Guide

What Is LTV:CAC?

LTV:CAC compares the value a customer brings over time with the cost to acquire that customer. It is one of the cleanest checks for whether growth is sustainable or just expensive.

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Especially relevant for SaaS, subscription, and repeat-purchase businesses.Pairs naturally with payback period and churn.Helps you decide whether acquisition or retention is the next bottleneck.

Formula

LTV:CAC = Customer Lifetime Value / Customer Acquisition Cost

If a customer is worth $240 over time and costs $80 to acquire, the ratio is 3:1. That might be healthy if payback is also fast.

Metric Definitions

How to interpret the ratio

Ratio	Typical reading	Common next step
Below 1:1	Acquisition costs more than the customer is worth	Fix retention or acquisition first
1:1 to 2:1	Potentially viable but tight	Improve onboarding, upsells, or conversion quality
3:1 or higher	Often healthy for scaling	Watch payback and market saturation

Guide

Why this ratio matters

It helps you avoid scaling a campaign that looks good on ROAS but weak on true business value.
It connects media performance to retention economics.
It gives the finance team a metric they can use in planning discussions.

Key Pages

01 LTV:CAC Calculator Continue exploring this topic. Open 02 What is ROAS? Continue exploring this topic. Open 03 Methodology Continue exploring this topic. Open

FAQ

Common Questions

Is 3:1 always the right target?

No. The right ratio depends on margin, payback speed, and growth stage.

Does LTV:CAC replace ROAS?

No. ROAS is the short-term revenue view; LTV:CAC is the longer-term economics view.

Why is payback important?

Because a healthy ratio can still be risky if the cash comes back too slowly.