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title: "CAC and LTV"
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type: concept
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tags: ["unit-economics", "metrics", "growth", "acquisition"]
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last_updated: 2026-04-26
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---
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## Definition
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客户获取成本(CAC)与生命周期价值(LTV)——增长的核心单位经济学指标组合,用于衡量获客效率是否可持续。LTV:CAC ≥ 3:1 为健康增长门槛;CAC 回本周期 < 6个月。
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## Metrics
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- **CAC(Customer Acquisition Cost)**:获取一个新客户所需的平均成本 = 总营销支出 / 新增客户数
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- **LTV(Lifetime Value)**:一个客户在整个生命周期内为产品贡献的总收入 = 平均收入/用户/年 × 平均客户留存年数
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- **LTV:CAC Ratio**:衡量获客投入产出比,健康值 ≥ 3:1
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- **CAC Payback Period**:收回获客成本所需时间,健康值 < 6个月
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## Why It Matters
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增长黑客必须在追求快速增长的同时,确保单位经济学健康——否则增长越快,亏损越大。LTV:CAC 是增长决策的最高优先级指标。
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## Source
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- [[marketing-growth-hacker]](Marketing Growth Hacker Agent)
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## Aliases
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- Customer Acquisition Cost
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- Lifetime Value
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- Unit Economics
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