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Customer Acquisition Cost (CAC)

Total Marketing Spend ($)

New Customers Acquired

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とは何か Customer Acquisition Cost?

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Customer Acquisition Cost (CAC) is the total marketing and sales spend required to acquire one new paying customer. Low CAC relative to Customer Lifetime Value (LTV) indicates a healthy business.

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公式

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f(x)CAC = Marketing spend / New customers acquired | Payback period = CAC / Profit per customer | Typical target: <12 months

方法 Customer Acquisition Cost

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1CAC = Total marketing & sales spend / New customers acquired
2Track over a specific period (month, quarter, year)
3LTV:CAC ratio > 3:1 is generally considered healthy
4Payback period = CAC / Monthly gross margin per customer

解いた例

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例 1

入力:Spend $50k in Q1, acquire 200 customers

結果:CAC = $50,000 / 200 = $250 per customer

実際の応用

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Personal financial planning and budget setting

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Comparing loan options before signing agreements

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Understanding the true cost of borrowing over time

LTV:CAC Benchmarks

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LTV:CAC ratio	Interpretation
< 1:1	Unsustainable — spending more to acquire than customer is worth
1:1 to 3:1	Marginal — needs improvement
3:1	Healthy — standard SaaS benchmark
> 5:1	Excellent — or under-investing in growth

よくある質問

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What is Cac Calc?

Customer Acquisition Cost (CAC) is the total marketing and sales spend required to acquire one new paying customer. Low CAC relative to Customer Lifetime Value (LTV) indicates a healthy business

How accurate is the Cac Calc calculator?

The calculator uses the standard published formula for cac calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Cac Calc calculator use?

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Cac Calc calculator use?

The core formula is: CAC = Total marketing & sales spend / New customers acquired. Each step in the calculation is shown so you can verify the result manually.

参考文献

›CAC — Andreessen Horowitz

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Reviewed October 2026

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