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Glossary

Customer acquisition cost (CAC): what it means in practice.

The average cost to win a new customer.

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What is customer acquisition cost (CAC)?

Short answer: Customer acquisition cost is the average cost to win a new customer: marketing and sales spend divided by new customers in the same period. Spending $10,000 to win 125 customers is a CAC of $80. It decides whether marketing paid for with growth funding will earn back its cost in time.

Key facts

  • CAC = sales and marketing spend ÷ new customers
  • Include sales salaries
  • Compare CAC with gross margin, not revenue
  • High churn can make low CAC unprofitable

Related: Business Funding Glossary: 70 Terms Explained · Factor Rate Explained: How MCA Pricing Works · What Business Funding Costs in Canada, Compared · Business Funding Comparisons for Canadian Owners · Business Funding Calculators in Canadian Dollars

In plain language

The average cost to win a new customer.

CAC is marketing and sales spend divided by new customers in a period.

Why it matters

It decides whether growth funding pays back.

An example

$10,000 spent to win 125 customers is a CAC of $80.

What to watch for

In practice for Canadian businesses

Used to judge marketing spend.

Questions to ask

How it shows up in a funding file

Reviewers do not need CAC but it supports marketing requests.

A common misreading

A low CAC with high churn may still not pay back.

Related terms and next steps

Glossary terms are most useful next to the decisions they affect. If you are comparing offers, read the pages on factor rates, payback amounts and the repayment cap together. If you are preparing an application, the documents checklist and requirements pages explain what is read. And if a term in an agreement is unclear, ask the funder to explain it in writing before you sign; a good funder will.

In more detail

CAC should be compared with the gross profit a customer generates over their lifetime. A common rule of thumb is that lifetime gross profit should comfortably exceed CAC, and that payback should be well within a year for funding-backed growth.

Questions to ask a funder about any term

Where you will see it

CAC is calculated from your marketing and sales spending, which appears in bank statements as payments to ad platforms, agencies and sales staff, and from the number of new customers in your sales system. Funders rarely ask for it, but having it ready strengthens any request to fund marketing.

Reading any funding term

Most funding terms come back to two questions: how much will I repay in total, and how will each payment affect my cash in a normal month and a slow one. When you meet an unfamiliar term in an offer or agreement, translate it into those two answers before deciding whether it matters. If a funder cannot explain a term in plain language and with your own numbers, treat that as useful information about the offer.

Related terms

These terms often appear alongside customer acquisition cost (cac) in offers, agreements and conversations with funders:

Sources and review

Reviewed by the Merchant Fund Express team on October 12, 2026. Official pages checked as of that date.

Common questions

How does CAC relate to funding?

It shows whether marketing funded by an advance can repay it.

Where can I learn more?

See the related guides and the comparison pages, or apply and ask.

Is this legal advice?

No. It is educational information, and agreements vary.

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