Efficiency Engine

CAC Payback

The ultimate unit economics validator. Measure exactly how many months it takes to recover your customer acquisition costs (CAC).

Growth Metrics

Enter your monthly spend and acquisition numbers.

Total Sales Spend

Total Marketing Spend

New Customers Acquired (This Month)

ARPU (Monthly)

Gross Margin (%)

Capital Velocity

In the subscription economy, CAC Payback is the single most important metric for capital-efficient growth. It determines how fast you can reinvest profits to acquire new customers without external funding.

Reinvestment

Exceptional SaaS companies target < 6 months. Standard healthy growth is 6-12 months for mid-market B2B segments.

Gross Basis

Always calculate based on Gross Profit, not Revenue. COGS must be factored out to see the real payback dynamics.

2026 Benchmarks

Payback Period	Health Rating
< 6 Months	Extraordinary
6-12 Months	Healthy
12-18 Months	Retention Dependent
> 18 Months	Capital Intensive