Customer Acquisition Cost

Advertising produces plenty of numbers. Impressions, clicks, and visit counts all land on the dashboard in neat rows. None of those numbers answers whether the money was well spent.

When Grace asked at month end what $23,000 of ad spend had produced, the answer Ravi had available was 120,000 clicks. A lot of clicks means the ads got clicked, not that the customer count went up.

Dividing the money spent by the customers gained ends that conversation in a single figure. Customer acquisition cost is that one line of division, and it's also the door to the next question — whether this spending should continue.

Take everything spent on winning customers over a period and divide it by the customers newly gained in that period.

The hard part is the numerator. Counting only media spend is easy and comes out lower than reality. Four items usually belong in it.

1. Media spend — what was paid directly to the platforms.
2. Salaries — the portion of marketing and sales pay that went to acquisition.
3. Tooling — subscriptions for ad management, email, and customer records.
4. Agencies and fees — content production, partner commissions, payment processing.

Spend $23,000 on media and $11,500 on salaries, gain 300 new customers, and $34,500 divided by 300 gives $115 for the month. Count media alone and the figure reads $77, a third lighter than the truth.

The denominator needs settling too. Include customers who arrived through referrals rather than ads and the apparent ad efficiency inflates. So teams keep a separate figure counting only customers from paid channels, and break it down per channel. An overall average of $115 that splits into $69 on search and $310 on display makes the budget decision visible on the spot. Without that split, a single blended figure can look healthy while one channel quietly burns most of the money.

"CAC is $115 and lifetime value is $310. Right now it clears."

What a customer will pay exceeds what it cost to get them.

"This one channel is running three times the CAC. Let's shift budget to search."

Breaking it out per channel exposed a wide efficiency gap.

"You calculated it without salaries in there. That reads lower than reality."

Something is missing from the numerator.

Pagedeck reviews this monthly, per channel. Ravi's first version of the table held media spend only; Grace asked for two sales salaries to go in, and the figure rose from $77 to $123. The number didn't get worse — it had simply been wrong until then. One figure doesn't settle the judgment, so the multiple against lifetime value, LTV to CAC, sits in the same table.