Google Ads break-even calculator for UK SMEs
Use this calculator to test whether a Google Ads campaign could make commercial sense for your business. Enter your average sale value, profit margin, conversion rate and expected click costs, and it will estimate your break-even cost per lead, the enquiries you would need and the likely monthly spend.
The result is directional. It does not guarantee campaign performance, but it helps you see whether the numbers are realistic before spending money.
How to use the result
This calculator is useful because it shows the relationship between cost per click, website conversion rate, enquiry quality and sales conversion.
If the numbers do not work, increasing the budget is rarely the answer. The better first steps are usually:
- improve the landing page
- tighten the search terms
- remove poor-quality enquiries
- improve call handling and follow-up speed
- focus on higher-value services
- improve the offer or quote process
- track which enquiries become real customers
Google Ads can work well for SMEs, but only when the commercial model works behind the campaign.
Example: local service business
A local service business has an average job value of £500 and a gross margin of 40 percent. That means each completed job produces around £200 of gross profit before marketing costs.
If the business converts 30 percent of enquiries into customers, the break-even cost per lead is around £60.
That does not mean the business should happily pay £60 for every lead. It means £60 is the rough point where the campaign stops producing gross profit before overheads. A safer target would usually be below that figure.
What this calculator assumes
This calculator uses simple commercial assumptions. It does not include VAT, overheads, staff costs, repeat purchases, lifetime value, refunds, disputed leads or seasonality.
The result is a planning estimate, not a forecast. Use it to test whether the numbers are worth exploring before committing serious spend.