What customer acquisition cost tells you
Customer acquisition cost (CAC) is the average amount you spend to win one new customer. It is the denominator of nearly every growth decision: pricing, payback period, how much you can afford to bid on ads, and whether your business model actually works at scale. The calculation is straightforward — total sales and marketing costs over a period, divided by the number of new customers acquired in that period.
This calculator does that division for you. For an honest figure, include the full cost of acquisition: ad spend, agency or tool fees, and the portion of salaries spent winning customers — not just media cost. A CAC that counts only ad spend flatters itself and hides the true cost of growth. Measure it consistently over the same window in which the customers were won.
CAC only means something next to two other numbers. Compared with customer lifetime value (LTV), it tells you whether each customer is worth more than they cost — the LTV:CAC ratio investors live by. Compared with your average order value and margin, it tells you how long until a customer pays back their acquisition cost. A rising CAC is an early warning that a channel is saturating or targeting is drifting.
TriMediaX works to lower CAC and lift lifetime value at the same time — sharper targeting and creative to reduce cost, better retention and offers to raise value. Use this tool to benchmark your CAC, then let us help bring it down.
Frequently asked questions
How do I calculate CAC?+
Divide your total sales and marketing spend for a period by the number of new customers acquired in that period. Spending 20,000 to win 100 customers is a CAC of 200.
What should I include in CAC?+
Everything spent to acquire customers: ad spend, agency and tool fees, and the relevant share of sales and marketing salaries — not just media cost.
What is a good CAC?+
There is no universal figure; a good CAC is one comfortably below the lifetime value of the customer it wins. Aim for an LTV:CAC ratio of about 3:1 or better.
How is CAC different from CPA?+
CPA (cost per acquisition) often refers to a conversion action like a lead; CAC specifically measures the cost to win a paying customer, including broader sales and marketing costs.
How can we reduce CAC?+
Improve targeting and creative efficiency, raise conversion rates, and lean on channels with compounding returns like SEO and referrals. TriMediaX optimises across all of these.
Marketing, engineered.
TriMediaX turns numbers like these into revenue with data science, neuromarketing and behavioural analysis.