How Much Should You Spend on Google Ads? A UK Budget Guide for 2026
"How much should I spend on Google Ads?" is the first question every business asks. And the honest answer is: it depends on your industry, your margins, and what a customer is worth to you. This guide walks you through a simple framework for calculating the right budget with real UK numbers.
The Wrong Way to Set a Google Ads Budget
Most businesses set their budget in one of two ways, and both are wrong.
"We'll start with £500 and see what happens." This is throwing a number at the wall. There's no connection between £500 and what your business actually needs.
"Our competitor spends £3,000 so we should too." What your competitor spends tells you nothing about whether their campaigns are profitable.
The right way to set a budget starts with your business numbers, not arbitrary figures or competitor guesswork.
"We'll start with £500 and see what happens." This is throwing a number at the wall. There's no connection between £500 and what your business actually needs.
"Our competitor spends £3,000 so we should too." What your competitor spends tells you nothing about whether their campaigns are profitable.
The right way to set a budget starts with your business numbers, not arbitrary figures or competitor guesswork.
Start With Your Business Maths, Not Google's Suggestions
Step 1: What's a customer worth to you? Not just the first transaction. The total value over the relationship. A gym member paying £40/month who stays for 18 months is worth £720. A dental patient who visits twice a year for 5 years at £200 per visit is worth £2,000.
Step 2: What can you afford to spend to acquire that customer? A common benchmark is 10-25% of the customer's first-year value.
Step 3: What does a click cost in your industry? UK average CPCs in 2026 range from under £1 for low-competition e-commerce to £7-9 for legal services.
Step 4: What's your website's conversion rate? If 5% of visitors take action and clicks cost £3, you need 20 clicks to get one lead. That's £60 per lead.
Step 5: How many customers do you want per month? If you want 10 new customers and each costs £240 to acquire, your budget needs to be £2,400/month.
Step 2: What can you afford to spend to acquire that customer? A common benchmark is 10-25% of the customer's first-year value.
Step 3: What does a click cost in your industry? UK average CPCs in 2026 range from under £1 for low-competition e-commerce to £7-9 for legal services.
Step 4: What's your website's conversion rate? If 5% of visitors take action and clicks cost £3, you need 20 clicks to get one lead. That's £60 per lead.
Step 5: How many customers do you want per month? If you want 10 new customers and each costs £240 to acquire, your budget needs to be £2,400/month.
UK Google Ads Costs by Industry (2026 Benchmarks)
E-commerce and retail: £0.50-£2.00 per click. Lower CPCs but you need volume.
Hospitality and travel: £1.00-£3.00. Seasonal variation.
Health, fitness, and wellness: £1.50-£4.00. Local keywords are competitive.
Home services and trades: £2.00-£6.00. Emergency keywords are expensive but convert well.
Professional services: £4.00-£9.00. High CPCs but high customer lifetime values.
Medical and aesthetics: £2.00-£5.00. Treatment-specific keywords vary widely.
B2B and SaaS: £3.00-£8.00. Smaller audiences, higher CPCs, but deal values justify the cost.
Hospitality and travel: £1.00-£3.00. Seasonal variation.
Health, fitness, and wellness: £1.50-£4.00. Local keywords are competitive.
Home services and trades: £2.00-£6.00. Emergency keywords are expensive but convert well.
Professional services: £4.00-£9.00. High CPCs but high customer lifetime values.
Medical and aesthetics: £2.00-£5.00. Treatment-specific keywords vary widely.
B2B and SaaS: £3.00-£8.00. Smaller audiences, higher CPCs, but deal values justify the cost.
Realistic Monthly Budgets by Business Type
Local service businesses (plumbers, dentists, salons): £500-£1,500/month starting budget.
Gyms and fitness studios: £500-£1,500/month. At £2-3 per lead, even £500/month generates 150-250 leads.
Restaurants and hospitality: £500-£1,000/month. Highly seasonal.
E-commerce (small to mid-size): £1,000-£3,000/month. Start with best-selling products.
Medical and aesthetic clinics: £1,000-£2,500/month. High patient lifetime values.
B2B and professional services: £1,500-£5,000/month. Higher CPCs, longer sales cycles.
E-commerce (large catalogues): £3,000-£10,000+/month.
Gyms and fitness studios: £500-£1,500/month. At £2-3 per lead, even £500/month generates 150-250 leads.
Restaurants and hospitality: £500-£1,000/month. Highly seasonal.
E-commerce (small to mid-size): £1,000-£3,000/month. Start with best-selling products.
Medical and aesthetic clinics: £1,000-£2,500/month. High patient lifetime values.
B2B and professional services: £1,500-£5,000/month. Higher CPCs, longer sales cycles.
E-commerce (large catalogues): £3,000-£10,000+/month.
Let's Calculate Your Budget Together
If you want help calculating the right budget for your business, book a free strategy call. We'll run the numbers together and give you a realistic picture of what Google Ads could deliver at different spend levels.
Book a Free Strategy CallThe Minimum Budget Trap
There's a real danger in spending too little. If your budget is so small that you only get 5-10 clicks per day, Google doesn't have enough data to optimise. Smart Bidding needs 30-50 conversions per month to work effectively.
If you can only afford £500/month, that can still work for local businesses in low-competition markets. But focus that budget on 2-3 of your most important keywords rather than spreading it thin.
If you can only afford £500/month, that can still work for local businesses in low-competition markets. But focus that budget on 2-3 of your most important keywords rather than spreading it thin.
How to Scale Your Budget Without Wasting Money
Scale by campaign, not by account. Identify which campaigns are most profitable and increase budget there first.
Scale in increments, not jumps. Increase budget by 15-20% at a time, not 100%.
Add new campaigns rather than expanding existing ones. This gives you new inventory without degrading what's already working.
Watch your cost per acquisition, not your spend. The moment CPA starts rising faster than budget, you've hit a ceiling.
Scale in increments, not jumps. Increase budget by 15-20% at a time, not 100%.
Add new campaigns rather than expanding existing ones. This gives you new inventory without degrading what's already working.
Watch your cost per acquisition, not your spend. The moment CPA starts rising faster than budget, you've hit a ceiling.
What About Agency Management Fees?
Percentage of ad spend: Usually 10-20% of your monthly ad budget.
Flat monthly fee: A fixed amount regardless of ad spend. Typical range £500-£2,000/month.
Hybrid: A lower flat fee plus a small percentage of spend.
The most expensive option is usually managing it yourself badly. The hidden cost of wasted ad spend far exceeds any agency fee.
Flat monthly fee: A fixed amount regardless of ad spend. Typical range £500-£2,000/month.
Hybrid: A lower flat fee plus a small percentage of spend.
The most expensive option is usually managing it yourself badly. The hidden cost of wasted ad spend far exceeds any agency fee.
What We'd Recommend
We always start clients with the minimum budget needed to get meaningful data, then scale based on results.
£500-£1,000/month for local service businesses with limited competition. £1,000-£2,500/month for clinics, professional services, and competitive local markets. £1,500-£5,000/month for e-commerce and B2B with national reach.
We prove the numbers at a small scale before recommending you spend more. If the first £1,000 generates £5,000 in revenue, the conversation about scaling to £3,000 is easy.
£500-£1,000/month for local service businesses with limited competition. £1,000-£2,500/month for clinics, professional services, and competitive local markets. £1,500-£5,000/month for e-commerce and B2B with national reach.
We prove the numbers at a small scale before recommending you spend more. If the first £1,000 generates £5,000 in revenue, the conversation about scaling to £3,000 is easy.
Written by Gal Shlomai
Founder, Advertising Precision
Gal helps UK businesses transform paid advertising into a predictable, profitable growth engine. With a tracking-first approach and founder-led campaigns, every pound of ad spend is accounted for.
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Let's Calculate Your Budget Together
If you want help calculating the right budget for your business, book a free strategy call. We'll run the numbers together and give you a realistic picture of what Google Ads could deliver at different spend levels.
Book a Free Strategy Call