Google Ads and Facebook Ads take the two largest shares of most UK small business paid media budgets, and the argument about which deserves the money has run for over a decade. The frustrating truth is that most comparisons answer the wrong question. The platforms are not competitors for the same job. One harvests demand that already exists, the other manufactures demand that does not. This guide compares them on cost, intent, audience and fit, using sourced 2025 benchmark data, so you can decide based on how your customers actually buy.
What is the real difference between Google Ads and Facebook Ads?
A person typing "boiler repair near me" into Google has a problem and wants it solved now. A person scrolling Facebook at 9pm is relaxing, not shopping. Google Ads lets you bid to appear precisely when the first person raises their hand. Facebook Ads lets you put an offer in front of the second person based on who they are, where they live and what they care about, even though they never asked.
Neither mechanism is superior. Search intent produces warmer clicks but caps your volume at however many people are searching. Feed interruption produces colder clicks but scales far beyond search volume, because you are not waiting for anyone to look for you. A full breakdown of how the search side works sits in this Google Ads guide for UK small businesses.
Which platform has the bigger UK audience?
The same Ofcom research found UK adults now spend an average of 4 hours and 30 minutes a day online outside work, up ten minutes on the previous year. Your customers are on both platforms, in volume, every day. The useful question is not where they are but what state of mind they are in when your advert appears. On Google they are hunting. On Facebook they are grazing. Reach is a solved problem on both sides, which is why the rest of this comparison focuses on cost and intent instead.
Which costs less per click?
The detail matters. WordStream's 2025 Google Ads benchmarks, based on 16,446 US search advertising campaigns running between April 2024 and March 2025, show search costs vary enormously by industry, from $1.60 per click in arts and entertainment up to $8.58 in legal services, with the overall average up 12.88% year on year. On the other side, WordStream's 2025 Facebook Ads benchmarks show traffic campaign clicks actually got cheaper year on year, falling 6.67% to that $0.70 average.
Two caveats for UK readers. These figures are US medians in dollars, so treat them as directional rather than exact for British campaigns, and UK click prices in competitive trades follow the same pattern of expensive search clicks in high value categories. For a sterling view of what search clicks cost here, see this guide to Google Ads costs in the UK.
Which platform generates cheaper leads?
A Facebook click costs roughly a seventh of a search click, yet a Facebook lead costs roughly 40% of a search lead. Why does the gap shrink so much? Intent. Search visitors convert at a higher rate per pound of attention because they arrived with a need. Facebook lead costs also rose sharply, up 20.94% year on year in WordStream's Facebook report, while conversion rates on lead campaigns slipped from the prior year.
The number the benchmarks cannot show you is lead quality after the form fill. A Facebook lead often filled in a form on impulse and may not answer the phone two days later. A search lead rang you because their tap was leaking. Cheaper leads that close at half the rate are not cheaper. Track enquiries through to booked revenue before declaring a winner, and check your own funnel against these UK conversion rate benchmarks.
Which one converts better?
That near tie hides different mechanics. Google's 7.52% is measured against high intent search traffic landing on your website. Facebook's 7.72% is measured on lead campaigns, where the form often lives inside the app and the friction is deliberately minimal. Frictionless forms inflate conversion rates and deflate lead quality, which is why the follow-up process matters more on Facebook than anywhere else. Ring a Facebook lead within five minutes and it can perform respectably. Leave it overnight and the person has often forgotten they enquired.
The practical rule: Google converts strangers with a problem into enquiries, Facebook converts curiosity into contact details. Your sales process needs to be faster and more persistent for the second kind.
When should a UK small business choose Google Ads first?
The test is simple. Open the Keyword Planner and check whether meaningful UK search volume exists for your service and area. If it does, someone is going to win those clicks, and search is the shortest line between a stranger's problem and your phone ringing. High click prices in categories such as legal services, at $8.58 in WordStream's benchmark data, persist precisely because the work is valuable enough to justify them.
Google is also the right first platform when your product is boring to look at. Nobody stops scrolling for a photograph of drain jetting equipment, but plenty of people search for it in a panic. If you are weighing paid search against organic instead, the trade-offs are covered in Google Ads versus SEO for UK businesses.
When does Facebook Ads make more sense?
Facebook's advantage is that it does not wait for demand. A new cake studio in Leeds has almost no search volume for its own category, but it has thousands of local people who will stop scrolling for the right photograph. Facebook's targeting by location, age and interests lets a small budget concentrate on exactly those people, and the $0.70 traffic clicks in WordStream's data mean awareness is affordable in a way search never is.
Facebook also suits offers with a long consideration window, where the goal is to be remembered at the moment demand eventually appears. The trap is running it like search, with plain text and a "get a quote" ask to a cold audience. Feed advertising is a creative game. The advert has to earn the pause before it can earn the click.
Can you run both on a small budget?
Each platform's machine learning needs conversion volume to work with. Starving both halves means both stay stupid. Pick the platform that matches your customer's buying behaviour, give it a fair test window of four to eight weeks with proper conversion tracking, and only expand once the maths works.
Once you do run both, the combination beats either alone. Facebook creates demand that later shows up as branded searches on Google, so a cheap branded search campaign catches people your feed adverts warmed up. Search data tells you which offers people want, which sharpens Facebook creative. Structuring that handoff between channels is the core of a proper paid media strategy rather than two adverts running in ignorance of each other.
How should you measure which platform is winning?
Set up conversion tracking before spending anything, tag phone calls as well as forms, and record lead outcomes in a spreadsheet or CRM so close rates sit next to lead costs. Review weekly, not daily, because small budgets produce noisy daily data. Give a test its full window before judging it.
Then compare against your margin, not against benchmarks. A $70 lead is cheap for a kitchen fitter and ruinous for a florist. The benchmark figures in this article, all drawn from WordStream's 2025 reporting and Ofcom's 2025 research as covered by ISPreview, are context for your numbers, not targets. The platform that wins is the one that turns advertising spend into booked revenue at a rate your margin can carry, and for many UK small businesses the eventual answer is a deliberate sequence, search first for demand capture, social second for growth, managed as one paid media system rather than a rivalry.
Google Ads vs Facebook Ads for UK SMBs — FAQ
Is Google Ads or Facebook Ads better for a small business?
Neither is better in the abstract, because they do different jobs. Google Ads captures people who are already searching for what you sell, so it tends to win when demand exists and the value of a customer justifies the click cost. Facebook Ads creates demand by putting your offer in front of people who were not looking for it, so it tends to win for visual products, local awareness and offers with broad appeal. The honest answer for most UK small businesses is to start with the platform that matches how customers currently find you. If people search for your service in a moment of need, an emergency plumber for example, start with Google. If your product is discovered rather than searched for, start with Facebook. Judge the result on cost per enquiry and closed revenue, not clicks.
Which is cheaper, Google Ads or Facebook Ads?
Facebook clicks are usually far cheaper, but a cheap click is not the same as a cheap customer. [WordStream's 2025 Google Ads benchmarks](https://www.wordstream.com/blog/2025-google-ads-benchmarks), based on 16,446 US search campaigns, put the average search cost per click at $5.26, while [WordStream's 2025 Facebook benchmarks](https://www.wordstream.com/blog/facebook-ads-benchmarks-2025) put traffic campaign clicks at $0.70 and lead campaign clicks at $1.92. The gap narrows once you measure leads rather than clicks, because search traffic arrives with intent. Both reports are US data in dollars, so treat them as directional for the UK rather than exact. The only cheap platform is the one whose cost per sale sits comfortably inside your margin, and you can only learn that by running a controlled test with proper conversion tracking.
How much should a UK small business budget to test paid ads?
Budget enough to buy a statistically useful number of clicks in your industry, not a round number picked for comfort. Work backwards from click costs. In an expensive category such as legal or home improvement, where WordStream's benchmarks show the priciest clicks, a small daily budget buys only a handful of visits, so a fair test needs more money or more weeks. In cheaper categories the same spend goes much further. A sensible approach is to commit to a fixed test window, usually four to eight weeks, on one platform and one tightly defined offer, with conversion tracking in place before the first pound is spent. Stop judging daily and review weekly. If the maths on cost per enquiry cannot work even in theory at benchmark click prices, fix the offer or the landing page before buying traffic.
Do Facebook Ads still work in the UK, or has everyone left the platform?
The audience has not gone anywhere. Ofcom's Online Nation 2025 research, summarised in [ISPreview's coverage](https://www.ispreview.co.uk/index.php/2025/12/ofcom-finds-uk-adults-now-spend-over-4-5-hours-online-each-day.html), found that Facebook and Messenger together were used by 93% of UK online adults in May 2025, which makes Meta's reach among UK adults about as close to universal as advertising gets. What has changed is the feed itself. Organic reach for business pages is minimal, so treating Facebook as a free channel no longer works, and creative quality now decides results because users scroll past anything that looks like an advert. Facebook Ads still work in the UK for businesses that lead with a genuinely interesting offer, strong imagery or video, and a fast follow-up process for the leads it generates.
Can I run Google Ads and Facebook Ads at the same time?
Yes, and mature accounts usually do, but running both from day one on a small budget is the most common way to waste money. Splitting a modest budget across two platforms means neither gets enough data to optimise, and you end up with two inconclusive tests instead of one clear answer. The better sequence is to win on one platform first, the one that matches your customer's buying behaviour, then add the second once the first is profitable. When both run together they compound each other. People who click a Facebook advert often search your business name on Google days later, so a cheap branded search campaign catches demand that Facebook created. Keep measurement honest by comparing platforms on cost per enquiry and revenue, not on each platform's self-reported conversions, which will both claim the same sale.
