Analytics & CRM

CPC, CPA and CAC: which cost should guide your marketing?

Understand cost per click, enquiry and customer with a worked example. CPCInsider pairs former Google experience with practical campaign and CRM measurement.

Vladlens Kecko · 2026-10-05 · 4 min read

Cost per click tells you what traffic costs. Cost per acquisition or action tells you what a chosen conversion costs. Customer acquisition cost tells you what it costs to win a new customer within a defined cost scope. They answer different questions, so a cheaper click does not necessarily mean a healthier business.

CPCInsider is co-founded by Arturs Rubins, a former Google specialist. We bring that platform experience together with CRM reporting to help businesses judge advertising beyond the price of a click.

1. Define the denominator first

Google defines average CPC using click cost divided by clicks. A Google Ads CPA depends on the conversion being counted. If it counts an enquiry, do not label that number customer acquisition cost. State the event and attribution method beside the figure.

2. Work through one consistent example

The following figures are fictional and are not Latvian market averages. Suppose one completed acquisition cohort records €1,200 in advertising spend, 600 clicks, 30 valid enquiries and six new customers. Average CPC is €2, enquiry CPA is €40, and media-only customer cost is €200.

If the same scope also includes €600 of acquisition labour and creative costs, the illustrative fully loaded CAC is €1,800 divided by six: €300. Define which costs are included consistently. Do not count returning customers as new customers or silently omit significant acquisition work.

3. See why lower CPC can mislead

Imagine another campaign spends the same €1,200 for 1,200 clicks, 24 enquiries and three new customers. CPC improves to €1, but enquiry CPA rises to €50 and media-only customer cost rises to €400. Cheap traffic did not produce cheaper customers in this example.

The correct response is to inspect intent, landing-page fit and follow-up. It is not to conclude that a higher CPC is always desirable. Use the keyword selection worksheet and review outcomes before deciding which traffic deserves more budget.

4. Match the time period to the sales process

This month's spend and this month's won deals may describe different customer groups. For a longer sales cycle, track enquiries created in a defined period and revisit their eventual outcomes. Label open opportunities separately; do not treat them as either won customers or permanent failures.

Where several channels contributed, document your allocation rule and use it consistently. Keep CRM totals as a separate commercial view. A platform's attribution credit is not evidence that all credited customers would disappear without that platform.

5. Choose a decision rule your business can support

Agree an acceptable acquisition cost based on your own contribution margin, capacity and cash-flow constraints. Avoid a universal “good CPC” for Latvia: offer, competition and conversion quality differ. Use the advertising cost calculator to test assumptions, not to claim a guaranteed outcome.

Review lead acceptance alongside costs. If CPA falls because weak enquiries increase, tighten qualification and investigate targeting. If lead quality stays healthy but customers are delayed, inspect sales follow-up before cutting a relevant campaign.

Connect advertising cost to customer outcomes

Request a free performance audit or explore tracking, attribution and CRM support. We can discuss which definitions and missing data currently prevent you from making a confident budget decision.