Google Ads - also called Pay-Per-Click or PPC - is one of the most talked-about and most misused tools in small business marketing. Some businesses run it and build a pipeline that funds their growth. Others spend £500 a month for six months, get a handful of poor leads, and conclude that digital marketing doesn't work.
The difference between those outcomes is usually not execution. It's fit. Google Ads works brilliantly for certain business types and economics, and it works poorly for others. This article gives you the honest picture so you can decide whether it belongs in your plan.
What Google Ads actually is
Google Ads is an auction. When someone searches on Google, advertisers bid for the right to appear at the top of the results page for that search term. You only pay when someone clicks your ad - hence Pay-Per-Click.
Your position in results isn't determined by bid alone. Google also scores your ad and landing page for relevance to the search. A tightly targeted ad pointing to a relevant page can outrank a competitor bidding twice as much but sending traffic to their homepage.
For most small businesses, Search ads - the text links at the top of results pages labelled "Sponsored" - are the most relevant format to start with. Display ads (banner images on other websites), Shopping ads (product images with prices), and YouTube pre-rolls are the other main formats.
How costs actually work
The cost per click varies enormously by industry and competition. Understanding your sector's typical cost before committing budget is essential.
| Sector | Typical UK cost per click | Notes |
|---|---|---|
| Legal services | £10 to £45 | Highly competitive. Requires significant budget to compete. |
| Financial services | £5 to £30 | Regulated. Compliance restrictions apply to ad copy. |
| Boiler installation | £4 to £14 | Good ROI when average job value is £2,000 or more. |
| Private dentistry | £3 to £10 | Works well for specific treatments with clear pricing. |
| Building and renovation | £2 to £7 | Works for project-based work. Avoid broad terms. |
| Accountancy | £2 to £8 | Reasonable but SEO often delivers better long-term ROI. |
| Ecommerce | £0.30 to £2.50 | Depends heavily on product margin and average order value. |
| Restaurants and hospitality | £0.40 to £2 | Low-margin sector. There are usually better alternatives. |
Cost per click is only half the equation. You also need your conversion rate - what percentage of visitors actually contact you or buy. If 100 people click your ad and 4 of them enquire, your conversion rate is 4%. At £5 per click that's £500 spent to generate 4 enquiries, or £125 per lead. Whether that's good value depends entirely on what one customer is worth to you.
Which businesses tend to get good returns from Google Ads
High average order or job value
The economics of PPC work best when the revenue from a single customer is large enough to absorb the cost of acquiring them. Solicitors, kitchen fitters, boiler companies, bathroom installers, private healthcare providers, and building firms all tend to fit this profile. When your average job value is £1,000 or more, you can afford a meaningful cost per lead and still turn a healthy profit.
Emergency and urgency services
A person whose boiler has stopped working at 9pm on a January evening is not going to spend time comparing options. They will click the first result that looks credible and call. Emergency plumbers, locksmiths, appliance repair services, and glaziers benefit from this dynamic. The search intent is high and the decision is fast, which means PPC traffic converts at an above-average rate.
Specific services with clear pricing
When someone searches "loft conversion cost Stafford" or "teeth whitening Macclesfield" they know broadly what they want. A well-matched landing page with clear pricing, trust signals, and an obvious next step can convert this traffic reliably. The more specific the search, the warmer the visitor.
New businesses that can't wait for SEO
Organic search rankings take months to build. A new business that needs customers now can use PPC as a bridge while that foundation is laid. It's not a substitute for SEO in the long run but it can generate enquiries in the short term while you wait for organic rankings to develop.
Which businesses tend to get poor returns from Google Ads
Low margin products and services
A restaurant with £15 average spend per head, a florist selling £30 bouquets, a sole trader painter quoting £150 jobs: the maths rarely works. The cost of acquiring a customer through paid clicks will consume most or all of the margin on that first transaction. Unless you have a strong repeat purchase rate and are willing to lose money on the first sale to acquire a lifetime customer, this is a difficult model to make work.
Services where trust is built over time
A financial adviser, a business consultant, a therapist, or a life coach is unlikely to convert a cold click from a Google ad into a paying client. These are considered purchases. A prospective client needs to read your content, understand your approach, see testimonials, and often meet you before they commit. PPC drives cold traffic. Cold traffic does not convert well for high-trust services. Referrals and content marketing are usually better channels here.
Very local businesses with natural footfall
A hair salon on the high street, a local cafe, a corner shop, a village pub: most of your customers are either walking past or already know you. PPC spend often reaches people outside your catchment area or people who are browsing without intent to visit. For these businesses, Google Business Profile and local word-of-mouth typically outperform paid search at a fraction of the cost.
Complex B2B services
Someone searching for "IT support for my business" or "HR consultancy Cheshire" is usually at the beginning of a research process that could take weeks or months. Unless you have a sophisticated lead nurture setup and a dedicated budget, the majority of those clicks will cost you money without generating return. LinkedIn, content marketing, and referral strategies tend to be better fits here.
The real costs and risks you need to understand
It stops working the moment you stop paying
This is the fundamental difference between PPC and SEO. Organic search rankings are an asset - they keep delivering traffic whether or not you're actively spending. PPC is a tap. Turn it off and the traffic stops immediately. Many businesses end up permanently dependent on the spend with no underlying organic presence to fall back on.
Management overhead
A Google Ads campaign left to run without active management will almost always drift into wasting money. Negative keywords, match types, search term reports, bid adjustments, landing page testing, quality score monitoring - there's a real ongoing requirement here. Most small business owners either don't have time to manage this properly or pay an agency, typically £300 to £800 per month, which is a significant addition to the ad spend itself.
Minimum viable budget
Google Ads requires enough volume to generate meaningful data before you can optimise. In most local markets, £300 to £500 per month is the minimum at which you can test and learn usefully. Below that threshold the data is too thin to draw conclusions and you're essentially flying blind.
Click fraud
In competitive local markets, competitor click fraud - where a competitor clicks your ads repeatedly to drain your budget - is a real issue. Google has detection systems but they're imperfect. Industries with expensive keywords and strong local competition are most exposed. Tools like ClickCease can help mitigate this but add further cost.
Rising costs over time
Google Ads costs in most UK sectors have risen consistently as more advertisers compete for the same clicks. What delivered strong returns at £2 per click three years ago may not work at £5 per click today. The platform increasingly rewards sophisticated advertisers with large budgets and dedicated management, which puts smaller businesses at a structural disadvantage.
Alternatives worth considering
Google Business Profile - free
For most local businesses this is the single highest-return action available and it costs nothing. A fully completed and actively maintained Google Business Profile improves your visibility in local search results and Google Maps. The map pack - the three businesses shown above organic results for local searches - often generates more clicks than either organic results or paid ads. Photos, regular posts, responding to reviews, and keeping your information accurate all contribute to your ranking in local results.
Search engine optimisation
SEO takes longer than PPC to build but creates a compounding asset rather than a recurring cost. A page that ranks on page one for a relevant local search term can deliver traffic for years. For most local UK businesses, a combination of well-built technical foundations, locally relevant content, and a strong Google Business Profile will outperform PPC on a five-year view. The investment is typically front-loaded rather than ongoing.
Microsoft Advertising
Bing has around 7% of the UK search market, which is modest but still represents millions of searches per day. Microsoft Advertising (formerly Bing Ads) typically delivers clicks at 20 to 40% less than equivalent Google terms because there are fewer advertisers competing. The audience skews slightly older and is reported to have higher average income. For many businesses it's worth running alongside Google or as a lower-cost way to test PPC before committing larger budgets.
Meta Ads (Facebook and Instagram)
Paid social works differently to paid search. You're reaching people who are not actively looking for what you offer, which means you're interrupting rather than capturing intent. This works well for visual products, impulse purchases, event promotion, and building brand recognition. It works less well for considered services and emergency purchases. Cost per click is often lower than Google but conversion rates tend to be lower too because the audience is less primed to buy. The creative requirements are also higher - a poor image or video will kill the campaign regardless of the budget behind it.
Checkatrade, Rated People, and trade directories
For UK trades and home services businesses, these platforms generate qualified leads at more predictable costs than PPC. The platform itself does the trust-building work, which matters in sectors where homeowners are nervous about who they let through their door. Checkatrade in particular has strong brand recognition in the UK. The downside is less control over lead quality and no asset-building beyond the platform itself.
Content marketing and blogging
Publishing regular, genuinely useful content on your website attracts organic search traffic at zero cost per click. A plumber who writes detailed articles about common boiler problems, bathroom fitting costs, and how to choose a Gas Safe engineer will rank for dozens of relevant search terms over time. This takes six to twelve months to show meaningful results but delivers traffic that doesn't disappear when you stop paying. It also builds authority and trust with potential customers before they've even contacted you.
Email marketing
For businesses with an existing customer base, email marketing consistently delivers better returns than paid acquisition for repeat business. A monthly update to 300 existing customers or past enquirers costs almost nothing and can generate consistent bookings or repeat orders without any cost per click. It's underused by most small businesses and remains one of the highest-ROI channels available when you have a list to send to.
The honest summary
Google Ads is a powerful channel for the right business in the right circumstances. It's not a universal solution and it's not the right starting point for most small businesses that don't yet have the fundamentals in place.
Before spending on PPC, make sure you have a professional website that converts visitors, a fully optimised Google Business Profile, and accurate listings in the main UK directories. Those things build long-term assets. PPC on top of that foundation can accelerate growth. PPC instead of that foundation is usually money poorly spent.
If you do test Google Ads, go in with a specific hypothesis, a defined budget you're willing to spend to get data, a clear measure of success (cost per lead against average customer value), and a plan for what you'll do based on the results. Run for a minimum of three months before drawing conclusions. And track everything - not just clicks, but actual enquiries and revenue.