sector specifics, technical proof and certification evidence before it ever asks for an enquiry. Visitors who do not see themselves in that detail leave quickly. Visitors who do, fill in a form that concompanies it.
The typical engineering landing page is a generic capability summary, a logo wall, a phone number and a contact form. It tries to convert everyone. The result is conversion data that looks healthy in Google Ads, and a sales team complaining that half the form fills are unusable.
A filtering landing page does the opposite. It loads with the precise sector, the certifications, the part types, the typical volumes and the kind of engineering problem the company actually solves. A casual visitor scans the first half-screen, decides they are not in the right place, and leaves. A qualified visitor scans the same half-screen, recognises themselves in it, and reads on. The form, when they reach it, is asking for information they are willing to provide because they have already understood that the company is relevant to them.
Filtering Through Form Design: The Last Filter Before Sales Get Involved
The form is the final filter before a sales conversation. Forms that ask for company name, sector, application type and approximate volume filter out tyre-kickers and competitor researchers without losing real buyers. Forms with just name and email let everyone through.
Form design is the part of PPC most often handled by whoever built the website, with no involvement from sales. The result is forms optimised for completion rate rather than lead quality. A two-field form converts at 30 percent and produces a long list of mostly weak leads. A six-field form converts at 12 percent and produces a much shorter list of stronger leads.
The maths of which is better depends entirely on the sales cost of processing each lead. In engineering, where every lead a salesperson chases is a meaningful amount of their week, the shorter, better list is almost always the right answer. The form should ask the questions a salesperson would ask in the first three minutes of a qualifying call. Visitors who will not answer those questions on a form will not answer them on a call either.
Volume PPC vs Filtering PPC: The Difference in Numbers
The commercial difference between a volume-led engineering PPC account and a filtering-led one is significant across every metric that matters: cost per qualified lead, sales team efficiency, closed work per pound of spend, and average order value.
| Dimension | Volume-Led PPC | Filtering-Led PPC |
|---|---|---|
| Primary goal | Maximise click and conversion volume | Maximise closed revenue per pound of spend |
| Keyword selection | Broad, high-volume terms | Specific intent and capability matches |
| Ad copy | Generic, designed to attract | Specific, designed to filter |
| Landing page | Converts any visitor | Bounces wrong visitor, converts right one |
| Form design | Two or three fields | Five to seven qualifying fields |
| Click volume | High | Lower, deliberately |
| Cost per click | Lower headline figure | Often higher per click |
| Cost per qualified lead | High, hidden by raw volume | Materially lower |
| Sales team workload | High, mostly disqualifying | Lower, mostly closing |
| Closed revenue per pound of ad spend | Low to mediocre | Materially higher |
The pattern is consistent. Filtering PPC looks worse on the surface metrics, particularly click volume and conversion rate. It looks materially better on the commercial metrics, particularly cost per closed pound of revenue. Most engineering companies are measuring the wrong column.
Where Intent Keywords Differ From Capability Keywords
Intent keywords describe what a buyer is actively looking for in a particular project. Capability keywords describe what your business does. Most engineering PPC accounts target capability keywords and get capability traffic, which is not the same as buyer traffic.
A capability keyword like “CNC machining services” attracts anyone interested in the topic. A student researching machining for a project. A hobbyist comparing approaches. A consultant building a market report. An engineer in the early stages of curiosity, years away from a buying decision.
An intent keyword like “subcontract 5-axis machining for medical implant prototypes UK” attracts a much smaller and much more commercially loaded audience. The wording itself signals an active project, a specific need, a sector and a UK geographic intent. The volume is lower. The proportion of clicks that have any commercial possibility is materially higher.
Why a Smaller PPC Account Run Properly Outperforms a Bigger One Run Wrongly
A focused PPC account with fifteen to thirty well-built ad groups consistently outperforms a sprawling account with two hundred mediocre ones. The smaller account has less spend exposed to weak targeting, sharper copy, and meaningfully better downstream conversion to closed revenue.
The instinct in engineering PPC is to keep expanding. Add more keywords. Add more sectors. Add more capabilities. The thinking is that more breadth equals more opportunity. The reality is that more breadth equals more spend exposed to weaker targeting, more dilution of the message, and more leads of marginal quality clogging the sales pipeline.
The accounts that work best are the ones built around a small number of carefully chosen intent clusters, each with its own copy, landing page and qualification logic, and each tuned over months until it produces consistent quality. That is unglamorous work. It is also the work that separates engineering PPC accounts that pay for themselves several times over from ones that quietly burn budget for a year before being switched off.
Frequently asked questions
How much should an engineering company spend on PPC?
It depends on average order value, sales cycle length and the maturity of the funnel around it. As a rough guide, most UK engineering companies running effective PPC spend between £1,500 and £8,000 per month, depending on sector breadth and competitive intensity. The number matters less than whether the account is set up to filter or to flood.
How long does it take to see results from filtering PPC?
What's the difference between Google Ads and LinkedIn Ads for engineering?
Google Ads catches active intent: someone searching now for a specific capability or sector. LinkedIn Ads catches awareness building: putting the company in front of design engineers and decision-makers in the right roles, sectors and companies, regardless of whether they are currently searching. Both have a place in a properly set-up engineering funnel.
Why are click-through rates a misleading metric in engineering PPC?
Should we run PPC if our SEO is already strong?
Usually yes. SEO and PPC do different jobs. SEO captures people who already know what they are searching for. PPC captures people earlier or in adjacent searches, and lets you place specific landing pages in front of specific buyer types in a way SEO cannot. The two work together rather than substituting for each other.
How does Brookstone Creative approach engineering PPC differently?
Brookstone Creative is a UK industrial marketing agency built by people with hands-on backgrounds in toolmaking, CNC programming, CAD/CAM engineering, advanced tooling, technical design across plastics, automotive and aerospace, and technical sales. PPC accounts are designed around the way engineering buyers actually search, the ad copy is written in language those buyers recognise, and the whole account is built around closed revenue rather than headline click volume.
About the author
Richard Stinson
Founder, Brookstone Creative Ltd | Leicestershire
Richard built his career across engineering and industrial sales, starting on the shop floor and working through CNC machining, CAD/CAM engineering, technical design, project management and technical sales management across aerospace, automotive, fabrication, cutting tools and specialist manufacturing. He has been the procurement manager researching new suppliers and the sales manager trying to reach those procurement managers. He has seen this shift in buyer behaviour from both sides of it.
