"Are Google Ads expensive?" is a question I get from almost every prospective client. The honest answer is: it depends on whether the maths works for your business. Some businesses can't make Google Ads viable at any budget. Others are generating excellent returns on a few hundred pounds per month. The difference isn't mainly about budget size. It's about CPC, conversion rate, and what a customer is worth.
I had an initial call recently with a solicitor in Conwy who was convinced Google Ads was too expensive after a bad experience spending around £1,500 over three months with no leads to show for it. When I reviewed what he'd been doing, the campaign had broad match keywords, no negative keywords, and the ads were sending traffic to his homepage. The platform wasn't expensive. The campaign was badly built. That's a fixable problem, not an inherent cost issue.
Most people ask "are Google Ads expensive?" when they should be asking "can my business model make the maths work?" Those are very different questions, and only the second one has a useful answer.
This post is for people who are considering whether to start, not people who are already running campaigns and experiencing high costs. If that's you, Why Is Google Ads So Expensive? covers the specific causes of escalating costs in detail.
What you're actually paying for
Google Ads operates on a cost-per-click model. You pay when someone clicks your ad. The click costs vary significantly by sector, location, competition, and Quality Score. There is no flat rate.
A rough sense of the ranges in the UK: local service businesses (plumbers, solicitors, accountants) are typically £2 to £10 per click. Competitive national terms can be £15 to £50 or more. Low-competition e-commerce terms can be under £1. Your actual CPC depends on how many other advertisers are bidding on the same keywords and how relevant Google considers your ad to be.
The most reliable way to get your specific estimate before spending anything: use Google Keyword Planner (free, accessible via a Google Ads account). Enter your target keywords and it will show estimated monthly search volume and typical CPC ranges.
The minimum budget question
A minimum viable budget isn't an arbitrary figure. It's a function of CPC and what the platform needs to learn.
Smart Bidding strategies need roughly 30 to 50 conversions per month to optimise reliably. At a conversion rate of 3 to 5% (reasonable for a well-structured campaign with a decent landing page), that means 600 to 1,700 clicks per month minimum. At £3 CPC, that's £1,800 to £5,100 per month. At £6 CPC, it's £3,600 to £10,200.
Those numbers make many business owners pause. And they should. Google Ads is not the right channel at every budget level for every business. If your average order value is £50 and your CPC is £8, the maths is extremely difficult. If your average order value is £2,000 and your CPC is £5, the maths is very forgiving.
The minimum I'd suggest for a new campaign is enough to generate 10 to 15 clicks per day, which gives the algorithm daily data to work with. Below that, you're accumulating learning so slowly that the campaign may never gain traction. For most UK service businesses, that means at least £30 to £50 per day (£900 to £1,500 per month) to start.
Does your budget match your market?
Before deciding whether Google Ads is "expensive," run the decision-making calculation.
First, what is your target CPA (cost per acquisition)? Work backwards from your customer value and margin. If a new customer is worth £500 to your business and you can spend 20% on acquisition, your maximum CPA is £100.
Second, what is the realistic CPC for your terms? Check Keyword Planner or ask someone who has run campaigns in your sector.
Third, what conversion rate can you realistically achieve? A well-structured campaign sending traffic to a relevant landing page typically converts at 3 to 8% for service businesses. E-commerce conversion rates are lower, often 1 to 3%.
Fourth, does the maths work? If your CPC is £5, your conversion rate is 4%, and your target CPA is £125: each conversion costs £125 (£5 ÷ 4% = £125). That's within your target. If your CPC is £5, your conversion rate is 1%, and your target CPA is £100: each conversion costs £500. That doesn't work.
What makes Google Ads expensive vs. cost-effective
Google Ads feels expensive when the campaign is built badly: broad match keywords pulling in irrelevant traffic, ads sending visitors to the homepage, no conversion tracking, no negative keyword management. Under those conditions, cost-per-acquisition is genuinely high, not because Google Ads is inherently expensive, but because money is being wasted at every stage.
Google Ads is cost-effective when: conversion tracking is accurate, ads match search intent closely, landing pages convert the traffic they receive, and the campaign structure is tight enough that budget concentrates on searches that actually generate customers.
The platform itself is neutral. What you get out of it is almost entirely a function of how it's managed. If you're weighing up whether to bring in help, what Google Ads management typically costs in the UK is worth reading before you commit to a budget.
Is Google Ads right for your budget right now?
The honest answer: if you can't sustain at least £1,000 to £1,500 per month in ad spend, it's difficult to build the data foundation needed for Smart Bidding to work properly, and a lot of the early months will feel like slow going. That doesn't mean it's impossible at lower budgets, but it does mean the learning phase is longer and the results less predictable.
If the budget question is genuinely the main concern, SEO might be a better place to start. Organic traffic has higher setup costs in terms of time but zero per-click cost once you're ranking. The two channels work well together: SEO for sustainable longer-term traffic, Google Ads for immediate targeting and scalability once you know what converts. In a market like North Wales where budgets tend to be smaller, understanding the maths before you spend anything is even more important than it is elsewhere. If you're just getting started, paid advertising fundamentals every local business should have in place covers the essentials.
For a deeper breakdown of the specific reasons Google Ads costs spiral, and what you can actually do about each one, read Why Is Google Ads So Expensive?.
