Customer acquisition cost is how much a business spends to win one new customer. Divide total sales and marketing costs by the number of new customers.
Customer acquisition cost measures how much you spend to win each new customer. The formula is straightforward: total sales and marketing costs divided by the number of new customers in the same period.
Include everything: ad spend, marketing salaries, sales salaries, software tools, agency fees, and content production costs. Many companies undercount CAC by only including ad spend, which makes their unit economics look better than reality.
CAC matters most when compared to Customer Lifetime Value (LTV). The standard benchmark is a 3:1 LTV to CAC ratio. If your average customer is worth $9,000 over their lifetime, you can afford to spend up to $3,000 to acquire them.
CAC varies dramatically by industry and channel. B2B SaaS companies average $200 to $800 for SMB customers and $5,000 to $50,000 for enterprise. Service businesses typically see $150 to $500 per new customer through digital channels.
If you do not know your CAC, you cannot know whether your growth is profitable. Many companies grow revenue while losing money on every customer because their CAC exceeds their margins. PE firms evaluate CAC as a core metric during due diligence.
CAC = Total Sales & Marketing Costs / Number of New Customers AcquiredOnly counting ad spend and ignoring salaries, tools, and agency costs
Measuring CAC monthly when your sales cycle is 6 months, which skews the numbers
Not segmenting CAC by channel, which hides which channels are profitable
Customer lifetime value is the revenue or profit a business expects from one customer over the full relationship.
Cost per acquisition benchmarks compare the cost of winning a customer with relevant peers. Your own trend and customer economics matter more than a broad industry average.
Revenue per employee divides annual revenue by the number of full-time employees. It is a rough efficiency measure that only makes sense beside similar businesses.
Net revenue retention shows how recurring revenue from existing customers changed after upgrades, downgrades, and cancellations. It excludes new customers.
A good CAC depends on your customer lifetime value. The benchmark is a 3:1 LTV to CAC ratio. If customers are worth $3,000, your CAC should be under $1,000. B2B companies typically have higher CAC but also higher LTV.
Improve conversion rates at each funnel stage, invest in organic channels (SEO, content, referrals), optimize ad targeting, and reduce sales cycle length. Often the fastest win is fixing your website conversion rate rather than spending more on ads.
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