It's the first question almost every small business owner asks before running Google Ads: "How much do I need to spend?" The honest answer is that there's no single figure that works for everyone, but there is a clear, logical way to work it out. Understanding a sensible Google Ads budget for small business is less about picking a number and more about understanding what you're buying, what you need back, and what the market in your area actually costs.
This guide walks through all of it in plain English.
Why there's no universal answer
Google Ads is an auction. You bid to appear when someone searches for your service, and the cost of each click depends on how many other businesses are bidding on the same keyword in the same location.
A plumber in a quiet rural town bidding on "emergency boiler repair" will pay a very different cost per click from a solicitor in central London bidding on "personal injury claim". The service, the competition, and the location all move the dial.
That said, there are sound principles that apply to any local business trying to make Google Ads work without throwing money at it.
Start with what a new customer is worth to you
Before you set a budget, ask one question: what is a new customer worth to you over their lifetime, or at minimum over a single job?
If a new client is worth £200 to you and you can close one in three leads, then a cost per lead of £30 to £50 leaves you in profit. If a new client is worth £2,000 and you close one in five, you could afford a cost per lead of several hundred pounds and still be well ahead.
This matters because it sets your ceiling. You are not trying to spend as little as possible on ads. You are trying to buy leads that cost less than the profit they generate.
A good Google Ads setup starts with this conversation, not with an arbitrary monthly figure.
What drives cost per click for local businesses
These are the main factors that push your click costs up or down:
- Industry competition. Sectors like finance, legal, and home emergency services (plumbing, locksmithing) attract a lot of bidders. Niche or specialist trades often pay considerably less.
- Search volume. If only a handful of people search for your service each month in your area, the auction stays calmer. High-volume phrases attract more competition.
- Location. Bidding for clicks in a city costs more than bidding in a smaller town. In Torbay and across South Devon, costs are generally lower than in Bristol or London, which gives local businesses a real advantage if they set up their campaigns correctly. Businesses in Torquay and Paignton often find their ads stretch further than they expected.
- Quality Score. Google rewards advertisers whose ads and landing pages are closely matched to what someone searched for. A well-built campaign with a focused landing page costs less per click than a sloppy one pointing at your home page.
- Match types and negatives. Broad keywords attract a wide range of searches, including many that will never convert. Tightly controlled keyword lists with proper negative keywords filter out wasted spend before it happens.
A practical way to set your starting budget
Here's a simple method:
- Estimate your target cost per lead. Based on your profit margin and close rate, decide what you can afford to pay for a new enquiry.
- Estimate your expected conversion rate. If your landing page turns roughly one in ten clicks into a lead, that's a 10 per cent conversion rate. (Brand-new pages without data should be planned conservatively at first.)
- Calculate your cost per click ceiling. Multiply your target cost per lead by your expected conversion rate. If you want leads at no more than £40 and you convert 10 per cent of clicks, you can afford to pay up to £4 per click and stay on target.
- Set a monthly budget. Decide how many leads per month you want, then multiply by your target cost per lead. If you need 20 leads a month at £40 each, your budget is £800.
This approach keeps your spend tied to a real business outcome rather than a vague instinct.
One word of warning: if your cost-per-click ceiling is below what the market actually charges, you will either not win enough auctions to get impressions or you will run out of budget before midday. A realistic audit of click costs in your sector and location, before you set a budget, prevents that from happening.
Common mistakes that eat small business budgets
Running Google Ads without a clear structure is one of the fastest ways to spend money without getting much back. The most frequent problems:
Sending clicks to the home page. Your home page has to do too many jobs. A visitor searching for "emergency electrician Torquay" who lands on a generic page about your whole business is far less likely to call than one who lands on a page about emergency electrical work in Torquay. Landing pages built for the campaign consistently outperform generic pages.
Ignoring search term reports. Google will show your ads for searches you didn't intend. Without regular checks and negative keywords, budget bleeds out on unrelated queries.
Setting and forgetting. An untouched campaign drifts. Bids shift, Quality Scores change, competitors enter and exit. Campaigns that aren't reviewed weekly lose efficiency month on month.
Chasing clicks instead of leads. A high click-through rate is vanity. A low cost per qualified lead is the number that matters. If your reporting doesn't trace every pound to a real outcome, you're flying blind.
If you'd like to see how this ties into the wider picture, our local SEO guide covers the longer-term approach that complements paid search well.
How to test before you scale
The right way to start with Google Ads is to test at a modest budget, gather real data, and then scale what works.
In practical terms, that means:
- Run a tightly scoped campaign for four to six weeks with a controlled budget.
- Track every lead back to the campaign, keyword, and ad that generated it.
- Identify which keywords and ads produce the most leads at the lowest cost.
- Cut or reduce spend on what doesn't perform. Increase spend where you're getting profitable leads.
- Expand to additional services or towns once the core campaign is profitable.
This is how you build a Google Ads account that pays for itself rather than one that burns budget and leaves you frustrated.
The case for professional management
A well-managed campaign generally delivers a lower cost per lead than a self-managed one, for one simple reason: every decision is driven by data and experience rather than guesswork.
Professional management covers keyword research, negative keyword lists, ad copy testing, bid strategies, Quality Score improvement, landing page recommendations, and regular performance reviews. For most small businesses, the time saving alone is significant, before you factor in the performance improvement.
We work with businesses across Torbay and the wider South Devon area, from independent tradespeople to established service companies. If you're curious what Google Ads could realistically cost and deliver for your specific business, you can see the towns we cover on our areas we cover page.
A good website also makes a material difference to how well your ads convert. There's little point paying for clicks that land on a slow or poorly built page. If that's a concern, our web design service is built specifically around conversion, not just aesthetics.
Frequently asked questions
How much should I spend on Google Ads as an absolute minimum?
There's no universal floor, but in practice a budget that's too low often means you don't gather enough data to optimise quickly and you may not win enough auctions to show reliably. The right minimum depends on your cost per click, your target number of leads, and your profit margin. For most local service businesses, a meaningful test requires enough budget to generate at least a couple of dozen clicks per week, so you can read the data within a reasonable timeframe.
Should I run Google Ads or focus on local SEO first?
Ideally both, but they serve different timelines. Google Ads bring leads immediately, which is useful when you need work now or when you're launching something new. Local SEO builds over months and delivers free traffic once it takes hold. Many businesses use ads to generate revenue while SEO is building, then reduce their reliance on paid clicks as organic rankings improve.
How do I know if my Google Ads campaign is actually working?
The only reliable answer is to track every lead back to its source. That means call tracking, form-fill tracking, and clear reporting that shows cost per lead rather than just clicks and impressions. If you can't see how much each enquiry cost you, you can't tell whether the campaign is profitable.
Can I manage Google Ads myself or do I need an agency?
You can manage it yourself, and for very simple campaigns in low-competition sectors it can work. The challenges are time (optimisation requires regular attention), experience (mistakes in account structure cost money), and access to data patterns (an agency managing multiple accounts builds pattern recognition you can't get from one account). Many business owners find the time cost alone tips the balance toward professional management once they're past the initial test phase.
Ready to find out what Google Ads could do for your business?
The best way to get a real answer on what your Google Ads budget for small business should be is to talk through your specific situation: your services, your area, your margins, and your goals. We'll tell you honestly what it takes to compete and what you can expect back.
Book a free strategy session and we'll work through it together, no obligation, no sales pressure.