How to track which marketing actually brings customers: a simple setup for small businesses
Track three things for every source: enquiries (calls and forms), customers, and money spent. Tag every link you control with UTM parameters (Google says to always use utm_source, utm_medium and utm_campaign), track calls and form submissions as conversions, ask every new customer how they found you, and fill in one sheet a month with enquiries, customers and cost by source. That is enough to move money from what does not work to what does.
Key takeaways
Why do most small businesses not know what works?
Because the tools each report their own success. Google Ads reports clicks, Facebook reports reach, the website builder reports visits, and none of them knows who became a customer. The owner is left with a feeling about what works, usually shaped by the last good job.
The fix is not expensive software. It is a consistent way to label where each enquiry came from and a monthly habit of counting.
What should you set up?
- Tag your links. Add UTM parameters to the website link on your Google Business Profile, social profiles, email signatures and newsletters. Google Analytics says to always use utm_source, utm_medium and utm_campaign, and missing values show up as “(not set)”.
- Track forms. Make each form submission a key event (conversion) in Google Analytics and in Google Ads.
- Track calls. Use Google Ads call tracking for ads, and a call tracking number per source (website, profile, print) if calls are your main lead.
- Ask the question. Add “How did you hear about us?” to forms (a short drop-down) and to your phone script.
- Record customers. When a job is booked, note the source next to the customer in your CRM, job tool or spreadsheet.
- Count monthly. Fill in the sheet below on the first of each month.
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What does the monthly sheet look like?
| Source | Spend | Calls | Forms | Customers | Cost per customer |
|---|---|---|---|---|---|
| Google Ads | $1,800 | 38 | 12 | 14 | $129 |
| Google Business Profile and maps | $0 (time) | 41 | 6 | 15 | Time only |
| Website organic | $300 (SEO) | 9 | 8 | 5 | $60 |
| Facebook and Instagram | $400 | 3 | 10 | 2 | $200 |
| Referrals and repeat | $0 | 15 | 2 | 9 | Free |
Illustrative example with made-up figures to show the layout, not a benchmark or client result. In this example, Meta ads cost the most per customer, so the next month’s test would be a better offer there or moving $200 to Google Ads.
How do you handle customers who touch several sources?
Many customers see a Facebook post, search your name on Google and then call from the map listing. Do not over-think it. For a small business, record the source the customer names and the source of the first enquiry; where they differ, note both. After three months, patterns are clear enough to act on.
Watch your branded searches (people searching your business name). If they grow while you run social ads, the ads are working even if the calls are recorded under Google.
What should you do with the numbers?
- Compare each source’s cost per customer with your ceiling: the profit a new customer brings.
- Move 10 to 20% of budget per month from the worst source to the best, and watch the next month.
- Investigate any source with many enquiries and few customers: it may be bringing the wrong people, or your follow-up may be slow.
Then use the numbers to set next year’s budget: see how much a small business should spend on marketing.
Frequently asked questions
How do I know where my customers come from?
Combine three signals: UTM-tagged links in Google Analytics, call and form tracking, and asking every customer how they heard about you. Record the source next to each customer and count monthly.
What are UTM tags?
Short labels added to a link (for example ?utm_source=google&utm_medium=organic&utm_campaign=gbp) that tell Google Analytics where a visit came from.
Do I need call tracking?
If phone calls are your main source of leads, yes. Without it, your reports show forms only and undercount the channels that make the phone ring.